Loading…
Get your ticket and addional infos at jcon.one

Log in to bookmark your favorites and sync them to your phone or calendar.

Tuesday, October 5
 

09:00 CEST

Application Penetration Testing – DOs and DON‘Ts
"Penetration Test" - an attack simulation. But how is pentesting defined? Are there "paid hackers"? How does efficient application testing works? How do I mitigate risks? The talk spotlights well known methods and "hack" within these methods, to speed up testing and be way more efficient. The following questions will be answered: - Should I test against Dev/Stage/Prod? - What's the best time for testing? - What's an efficient approach for testing roles and rights? - Why is OWASP Top 10 a great document, but not usable for Penetration Testing? - Why are CATCHAs a potential problem for testers? - Should I test with or without the Web Application Firewall? - What do you mean by "horizontal and vertical privilege escalation"? The talk covers test experience of 20 years and hundreds of web applications.

Speakers
avatar for Tobias Glemser

Tobias Glemser

CEO of secuvera, BSI certified penetration tester, secuvera GmbH
Tobias Glemser, Geschäftsführer der secuvera, ist BSI-zertifizierter Penetrationstester und Technischer Leiter für Penetrationstests. Herr Glemser ist Autor mehrerer Fachartikel u.a. in den Zeitschriften c’t und iX und Referent bei Seminaren und Kongressen (z. B. OWASP AppSec... Read More →


Tuesday October 5, 2021 09:00 - 10:00 CEST
#2 Main EN/DE

09:00 CEST

Motivation in agilen Teams - Was uns wirklich antreibt
Wer wünscht sich nicht ein Team, in dem alle mitdenken, Verantwortung übernehmen und jeden Tag aufs Neue mit Freude an den gemeinsamen Zielen Arbeiten? Intrinsische Motivation heißt das Zauberwort. Viele sind angetreten, um uns zu erklären, wie wir diese Motivation bei unserem Umfeld wecken können. Die schlechte Nachricht vorweg: Intrinsische Motivation kann nicht von außen initiiert werden :-( Aber die Wissenschaft ist sich einig, dass es Wege für die Schaffung eines motivationsförderndes Umfelds gibt. Und die funktionieren tatsächlich! Neben einem Ausflug in die Theorie legen wir einen Fokus auf Best Practices für agile IT Teams.

Speakers
avatar for Julius Mischok

Julius Mischok

CTO, Mischok GmbH
Julius Mischok ist Geschäftsführer der Mischok GmbH in Augsburg. Seine Kernaufgaben sind Prozessentwicklung, sowie Coaching und Schulung der Entwicklungsteams. Aktuell fokussiert sich seine Arbeit auf die Frage, wie Software schnell und mit einer maximalen Wertschöpfung produziert... Read More →


Tuesday October 5, 2021 09:00 - 10:00 CEST
#4 Agile & Culture

09:00 CEST

RapidClipse Einführung
RapidClipse ist eine visuelle Java Entwicklungsumgebung für die schnelle und effiziente Entwicklung individueller Business-Applikationen für den professionellen Einsatz in Unternehmen. Mit RapidClipse lassen sich moderne Web-Oberflächen auf Basis des neuen Web-Components-Standards bequem mit der Maus designen. UI-Designer brauchen dafür keinerlei Programmierkenntnisse und spätere Änderungen sind unkompiziert. Vor allem bei Projekten mit hohem UI-Anteil, lassen sich Entwicklungszeit und -kosten um bis zu 90% einsparen. Der generierte Code besitzt eine hohe Qualität und ist vor allem immer gleich. UI-Code selber zu schreiben ist daher nicht mehr wirtschaftlich. RapidClipse ist seit 2014 auf dem Markt und wird von vielen Unternehmen, wie der Allianz SE, für die Entwicklung datengetriebener Geschäftsanwendungen eingesetzt. Nachdem im vergangenem Jahr mit RapidClipse X ein vollständig neuer UI-Builder auf Basis von Web-Components dazu kam, lag der Fokus in den letzten 12 Monaten auf der Datenbankprogrammierung und Performance. Mit MicroStream bietet RapidClipse jetzt eine neues Persistenz-Framework und Alternative zur komplizierten Hibernate-Programmierung, mit der sich hochperformante In-Memory-Datenbankanwendungen entwickeln lassen. Datenbankankzugriffe werden mit MicroStream bis zu ungaubliche 1000 Mal schneller ausgeführt, Anwendungen benötigen 90% weniger Rechenleistung, was die Server- und Cloud-Betriebskosten senkt und last but not least wird die Datenbankentwicklung damit stark vereinfacht, was die Produktivität steigert. Dieser Vortrag bietet einen vollständigen Überblick über die Arbeitsweise und Möglichkeiten mit RapidClipse.

Speakers
avatar for Markus Kett

Markus Kett

CEO, MicroStream Software GmbH
Markus has been working with Java since 20 years. Markus is co-founder and CEO at MicroStream, editor in chief for the free JAVAPRO magazine in Germany, co-organizer of the Java conference JCON in Duesseldorf, and well known as editor and speaker at many developer conferences and... Read More →


Tuesday October 5, 2021 09:00 - 10:00 CEST
#5 Low-Code

09:00 CEST

Supersonic Subatomic Mocking: How to test your Quarkus app with Kotlin, JUnit and MockK
The relatively young Quarkus framework is an increasingly serious competitor to established microservice frameworks such as Spring Boot. This is largely due to the fact that the powerful but yet lightweight application framework offers small memory footprint and reduced boot time. Hence, it’s not only interesting for developing microservices in containerized cloud platforms such as Kubernetes, but also for serverless computing. And it supports – like almost all relevant JVM frameworks – my favourite programming language: Kotlin! When developing an application with Quarkus and Kotlin you will sooner or later (hopefully sooner 😉) write isolated tests to determine whether your code behaves as expected. And as a Kotlin developer you probably want to use the technologies you are already familiar with, e.g. JUnit and MockK. But there are certain aspects you should be aware of when testing and mocking CDI beans in Quarkus. Interested? Then let me share our experiences how to test a Quarkus app with Kotlin, JUnit and MockK. Practical insights guaranteed!

Speakers
avatar for Christian Schwörer

Christian Schwörer

Distinguished Software Engineer, Novatec Consulting GmbH
In his work for Novatec Consulting GmbH Christian supports customers in the digital transformation towards distributed, cloud-based (microservice) architectures. In doing so he uses his favourite JVM-language Kotlin - primarily in combination with Spring Boot, but increasingly with... Read More →


Tuesday October 5, 2021 09:00 - 10:00 CEST
#3 Java Cloud Native

09:00 CEST

Docker Who: Small Containers Through Time and Space
Have you recently moved to microservices? Your team is deploying the code much faster, but data transfer costs are going up as well, aren’t they? That’s because the size of containers matters the most, and keeping them lightweight means saving on bandwidth usage. BellSoft’s engineers have come up with a solution, which is full-fledged Alpine Linux support in OpenJDK. By that, we’ve also invented a real-life TARDIS: Containers that take only a few MB of storage but carry enormous potential. With the release of JDK 16, the Portola Project has been integrated into the OpenJDK mainline as part of our JEP 386. Duct-taping with a glibc layer will become a thing of the past, as all the processes will connect flawlessly. Your company will get to use tiny container images independently of the distribution kit vendor. They have been available for a long time, but the official HotSpot port status for the musl library will expand the scope and simplify related development. My talk is going to touch upon the benefits that Alpine Linux is bringing to the OpenJDK community. It will also explain how to optimize Docker images for free by changing just one or two lines of code. Lastly, I’ll offer a tool for choosing an optimal container that will suit your project perfectly.

Speakers
avatar for Dmitry Chuyko

Dmitry Chuyko

Performance Architect, BellSoft
Dmitry Chuyko is a Performance Architect at BellSoft, one of the most active corporate OpenJDK developers. Previously he worked on HotSpot JVM in Oracle. His experience with Java showed that the most interesting problems in applications find their solutions in the underlying platform... Read More →


Tuesday October 5, 2021 09:00 - 10:00 CEST
#1 Main EN only

10:00 CEST

3 Patterns for Scalable Microservices
When you’re implementing scalable and independent microservices, exchanging data between them quickly becomes a challenge. You need to ensure consistency but distributed transactions create tight coupling and are no longer an option. The same is true for synchronous service calls. You need new approaches that allow you to exchange data asynchronously and ensure its consistency. Most architectures achieve that using 3 patterns: The Outbox Pattern, the View Database Pattern, and the SAGA Pattern. With the help of the outbox pattern, events are stored in Kafka and data in the service's own database. Based on this, other services can either store the data in their own view database or participate in a complex SAGA to secure a distributed write operation. In this talk, I will show exactly how all this works and what to look out for.

Speakers
avatar for Thorben Janssen

Thorben Janssen

Freelancer, Thorben Janssen
Thorben is an independent consultant, international speaker, and trainer specialized in solving Java persistence problems with JPA, Hibernate and Spring Data JPA. He is also the author of Amazon’s bestselling book Hibernate Tips - More than 70 solutions to common Hibernate problems... Read More →


Tuesday October 5, 2021 10:00 - 11:00 CEST
#2 Main EN/DE

10:00 CEST

Was gibt es neues in RapidClipse 11?
RapidClipse entwickelt sich zusammen mit dem umgebenden Software-Ökosystem weiter. In dieser Session stellen wir euch die neuen Funktionen in RapidClipse 11 vor und zeigen wie eure Projekt davon profitieren. Dabei gehen wir auch auf Verbesserungen im Dependency-Management und er Performace ein. Außerdem zeigen wir was für eine Mirgation von Version 10 auf Version 11 zu tun ist. 

Speakers
avatar for Christian Kuemmel

Christian Kuemmel

Project Manager, Senior Software Consultant, MicroStream Software GmbH
Projektleiter, Senior Software Consultant 12 Jahre im Java Umfeld tätig 8 Jahre Erfahrung im Umgang mit Hibernate Seit ca. 2 Jahren bei MicroStream


Tuesday October 5, 2021 10:00 - 11:00 CEST
#5 Low-Code

10:00 CEST

Sustainability in software engineering - how to fight climate change as a software engineer
Climate change is one of the most dramatic and urgent challenges we face globally. To fight climate change, every step counts and every single step is important - and necessary. In this talk, we will give an overview about all the different aspects that affect climate change from the software engineering perspective and discuss a number of concrete actions that every software engineer can take (and should keep in mind day-in day-out) to help fight climate change. During the talk, we will not only provide an overview of the landscape, but also cover topics in more depth, like the role of data centers in energy consumption, how to reduce energy consumption of your apps, what zombies do in this space, what renewable energy production can do and what not, how to choose a data centers wisely, what a smart kubernetes scheduler can do for you, why and how using GraalVM and Spring Native can help as well to save the climate, how carbon offsetting works and why it is only a last resort, and more.

Speakers
avatar for Martin Lippert

Martin Lippert

Spring Tools Lead, VMware
Martin works at VMware on developer tooling for the Spring framework and cloud platforms. He co-leads the team that ships all the Spring Tools for Eclipse, Visual Studio Code, Theia, and more, and is researching and implementing future cloud-based developer tooling. In addition to... Read More →


Tuesday October 5, 2021 10:00 - 11:00 CEST
#1 Main EN only
  Conference Session EN

10:00 CEST

The astonishing value of speed
Intraday lead times? Bringing a new idea out to your users in just a few hours? Irrelevant for you? Deployment once a week is sufficient? That is what many companies in Germany still think. In this session we will discuss why this conception is wrong. We will discuss how intraday lead times are basically inevitable even if you do not live in a highly dynamic market. We will see how you can save lots of money, become more flexible, how you can simplify your organization and processes, how you can reduce stress (!) and a lot more, just by going for intraday lead times. Be prepared for some surprises and get ready for a speed boost.

Speakers
avatar for Uwe Friedrichsen

Uwe Friedrichsen

CTO, codecentric AG
Uwe Friedrichsen travels the IT world for many years. As CTO of codecentric AG he is always in search of innovative ideas and concepts. His current focus areas are (distributed) system design, sustainability and humans in IT and the IT of (the day after) tomorrow.


Tuesday October 5, 2021 10:00 - 11:00 CEST
#4 Agile & Culture

11:00 CEST

Die Corona-Warn-App unter der Lupe
Leuchtturmprojekt, Kostengrab, Hoffnungsträger und wichtiger Baustein in der Pandemiebekämpfung — das deutsche Corona-Warn-App-System (kurz CWA), besteht nicht nur aus den recht prominenten nativen iOS- und Android-Apps, die Ihr vielleicht auch auf Eurem Smartphone installiert habt. Zur Umsetzung wichtiger Use Cases wie der persönlichen Risikoermitttlung, dem Melden bzw. der Benachrichtigung von (positiven) Testergebnissen oder dem Austausch mit Warn-Systemen anderer Länder, gehört auch eine vielteilige Server-Lösung. Sie basiert auf einem zeitgemäßen Architekturstil und einem aktuellen Technologie-Stack. Und wurde unter hohem Zeitdruck federführend von SAP und Deutscher Telekom realisiert. Das öffentliche Interesse an diesem Projekt ist hoch, die Transparenz bei der Entwicklung erfreulicherweise ebenfalls. Der Quellcode ist Open Source und auch die Dokumentation ist offen zugänglich. In diesem Vortrag lernt Ihr die Gesamtlösung, vor allem den serverseitigen Teil der Corona-Warn-App und seine Implementierung, kennen. Wir diskutieren die prägenden architekturrelevanten Anforderungen und die getroffenen Entscheidungen. Zum Abschluss bewerten wir die gewählten Lösungsansätze und arbeiten Stärken, Hindernisse und Kompromisse heraus.

Speakers
avatar for Falk Sippach

Falk Sippach

Software-Architekt, embarc Software Consulting GmbH
Falk Sippach ist bei der embarc Software Consulting GmbH als Softwarearchitekt, Berater und Trainer stets auf der Suche nach dem Funken Leidenschaft, den er bei seinen Teilnehmern, Kunden und Kollegen entfachen kann. Bereits seit über 15 Jahren unterstützt er in meist agilen Softwareentwicklungsprojekten... Read More →


Tuesday October 5, 2021 11:00 - 12:00 CEST
#2 Main EN/DE

11:00 CEST

Schätzungen – das Enfant terrible der Software-Entwicklung
Obwohl die wenigsten Software-Entwicklungen ohne Schätzungen auskommen, haben sie unter Entwicklern einen extrem schlechten Ruf. Aber woran liegt das? Ein Grund ist, dass eine einzige Zahl ohne Kontext zum Commitment bzw. zum Plan erklärt wird. Ich zeige euch in diesem Vortrag, dass wie wir zu besseren Schätzungen kommen und dass diese immer abhängig von der Fragestellung sind. Außerdem löse ich das Rätsel auf, warum Schätzungen immer höher werden, je genauer man schätzt.

Speakers
avatar for Konstantin Diener

Konstantin Diener

CTO, cosee GmbH
Konstantin Diener ist CTO bei cosee. Er ist leidenschaftlicher Software-Entwickler und brennt für Clean Code und Test Driven Development. Als CTO kümmert er sich mittlerweile mehr um die Rahmenbedingungen für cross-funktionale Entwicklungsteams. Er spricht regelmäßig auf Konferenzen... Read More →


Tuesday October 5, 2021 11:00 - 12:00 CEST
#4 Agile & Culture

11:00 CEST

Web-Component Oberflächen erstellen ganz ohne JavaScript-Kenntnisse
Vaadin ist ein UI-Framework, mit dem sich HTML5 Oberflächen vollständig in Java schreiben lassen. Sehr viel schneller und einfacher geht es jedoch mit dem komfortablen GUI-Builder, den die freie Eclipse Distribution RapidClipse zur Verfügung stellt. Der GUI-Builder ist ein echtes Designer-Tool. Jedes Layout lässt sich schnell und komfortabel mit Drag- and-Drop umsetzen, ohne dass man dafür Code schreiben muss. Der gesamte GUI-Code wird automatisch von der IDE generiert. Der Funktionsumfang an Controls ist enorm. Neben den gängigen Formular-Controls stehen eine Table-Komponente, Datepicker, Accordeon sowie Container für das Einbinden von Audio, Video und anderer Web-Inhalte zur Verfügung. Auch Master-Detail Ansichten, komplexe Formulare, Such- und Filterfunktionen lassen sich blitzschnell umsetzen. Layout-Manager sorgen dafür, dass sich die Oberfläche automatisch der aktuellen Displaygröße anpasst. Die HTML5 Oberfläche wird bereits zur Entwicklungszeit im GUI-Builder angezeigt. In der beeindruckenden Live-Demo erleben Sie wie schnell und einfach man mit RapidClipse grafische Oberflächen auf Basis von Vaadin für Web-Anwendungen designen kann.

Speakers
avatar for Sebastian Späth

Sebastian Späth

MicroStream Software GmbH
Als Senior Java Developer habe ich bei MicroStream in verschiedenen Projekten gearbeitet. In knapp 10 Jahren habe ich fast alle Stationen durchlaufen und mir dabei jede Menge unterschiedliches Know-how aneignen können. Über das tagtägliche Lösen technischer Support-Fälle, unzähliger... Read More →


Tuesday October 5, 2021 11:00 - 12:00 CEST
#5 Low-Code

11:00 CEST

Thread internals and related design patterns
The session will discuss the internals of Java threads and how some design patterns are implemented using them. This includes ordering of requests, resource management and avoiding head of line blocking. Although the session will be targeted at Java users, the principles can be extended to any distributed system architecture.

Speakers
avatar for Gaurav Sen

Gaurav Sen

Founder, InterviewReady
I am a software engineer and content creator. My YouTube channel on system design and algorithms has more than 340k subscribers. I have also recently received the LinkedIn Top Voices 2021 award. I am the founder of InterviewReady. It hosts a video course which helps engineers get... Read More →


Tuesday October 5, 2021 11:00 - 12:00 CEST
#1 Main EN only

11:00 CEST

What’s new in Micronaut 3.0?
In this talk Micronaut creator, Graeme Rocher, will provide an introduction to Micronaut and cover all the new features in the latest 3.0 release of Micronaut include advancements in Dependency Injection, Aspect Oriented Programming and more.

Speakers
avatar for Graeme Rocher

Graeme Rocher

Architect, Oracle
Graeme Rocher is the creator of several popular Open Source projects including Grails (https://grails.org) and Micronaut (https://Micronaut.io) and co-author of "The Definitive Guide to Grails" (Apress - http://apress.com/book/view/1590599950). Graeme currently works as an Architect... Read More →


Tuesday October 5, 2021 11:00 - 12:00 CEST
#3 Java Cloud Native

12:00 CEST

Dream-Team Jakarta EE + MicroProfile
Enterprise-Anwendungen müssen kleiner werden. Die Zeit großer Monolithen ist für viele vobei - Microservices versprechen kürzere Releasezyklen und leichtere Innovation. Wer nun der Meinung ist, dass das mit Jakarta EE nicht geht, liegt falsch. MicroProfile ergänzt das Serverangebot um Dinge, die im verteilten Cloud-ready-Umfeld benötigt werden. Konfiguration und Überwachung werden damit ebenso zur Kleinigkeit wie fehlertolerante Kommunikation zwischen Services. Mit MP 4.0 kommen u. a. Reactive Messaging und GraphQL hinzu. Cool ist zudem, dass das Ganze sowohl mit klassischen Servern wie WildFly oder Open Liberty funktioniert, aber auch mit Frameworks wie Quarkus implementiert werden kann.

Speakers
avatar for Dirk Weil

Dirk Weil

CEO, GEDOPLAN GmbH
Dirk Weil ist seit 1998 als Berater im Bereich Java tätig. Als Geschäftsführer der GEDOPLAN GmbH in Bielefeld ist er für die Konzeption und Realisierung von Informationssystemen auf Basis von Java / Jakarta EE verantwortlich. Seine langjährige Erfahrung in der Entwicklung anspruchsvoller... Read More →


Tuesday October 5, 2021 12:00 - 13:00 CEST
#2 Main EN/DE

12:00 CEST

RapidClipse Oberflächen mit 3rd Party Komponenten erweitern
RapidClipse ist eine visuelle Java Entwicklungsumgebung für die schnelle und effiziente Entwicklung individueller Business-Applikationen für den professionellen Einsatz in Unternehmen. Die Standardpalette bietet bereits eine vollumfängliche Komponentenauswahl für einen einfachen Start in die Entwicklung. Für komplexere Komponenten stellt Vaadin sogenannte Addons zur Verfügung welche in jedes RapidClipse Projekt problemlos integriert werden können. In der beeindruckenden Live-Demo erleben Sie wie schnell und einfach man mit RapidClipse die folgenden 3rd Party Komponenten aus der Vaadin Bibliothek integrieren kann.
  1. LeafletMap for Vaadin (https://vaadin.com/directory/component/leafletmap-for-vaadin )
  2. Chip-ComboBox for Vaadin (https://vaadin.com/directory/component/chip-combobox-for-vaadin )
  3. DateRangePicker for Vaadin (https://vaadin.com/directory/component/daterangepicker-for-vaadin )

Speakers
avatar for Sebastian Späth

Sebastian Späth

MicroStream Software GmbH
Als Senior Java Developer habe ich bei MicroStream in verschiedenen Projekten gearbeitet. In knapp 10 Jahren habe ich fast alle Stationen durchlaufen und mir dabei jede Menge unterschiedliches Know-how aneignen können. Über das tagtägliche Lösen technischer Support-Fälle, unzähliger... Read More →


Tuesday October 5, 2021 12:00 - 13:00 CEST
#5 Low-Code

12:00 CEST

Helidon on Loom
Introduction into the threading model of a reactive application will be followed by a deep dive into Helidon features in this area, such as Context API and how it is utilized in various modules. A transition is then made to Helidon's blocking model (Helidon MP with CDI and JAX-RS) to show the main transition points and challenges this brings. Then we will look at how the picture changes with Executors.virtualThreadExecutor() in project Loom.

Speakers
avatar for Tomáš Langer

Tomáš Langer

Consulting Member of Technical Staff, Oracle
Tomas Langer works in Oracle since the founding of project Helidon, currently as Helidon Architect. Tomas is also an active developer of the project.Tomas has experience in service architecture and its evolution from integration, through SOA to the current microservices approach... Read More →


Tuesday October 5, 2021 12:00 - 13:00 CEST
#3 Java Cloud Native

12:00 CEST

Limited work-in-progress for developers
The idea of limited work-in-progress (WIP) is coming from Lean methodologies. At its core it means that new tasks should only be started when the current piece of work is done and delivered. Finding the right work-in-progress limit can increase overall system (organisation) throughput. This idea can be applied on many levels including writing code. In this live coding session I will write FizzBuzzWoof code kata in Kotlin showcasing software development workflows which can be used for limiting work-in-progress. In particular: change size notifications, auto-revert, TDD, TCR (test && commit || revert).

Speakers
avatar for Dmitry Kandalov

Dmitry Kandalov

Software Developer, Code Mine
Dmitry has been programming since DOS times. He spent last 15 years or so in Java lands most recently working with server-side Kotlin.


Tuesday October 5, 2021 12:00 - 13:00 CEST

12:00 CEST

Software Architects and Autonomous Teams
The role of a software architect has a broad range of interpretations. Most likely an architect is seen as someone who makes decisions regarding the software architecture, is responsible for the quality of software or even enforces technical standards, tools and platforms. On the other side, to gain speed in development and releasing software, the movement from functional teams towards cross functional and autonomous teams blur the lines of responsibilities and the capabilities to make decisions. How can a software architect facilitate the idea of autonomous teams? This talk is an experience report elaborating on different ways how to integrate an architect into an organization with multiple development teams, what we learned and how we continuously improved to avoid friction in the process of developing software.

Speakers
avatar for Pascal Euhus

Pascal Euhus

Reservix GmbH
Pascal Euhus is a passionated developer, architect and cloud enthusiast. He loves to tinker around with everything related to automation, CI/CD, software quality and agile organization structures. Pascal is currently an engineer at Reservix GmbH. Apart from IT related stuff he loves... Read More →


Tuesday October 5, 2021 12:00 - 13:00 CEST
#4 Agile & Culture

12:00 CEST

The art of clean code
Figuring out how to architect a new application is a big deal and a tremendous amount of time and significant resources are lost because of poorly written code. Developers very often rush because they feel pressure from their managers or from the client to get the job done quickly, sometimes even sacrificing quality. Doing it the wrong way can lead to a huge headache later so in this presentation, we're going to look at: • What is clean code? • Characteristics of clean code • How to start clean coding • Importance of clean code

Speakers
avatar for Chiamaka  Okenwa

Chiamaka Okenwa

Software Engineer, Renmoney
Chiamaka Okenwa is a software engineer with a demonstrated history of working in the fin-tech space with a focus on product design and development. She is passionate about Java, women in technology and developer communities, serving as an International speaker and community organizer... Read More →


Tuesday October 5, 2021 12:00 - 13:00 CEST
#1 Main EN only

13:00 CEST

Lessons Learned: arc42 in einem DevOps Team
In diesem Vortrag berichte ich von meinen Erfahrungen, Erfolgen und Fehlern mit dem arc42-Architekturtemplate in einem DevOps-Team im Konzernumfeld mit Produktentwicklungsfokus. Produktentwicklung ist geprägt von kurzen Iterationszyklen und wird darum gerne agil betrieben, wie im Team des Sprechers. Dort wurde die vorhandene unstrukturierte Dokumentation in das arc42-Template überführt und in einem Wiki abgelegt. Im Laufe der Zeit stellte sich heraus, dass das Tooling eine entscheidende Rolle für die Qualität der Dokumentation bedeutet und deswegen auf Docs-as-Code umgestellt. Im Laufe des Vortrags wird auf die wichtigsten Entscheidungspunkte für die aktuelle Iteration der technischen Softwarearchitektur eingegangen. Darunter unter anderem der Umgang mit "Entwicklerprosa", veralteter Dokumentation und der für ein DevOps-Team besonders wichtigen Architekturentscheidungen. Die Einbindung in das methodische Vorgehen Kanban wurde mit arc42 und einer Microsite basierend auf AsciiDoc möglich. Nicht ausgespart werden die gemachten Fehler, wie zum Beispiel fehlende Qualitätssicherung erstellter Dokumentation oder die Vermischung von fachlichen und technischen Themen.

Speakers
avatar for Johannes Dienst

Johannes Dienst

Softwarearchitect / DevOps Engineer, DB Systel
Johannes Dienst is a passionate softwarecrafter at DB Systel GmbH. His work focuses on content management, DevOps and software quality.


Tuesday October 5, 2021 13:00 - 14:00 CEST
#4 Agile & Culture

13:00 CEST

Persistenz in RapidClipse mit Hibernate
WIP

Speakers
avatar for Christian Kuemmel

Christian Kuemmel

Project Manager, Senior Software Consultant, MicroStream Software GmbH
Projektleiter, Senior Software Consultant 12 Jahre im Java Umfeld tätig 8 Jahre Erfahrung im Umgang mit Hibernate Seit ca. 2 Jahren bei MicroStream


Tuesday October 5, 2021 13:00 - 14:00 CEST
#5 Low-Code

13:00 CEST

Serialization & Object Graph Communication
Tatsächlich war die Java-Serialisierung für die beabsichtigten Zwecke gut konzipiert. In den neunziger Jahren waren große Themen des Tages die transparente Persistenz von Objekten und verteilten Objekten. Transparente Persistenz ist die Fähigkeit, Objekte zu speichern und wiederherzustellen, ohne dass expliziter Code in diesen Objekten erforderlich ist. Bei verteilten Objekten werden Objekte und Interaktionen zwischen Objekten über ein Netzwerk übertragen, wie in Java RMI. Im Kontext der späten neunziger Jahre unterstützte die Java-Serialisierung beide Ziele recht gut. Im Laufe der Jahre erkannte man die Mängel im Design und die Sicherheits-Schwachstellen. Wir werden diskutieren, wie Datenserialisierung und Deserialisierung in Software verwendet werden, welche Gefahren die Deserialisierung nicht vertrauenswürdiger Eingaben birgt und wie Sicherheitslücken bei der Deserialisierung vermieden werden können.

Speakers
avatar for Florian Habermann

Florian Habermann

CTO, MicroStream Software GmbH
Java since 1999. For over 20 years, the main goal of his daily work is making database development with Java much easier and faster than it is today. He still uses every free minute for coding and research.


Tuesday October 5, 2021 13:00 - 14:00 CEST
#3 Java Cloud Native

13:00 CEST

Effective Java SE 16 APIs/Lang features, makes your life easier
Starting from Java SE 9+, a significant release for the Java programming language and the Java virtual machine. And java works fast to cope with the new technology era, and we see this every six months; Java SE 16 and 17 includes many changes. The library additions and the new language features we’re going to look at here are all fairly significant. They’re beneficial in your day-to-day work. So, let’s take a tour of the new features in Java SE 16, powered by code, the platform designed to support faster learning and more productive Java development.

Speakers
avatar for Mohamed Taman

Mohamed Taman

Chief Solutions Architect, Effortel
Adopts Java SE.next(), JakartaEE.next(), a JCP member, Was JCP Executive Committee member, JSR 354, 363 & 377 Expert Group member, EGJUG leader, Oracle Egypt Architects Club board member, speaks Java, love Mobile, Big Data, Cloud, Blockchain, DevOps. An International speaker, 4 books... Read More →


Tuesday October 5, 2021 13:00 - 14:00 CEST
#1 Main EN only

13:00 CEST

[LIVE CODING] REST in peace, Apache Kafka is alive
Nowadays every Java Developer can write a REST microservice, but it's also possible to use messaging with Apache Kafka! Messaging is typically used for event streaming and can be compared by a pipeline of sending or receiving (big) data. It's quicker, can handle a lot of data and is easy to use. Let's create a Spring Boot application with a producer and consumer. Time to see it in action!

Have a look at the Session Teaser!​​​

Speakers
avatar for Ko Turk

Ko Turk

Senior Java Developer, Blue4IT
Hi! My name is Ko Turk (@KoTurk77), working as a Senior Java Developer for Blue4IT and currently on an assignment at Rabobank. Besides working on creating bad ass software, I’d like to speak at conferences and JUGS. Please contact me through Twitter or let's meet at the Utrecht... Read More →


Tuesday October 5, 2021 13:00 - 14:00 CEST
#2 Main EN/DE

14:00 CEST

RapidClipse meets MicroStream
Hibernate hat über die letzten Jahre hervorragende Dienste in vielen verschiedene großen Applikationen geleistet. Leider sind wahrscheinlich genauso viele Applikationen mangels tiefgreifendes Fachwissen an Hibernate im fortgeschrittenen Projektverlauf gescheitert. Was tun also also wenn Hibernate Kapazitäten nicht oder nur begrenz vorhanden sind oder Performace während der Entwicklung sowie zur Laufzeit einfach super wichtig sind. Dann wird es Zeit sich nach Alternativen umzuschauen und eine davon ist MicroStream. MicroStream sorgt endlich dafür, dass ein Objektmodell auch so designed werden kann wie es sich gehört und nicht wie es Hibernate vorschreibt. Lästiges langsames OR-Mapping gehört der Vergangenheit an. Hibernate Object Lifecycle, Caching und noch viele weitere komplizierte Architekturebenen gehören mit MicroStream der Vergangenheit an. Wer dann auch noch sein Daten lieber in Oracle Object Storage oder AWS S3 Bucket ablegen können möchte der ist in diesem Vortrag genau richtig.

Speakers
avatar for Christian Kuemmel

Christian Kuemmel

Project Manager, Senior Software Consultant, MicroStream Software GmbH
Projektleiter, Senior Software Consultant 12 Jahre im Java Umfeld tätig 8 Jahre Erfahrung im Umgang mit Hibernate Seit ca. 2 Jahren bei MicroStream


Tuesday October 5, 2021 14:00 - 15:00 CEST
#5 Low-Code

14:00 CEST

Tests mit Docker #Testcontainers #slideless
Docker und Testcontainers haben das Erstellen von Integrationstests revolutioniert. Nie war es so einfach, realitätsnahe Datenbanken mit Testdaten, ausgewachsene Browser oder andere Infrastruktur in seine Tests zu integrieren. Für die meisten Systeme stehen fertige Container bereit, öffentliche und private Registries erleichtern die Verteilung, und auf dem ausführenden Rechner müssen nur Java- und Docker-Installationen vorhanden sein. In diesem Vortrag werden die Datenbank- und Browsertests einer Spring-Boot-Anwendung von einer H2-Datenbank und einem lokalen Browser auf Docker-Container umgestellt und dabei die wichtigsten Features von Testcontainers vorgestellt.

Speakers
avatar for Stefan Hildebrandt

Stefan Hildebrandt

Agile Developer, Freelancer
Stefan Hildebrandt ist als Softwareentwickler und Berater seit zehn Jahren in größeren Projekten tätig. Neben der Entwicklung der Software kümmert er sich auch um Test- und Deployment-Automatisierung. Sein Interesse gilt vermehrt der ganzheitlichen Betrachtung des Softwareentwicklungsprozesses... Read More →


Tuesday October 5, 2021 14:00 - 15:00 CEST
#2 Main EN/DE

14:00 CEST

Building Complex Apps with plain Web Components
Is it viable to implement complex applications without any JavaScript frameworks? After introducing the basics at JCON 2020, now it's time to focus on state management, component communication, routing, structure, unidirectional data flow, and structure for plain Web Components, plain CSS and plain, modern JavaScript. Your questions are highly appreciated.

Speakers
avatar for adam bien

adam bien

consultant, adam-bien.com
Developer (Architect), Consultant, Trainer (https://airhacks.io), Podcaster (https://airhacks.fm) and Java enthusiast Adam Bien (https://adambien.blog) uses Java since JDK 1.0 and JavaScript since LiveScript and still enjoys writing code. Adam regularly organizes Java / Web / Architectures... Read More →


Tuesday October 5, 2021 14:00 - 15:00 CEST
#1 Main EN only

14:00 CEST

Live coding: Configuring your cloud-native applications with MicroProfile Config
You might have heard of 12Factor about externalising your configuration for your Cloud Native Applications. How? Come to this session to find out. The live demo will showcase various ways to configure your microservices via the amazing features introduced in MicroProfile Config 2.0, including config profile, config properties, variable replacement and many more.

Speakers
avatar for Emily Jiang

Emily Jiang

Liberty Cloud Native Architect and Chief Advocate, IBM
Emily is a Java Champion, Liberty Cloud Native Architect and Chief Advocate in IBM. She is a MicroProfile guru and has been working on MicroProfile since 2016 and leads a number of specifications including MicroProfile Config, Fault Tolerance and help with many other specs. She is... Read More →


Tuesday October 5, 2021 14:00 - 15:00 CEST
#3 Java Cloud Native

14:00 CEST

Which JVM Version are you using and why is it still Java 8?
These simple questions can reveal a lot about your software development process. So, this talk is not about the features of an specific Java Version nor a comparison among different Java releases but rather about the path to the holy grail of software: feedback based development. What is that exactly? How can you reach such a high stage of software development? What are the common pitfalls? How can you tackle them? Do you really need to do feedback based development? All of these topics and more will be discussed in this talk.

Speakers
avatar for Carlos Barragan

Carlos Barragan

Chief Technologist, Novatec GmbH
Carlos works as Chief Technologist at Novatec GmbH. His main task is helping customers with their journey to real agile software development. He also likes to code and to deploy features in production.


Tuesday October 5, 2021 14:00 - 15:00 CEST

14:00 CEST

Why a Diverse Team is Crucial to Startup Success
Team diversity refers to differences between members of startup team. Those differences can include demographic differences (like age, race, sex, ethnicity), personality (extrovert, introvert, and differing Myers-Briggs types) and functional (as in skill sets, like engineering, design, copywriting, and marketing). How does team diversity impact your customers' experience from the moment they learn about you through their journey with you? You will attract and relate to customers how look like you. They will understand your messaging and you will understand their needs. If you don't represent the right dimensions of diversity, you are leaving an amazing experience behind.

Speakers
avatar for Melissa Jurkoic

Melissa Jurkoic

CXO/Cofounder, addapptation/Diversify Thinking
Melissa has worked in the tech industry for over 20 years in roles ranging from Junior Software Engineer to her current role as the Chief Customer Experience Officer at addapptation. She holds a Bachelor’s in Computer Science from the University of New Hampshire and an executive... Read More →


Tuesday October 5, 2021 14:00 - 15:00 CEST
#4 Agile & Culture

15:00 CEST

Keynote MicroStream - Azul
Speakers
avatar for Simon Ritter

Simon Ritter

Deputy CTO, Azul
Simon Ritter is the Deputy CTO of Azul Systems. Simon has been in the IT business since 1984 and holds a Bachelor of Science degree in Physics from Brunel University in the U.K. Simon joined Sun Microsystems in 1996 and started working with Java technology from JDK 1.0; he has spent... Read More →
avatar for Markus Kett

Markus Kett

CEO, MicroStream Software GmbH
Markus has been working with Java since 20 years. Markus is co-founder and CEO at MicroStream, editor in chief for the free JAVAPRO magazine in Germany, co-organizer of the Java conference JCON in Duesseldorf, and well known as editor and speaker at many developer conferences and... Read More →


Tuesday October 5, 2021 15:00 - 16:00 CEST
#1 Main EN only

16:00 CEST

RapidClipse Fragen und Antworten
Unsere traditionelle Q&A Session mit dem RapidClipse Team geht in die nächste Runde.

Nach den ganzen Inputs zu RapidClipse über den Tag interessiert uns an dieser Stelle was euch bewegt. Bringt eure Fragen, Vorschläge und Ideen mit in diese Session!

Stellt eure Fragen, äußert eure Wünsche und wir versuch sie zu beantworten und schreiben fleißig mit welche Ideen es gibt.

Wir freuen uns auf den Austausch mit euch! 

Speakers
avatar for Sebastian Späth

Sebastian Späth

MicroStream Software GmbH
Als Senior Java Developer habe ich bei MicroStream in verschiedenen Projekten gearbeitet. In knapp 10 Jahren habe ich fast alle Stationen durchlaufen und mir dabei jede Menge unterschiedliches Know-how aneignen können. Über das tagtägliche Lösen technischer Support-Fälle, unzähliger... Read More →
avatar for Christian Kuemmel

Christian Kuemmel

Project Manager, Senior Software Consultant, MicroStream Software GmbH
Projektleiter, Senior Software Consultant 12 Jahre im Java Umfeld tätig 8 Jahre Erfahrung im Umgang mit Hibernate Seit ca. 2 Jahren bei MicroStream
avatar for Richard Fichtner

Richard Fichtner

CEO, XDEV Software GmbH
Richard Fichtner is a passionate Java developer with more than 15 years of experience in the software industry. He is involved in the open-source community to spread knowledge about Java technologies. He speaks at conferences such as Oracle Code / JavaOne / JCON / Clean Code Days... Read More →


Tuesday October 5, 2021 16:00 - 17:00 CEST
#5 Low-Code

16:00 CEST

Howto: Options Galore to Get from Source Code to Container
A typical workflow in a modern software dev project can look like: Build code, put built artifact into container image, put container image into registry, deploy to Kubernetes. Each step has it’s own requirements and pitfalls alike. The overall goal is most often to bake those steps into easily repeatable pipelines and enable a high degree of automation and standardisation. Dockerfiles seems to be the choice with the highest adoption when it comes to containerizing code artifacts. However there are options, which might remove some of the pitfalls and standardize the entire process even more. The talk will give deeper insights by comparing (multi-stage) Dockerfiles to Cloud-Native Buildpacks (buildpacks.io/paketo.io) and Google’s JIB under the evaluation criteria of build time, build size, standardisation, robustness and security. The examples and live demo will have certain focus on Java-based frameworks (Spring Boot, Quarkus, Java EE), but coverage of other languages will also be included and highlighted. The intended take-away of the session is a better overview of container building and deployment options along with understanding of requirements, advantages and drawbacks.

Speakers
avatar for Matthias Haeussler

Matthias Haeussler

Chief Technologist, Novatec Consulting GmbH
Matthias Haeussler is Chief Technologist at NovaTec Consulting and the organizer of the Stuttgart Cloud Foundry Meetup. He advises clients on Cloud strategies and supports implementations and migrations. Besides that he teaches Cloud Native Development at universities. Prior to that... Read More →


Tuesday October 5, 2021 16:00 - 17:00 CEST
#2 Main EN/DE

16:00 CEST

Programming for Accessibility
My life is a hilarious roller coaster of miss-intended programming bugs because at 120 cm tall and 50 kilograms I completely fall off your radar. Why did my scale call me! Why does facial recognition see me as a child? These are all valid questions I often ask myself as I navigate my weird and different world. Have you heard the phrase “You have to be this tall for Micro-services”? well what about: “You have to be this tall to operate a mobile phone?”. I am finding it harder and harder to reach any button except for “#” and “9”. Building accessibility into the planning stages of programming can eliminate barriers for participation and create an inclusive environment for people with disabilities. Programming for diversity serves as an unquestionable indicator that your software embraces the diversity of your users and cares about their safety and comfort. Join me on a fascinating and thought-provoking look at how you can program for accessibility.

Speakers
avatar for Rory Preddy

Rory Preddy

Microsoft Developer Advocate, Microsoft
Rory works in the Developer Relations team at Microsoft as a Senior Cloud Advocate. Cloud Advocates use their deep research skills to help professional cloud developers discover and successfully use Microsoft’s platforms. A seasoned speaker whose talks are both meaningful and humorous... Read More →


Tuesday October 5, 2021 16:00 - 17:00 CEST
#4 Agile & Culture

16:00 CEST

Ultra-fast Java In-Memory Database Apps & Microservices with MicroStream
MicroStream is a fundamentally new persistence framework for storing complex Java object graphs natively, which means the object graph is stored on disk as it is in RAM. Vice versa it allows you to load any single subgraph on-demand that is then merged with your object graph in ram automatically. This leads to fantastic benefits: You can use object graphs as an in-memory database. An object graph is a powerful multi-model data structure. You can use any Java type, collections, and formats like JSON. Matching this, Java provides the perfect query language. With Java Streams, searching even huge object graphs will take only microseconds - up to 1000x faster than comparable SQL queries and even much faster than reading data directly from a local cache. DB-specific data structures or formats become meaningless for Java. No more expensive mappings. No more data-type conversion. No more DB-specific query language. Only one data model: Java classes (POJOs). No additional caching framework required. No more inconvenient object copies. Simple architecture and type-safe query code. Core-Java only instead of DB-specific concepts. As an end result, you will get out an ultra-fast Java in-memory database app or microservice. MicroStream is in productive use for more than 5 years and becomes now open source and part of the popular microservice frameworks Helidon and Open Liberty.

Speakers
avatar for Markus Kett

Markus Kett

CEO, MicroStream Software GmbH
Markus has been working with Java since 20 years. Markus is co-founder and CEO at MicroStream, editor in chief for the free JAVAPRO magazine in Germany, co-organizer of the Java conference JCON in Duesseldorf, and well known as editor and speaker at many developer conferences and... Read More →


Tuesday October 5, 2021 16:00 - 17:00 CEST
#1 Main EN only

16:00 CEST

When Quarkus Meets MicroProfile
In this talk I introduce Quarkus and MicroProfile, and then I develop, from scratch, a few microservices talking to each other using REST and Kafka.

Speakers
avatar for Antonio Goncalves

Antonio Goncalves

Developer, AGoncal Consulting
I am a senior developer living in Paris. I evolved in the Java EE landscape for a while and then moved on to Spring, Micronaut and Quarkus. From distributed systems to microservices and the cloud, today I help my customers to develop the architecture that suits them the best. Aside... Read More →


Tuesday October 5, 2021 16:00 - 17:00 CEST
#3 Java Cloud Native

17:00 CEST

How the SRE fit´s into the DevSecOps World?
DevOps and SRE seem to be two approaches to the same obstacle. Both approaches aim to close the gap between development and operations teams, with the unified goal of optimizing the production and operation cycle without compromising its efficiency and effectiveness. Both titles coexist in the same room and are an integral part of the development team. How do they differ, and what does each one mean? And how can the topic of security be established in such a constellation?

Speakers
avatar for Sven Ruppert

Sven Ruppert

Dev Advocate, JFrog
Sven Ruppert has been coding Java since 1996 in industrial projects, is working as a Developer Advocate for JFrog. He is regularly speaking at Conferences worldwide and contributes to IT periodicals, as well as tech portals. He was working for over 15 years as a consultant worldwide... Read More →


Tuesday October 5, 2021 17:00 - 18:00 CEST
#4 Agile & Culture

17:00 CEST

Java Virtual Threads
Java wird in naher Zukunft ein alternatives Concurrency-Modell zur asynchronen Programmierung erhalten (Projekt Loom). Das Kernkonzept sind sogenannte virtuelle Threads, die von der JVM und nicht vom Betriebssystem koordiniert werden. Virtuelle Threads sind leichtgewichtig und können quasi in fast beliebiger Anzahl erzeugt und verwaltet werden. In dem Vortrag werden die bis jetzt ausgearbeiteten neuen Sprachkonzepte erläutert und Anwendungsfälle diskutiert. Wir werden besprechen, wann der Einsatz virtueller Threads sinnvoll ist und in welchen Fällen eher auf herkömmliche Threads zurückgegriffen werden sollte.

Speakers
avatar for Jörg Hettel

Jörg Hettel

Professor, Hochschule Kaiserslautern
Jörg Hettel war als Berater bei nationalen und internationalen Unternehmen tätig. Er begleitete zahlreiche Firmen bei der Einführung von objektorientierten Technologien und übernahm als Software-Architekt Projektverantwortung. Seit 2003 ist er Professor an der Hochschule Kaiserslautern... Read More →


Tuesday October 5, 2021 17:00 - 18:00 CEST
#2 Main EN/DE

17:00 CEST

XDEV Swing Builder Community Session
XDEV Swing Builder ist eine Rapid-Application-Development / Low-Code IDE für Java Swing. Diese Session richtet sich an alle Anwender der XDEV IDE und alle die Java Swing Anwendungen betreiben.

Mit Java Swing wurden seit 1998 unzählige Anwendungen entwickelt. Viele davon sind heute noch in Betrieb. Die Veränderungen im Java Ökosystem in den letzten Monaten haben es erstmalig in 20 Jahren notwendig gemacht Swing Anwendungen anzupassen. Mit minimalen Änderungen laufen Swing Anwendungen auch unter Java 17 und Windows 11. Wir zeigen euch was wir getan haben, damit eure Anwendungen weiterlaufen.

Wir bringen euch auf den aktuellen Stand und geben einen Ausblick wie die Roadmap aussehen könnte. Dazu wollen wir eure Meinung hören. Was würde euch am meisten helfen? Welche Dinge sollten wir auf die Roadmap packen?

Wir freuen uns auf den Austausch mit euch!

Speakers
avatar for Richard Fichtner

Richard Fichtner

CEO, XDEV Software GmbH
Richard Fichtner is a passionate Java developer with more than 15 years of experience in the software industry. He is involved in the open-source community to spread knowledge about Java technologies. He speaks at conferences such as Oracle Code / JavaOne / JCON / Clean Code Days... Read More →



Tuesday October 5, 2021 17:00 - 18:00 CEST
#5 Low-Code

17:00 CEST

10 Design Tips for Java MicroServices Developers
At the intersection of science, art, patterns, and methods, Design 4 Developers (Design4Developers.io) gives you practices and patterns for creating better microservices that are simpler to test, write, and deploy. Developers spend a great deal of time writing software for consumption by humans, but don’t necessarily consider humans in the process. In this session, we'll use specific Java Examples and overlay them with a focus on human-centered technology needs. These needs are universal to all of us as humans and transcend any technical choice. Being aware of these needs will ultimately make you a better developer no matter what kind of development you do. We'll discuss: - How to compliment your development and deployment efforts with human considerations using the 5Es (Entice, Enter, Engage, Exit, and Extend) to design compelling MicroServices experiences - How to overlay them with the 9 principles of “The SaaS-Ment” to identify typical friction with MicroServices creation.

Speakers
avatar for Jim Tyrrell

Jim Tyrrell

Senior Principal Solutions Architect, Red Hat
Jim Tyrrell founded Design 4 Developers an Open Community targeting the intersection of Design and Software Development. Jim is a 25 year Java veteran, who has spent more than a decade thinking about how Design intersects with Software Development. To further his skills in Design... Read More →


Tuesday October 5, 2021 17:00 - 18:00 CEST
#1 Main EN only

17:00 CEST

Logging and Testing with Helidon
Testing and logging are widely used across every application. In the first part of my presentation, we will take a look at how to easily use Mapped Diagnostic Context (MDC) with different logging frameworks such as java.util.logging (JUL) framework, SLF4J etc. The second part of my presentation is about the newly implemented features to simplify testing of your applications in Helidon environment.

Speakers
avatar for David Král

David Král

Java developer, Oracle
David Král works on project Helidon at Oracle, with more than 5 years of experience in developing Enterprise Java components. Active open source contributor mainly to project Helidon but also contributing to various related Jakarta EE projects such as Jakarta JSON-B, Yasson and Jersey... Read More →


Tuesday October 5, 2021 17:00 - 18:00 CEST
#3 Java Cloud Native

18:00 CEST

Keynote | What Would a Startup Do?
Speakers
avatar for adam bien

adam bien

consultant, adam-bien.com
Developer (Architect), Consultant, Trainer (https://airhacks.io), Podcaster (https://airhacks.fm) and Java enthusiast Adam Bien (https://adambien.blog) uses Java since JDK 1.0 and JavaScript since LiveScript and still enjoys writing code. Adam regularly organizes Java / Web / Architectures... Read More →


Tuesday October 5, 2021 18:00 - 19:00 CEST
#1 Main EN only

19:00 CEST

Moderne Softwarearchitekturen dokumentieren und kommunizieren
Unsere Software-Projekte werden immer größer und komplexer. Technologisch hat sich in den vergangenen Jahren eine Menge getan, um diese Komplexität in den Griff zu bekommen. Aber noch viel wichtiger ist die Kommunikation zwischen allen Projektbeteiligten geworden. Als Voraussetzung braucht es dafür eine möglichst aktuelle, pragmatische und zielführende Dokumentation der Softwarearchitektur. Aber leider hat das Dokumentieren häufig einen niedrigen Stellenwert in unseren Projekten. Zum Teil fehlt die Motivation bei den Verantwortlichen. Oder suboptimale Werkzeuge wie Textverarbeitung, schwergewichtige UML-Tools bzw. Wikis ersticken alle Bemühungen im Keim. Wir wollen den Bann brechen und an konkreten Beispielen zeigen, wie Dokumentieren nicht nur Spaß machen, sondern auch leicht von der Hand gehen kann. Dazu berichten wir aus unseren Erfahrungen und rücken leichtgewichtige Tools und schlanke Text- bzw. Grafikformate in den Fokus. Sie erleichtern die automatisierte Erstellung einer effektiven, allumfänglichen und vor allem redundanzfreien Dokumentation, die sich mit wenig Aufwand für die unterschiedlichen Zielgruppen optimiert in verschiedenen Formaten ausliefern lässt. Das Einbetten dieser Documentation as Code in die Entwicklungs- und Reviewprozesse ermöglicht zudem eine gute Nachvollziehbarkeit und die kontinuierliche Verbesserung und Weiterentwicklung.

Speakers
avatar for Ralf D. Müller

Ralf D. Müller

Software Engineering Advocate, DB Systel GmbH
Ralf is a Software Engineering Advocat at DB Systel during the day and after sunset he loves everything whit bits and bytes. The last few years of his career, he focused on the documentation of software systems with arc42 and the Docs-as-Code approach.You can follow him on twitter... Read More →
avatar for Falk Sippach

Falk Sippach

Software-Architekt, embarc Software Consulting GmbH
Falk Sippach ist bei der embarc Software Consulting GmbH als Softwarearchitekt, Berater und Trainer stets auf der Suche nach dem Funken Leidenschaft, den er bei seinen Teilnehmern, Kunden und Kollegen entfachen kann. Bereits seit über 15 Jahren unterstützt er in meist agilen Softwareentwicklungsprojekten... Read More →


Tuesday October 5, 2021 19:00 - 20:00 CEST
#2 Main EN/DE

19:00 CEST

A Freakonomic Take on Open Standards and Jakarta EE
Words like standard, de-facto, de-jure and open are frequently used and abused in our industry. The reality is that few people really understand what these words actually mean or how these ideas effect their own professional lives in the long and short term. This session aims to clear the air on some of these terms and outline why open standards like Jakarta EE are critically important to you today and in the future. We will explore these concepts in the context of well-established economic theories on competition, monopoly power, the network effect, innovation, open source and open standards - in true Freakonomist style!

Have a look at the Session Teaser! ​​​

Speakers
avatar for Reza Rahman

Reza Rahman

Principal Program Manager, Microsoft
Reza Rahman is Principal Program Manager for Java on Azure at Microsoft. He works to make sure Java developers are first class citizens at Microsoft and Microsoft is a first class citizen of the Java ecosystem.Reza has been an official Java technologist at Oracle. He is the author... Read More →


Tuesday October 5, 2021 19:00 - 20:00 CEST
#1 Main EN only

19:00 CEST

Bridging the Gap Between Ops and Developers with CI/CD
Software development has changed dramatically in recent years; no longer can you afford to say, “That’s how we’ve always done it.” Applications are evolving rapidly, which requires you to move fast and fix things. And don’t neglect the cultural shift inherent in any technical change. (Some developers, for instance, reject build-break notifications, going so far as removing themselves from the email list.) If you’re just starting your CI/CD journey, you must ensure everyone understands the benefits, including increased speed-to-market, stable builds, and reduced drama around releases. That way, CI/CD won’t just help you deliver for your customers—it will help you sleep better at night.

Speakers
avatar for Nathaniel Schutta

Nathaniel Schutta

Software Architect, Pivotal
Nathaniel T. Schutta is a software architect focused on cloud computing and building usable applications. A proponent of polyglot programming, Nate has written multiple books and appeared in various videos. Nate is a seasoned speaker regularly presenting at conferences worldwide... Read More →


Tuesday October 5, 2021 19:00 - 20:00 CEST
#5 Low-Code

19:00 CEST

Building Futureproof APIs with Spring HATEOAS
We've all built APIs. But how many times have we had to make changes? Add new features. Learn how to build APIs that don't end up costing a fortune in time and effort.

Speakers
avatar for Greg Turnquist

Greg Turnquist

Principal Developer, VMware
Greg L. Turnquist works on the Spring team as a principal developer at VMware. He is a committer to Spring HATEOAS, Spring Data, Spring Boot, R2DBC, and Spring Session for MongoDB. He hosts "Spring Boot Learning", the YouTube channel where you learn about Spring Boot and have doing... Read More →


Tuesday October 5, 2021 19:00 - 20:00 CEST
#3 Java Cloud Native

19:00 CEST

Scaling DevOps across Organization
DevOps has become the industry-wide standard for accelerating an organization's efficiency. However, getting your feet in, and rolling it out across the horizons of your organization is easier said than done! Adopting DevOps is one thing while scaling it across the verticals of the organization is another which often becomes a harder job. It requires deep influencing, cultural transformation and driving mass behavior. As that has a human element in it, often the journey of DevOps adoption at an organization faces challenges. Driving the change at the scale that involves People, Process and Tools would be the focus of this session. Let's look at some of the fundamental challenges of this journey and how to counter them with age-old concepts of leadership and cultural transformation.

Speakers
avatar for Himanshu Patel

Himanshu Patel

Head of Middleware Engineering, Aventiv Technologies
Digital Transformation Leader, Passionate Technologist and Yoga Enthusiast - Formally, Head of Middleware Engineering at Aventiv. Help organizations transform into a new era of building software systems for increased efficiency, quality & predictability while reducing the cost. Outstanding... Read More →


Tuesday October 5, 2021 19:00 - 20:00 CEST
#4 Agile & Culture

20:00 CEST

JDK 17 - The new LTS Release arrived in the Jungle
Seit dem Jahr 2018 erscheinen die künftigen Java- Feature-Releases alle 6 Monate. Das JDK 11 wurde als Long-Term-Support-Release (LTS-Release) im September 2018 veröffentlicht und im Rhythmus von sechs Monaten folgten weitere JDK-Versionen und im September 2021 wurde das nächsten LTS-Release JDK 17 freigegeben. Mit dem zeitlichen Abstand von sechs Monaten bekommen die Entwickler wesentlich schneller neue Java-Funktionsmerkmale als dies mit dem bisherigen Dreijahreszyklus der Fall war. Zwischen den JDK-Feature-Releases sind zwei Updates geplant, bei denen es um die Wartung und Bugfixes geht, die wie gewohnt, jeweils im Januar, April, Juli und Oktober eines Jahres als Java Critical Patch Update erscheinen werden. Die Planung sieht vor, jeweils alle drei Jahre ein weiteres Java-LTS-Release zu veröffentlichen, damit der Anwendungsbetrieb eine stabile und ausgereifte Java-Basis bekommt, die mit der nachfolgenden Versionierung $FEATURE.$INTERIM.$UPDATE.$PATCH gekennzeichnet wird. Im Vortrag werden die Merkmale von Java und dem JDK 17 besprochen, sowie Empfehlungen diskutiert, wie die künftige Java-Strategie mit dem Java SE Subscription Support für die Entwickler und für den Anwendungsbetrieb aussehen soll.

Speakers
avatar for Wolfgang Weigend

Wolfgang Weigend

oracle solution engineer Java & GraalVM technology, ORACLE Global Services Germany GmbH
Wolfgang Weigend arbeitet als Master Principal Solution Engineer bei der ORACLE Global Services Germany GmbH im weltweiten Java Team. Er beschäftigt sich mit Java-Technologie, GraalVM und Architektur für unternehmensweite Anwendungsentwicklung.


Tuesday October 5, 2021 20:00 - 21:00 CEST
#2 Main EN/DE

20:00 CEST

Micro-services for a Billion people
The food wastage in India is 70 tonnes per year, and there is mismanagement at several layers. Approximately 20-30% of the wastage happens in the last mile, between wholesale traders, and retail mom-and-pop stores. Is there something we can do about it? This was the problem statement I attempted to solve as a first engineering hire at a startup. Our customers were 12.8 million retail owners that deal in FMCG (Fast-moving consumer goods, such as food grains, tooth paste, etc). The goal was to develop a platform for retail traders (mom and pop shop owners / SMBs) to buy FMCG products from wholesale traders using an Android app. For a section of the population which is not very well versed with smartphones and technology, the user experience had to be designed from the ground up to be multi-lingual, fungible, unstructured, and relevant. In this talk, I cover how we went about iterating the solution from a simple SMS based system to a full fledged app backed by micro-services written in Java. Having a micro-service architecture provided us the agility to experiment and iterate quickly, and we were able to push out changes much faster, and help solve wastage problems even sooner. I will discuss the several problems we faced in this segment with regards to unstructured data, and how our data models had to adapt. We used cloud services extensively, so I will also cover how different pieces came together in a cogent form to build better experience for our customers.

Speakers
avatar for TEJAS CHOPRA

TEJAS CHOPRA

Senior Software Engineer, Netflix, Inc.
Tejas Chopra is a Senior Software Engineer, working in the Data Storage Platform team at Netflix, where he is responsible for architecting storage solutions to support Netflix Studios and Netflix Streaming Platform. Tejas is an International Keynote Speaker and periodically conducts... Read More →


Tuesday October 5, 2021 20:00 - 21:00 CEST
#1 Main EN only

20:00 CEST

You are Moldable, Yes? : But, how to NOT leave all the molding to others to thrive !
Do you often feel blocked / limited in our ability to take big / small decisions at work because you are afraid of conflict ? Does the fear of failure make you feel powerless, nervous or mindless? If you answered Yes to these questions, you are not alone. These barriers are making us followers of the herd rather than explorers who define their own path to success. In this era, the “how to” is getting misconstrued as “have to”. We all know that out of box thinking is a highly valued competence that is deeply sought in all fields to attain exponential growth. But it also is truly exhausting to be different from others at the table, so why not just comply? Isn't the mold there for a reason? Learn about tools to identify, self-examine, strategize and break the mold leading yourself to new horizons and own your success. This talk is intended for students, early and mid-career or anyone who are looking to be self and situationally aware to follow their passion and grow as leaders.

Speakers
avatar for Sneha Singla

Sneha Singla

Director, Engineering, salesforce
Sneha Singla is a Director of Engineering at Salesforce. She has been in the tech industry for 16 years and has worn various hats of a Developer, Technical Lead, Scrum master and currently an Engineering Manager. She is a first-generation immigrant and is passionate about bringing... Read More →


Tuesday October 5, 2021 20:00 - 21:00 CEST
#4 Agile & Culture
 
Wednesday, October 6
 

09:00 CEST

Die Sicherheitstest-Pyramide für Entwickler
Die Testpyramide von Mike Cohn ist den meisten Entwicklern bekannt und wird innerhalb der testgetriebenen Entwicklung in Projekten eingesetzt. Aber beinhaltet die Testpyramide auch Prüfungen der Anwendungssicherheit? Kontinuierliche Anwendungssicherheit wird immer wichtiger, vor allem im Kontext der agilen Entwicklung und Continuous Delivery. Das heute noch praktizierte Muster der Penetrationstests kurz vor dem Produktivgang funktioniert nicht mehr. Stattdessen muss die Sicherheit für jedes Inkrement immer wieder aufs Neue überprüft werden. Aus diesem Grund werden wir in diesem Talk die gesamte Testpyramide aus der Sicherheitsperspektive betrachten. Wir werden sehen, wie man das Sicherheitsniveau in Anwendungen verbessern kann, indem man effektive Sicherheitstests auf jeder Ebene der Pyramide hinzufügt. So ist es möglich, einen großen Teil der OWASP Top 10 Sicherheitskategorien automatisch abzudecken. Dies wird anhand von Live-Demos mit automatisierten Tests u.a. für Authentifizierung, Autorisierung, Eingabevalidierung und SQL-Injections auf Basis einer mit Spring Boot und Java implementierten Backend-App veranschaulicht.

Speakers
avatar for Andreas Falk

Andreas Falk

Lead of Agile Security, Novatec Consulting
Andreas Falk has been working in enterprise application development projects for more than twenty years. Currently, he is working as a managing consultant for Novatec Consulting, located in Germany. In various projects, he has since been around as an architect, coach, and developer... Read More →


Wednesday October 6, 2021 09:00 - 10:00 CEST
#2 Main EN/DE

09:00 CEST

Building a typical Spring Cloud architecture application
As companies have moved their workloads to the cloud, we’ve seen a growth in the use of cloud-native architectures, particularly microservices. Microservice-based architectures help improve scalability and velocity but implementing them can pose challenges. In this session, you will learn how Spring Cloud helps you mitigate these!

Speakers
avatar for Timo Salm

Timo Salm

Specialist Solution Engineer VMware Tanzu, VMware Inc.
Timo Salm is based out of Stuttgart in the south-west of Germany. He started to work for Pivotal as a Platform Architect in 2019 and is now part of VMware Tanzu. Before Timo joined Pivotal, he worked for more than seven years for consulting firms in the automotive industry as a software... Read More →


Wednesday October 6, 2021 09:00 - 10:00 CEST
#3 Java Cloud Native

09:00 CEST

Building GraphQL APIs with Java
Efficient data exchange and easy development at the same time – all this is promised by the GraphQL query language! A core idea of GraphQL is that clients can select themselves, depending on the use case, which data they request from a server and thus hopefully never read too little or too much data in a request. After a short introduction to the basics of GraphQL, I will show you how to implement a GraphQL API for your own application. We will look at the basic problems that need to be solved, which GraphQL frameworks exist for Java, how they work and what their particularities are.

Speakers
avatar for Nils Hartmann

Nils Hartmann

Software Developer and Trainer (Freelancer), Freelancer
Nils Hartmann is a freelance software developer, architect, trainer and coach from Hamburg.He programs in Java and JavaScript/TypeScript and supports teams with training and consulting when starting and moving into web development and working with React, TypeScript and GraphQL. Nils... Read More →


Wednesday October 6, 2021 09:00 - 10:00 CEST
#1 Main EN only

09:00 CEST

Effective Design of RESTful APIs.
Developers creating websites and especially backend developers need to know how to build RESTful APIs correctly and effectively. As nowadays those APIs is serving many channels either it is Mobile, Microservices components, IoT, integration or all of them. This session will help you plan and model your own APIs and understand the six REST design constraints that help guide your architecture. I will start with a simple overview, including advice on identifying the users or "participants" of your system and the activities they might perform with it. I'll help you to paper test your model, validating the design before you build it, provided with a live example to clear up the concept. You'll then explore the HTTP concepts and REST constraints needed to build your API. Topics include: The three approaches to adding an API, modeling tips, Creating and grouping API methods, Mapping activities to verbs and actions, validating your API, working with HTTP headers and response codes, Caching, Layered systems, Creating a uniform interface. All those explanations topics will be provided by examples to clear up the idea and demonstrate the concept.

Speakers
avatar for Mohamed Taman

Mohamed Taman

Chief Solutions Architect, Effortel
Adopts Java SE.next(), JakartaEE.next(), a JCP member, Was JCP Executive Committee member, JSR 354, 363 & 377 Expert Group member, EGJUG leader, Oracle Egypt Architects Club board member, speaks Java, love Mobile, Big Data, Cloud, Blockchain, DevOps. An International speaker, 4 books... Read More →


Wednesday October 6, 2021 09:00 - 10:00 CEST

09:00 CEST

Loosely or lousily coupled? Understanding communication patterns in microservices architectures
In a microservices architecture, services shall be as loosely coupled as possible. Still, they need to communicate with each other in order to fulfill business requirements. Now there are so many questions around this communication: - What are the general possibilities to communicate? For example synchronous, asynchronous, or event-driven communication. What are the tradeoffs and which communication style should you prefer? - What is the influence on the coupling of your services? For example, asynchronous communication reduces temporal coupling between services. - What do I have to consider when selecting a certain communication style? For example, you need to apply certain resilience patterns if you want to use synchronous communication. This talk will help you answer these questions for your project. You will better understand not only the architectural implications but also the effect on the productivity of your teams.

Speakers
avatar for Bernd Ruecker

Bernd Ruecker

Co-Founder and Chief Technologist, Camunda
I am a software developer at heart who has been innovating process automation deployed in highly scalable and agile environments of industry leaders such as T-Mobile, Lufthansa, ING, and Atlassian. I contributed to various open-source workflow engines and I'm the Co-Founder and Chief... Read More →


Wednesday October 6, 2021 09:00 - 10:00 CEST
#5 Architecture

09:00 CEST

The emergence of APM in cloud application development
As the clouds turn more practical in the current times, cloud providers are exploring many possible solutions to bring the workloads onto their cloud. One of the key concerns for every customer is their application monitoring after they move to the cloud. This is where the concept of "Application, Performance & Monitoring" (APM) turns out to be very important however challenging for any cloud solutions. This session will take you through the deep dive of APM/observability, and how it can be deployed in a cloud environment with the same ease as on-prem using Instana.

Speakers
avatar for vipin menon

vipin menon

Software Developer, APM, IBM
I have 8 years of experience in software industry with multitude of technologies. My expertise lies in debugging Java problems under various domains like security, webservices, XML, JAXB/JAXWS and ORB. I have experience in working with various web technologies like react, nodejs and... Read More →


Wednesday October 6, 2021 09:00 - 10:00 CEST
#4 Cloud Platforms

10:00 CEST

Web-Anwendungen mit RapidClipse in Rekordzeit entwickeln
RapidClipse X ist eine visuelle Java Entwicklungsumgebung für die schnelle und effiziente Entwicklung individueller Business-Applikationen für den professionellen Einsatz in Unternehmen. Mit RapidClipse X lassen sich moderne Web-Oberflächen auf Basis des neuen Web-Components-Standards bequem mit der Maus designen. UI-Designer brauchen dafür keinerlei Programmierkenntnisse und spätere Änderungen sind unkompiziert. Vor allem bei Projekten mit hohem UI-Anteil, lassen sich Entwicklungszeit und kosten um bis zu 90% einsparen. Der generierte Code besitzt eine hohe Qualität und ist vor allem immer gleich. UI-Code selber zu schreiben ist daher nicht mehr wirtschaftlich. RapidClipse ist seit 2014 auf dem Markt und wird von vielen Unternehmen wie der Allianz SE für die Entwicklung datengetriebener Geschäftsanwendungen eingesetzt. Nachdem im vergangenem Jahr mit RapidClipse X ein vollständig neuer UI-Builder auf Basis von Web-Components dazu kam, lag der Fokus in den letzten 12 Monaten auf der Datenbankprogrammierung und Performance. Mit MicroStream bietet RapidClipse jetzt eine neues Persistenz-Framework und Alternative zur komplizierten Hibernate-Programmierung, mit der sich hochperformante In-Memory-Datenbankanwendungen entwickeln lassen. Datenbankankzugriffe werden mit MicroStream bis zu ungaubliche 1000 Mal schneller ausgeführt, Anwendungen benötigen 90% weniger Rechenleistung, was die Server- und Cloud-Betriebskosten senkt und last but not least wird die Datenbankentwicklung damit stark vereinfacht, was die Produktivität steigert. Dieser Vortrag bietet einen vollständigen Überblick über die Arbeitsweise und Möglichkeiten mit RapidClipse.

Speakers
avatar for Markus Kett

Markus Kett

CEO, MicroStream Software GmbH
Markus has been working with Java since 20 years. Markus is co-founder and CEO at MicroStream, editor in chief for the free JAVAPRO magazine in Germany, co-organizer of the Java conference JCON in Duesseldorf, and well known as editor and speaker at many developer conferences and... Read More →


Wednesday October 6, 2021 10:00 - 11:00 CEST
#2 Main EN/DE

10:00 CEST

Application Configuration on AWS for Spring Boot-based applications
In this session, we will dive into how to manage externalised configuration in distributed systems deployed on AWS via AWS Systems Manager Parameter Store and AWS Secrets Manager, how to integrate their use in Spring Boot applications, as well as how to broadcast and receive configuration changes. On top, we will look at how to use AWS AppConfig to rollout such application configuration changes in a safe and validated manner for Java Microservices applications, as well as how to define it as part of Infrastructure as Code.

Speakers
avatar for Diana Cheng

Diana Cheng

Solutions Architect, Amazon Web Services
Diana Cheng is a Solutions Architect at Amazon Web Services. She has 10+ years of experience in software development and consulting. Prior to joining AWS, Diana worked as a team lead, architect, and consultant at a number of enterprise companies in different sectors.


Wednesday October 6, 2021 10:00 - 11:00 CEST
#3 Java Cloud Native

10:00 CEST

Do You Need Kubernetes or a PAAS?
Kubernetes can manage the containers that run your application more easily than if you need to handle them individually. A Platform As A Service (PAAS) solution takes away the burden to deep dive into a framework and can handle many tasks for you. Since Kubernetes has its own challenges, is a PAAS solution preferred? The answer to this question depends on your situation, of course. In this session we go a bit deeper in comparing the process of setting up a Kubernetes Cluster yourself with using a PAAS that manages it for you. We will also demonstrate the simple steps to bring your Jakarta EE application to the cloud with Payara Cloud, with no Kubernetes knowledge needed.

Speakers
avatar for Rudy De Busscher

Rudy De Busscher

Developer Advocate, Payara
Rudy loves to create (web) applications with the Jakarta EE platform and MicroProfile implementations and is currently working for Payara as Product Manager and Developer Advocate. He is active in the IT industry for more than 20 years and is a big fan of OpenSource. He is also passionate... Read More →


Wednesday October 6, 2021 10:00 - 11:00 CEST
#4 Cloud Platforms

10:00 CEST

🤖Building a Telegram bot with Apache Kafka and ksqlDB
Imagine you’ve got a stream of data; it’s not “big data,” but it’s certainly a lot. Within the data, you’ve got some bits you’re interested in, and of those bits, you’d like to be able to query information about them at any point. Sounds fun, right? Since I mentioned “querying,” I’d hazard a guess that you’ve got in mind an additional datastore of some sort, whether relational or NoSQL. But what if I told you...that you didn’t need any datastore other than Kafka itself? What if you could ingest, filter, enrich, aggregate, and query data with just Kafka? With ksqlDB we can do just this, and I want to show you exactly how. In this hands-on talk we'll walk through an example of building a Telegram bot in which ksqlDB provides the key/value lookups driven by a materialised view on the stream of events in Kafka. We'll take a look at what ksqlDB is and its capabilities for processing data and driving applications, as well as integrating with other systems.

Speakers
avatar for Robin Moffatt

Robin Moffatt

Senior Developer Advocate, Confluent
Robin is a Senior Developer Advocate at Confluent, as well as an Oracle ACE Director (Alumnus). He has been speaking at conferences since 2009 including QCon, Devoxx, Strata, Kafka Summit, and Øredev. His particular interests are analytics and systems architecture. You can find his... Read More →


Wednesday October 6, 2021 10:00 - 11:00 CEST
#5 Architecture

10:00 CEST

Understanding Raft Consensus
In this session, I will talk about how Raft Consensus works in theory by supporting live diagrams. During talk, I will also provide real life use cases about Raft Consensus.

Speakers
avatar for Hüseyin Babal

Hüseyin Babal

Senior Software Engineer, Hazelcast
Building Hazelcast Cloud to provide Hazelcast Cluster as a service with extensive features. AWS Certified DevOps Professional. Building highly scalable, real-time systems with Spring Boot, Kubernetes, Docker, Prometheus, Event-Based Systems, and Hybrid Cloud. Ex. Sony and eBay engineer... Read More →


Wednesday October 6, 2021 10:00 - 11:00 CEST
#1 Main EN only

11:00 CEST

Catch me if you can - Best Practices mit Java Exceptions
Wenn in einer Java-Anwendung ein Fehler auftritt, sollte eine Exception, eine Ausnahme, geworfen werden. Der Name sagt schon, dass dadurch ein Ausnahmefall markiert werden soll - in der Theorie. In der Praxis werden Exceptions immer wieder missbraucht und falsch eingesetzt. Außerdem gibt es da checked und unchecked Exceptions und der Unterschied zwischen den beiden ist auch vielen Programmierern nicht klar. Der Vortrag geht kurz auf die Funktionsweise von Exceptions ein, um sich dann mit dem Unterschied zwischen checked und unchecked Exceptions zu beschäftigen. Anschließend werden einige wichtige Best Practices und Architekturvorschläge für die Arbeit mit Ausnahmen vorgestellt.

Speakers
avatar for Christopher Olbertz

Christopher Olbertz

Lehrkraft für besondere Aufgaben im Bereich Informatik, Hochschule für Technik und Wirtschaft des Saarlandes
Nach meiner Ausbildung zum Fachinformatiker für Anwendungsentwicklung studierte ich Praktische Informatik an der Hochschule für Technik und Wirtschaft des Saarlandes (HTW) mit Abschluss Diplom. Anschließend arbeitete ich zwei Jahre als selbstständiger Softwareentwickler und Trainer... Read More →


Wednesday October 6, 2021 11:00 - 12:00 CEST
#2 Main EN/DE

11:00 CEST

Cloud Security in Action ! - ein Finanzdienstleister geht in die Cloud
Die Digitalisierung traditioneller Unternehmen und damit meist zwingend verbundene Modernisierung der IT macht auch vor dem Sektor der Finanzdienstleister nicht Halt. In diesem Vortrag berichtet die SüdLeasing - eine 100% Tochter einer Landesbank - von ihrem Weg von der “legacy IT” zur modernen cloud-basierten Umgebung. Aufgrund der Sensitivität der Daten lag von der ersten Sekunde ein besonderer Fokus auf dem Thema Cloud Security. Hier berichten Tamira Horn und Thorsten Jakoby von der Reise eines BaFin regulierten Finanzdienstleisters in die Cloud. Statt "das sichern wir durch eine Firewall und Netzwerke", wurden Multi-Tenant-Zero-Trust-Architekturen aufgebaut. Business Continuity und Disaster Recovery wurden voll automatisiert mit Hilfe von Terraform, Access Control Lists und Microsoft Azure aufgebaut. Wir zeigen mit Beispielen und Demo's wie wir es technisch umgesetzt haben, nicht das Rechenzentrum in die Cloud zu migrieren, sondern eine sichere und flexible Plattform zu designen, um uns auf den Weg in die Cloud vorzubereiten.

Speakers
avatar for Tamira Horn

Tamira Horn

IT Security Administrator, SüdLeasing GmbH
Tamira Horn works as an IT security administrator at SüdLeasing. Securing the company's IT infrastructure is one of her daily tasks. As an administrator for complex firewall systems, endpoint security, SIEM, as well as network segregation, she knows the infrastructure down to the... Read More →
avatar for Thorsten Jakoby

Thorsten Jakoby

Managing Consultant, Novatec Consulting GmbH
Thorsten Jakoby is a consultant for IT-Architectures and Cloud Migrations at Novatec in Germany. He is currently a cloud security architect for a highly regulated customers in Germany. With a background of more than 10 years in distributed applications Thorsten enables both customers... Read More →


Wednesday October 6, 2021 11:00 - 12:00 CEST
#4 Cloud Platforms

11:00 CEST

AOT or JIT: Faster Startup or Faster Code?
Microservices have become a prevalent architectural approach to developing applications. Moving from a monolithic application to multiple container-based services has many advantages. One of the largest is dynamic scalability; spinning up and shutting down instances of services to adapt to dynamic loads is very cost-effective in a public cloud environment. For JVM-based applications, running in a managed environment using JIT compilation, this provides additional challenges. Primarily, this is around the time required for a service to warm up and reach the optimum level of performance. To address this, we have seen various approaches such as the Graal VM and Quarkus that use an AOT approach rather than JIT compilation. In this session, we will explore the pros and cons of both approaches to help in understanding the tradeoff between initial performance and overall performance. At the end of the session, you will have a clear idea of how to approach your Java microservice design from the AOT and JIT perspective.

Speakers
avatar for Simon Ritter

Simon Ritter

Deputy CTO, Azul
Simon Ritter is the Deputy CTO of Azul Systems. Simon has been in the IT business since 1984 and holds a Bachelor of Science degree in Physics from Brunel University in the U.K. Simon joined Sun Microsystems in 1996 and started working with Java technology from JDK 1.0; he has spent... Read More →


Wednesday October 6, 2021 11:00 - 12:00 CEST
#3 Java Cloud Native

11:00 CEST

Choreography vs Orchestration in serverless microservices
We went from a single monolith to a set of microservices that are small, lightweight, and easy to implement. Microservices enable reusability, make it easier to change and scale apps on demand but they also introduce new problems. How do microservices interact with each other toward a common goal? How do you figure out what went wrong when a business process composed of several microservices fails? Should there be a central orchestrator controlling all interactions between services or should each service work independently, in a loosely coupled way, and only interact through shared events? In this talk, we’ll explore the Choreography vs Orchestration question and see demos of some of the tools that can help.

Speakers
avatar for Guillaume Laforge

Guillaume Laforge

Developer Advocate, Google
Guillaume Laforge is a developer advocate for Google Cloud, focusing on serverless technologies. He is also a Java Champion, and the co-founder of the Apache Groovy programming language project.
avatar for Mete Atamel

Mete Atamel

Developer Advocate, Google
I'm a Developer Advocate at Google, currently focused on helping developers with Google Cloud Platform. As a long-time Java and a recent C# developer, I like to compare the two ecosystems. Prior to Google, I worked at Microsoft, Skype, Adobe, EMC, and Nokia building apps and services... Read More →


Wednesday October 6, 2021 11:00 - 12:00 CEST
#5 Architecture

11:00 CEST

Framewars: the battle between NoSQL and Java in the cloud arena
This lecture's objective is to make comparisons between points and weaknesses of Java frameworks that integrate with databases. On the one hand, the NoSQL MongoDB, Redis, Neo4J, and Cassandra, and on the other, the Java frameworks that integrate with them: Spring, Quarkus, Jakarta EE, Micronaut. The arena: the cloud! In this ring, the one who best analyzes each tool's trade-offs wins in this epic battle.

Speakers
avatar for Otavio Santana

Otavio Santana

Distinguished Engineer, Zup Innovation
Empowering developers worldwide to deliver better software faster, scalable in the Cloud. Otavio is a passionate software engineer focused on Cloud and Java technology. He has experience mainly in persistence polyglot and high-performance applications in finances, social media, and... Read More →


Wednesday October 6, 2021 11:00 - 12:00 CEST
#1 Main EN only

12:00 CEST

Java 17 - Was erwartet uns in der neuesten LTS-Version?
Seit einigen Jahren kommen nun schon halbjährlich neue Java Major-Releases heraus. Dieses Vorgehen hat sich etabliert und funktioniert erstaunlich gut. Natürlich dürft Ihr nicht den Funktionsumfang von den früheren Versionen (9 und älter) erwarten. Dafür bekommt Ihr als Entwickler aber viel regelmäßiger die aktuellen Änderungen mit. In den Preview-Phasen kann sogar Feedback gegeben und somit die aktive Weiterentwicklung von Java mit gestaltet werden. Alle drei Jahre erscheinen zudem Long-Term-Support-Versionen, die länger mit Updates und Patches versorgt werden. Im September 2021 ist mit der Version 17 wieder ein solches LTS-Release herausgekommen, für welches in den letzten 3 Jahren jede Menge interessante neue Funktionen entwickelt wurden: * Switch Expressions * Text Blocks * Pattern Matching für instanceof * Helpful NullPointerExceptions * Records * Sealed Classes * und noch einiges mehr In diesem Vortrag betrachten wir außerdem hilfreiche API-Verbesserungen und Änderungen an der JVM, z. B. bei den Garbage Collectoren. Falls Ihr selbst noch nicht bei Java 11 oder höher angekommen seid, bekommt Ihr damit auch einen kompakten Überblick, wie sich Java aktuell anfühlt.

Speakers
avatar for Falk Sippach

Falk Sippach

Software-Architekt, embarc Software Consulting GmbH
Falk Sippach ist bei der embarc Software Consulting GmbH als Softwarearchitekt, Berater und Trainer stets auf der Suche nach dem Funken Leidenschaft, den er bei seinen Teilnehmern, Kunden und Kollegen entfachen kann. Bereits seit über 15 Jahren unterstützt er in meist agilen Softwareentwicklungsprojekten... Read More →


Wednesday October 6, 2021 12:00 - 13:00 CEST
#2 Main EN/DE

12:00 CEST

CAP Theorem - two decades and few clouds later
"Consistency, Availability, Partition tolerance — pick two" is both a proven theorem and a huge oversimplification. Categorizing systems as CP, CA and AP is no longer enough in the light of configurable consistency and cloud services advertising themselves as "almost CAP". What's left of this famous theorem in 2021?

Let's deep dive into the CAP theorem in a non-academic way to identify its practical implications. During the session, we will go through some modern data stores like Cassandra, Kafka & AWS S3 to identify their place in the grey area of the CAP triangle. The audience will get an overview of possible trade-offs and their consequences for not only the three original properties.

Speakers
avatar for Mike Kowalski

Mike Kowalski

Software Engineering Consultant, mikemybytes.com
Software engineer believing in craftsmanship and the power of fresh espresso. Technical blogger (mikemybytes.com) & consultant, working on a daily basis as a Software Architect. Specialized in distributed systems operating on the JVM.


Wednesday October 6, 2021 12:00 - 13:00 CEST
#3 Java Cloud Native

12:00 CEST

Demystifying the Java Flight Recorder API
This session primarily aims at providing details about how to go about using the Java Flight Recorder API. It also explains the reasons to use the JFR API over the conventional Java Logging API by highlighting the key differences between them.

Have a look at the Session Teaser!​​​

Speakers
avatar for Karan Balkar

Karan Balkar

Team Lead, LTI
Karan Balkar is a mobile application developer primarily working on Android since the past 5 years. He has also worked on Augmented reality / Virtual reality based mobile applications and is passionate about exploring new innovative technologies.


Wednesday October 6, 2021 12:00 - 13:00 CEST
#1 Main EN only

12:00 CEST

Measuring and increasing developer productivity with the help of Serverless
The goal of Serverless is to focus on writing the code that delivers business value and offload everything else to your trusted partners (like Cloud providers or SaaS vendors). You want to iterate quickly and today’s code quickly becomes tomorrow’s technical debt. In this talk we will show why Serverless adoption increases the developer productivity and how to measure it. We will also go through AWS Serverless architectures where you only glue together different Serverless managed services relying solely on configuration, minimizing the amount of the code written.

Speakers
avatar for Vadym Kazulkin

Vadym Kazulkin

Head of Technology Strategy, ip.labs GmbH
Vadym Kazulkin is Head of Technology Strategy at ip.labs GmbH, a 100% subsidiary of the FUJIFLM Group, based in Bonn. ip.labs is the world's leading white label e-commerce software imaging company. Vadym has been involved with the Java ecosystem for over 20 years. His focus and interests... Read More →


Wednesday October 6, 2021 12:00 - 13:00 CEST
#4 Cloud Platforms

12:00 CEST

Microservices? Monoliths? An Annoying Discussion!
Microservices set out to solve the problem of monoliths. Or do they? After all, it is now fashionable to condemn microservices - then monoliths must have been the right solution! The discussion is quite annoying and the fact that it exists at all already shows a fundamental misunderstanding of what architecture is actually about and that our industry unfortunately has significant weaknesses when it comes to making serious progress.

Have a look at the Session Teaser!​​​

Speakers
avatar for Eberhard Wolff

Eberhard Wolff

Fellow, INNOQ
Eberhard Wolff has 15+ years of experience as an architect and consultant - often on the intersection of business and technology. He is a Fellow at innoQ in Germany. As a speaker, he has given talks at international conferences and as an author, he has written more than 100 articles... Read More →


Wednesday October 6, 2021 12:00 - 13:00 CEST
#5 Architecture

13:00 CEST

(An introduction to) Domain Storytelling
Domain Storytelling is a collaborative modeling method. It brings together domain experts and development teams and helps them to understand the domain of a software system, find microservices boundaries, and to talk about requirements. Domain Storytelling means that we let domain experts tell us stories about their tasks. While listening, we record the stories using a pictographic language. The domain experts can see immediately whether we understand their story correctly. After very few stories, we are able to talk about the people, tasks, tools, work items, and events in that domain.

Speakers
avatar for Henning Schwentner

Henning Schwentner

Coder, Coach, Consultant, WPS – Workplace Solutions
Henning loves programming in high quality. He lives this passion as coder, coach, and consultant at WPS – Workplace Solutions in Hamburg, Germany. There he helps teams to structure their monoliths or to build new systems from the beginning with a sustainable architecture. Microservices... Read More →


Wednesday October 6, 2021 13:00 - 14:00 CEST
#5 Architecture

13:00 CEST

APIOps - Automatisierte Prozesse für bessere APIs
Die Entwicklung von APIs beginnt immer mit der alten und mittlerweile langweiligen Schlacht von API oder Code first. Aber die Arbeit mit APIs bezieht sich auf einen Prozess, der Design, Entwicklung und Betrieb umfasst. Mit diesen Gedanken im Hinterkopf und den Möglichkeiten von API-Gateways und -Plattformen, diese Prozesse zu unterstützen, stellt sich sehr schnell die Frage, wie diese Prozesse automatisiert werden können. Daniel Kocot zeigt in seiner Session auf, wie API-Gateways oder -Plattformen den Entwicklungsprozess von APIs nach der DevOps-Idee und dem CALMS-Modell positiv beeinflussen können, um den Konsumenten bessere APIs zu liefern.

Speakers
avatar for Daniel Kocot

Daniel Kocot

API Expert / Senior Solutions Architect, codecentric AG
Daniel Kocot ist der erste Kong Champion (Experte für das API-Gateway Kong) Deutschlands und seit 2016 bei codecen- tric. Schon seit Anfang der 2000er Jahre widmet er sich dem Thema der digitalen Transformation. Neben den aktuellen Schwerpunkten API Management, Application Lifecycle... Read More →


Wednesday October 6, 2021 13:00 - 14:00 CEST
#2 Main EN/DE

13:00 CEST

Building Microservices with Helidon and Kotlin
Helidon is a great choice for building microservices. It is a collection of libraries that run on a fast web core powered by Netty. There is full support for CDI, a reactive DB client, and full GraalVM native image support. In addition, Helidon provides an implementation of MicroProfile specification that makes it a good choice for enterprise developers. In this session we will use a huge repository of Helidon in Kotlin examples. You will learn about the language features that make developing Helidon applications a breeze. Along the way, we will take a closer look at the Reactive API to boost performance of your apps.

Speakers
avatar for Dmitry Alexandrov ✈️

Dmitry Alexandrov ✈️

Software developer, Oracle
Dmitry is a Senior Principle Developer at Oracle, Java Champion, Oracle Dev Champion. He has more than a decade experience mainly in Java Enterprise in banking/telecom, but interested in dynamic languages on JVM and features like massive computations on GPUs. He is a co-lead of the... Read More →


Wednesday October 6, 2021 13:00 - 14:00 CEST
#3 Java Cloud Native

13:00 CEST

Seriously gaming your cloud expertise: from cloud tourist to cloud native
No cloud skills, no career. As we accelerate towards the future of everything online, cloud skills will be ever more in demand. Not just for engineers, but for your whole DevOps team and the rest of the office, too. But where to start learning? AWS alone offers nearly 200 services, Azure lists nearly 275 of them. And then we stuff like containers, orchestration, serverless, databases, machine learning, IoT, cost optimization, networking, security. It‘s all quite overwhelming. Let me help by showing you the learning paths you can follow towards cloud competence, plus the serious game and social learning application we developed to become cloud natives.

Speakers
avatar for Piet van Dongen

Piet van Dongen

Cloud Consultant, Luminis
Piet van Dongen is cloud consultant and senior software engineer at Luminis Arnhem. He loves to help organisations with mapping and exploring software and business opportunities. The more complicated, the better! Piet can be found regularly on stage at conferences like Codemotion... Read More →


Wednesday October 6, 2021 13:00 - 14:00 CEST
#4 Cloud Platforms

13:00 CEST

The Hacker's Guide to JWT Security
JSON Web Token (JWT) is an open standard for creating tokens that assert some number of claims like a logged in user and his/her roles. JWT is widely used in modern applications as a stateless authentication mechanism. Therefore, it is important to understand JWT security risks, especially when broken authentication is among the most prominent security vulnerabilities according to the OWASP Top 10 list. This talk guides you through various security risks of JWT, including confidentiality problems, vulnerabilities in algorithms and libraries, token cracking, token sidejacking, and more. In live demos, you’ll learn how to hijack a user account exploiting common security vulnerabilities on the client-side, on the server-side, and in transport. You’ll also find out about common mistakes and vulnerabilities along with the best practices related to the implementation of JWT authentication and the usage of available JWT libraries.

Speakers
avatar for Patrycja Wegrzynowicz

Patrycja Wegrzynowicz

CTO, Yon Labs
Patrycja Wegrzynowicz is a software visionary and expert specialized in automated software engineering, security, and Java technologies. She is the founder and CTO of Yon Labs, a start-up focused on detection and refactoring of software defects, including security vulnerabilities... Read More →


Wednesday October 6, 2021 13:00 - 14:00 CEST
#1 Main EN only

14:00 CEST

Adapting Java for the Serverless world
Java is for many years one of the most popular programming languages, but it used to have hard times in the Serverless Community. Java is known for its high cold start times and high memory footprint. For both you have to pay to the cloud providers of your choice. That's why  most developers tried to avoid using Java for such use cases. But the times change: Community and cloud providers improve things steadily for Java developers. In this talk we look at the features and possibilities AWS cloud provider offers for the Java developers and look the most popular Java frameworks, like Micronaut, Quarkus and Spring (Boot) and look how (AOT compiler and GraalVM native images play a huge role) they address Serverless challenges and enable Java for broad usage in the Serverless world.

Speakers
avatar for Vadym Kazulkin

Vadym Kazulkin

Head of Technology Strategy, ip.labs GmbH
Vadym Kazulkin is Head of Technology Strategy at ip.labs GmbH, a 100% subsidiary of the FUJIFLM Group, based in Bonn. ip.labs is the world's leading white label e-commerce software imaging company. Vadym has been involved with the Java ecosystem for over 20 years. His focus and interests... Read More →


Wednesday October 6, 2021 14:00 - 15:00 CEST
#4 Cloud Platforms

14:00 CEST

Kryptographie für Einsteiger
Wissen über die Grundlagen der Kryptographie werden immer wichtiger. Kaum ein Projekt, in dem nicht Verschlüsselungstechniken eingesetzt werden. Durch die Nutzung verteilter Architekturen wie z.B. Microservices wird die Absicherung der Kommunikation immer wichtiger. Neben der Absicherung der Kommunikation zwischen Systemen werden damit unter anderem Kennwörter sicher gespeichert. Immer wichtiger wird die Nutzung von Kryptographie zur Authentifizierung der Kommunikationspartner. Die meisten Konfiguration und Abläufe benötigen kaum detailliertes Wissen. Kommt es jedoch zu Problemen hilft einem grundlegendes Wissen der zugrundeliegenden Technik bei der Lösung. Der Vortrag führt praxisorientiert in die Grundlagen der Verschlüsselung ein. - Was ist symmetrische / asymmetrische Verschlüsselung? - Welche Verschlüsselungsverfahren gibt es? - Was ist eine Cipher Suite? - Was sind Hashes? - Private Key, Public Key und Zertifikat - Was ist eine CA? - Die digitale Unterschrift

Speakers
avatar for Sebastian Hempel

Sebastian Hempel

Freelancer, IT-Consulting Hempel
Sebastian Hempel ist selbständiger IT-Consultant und Trainer aus dem Fichtelgebirge. Seit 2003 unterstützt er Kunden bei der Entwicklung und dem Betrieb von Enterprise Anwendungen. Seine Schwerpunkte liegen dabei bei Java EE auf Linux Systemen. In Projekten übernimmt er gerne die... Read More →


Wednesday October 6, 2021 14:00 - 15:00 CEST
#2 Main EN/DE

14:00 CEST

Cloud native Java microservices with GraalVM
GraalVM can improve performance of your applications by using a more sophisticated and powerful JIT compiler. It can also completely change the runtime performance of your applications by compiling them to native binaries with the Native Image technology giving them instant startup and lowering memory footprint. Many popular frameworks include support for using native image and help with starting to benefit from it. In this session we'll look at some of the "best practices" that come up in the projects using native images. From simplifying the configuration, to making the executables smaller, to learning about the memory management and configuration, we'll talk about the things you need to know most to use GraalVM native image effectively. And after the session you'll be better equipped to use native image in your projects, understand the trade-offs better and how to integrate it with your project workflows the best.

Speakers
avatar for Oleg Šelajev

Oleg Šelajev

Devrel, Oracle
Oleg Šelajev is a developer advocate at Oracle Labs working on GraalVM -- the high-performance runtime for Java, Kotlin, Scala, and other languages like JavaScript, Ruby, Python, R, webassembly, Squeak, and even native languages like C. He organizes VirtualJUG, the online Java User... Read More →


Wednesday October 6, 2021 14:00 - 15:00 CEST
#3 Java Cloud Native

14:00 CEST

Ethereum for Java Developers
Blockchain technology is often dismissed as a useless overhyped pyramid-scheme by big parts of the IT community. At the same time, people tend to throw Bitcoin, cryptocurrency, NFTs, Ethereum and Proof-of-Work into the same bag, which leads to false assumptions about applicability and drawbacks of blockchain technology. I don’t want to convert anyone into a blockchain zealot, but I’d like to capture your curiosity as engineers and computer scientists. Ethereum is an exciting technology and a technological experiment on a world scale. It provides us with a global singleton computer, that can’t be stopped or censored by third parties, while at the same time being ubiquitous. It is natively object-oriented and open by design all the while being accessible by using traditional programming languages and constructs. It provides us with a new class of applications, decentralized apps (Dapps). While I don’t think what you learn in this talk will be something you will directly apply in your day to day work, I hope it will inspire you to see things that might be. To say it in the words of Alan Turing, the father of modern computer science and artificial intelligence: “We can only see a short distance ahead, but we can see plenty there that needs to be done.”

Speakers
avatar for Kevin Wittek

Kevin Wittek

Software Engineer, AtomicJar Inc.
Testcontainers co-maintainer, passionate about FLOSS, containers and Java. Oracle Groundbreaker Ambassador. Likes to write Python programs to support his wife in performing behavioral science experiments with pigeons. Plays the electric guitar and is a musician in his second life.After... Read More →


Wednesday October 6, 2021 14:00 - 15:00 CEST
#1 Main EN only

14:00 CEST

Fighting Climate Change by Building Sustainable Software
As software engineers, we build applications that eventually run on one or more servers, which consume electricity. Electricity is commonly generated by coal, oil, gas; when burned, they produce carbon dioxide (CO2), which is the main driver of climate change. Clearly, our software applications have an environmental impact based on the resources (CPU, number of servers, etc.) that they consume. What can we do to reduce the environmental footprint of our software applications? This session provides practical guidelines that will help you reduce or even eliminate the emissions of carbon dioxide associated with your software applications, a process that is also known as decarbonization. It is assumed you are involved in building software applications and aspire to help prevent climate change.

Speakers
avatar for Ioannis Kolaxis

Ioannis Kolaxis

Software Architect, Atos
Ioannis Kolaxis is a Software Architect, building Next Generation 911/112 software solutions that empower emergency services to save lives. He shares his experience with the software development community, speaking at international conferences, such as Oracle Code One 2019. He is... Read More →


Wednesday October 6, 2021 14:00 - 15:00 CEST
#5 Architecture

15:00 CEST

DDD, CQRS, and Event Sourcing, beyond the hype
The demands of software changed dramatically in the last 20 years. Yet, the dominant architectural styles are still based on patterns from the 70s. Although new architectural patterns have emerged, the benefits are often brushed aside with the excuse of being ‘too complex’ or ‘not necessary.’ How can we take advantage of these benefits without getting distracted by the technical details that threaten the simplicity of our solution? How do we keep up with the changing non-functional requirements? In this session, after a brief review of where we came from, we’ll weed out the hype around Event Sourcing. We will look at how DDD, CQRS, and Event Sourcing are combined to form an architectural style that allows us to separate the behavior from the technical details. We will not limit ourselves to the promises made in conjunction with these principles but find out how to really deliver on them.

Speakers
avatar for Allard Buijze

Allard Buijze

CTO & Founder, AxonIQ
Allard Buijze is Founder and CTO of AxonIQ. Starting at the age of 6, he has developed a great passion for programming and has guided both large and small organizations in building performant and scalable applications. Now, he is on a mission to make implementations of large scale... Read More →


Wednesday October 6, 2021 15:00 - 16:00 CEST
#1 Main EN only

16:00 CEST

Functional Core für einen seiteneffektfreien Anwendungskern
Erfreust du dich an den Vorteilen funktionaler Programmierung? Der Code ist verständlicher, da Funktionen keine Seiteneffekte haben. Immutable Objects vereinfachen das Debugging. Auch das Testen ist einfacher, weil Ergebnisse bei gleichen Eingabeparametern immer gleich sind. Solltest du deshalb auf rein funktionale Programmiersprachen umsteigen? Das muss nicht sein. Die Vorzüge lassen sich auch in eher imperativ ausgerichteten Sprachen wie Java nutzen. Wie ist das möglich? Durch die strikte Trennung von Funktionen mit und ohne Seiteneffekten (pure/impure Functions). Leider scheint das hierfür aus der Ruby-Welt bekannte Architekturmuster "Functional Core / Imperative Shell" in der Java-Welt kaum bekannt zu sein. In dieser Architektur ist der Kern einer Anwendung („Functional Core“) funktional beschreibbar, Objekte sind immutable und Funktionen sind pure. Eingepackt wird der Kern in eine Seiteneffekt-behaftete Hülle („imperative Shell“) - schließlich müssen wir irgendwo Daten persistieren oder mit anderen Services sprechen. Wir möchten die Vor- und Nachteile dieses Musters aus Erfahrungen zusammenstellen, die von der Entwicklung bis zur Livesetzung von ES/CQRS-Microservices mit diesem Architekturprinzip entstanden sind.

Speakers
avatar for Thomas Ruhroth

Thomas Ruhroth

Lead IT Consultant, msg systems ag
In seiner industriellen Arbeitserfahrung arbeitete er als Entwickler, Software-Architekt und Business-Analyst in verschieden Bereichen wie Geographische Informationssysteme und Logistik. In der Forschung liegt sein Fachgebiet in der Softwarespezifikation und in der Entwicklung langlebiger... Read More →
avatar for Kai Schmidt

Kai Schmidt

IT engineer, Kai Schmidt
Kai Schmidt is a freelance software developer and architect. Prior he was employed by the IT consulting companies .msg systems ag and Capgemini. In his 15 years of project experience he worked mostly in Java, Kotlin and C # projects in the areas of logistics, aircraft construction... Read More →


Wednesday October 6, 2021 16:00 - 17:00 CEST
#5 Architecture

16:00 CEST

GraalVM 21.2 Feature Update der universellen VM
Die GraalVM ist eine universelle Virtuelle Maschine (VM) für Anwendungen, die in JavaScript, Python, Ruby, R oder mit den JVM-basierten Programmiersprachen Java, Scala, Kotlin, Clojure und LLVM-basierten Sprachen C/C++ geschrieben wurden. Im Juli 2021 wurde die GraalVM 21.2.0 freigegeben, mit Performance-Verbesserungen und polyglotter Unterstützung für verschiedene Programmiersprachen und sie ermöglicht damit die Interoperabilität in einer gemeinsamen Laufzeitumgebung. GraalVM kann eigenständig oder im Kontext von OpenJDK, Node.js, Oracle Datenbank oder MySQL betrieben werden. Mit GraalVM Ahead-of-Time-Fähigkeit kompilierte Native Images verfügen über eine optimierte Startup-Zeit und sie verringern den Memory-Verbrauch von JVM-basierten Applikationen. Die GraalVM kann wahlweise als Open Source Community Edition (CE) oder als Enterprise Edition (EE) mit OTN Lizenz innerhalb der Java SE Subscription verwendet werden. Im Vortrag wird die GraalVM-Architektur im Java Eco System dargestellt und die Einsatzgebiete werden erläutert, beispielsweise der in Java entwickelte C2 JIT Compiler oder die Verwendung von GraalVM Native Images. GraalVM und OpenJDK können auch für Microservices-Frameworks verwendet werden.

Speakers
avatar for Wolfgang Weigend

Wolfgang Weigend

oracle solution engineer Java & GraalVM technology, ORACLE Global Services Germany GmbH
Wolfgang Weigend arbeitet als Master Principal Solution Engineer bei der ORACLE Global Services Germany GmbH im weltweiten Java Team. Er beschäftigt sich mit Java-Technologie, GraalVM und Architektur für unternehmensweite Anwendungsentwicklung.


Wednesday October 6, 2021 16:00 - 17:00 CEST
#3 Java Cloud Native

16:00 CEST

Java applications containerized and deployed, make your buildpack edition
When containerization came out (7 years ago!), the only option to containerize a Java was to write a Dockerfile and ADD the jar to the image; container orchestration was not a thing yet. Since then, many image building tools appeared (bazel, buildah) - even a Java based one! (Jib). In this talk, we'll quickly discover the pros and cons of those options - we'll then focus on "buildpacks" (including how to create our own), that promise to free the developers from building concerns.

Speakers
avatar for Anthony Dahanne

Anthony Dahanne

Software Engineer, National Bank of Canada
Software Developer for 10+ years, my favorite topics are containerization (Docker and Kubernetes), building tools, Continuous Integration and, of course, core Java development. On my spare time, I work on various open source projects : from Twitter bots written in NodeJS, to Android... Read More →


Wednesday October 6, 2021 16:00 - 17:00 CEST
#4 Cloud Platforms

16:00 CEST

Java In-Memory Database-Apps with MicroStream
MicroStream is a unique storage technology that stores Java object-graphs natively, which means similar as they are in the RAM, without expensive transformation to any incompatible data structure. That is the key difference to all database systems and provides you with fantastic benefits. We will take a tour through the main features, live code and in-depth description of the essential parts of the framework.

Speakers
avatar for Florian Habermann

Florian Habermann

CTO, MicroStream Software GmbH
Java since 1999. For over 20 years, the main goal of his daily work is making database development with Java much easier and faster than it is today. He still uses every free minute for coding and research.


Wednesday October 6, 2021 16:00 - 17:00 CEST
#1 Main EN only

16:00 CEST

Newest and coolest features in Helidon
Helidon evolves at highest possible speed. A lot new features and integrations are there to speed up your productivity and give your product new possibilities. In this talk we will highlight: - Neo4j integration - Micrometer Support - RSocket support - JHipster Helidon integration -

Speakers
avatar for Dmitry Alexandrov ✈️

Dmitry Alexandrov ✈️

Software developer, Oracle
Dmitry is a Senior Principle Developer at Oracle, Java Champion, Oracle Dev Champion. He has more than a decade experience mainly in Java Enterprise in banking/telecom, but interested in dynamic languages on JVM and features like massive computations on GPUs. He is a co-lead of the... Read More →


Wednesday October 6, 2021 16:00 - 17:00 CEST
#2 Main EN/DE

17:00 CEST

Integrated Tests den Kampf ansagen
Eines vorneweg: Es spricht natürlich nichts gegen die Integrationstests aus der guten alten Testpyramide! Nein, hier soll es um Integrierte Tests gehen. Einfach gesagt sind das Testfälle, die fehlschlagen können, obwohl an der eigenen Applikation nichts geändert wurde. Wie identifiziere ich also solche Tests und welche Mittel sind dagegen gewachsen? Nach einer Begriffsklärung sehen wir uns gemeinsam Strategien an, mit denen wir integrierte Tests aus unseren Projekten verbannen können. Als Grundlage dient eine Spring Boot Applikation, viele der gezeigten Vorgehensweisen und Bibliotheken lassen sich aber auch in einem anderen Technologiestack umsetzen.

Speakers
avatar for Julius Mischok

Julius Mischok

CTO, Mischok GmbH
Julius Mischok ist Geschäftsführer der Mischok GmbH in Augsburg. Seine Kernaufgaben sind Prozessentwicklung, sowie Coaching und Schulung der Entwicklungsteams. Aktuell fokussiert sich seine Arbeit auf die Frage, wie Software schnell und mit einer maximalen Wertschöpfung produziert... Read More →


Wednesday October 6, 2021 17:00 - 18:00 CEST
#2 Main EN/DE

17:00 CEST

MicroStream Best-Practice
Auch die raffinierteste, schnellste und einfachste Storage Lösung MicroStream kommt im Kern nicht ohne eine gewisse Komplexität aus. Diese Komplexität innerhalb einer Dokumentation vollständig zu vereinfachen oder diese dann auch vollständig zu lesen, analysieren und verstehen kann meist sehr Zeitintensiv sein. Aus diesem Grund dreht sich in diesem Track alles um die Best-Practices im Umgang mit MicroStream. Wie sieht mein Projektsetup aus? Welche Konfigurationen sind möglich, sinnvoll und sollten getätigt werden? Aber auch Standardfragen wie: „Gibt es eine Backup-Strategie, wenn je welche?“ oder „Was passiert, wenn sich Daten ändern?“ werden in diesem Track beantwortet. Wir werden gemeinsam ein komplettes Setup am lebenden Projekt durchführen und viel Code betrachten und ausführen. Wollt Ihr also schnell in ein neues Zeitalter der Speicherung von Daten einsteigen dann ist dieser Track definitiv „The BEST PLACE to BE“.

Speakers
avatar for Christian Kuemmel

Christian Kuemmel

Project Manager, Senior Software Consultant, MicroStream Software GmbH
Projektleiter, Senior Software Consultant 12 Jahre im Java Umfeld tätig 8 Jahre Erfahrung im Umgang mit Hibernate Seit ca. 2 Jahren bei MicroStream


Wednesday October 6, 2021 17:00 - 18:00 CEST
#3 Java Cloud Native

17:00 CEST

Automating & Monitoring Seedling Growth in the Cloud Using IoT, Messaging & Micronaut
It all started with a small project to pass the time during The Great Quarantine of 2020. I bought some chiles from the local farmer’s market (with proper face coverings and social distancing, of course), fermented my first batch of hot sauce, and shared it with a few friends around the globe. I had no idea the sauce would be such a massive success, so I resolved to build on that triumph in 2021. But this time, I knew that I would have to start from the very beginning and grow the chiles myself. Of course, this presented the wonderful opportunity to combine two of my life’s greatest passions - the culinary arts and technology - to ensure that my growth operation was the ultimate success. Join me in this session where I show you how I used a microcontroller, some sensors and the cloud to monitor and automate the germination and maturation of this year’s crop.

Speakers
avatar for Todd Sharp

Todd Sharp

Developer Advocate, Oracle
I'm a Developer Advocate for Oracle focusing on the Oracle Cloud and Cloud Databases. I have 17 years of experience as a full-stack developer. I've been working with Java and dynamic JVM languages as well as various JavaScript frameworks for my whole career. I'm obsessed with technology... Read More →


Wednesday October 6, 2021 17:00 - 18:00 CEST
#4 Cloud Platforms

17:00 CEST

Java: From Stateless-Serverful to Stateful-Serverless
For many years now, stateless-serverful has been the go-to pattern for building backend services. This pattern is well understood and supported by mature, powerful toolsets. While we have continually improved and fine-tuned stateless-serverful, we are always on the lookout for something better, something different that may significantly improve how we build and run our systems. Often, a better way to do things is to take things in an alternate direction. In this case, replace stateless with stateful, replace serverfull with serverless. So what is stateful-serverless? Well, that is what we will cover in this session. Using Java, we will show you an approach for building and deploying stateful-serverless microservices.

Speakers
avatar for Hugh McKee

Hugh McKee

Developer Advocate, Lightbend
Hugh McKee is a developer advocate at Lightbend. He has had a long career building applications that evolved slowly, inefficiently utilized their infrastructure, and were brittle and prone to failure. Hugh has learned from his past mistakes, battle scars, and a few wins. And the learning... Read More →


Wednesday October 6, 2021 17:00 - 18:00 CEST
#5 Architecture

17:00 CEST

RESTful Java: 2021 Edition
RESTful Java is constantly evolving. If you are starting a new project or modernizing an old one, it can be complicated to choose what APIs and frameworks to use.  In this session, we'll compare and contrast several popular Java APIs and frameworks for creating and consuming RESTful services. We'll also cover when and where some APIs make more sense than others and some basic architecture practices to facilitate porting between different frameworks. This session is intended for beginners, but seasoned veterans are welcome too.

Speakers
avatar for Andrew McCright

Andrew McCright

Web Services Architect, IBM
Andy is a Web Services Architect and Senior Software Engineer at IBM's WebSphere and Open Liberty development lab based in Rochester, Minnesota.  He is a frequent contributor to open source software such as Open Liberty, Apache CXF, RESTEasy, MicroProfile, Jakarta RESTful Web Services... Read More →


Wednesday October 6, 2021 17:00 - 18:00 CEST
#1 Main EN only

18:00 CEST

Using Record Types to Build Better Domain Models
Starting with Java 14 Oracle has provides us with Record Types. They are a step towards true value types. We look at the current status and what's in the box for the future. In this talk we will look at: * what's behind the motto "Codes like a class - works like an int" * why immutabilty leads to less failures * why value types make your code at the same time better readable and more efficient * the difference between refence and value types * the new syntax to support value types in Java * how value types are implemented in other languages * what inheritance means for value types * the advantages of storing data on the stack versus storing data on the heap * and most important: how value types can help us to provide a better domain model

Speakers
avatar for Henning Schwentner

Henning Schwentner

Coder, Coach, Consultant, WPS – Workplace Solutions
Henning loves programming in high quality. He lives this passion as coder, coach, and consultant at WPS – Workplace Solutions in Hamburg, Germany. There he helps teams to structure their monoliths or to build new systems from the beginning with a sustainable architecture. Microservices... Read More →


Wednesday October 6, 2021 18:00 - 19:00 CEST
#2 Main EN/DE

18:00 CEST

Back to the CompletableFuture: Concurrency in Action
Callback hell is a known way to give any JavaScript developer nightmares. However, Java developers are not much better off since anything concurrency and multithreading related gives us cold sweats. With Threads and Runnables being the very first (and often last) things we used in Java, these classes gave many of us impression of and appreciation for complexities of concurrency. As a result, many developers abandoned the idea of ever touching thread management in Java and focused on a single-threaded development. Fear no more! The world of concurrency in Java has changed since JDK8 and continues getting better. In this talk, we discuss improvements around Concurrency API of JDK5 and the power of asynchronous programming of CompletableFutures post-JDK8. Our goal is to break out of the fear of concurrency in Java and to learn about a new, declarative way of thread programming.

Speakers
avatar for Dmitry Vinnik

Dmitry Vinnik

Open Source Developer Advocate at Facebook, Facebook
Dmitry is an Open Source Developer Advocate at Facebook, where he focuses on projects in the mobile space. His goal is to help developers be more productive through open source. Dmitry continues being a developer-first, so he applies the same mindset and passion when working on open... Read More →


Wednesday October 6, 2021 18:00 - 19:00 CEST
#1 Main EN only

18:00 CEST

Exploring Stateful Microservices built with Open Liberty in Kubernetes
How does one choose to architect a system that has a Microservice / REST API endpoints? There are many solutions out there. Some are better than others. Should state be held in a server side component? Generally we are told this is a bad practice, but is it? It’s unclear and this confusion may lead to poor technology stack choices that are impossible or extremely hard to change later on as your system evolves in terms of demand and performance. We will explore into a tried and true, enterprise-grade, Java Open Source stack - Open Liberty in Kubernetes - which exercises and promises to fulfill the expectations of a modern server solution that epitomizes all the elements needed to build, run and deploy an efficient production system today. We will examine and demonstrate the fundamentals of such a system that’s built with Open Liberty in Kubernetes: * Microservices/REST API – Options to use when running your apps in the JVM * Concurrency – how to take advantage of multi-core CPUs and clustered distributed systems * Stateful vs Stateless - while stateless apps are easier to implement, the bulk of the apps in production are stateful which involve a higher level of complexity and risk, especially when data would need to travel across multiple machine and network boundaries * Deployment – how about containerization and orchestration using Kubernetes?

Speakers
avatar for Mary Grygleski

Mary Grygleski

Developer Advocate, IBM
Mary is a Sr Developer Advocate at IBM with the Liberty/Websphere team, focusing on Liberty, Microprofile, Jakarta EE, Open Source Java, Cloud, Distributed Systems. She transitioned from Unix/C to Java in 2000 and has never looked back since then. She considers herself as a polyglot... Read More →


Wednesday October 6, 2021 18:00 - 19:00 CEST
#3 Java Cloud Native

18:00 CEST

Object Compaction in Cloud for High Yield
In file systems, large sequential writes are more beneficial than small random writes, and hence many storage systems implement a log structured file system. In the same way, the cloud favors large objects more than small objects. Cloud providers place throttling limits on PUTs and GETs, and so it takes significantly longer time to upload a bunch of small objects than a large object of the aggregate size. Moreover, there are per-PUT calls associated with uploading smaller objects. In Netflix, a lot of media assets and their relevant metadata is generated and pushed to cloud. Most of these files are between 10s of bytes to 10s of kilobytes and are saved as small objects on Cloud. In this talk, we would like to propose a strategy to compact these small objects into larger blobs before uploading them to Cloud. We will discuss the policies to select relevant smaller objects, and how to manage the indexing of these objects within the blob. We will also discuss how different cloud storage operations such as reads and deletes would be implemented for such objects. This includes recycling blobs that have dead small objects - due to overwrites, etc. Finally, we would showcase the potential impact of such a strategy on Netflix assets in terms of cost and performance.

Speakers
avatar for TEJAS CHOPRA

TEJAS CHOPRA

Senior Software Engineer, Netflix, Inc.
Tejas Chopra is a Senior Software Engineer, working in the Data Storage Platform team at Netflix, where he is responsible for architecting storage solutions to support Netflix Studios and Netflix Streaming Platform. Tejas is an International Keynote Speaker and periodically conducts... Read More →


Wednesday October 6, 2021 18:00 - 19:00 CEST
#4 Cloud Platforms

18:00 CEST

Spring For Architects
With globally distributed applications (and teams!) the job of software architect isn’t getting any easier; applications are growing increasingly complex and architects are spread thin. You can’t be involved with every decision, you must empower your teams while ensuring they are making good choices. How do you do that? How can frameworks like Spring not only make your life easier but help your teams deliver robust applications to production? Spring Cloud has a veritable plethora of sub projects from circuit breakers to functions simplifying the task of building cloud native applications while making it easy for developers to adhere to best practices. At the same time it can be overwhelming to get your head wrapped around all the features Spring offers. This talk will show how Spring allows architects to focus on the critical design decisions they need to make while ensuring developers are empowered to implement critical business use cases. Today’s cloud native applications have similar pitfalls, luckily Spring is here to help you resolve them!

Speakers
avatar for Nathaniel Schutta

Nathaniel Schutta

Software Architect, Pivotal
Nathaniel T. Schutta is a software architect focused on cloud computing and building usable applications. A proponent of polyglot programming, Nate has written multiple books and appeared in various videos. Nate is a seasoned speaker regularly presenting at conferences worldwide... Read More →


Wednesday October 6, 2021 18:00 - 19:00 CEST
#5 Architecture

19:00 CEST

Eclipse Adoptium - Was ist das eigentlich?
In den letzten Jahren gingen bzgl. der neuen Java-Roadmap und der geänderten Lizenzbestimmungen von Oracle viele Gerüchte durch die Java Community. Heute kann man sich nicht mehr einfach seine Java Runtime bei Oracle runterladen und auf den eigenen Firmenservern nutzen sondern muss zwischen verschiedenen Providern wählen. Einer dieser Runtime Anbieter ist Eclipse Adoptium. Aber wer bzw. was verbirgt sich eigentlich hinter Eclipse Adoptium und wie unterscheiden sich deren Java Distributionen und Lizenzen von anderen Anbietern? Und was hat AdoptOpenJDK eigentlich damit zu tun? Als Working Group Mitglied und Commiter bei Adoptium will ich in diesem Talk einen Überblick zur Entstehung und Intention von Eclipse Adoptium geben und zeigen, wie hier ein großes Community-Basiertes Projekt zur kostenlosen Weiternutzung von Java entstanden ist. Natürlich wird auch auf Fragen zum Thema Security und Zukunftssicherheit von Adoptium eingegangen. Zusätzlich werde ich die aktuellen und zukünftigen Ziele des Projektes aufzeigen und auch Ideen geben, wie interessierte Teilnehmer sich bei dem Projekt beteiligen und einbringen können.

Speakers
avatar for Hendrik Ebbers

Hendrik Ebbers

Co-Founder, Karakun GmbH
Hendrik Ebbers (@hendrikEbbers) ist Java Champion, JCP Expert Group Member und als Rockstar-Speaker der JavaOne ausgezeichnet. Hendrik ist Co-Founder der Karakun AG und Gründer der JUG Dortmund sowie der Cyberland. Hendrik gibt auf der ganzen Welt Vorträge und Workshop zum Thema... Read More →


Wednesday October 6, 2021 19:00 - 20:00 CEST
#2 Main EN/DE

19:00 CEST

Handling exceptions, the functional way
You’re working on your Java application when suddenly your compiler yells at you - ”Hey! This operation here throws an exception, you should handle it”. Usually, the next move is either a) wrap everything in a try-catch block, or b) propagate the exception. Then you think, a) is very imperative and usually comes with state mutation, while b) will require refactoring the codebase, and will likely end up with a) at some point. In this talk we’ll see how we can better handle exceptions in Java in a functional/immutable style, using only our wit and will, and a lightweight library called “maybe” to help with the heavy load.

Speakers
avatar for José Luis León

José Luis León

Full Stack Developer, Stack Builders
My name is José Luis León, I’m a software developer working at Stack Builders with about 6 years of experience in full-stack development. I enjoy contributing to the software community, which makes me spend my time helping contribute to open source libraries or working on ideas... Read More →


Wednesday October 6, 2021 19:00 - 20:00 CEST
#1 Main EN only

19:00 CEST

Integration- and conversation-patterns for microservices
Companies deal with integration problems in many areas and on many layers. Loosely coupled integration does not only allow for designing independent systems that can be developed and operated individually, but can also increase availability and reliability of the overall system - particularly by using asynchronous communication. Text books provide standard patterns for designing integration- and conversation-scenarios - but for architects it's not always clear which integration approach or technology is the best match for their given problem. In this session, we demonstrate with the aid of concrete use cases, how integration- and conversation-patterns can be architected in a microservices scenario. We further provide guidance on the integration technology, while we focus on cloud-native and serverless tools.

Speakers
avatar for Dirk Fröhner

Dirk Fröhner

Solutions Architect, Amazon Web Services
In his role as Solutions Architect at Amazon Web Services, Dirk Fröhner supports enterprise customers to reach their goals better using the cloud, push ahead digitization, and allow more space for innovation. For this, he contributes his wealth of experience in backend development... Read More →


Wednesday October 6, 2021 19:00 - 20:00 CEST
#4 Cloud Platforms

19:00 CEST

Paving the road with Jakarta EE and Apache TomEE
With the migration of the javax to jakarta package in Jakarta EE 9 and the support for the Java SE 11 runtime in Jakarta EE 9.1, the Java enterprise ecosystem, tooling and end-users have now a great opportunity cost to migrate or bootstrap Java Enterprise applications. This session covers code-driven recommendations and strategies to help you navigate the migration process towards Java cloud-native using Apache TomEE.

Speakers
avatar for Cesar Hernandez

Cesar Hernandez

Senior Software Engineer, Tomitribe
Cesar Hernandez is a Senior Software Engineer at Tomitribe with +10 years of experience in Enterprise Java Applications. He is a Java Champion, Duke's Choice Award winner, Open Source advocate, Eclipse and Apache Committer, teacher and public speaker. When César is away from a computer... Read More →


Wednesday October 6, 2021 19:00 - 20:00 CEST
#3 Java Cloud Native

19:00 CEST

What Does a Good Microservice Architecture Look Like?
We have been building microservice architectures for about ten years now. And slowly but surely, the same thing is happening to us that made us sick and tired of our previous architectures. Technical debt is rapidly piling up, development costs are rising, and the architecture is turning into a big unmanageable ball. But, this isn't inevitable! With real-world examples, Carola will discuss how the RIGHT microservice architecture can rescue your organization.

Speakers
avatar for Carola Lilienthal

Carola Lilienthal

Managing Director, WPS - Workplace Solutions
Dr. Carola Lilienthal is Managing Director of WPS - Workplace Solutions GmbH and has been regularly analysing the future viability of software architectures on behalf of her customers since 2003. In 2015, she summarized her experiences from over a hundred analyses in the book "Langlebige... Read More →


Wednesday October 6, 2021 19:00 - 20:00 CEST
#5 Architecture

20:00 CEST

How Microsoft Learned to Love Java
This session is a fast-paced tour of all things Java and Azure at the modern Microsoft of today. We will first talk about the why, how and what of Java and Microsoft. We will then dive right into the broad range of tools, services and APIs that Microsoft offers around Azure for Java developers. We will show a small but representative demo of a Java application most developers would feel familiar with running well on Azure. Lastly, we will discuss the road map for what Java developers can expect from Microsoft in the future. This session is as much about sharing what Microsoft offers today as it is about listening to what the Java community wants to see from Microsoft tomorrow.

Have a look at the Session Teaser!​​​

Speakers
avatar for Reza Rahman

Reza Rahman

Principal Program Manager, Microsoft
Reza Rahman is Principal Program Manager for Java on Azure at Microsoft. He works to make sure Java developers are first class citizens at Microsoft and Microsoft is a first class citizen of the Java ecosystem.Reza has been an official Java technologist at Oracle. He is the author... Read More →


Wednesday October 6, 2021 20:00 - 21:00 CEST
#1 Main EN only

20:00 CEST

Micronaut Security
Micronaut has extensive support for securing access to your applications. In this talk we'll look at several approaches, including OAuth 2.0, OpenID Connect, JWT, and session-based authentication, as well as security configuration and customization. Through several demos you'll see how easy Micronaut makes implementing authentication and authorization.

Speakers
avatar for Burt Beckwith

Burt Beckwith

Principal Engineer, Oracle Labs
Burt Beckwith has been a software developer for over 20 years, most of that as a JVM developer. He is currently on the Micronaut core team at Oracle Labs and was previously on the Grails core team at SpringSource/VMware/Pivotal.


Wednesday October 6, 2021 20:00 - 21:00 CEST
#3 Java Cloud Native

20:00 CEST

Users Don't Have to Suffer in the Cloud
The cloud has a lot to offer organizations - this is unquestionable. It is clear - the cloud has extraordinary potential to disrupt how IT manages applications and how IT delivers services to end users. The strategies to move to the cloud for enterprises usually steer towards either migrating their data centers to IaaS and PaaS (think Azure or AWS) or fully replacing on-premises applications with SaaS alternatives (Salesforce, ServiceNow, Office365 for example). These strategies can introduce serious challenges for end-users. The impact to the end-user experience is often not considered in these plans. What if there was a third option? Where the user experience was centralized and the data integrity was preserved. There is. A hub and spoke architecture doesn't sacrifice user experience or data integrity and frees the enterprise to make the right technology decisions without impacting user adoption.

Speakers
avatar for Melissa Jurkoic

Melissa Jurkoic

CXO/Cofounder, addapptation/Diversify Thinking
Melissa has worked in the tech industry for over 20 years in roles ranging from Junior Software Engineer to her current role as the Chief Customer Experience Officer at addapptation. She holds a Bachelor’s in Computer Science from the University of New Hampshire and an executive... Read More →


Wednesday October 6, 2021 20:00 - 21:00 CEST
#5 Architecture

20:00 CEST

Hands-on intro to CQRS and Event Sourcing with Axon
The terms 'Command Query Responsibility Separation (CQRS)' and 'Event Sourcing (ES)' pop up often these days. But have you already tried building such a system yourself? The concepts by themselves are pretty straightforward. However, building the infrastructure components you need for CQRS and ES from scratch is challenging. And, more importantly, a waste of your valuable time. Axon provides numerous building blocks to support developers on their road towards a CQRS and ES-based application. Furthermore, it has been used in production for over a decade! In this session, we will live-code an application from scratch. By doing so, this talk shows you how to apply CQRS and ES in your projects, enabling you on to a journey towards microservices!

Speakers
avatar for Steven van Beelen

Steven van Beelen

Lead Developer, AxonIQ
Steven is a lead developer at AxonIQ with a keen interest in new and exciting technologies and methodologies. In the last couple of years, Axon Framework has fulfilled this interest; by its take on software architecture. This eventually led him to become a part of the AxonIQ team... Read More →


Wednesday October 6, 2021 20:00 - 21:00 CEST
#2 Main EN/DE

21:00 CEST

Java - unlimited in the cloud
Let’s remove the illusion of limits. Step back and rethink. Especially on boundaries that might just be in our head. Microsoft is one of the leaders in distributed Java and even has its own build of OpenJDK. Microsoft’s open-source contributions don't only focus on Java and the OpenJDK, but also Linux, VS Code, TypeScript, Kubernetes, and many more. We are where developers are. Inside Microsoft, we have also developed a strong open-source program over the past decade, making it easy for every team at Microsoft to choose to use, contribute to, and release open-source software. Many of our tools and approaches are available outside of Microsoft as well. It's an exciting time to use technology to build and deliver whatever you can imagine. We are building value together and welcome everyone to participate and go beyond limits.

Speakers
avatar for Sandra Ahlgrimm

Sandra Ahlgrimm

Cloud Developer Adovcate, Microsoft
Sandra works for Java developers at Microsoft. Ensuring that the Java efforts remain community-focused and data-driven, she loves to dive into the newest features. Sandra gives back to the community with learning content not only on MS Learn but also the 'Java on Azure YouTube' channel... Read More →


Wednesday October 6, 2021 21:00 - 22:00 CEST
#1 Main EN only
 
Thursday, October 7
 

09:00 CEST

System.out.println("USE A LOGGER")
Egal ob man eine kleine Library, ein komplexes Framework oder eine Anwendung für Endanwender entwickelt - Irgendwann kommt man an den Punkt dass man Information loggen möchte. Hier bietet die Java Community eine ganze Fülle an Lösungen: Neben dem java.util.Logging gibt es Libraries wie commons-logging, Log4J oder Logback. Wo liegen hier eigentlich die Unterschiede und Alleinstellungsmerkmale? Dazu kommt, dass ja eigentlich alle sagen, dass nur die Nutzung von slf4J “Best Practice” sei. Aber warum soll ich eine Abstraktion bei der Entwicklung einer konkreten Anwendung nutzen? Oder bietet slf4j vielleicht noch ganz andere Vorteile? Und als wenn das nicht schon genug Fragen wären wurde mit Java 9 einfach mal still und heimlich mit dem System.Logger ein neuer Logger ins OpenJDK integriert. Dieser Talk gibt einen verständlichen Leitpfaden durch den Logging Dschungel und zeigt ein paar Praktiken, die helfen das Logging von Libraries und Anwendungen in den Griff zu bekommen. Wenn du kurz davor bist aus Frust doch wieder System.out zu nutzen ist diese Session genau richtig für dich.

Speakers
avatar for Hendrik Ebbers

Hendrik Ebbers

Co-Founder, Karakun GmbH
Hendrik Ebbers (@hendrikEbbers) ist Java Champion, JCP Expert Group Member und als Rockstar-Speaker der JavaOne ausgezeichnet. Hendrik ist Co-Founder der Karakun AG und Gründer der JUG Dortmund sowie der Cyberland. Hendrik gibt auf der ganzen Welt Vorträge und Workshop zum Thema... Read More →


Thursday October 7, 2021 09:00 - 10:00 CEST
#2 Main EN/DE

09:00 CEST

Von Legacy zu Cloud Native, ohne Kubernetes
In vielen größeren Institutionen finden wir noch jede Menge Software, die eher monolithisch aufgebaut ist, die häufig in Applikations-Servern auf dedizierten virtuellen Maschinen von einem eher klassisch aufgestellten und organisatorisch separierten IT-Betrieb betrieben wird. In Fachzeitschriften, Online-Artikeln und Konferenzen wird vorgeführt, wie einfach es doch ist, einen Hello-World Spring Boot Microservice mit mehreren Instanzen auf Kubernetes zu deployen. Doch zurück im Unternehmen wird klar: sollte man es tatsächlich schaffen, alle notwendigen Personen davon zu überzeugen, ab sofort Kubernetes einzuführen, wird das für einen meist auch personell am Limit arbeitenden IT-Betrieb schnell zu einem Projekt mit vermutlich 1-2 Jahren Laufzeit (je nach Erfahrung), mit möglichen Seiteneffekten wie reduzierter Handlungsfähigkeit für das laufende Geschäft und dem Zurückstellen anderer Modernisierungsmaßnahmen. In diesem Vortrag werden wir die sich kontinuierlich entwickelnde (evolving) Architektur einer Anwendungslandschaft hin zu Cloud Native betrachten und dabei Werkzeuge kennen lernen für die schrittweise Anpassung der on-premise Infrastruktur, ohne Kubernetes.

Speakers
avatar for Stephan Kaps

Stephan Kaps

Leiter Softwareentwicklung, Bundesamt für Soziale Sicherung
Stephan Kaps leitet die Softwareentwicklung im Bundesamt für Soziale Sicherung und ist Gründer der Java User Group Bonn. Als Software-Architekt und Entwickler hat er seit 2002 mit Java zu tun. Weitere Schwerpunkte liegen in der Konzipierung und Optimierung von Software-Entwicklungsprozessen... Read More →


Thursday October 7, 2021 09:00 - 10:00 CEST
#4 DevOps

09:00 CEST

Chasing the Grail
As you probably already know, AOT and Graal JIT are not included by default in JDK 16. Is it all gone? Is it still possible to write your own JVMCI compiler or execute JavaScript inside the JDK? It would be nice to understand what is generally going on in the GraalVM development camp, as well as what the framework creators think. It will be useful for business to learn how the GraalVM licensing model is changing, and what alternatives have appeared now. Important changes are taking place in the area of ​​creating small container images. JDK 16 now has full musl support. But the task of minimizing the OS layer is relevant for both GraalVM and the native image, and is also successfully solved. At runtime, it is critical to understand how to measure, target, and improve the performance of microservices using the wide range of JVM and native image technologies available today. We'll cover techniques, metrics, options, and tools to help you optimize without changing your code. Overall, you will see a broader picture of the possibilities for creating the most efficient microservice containers of which Graal and its associated tools are a part.

Speakers
avatar for Dmitry Chuyko

Dmitry Chuyko

Performance Architect, BellSoft
Dmitry Chuyko is a Performance Architect at BellSoft, one of the most active corporate OpenJDK developers. Previously he worked on HotSpot JVM in Oracle. His experience with Java showed that the most interesting problems in applications find their solutions in the underlying platform... Read More →


Thursday October 7, 2021 09:00 - 10:00 CEST
#3 Java Cloud Native

09:00 CEST

Modularization: Foundation of Microservices and Monoliths
Modularization is the key to develop large systems. With the advent of Microservices, the discussion about this central concept started again - but recently also modularized monoliths emerged as an architectural style. This talk shows the classic concepts for modularization, for example from Parnas, and explains what can be learned from these approaches for the architecture work of modern systems.

Have a look at the Session Teaser!​​​

Speakers
avatar for Eberhard Wolff

Eberhard Wolff

Fellow, INNOQ
Eberhard Wolff has 15+ years of experience as an architect and consultant - often on the intersection of business and technology. He is a Fellow at innoQ in Germany. As a speaker, he has given talks at international conferences and as an author, he has written more than 100 articles... Read More →


Thursday October 7, 2021 09:00 - 10:00 CEST
#1 Main EN only

09:00 CEST

You may not need JavaScript
Single page applications (SPA) have become the for web application development. Angular, React, Vue.js and Ember.js are the best known representatives from this category of web frameworks. But does this client architecture fit every application? Or are there alternatives that may fit better and are less complex to develop? In the first part of the talk, the differences between SPAs and classic, server-side approaches are explained and the advantages and disadvantages are discussed. The second part reports on a current customer project in which the front end of a large ERP system had to be replaced by a modern web front end. The chosen framework is Vaadin Flow, a server-side web framework that makes development of web applications entirely in Java possible. First, the new architecture of Vaadin Flow, which is no longer based on GWT but on web components, is explained. Then it will be shown how configurable, form-based and data-centric web applications can be implemented very efficiently by using jOOQ as a database access layer.

Speakers
avatar for Simon Martinelli

Simon Martinelli

Software Renovator, 72 Services GmbH
Simon Martinelli is a passionate Java, performance optimization and application integration expert with more than 25 years of experience creating efficient programming solutions as a developer, architect, and technical lead. An active member of the Java community process, he has made... Read More →


Thursday October 7, 2021 09:00 - 10:00 CEST
#5 Web Development

10:00 CEST

Rolling Stones – vom Release überrollt
Jeder macht es, manche sogar mehrmals täglich. Aber nur wenige kennen die komplexen ineinander greifenden Mechanismen, die ein vollständiges Software Release ausmachen. Deshalb kommt es hin und wieder vor, das sich ein Paket in der automatisierten Verarbeitungskette querstellt. Mit ein wenig Theorie und einem typischen Beispiele aus dem Java Universum zeige ich, wie man ein wenig Druck aus dem Softwareentwicklungsprozess nehmen kann, um zu schlanken leicht automatisierten Prozessen gelangt.

Speakers
avatar for Marco Schulz

Marco Schulz

Build-, Configuration- and Release Management, Freiberufler
Marco Schulz studierte an der HS Merseburg Diplominformatik und twittert regelmäßig als @ElmarDott über alle möglichen technische Themen. Sein Schwerpunkte sind hauptsächlich Build und Konfiguration Management, Software Architekturen und Release Management. Seit über fünfzehn... Read More →


Thursday October 7, 2021 10:00 - 11:00 CEST
#4 DevOps

10:00 CEST

Brace for your next Race - Race conditions in Servlets and Controllers
Race conditions are not an issue of the past nor a scenario that people can find themself in only when deciding to develop a multithreading architecture. In our day-to-day programming sessions, we probably deal with multithreading more than one may think. What about that simple Controller you wrote with just few lines of code? Could it be leaking customer data? MVC Controllers methods are, by default, executed in a multithreaded environment where it is crucial to understand when a variable will be accessed and how to synchronize access to shared resources. Failing to do so can have an impact on the security of your application and lead to issues that are difficult to reproduce. Here we will demonstrate a race condition on MVC controller and j2EE Servlet as introduction to a live coding session; we will discuss strategies that can be applied to mitigate the issue and conclude with a summary of how these methods can have an impact on the application’s performance and some other possible alternative

Speakers
avatar for Giuseppe Trovato

Giuseppe Trovato

Security Researcher, Veracode
Giuseppe has always been fascinated by many aspects of Information Security and chose to focus on software security when he joined Veracode in 2014. He has spent his time building stuff, helping developers with the identification of compensating controls and providing support for... Read More →


Thursday October 7, 2021 10:00 - 11:00 CEST
#5 Web Development

10:00 CEST

Break free from maintenance hell with Clean Code
If you ever had to find the bug late night and asked yourself how to do it better next time. See this talk and find out you are not alone and there are even worse things to discover. See what you can do today to create a better world for future-you :) Spoiler Alert: some examples will make you laugh and then cry :) Robert C. Martin coined the term "Clean Code" in his eponymous book for software development. But what is clean code and what does this have to do with the maintainability of software? In this talk, you will find practical examples of how small improvements in "code cleanliness" can have very positive effects on the maintainability of your software. Using examples from more than 15 years of project experience, you will learn techniques that you can still use today in your code.

Speakers
avatar for Richard Fichtner

Richard Fichtner

CEO, XDEV Software GmbH
Richard Fichtner is a passionate Java developer with more than 15 years of experience in the software industry. He is involved in the open-source community to spread knowledge about Java technologies. He speaks at conferences such as Oracle Code / JavaOne / JCON / Clean Code Days... Read More →


Thursday October 7, 2021 10:00 - 11:00 CEST
#2 Main EN/DE

10:00 CEST

Multi Cloud Serverless with Micronaut & GraalVM
In this talk Micronaut creator, Graeme Rocher, will demonstrate how to develop Serverless applications in a completely Cloud agnostic way with Micronaut and deploy them efficiently with GraalVM native image.

Speakers
avatar for Graeme Rocher

Graeme Rocher

Architect, Oracle
Graeme Rocher is the creator of several popular Open Source projects including Grails (https://grails.org) and Micronaut (https://Micronaut.io) and co-author of "The Definitive Guide to Grails" (Apress - http://apress.com/book/view/1590599950). Graeme currently works as an Architect... Read More →


Thursday October 7, 2021 10:00 - 11:00 CEST
#3 Java Cloud Native

10:00 CEST

What I Wish I Knew About Maven Years Ago
Apache Maven is seen by many developers as the defacto build tool in the Java space. Since its early days back in April 2002, Maven has helped developers build projects and assemble artifacts. On the surface not much appears to have changed in the design, structure, and build file syntax, but in reality there are quite a good number of features that have been added through the years that make Maven a powerhouse. Come to this talk if you want to learn more about these hidden nuggets and make the most of your Maven builds.

Speakers
avatar for Andres Almiray

Andres Almiray

Senior Principal Product Manager, Oracle
Andres is a Java/Groovy developer and a Java Champion with more than 2 deades of experience in software design and development. He has been involved in web and desktop application development since the early days of Java. Andres is a true believer in open source and has participated... Read More →


Thursday October 7, 2021 10:00 - 11:00 CEST
#1 Main EN only

11:00 CEST

Micronaut und Spring - Konkurrenz oder Koexistenz?
Die Faszination um neue Java-Frameworks wie Micronaut ist ungebrochen. Der Einstieg ist leicht und mit wenigen Handgriffen hat man eine lauffähige Anwendung, vom Rest-Endpunkt bis zum Datenbankzugriff. Auch zum ersten GraalVM Native Image ist der Weg nicht mehr weit: Schnell hat man das Gefühl auf der Java-Überholspur zu sein. Im Alltag bekommt man nur leider viel zu selten die Gelegenheit eine Anwendung ganz neu ohne Altlasten aufzubauen. Die Vision von einer reinen Cloud orientierten Anwendungslandschaft ist zwar reizvoll, aber für die meisten Unternehmen noch in weiter Ferne. Und genau deshalb möchten ich unter die Lupe nehmen, wie gut sich Micronaut in bestehende technische und organisatorische Strukturen integrieren lässt. Ausgehend von typischen Spring-Anwendungen möchte ich die Aspekte Wissenstransfer (Wie kann ich vorhandenes Wissen transferieren?), Infrastruktur (Wie gut kann kann ich vorhandene Infrastruktur verwenden?) und Migrationspfade (Wie kann ich aus einer Spring-Boot-Anwendung eine Micronaut-Anwendung machen?) beleuchten. Wie gut funktionieren Micronaut und Spring im Zusammenspiel und welche Hürden gibt es in dieser Konstellation? Ich möchte einen Weg finden diesem Framework eine Chance zu geben, ohne auf bewährte Dinge verzichten zu müssen und der Cloud-optimierten Anwendungslandschaft Schritt für Schritt näher zu kommen.

Speakers
avatar for Pia Diedam

Pia Diedam

IT-Consultant, viadee AG
Pia Diedam ist seit 2017 Beraterin bei der viadee IT-Unternehmensberatung. Seit dem Studium der Wirtschaftsinformatik ist sie sowohl im internen Forschungs- und Entwicklungsbereich, als auch extern im Kundeneinsatz an Java-Projekten beteiligt. Sie ist begeistert von dem Zusammenspiel... Read More →


Thursday October 7, 2021 11:00 - 12:00 CEST
#3 Java Cloud Native

11:00 CEST

Turbo powered Web Apps - moderne Web Anwendungen mit plain HTML
HTML spielt in modernen Web Anwendungen nur die zweite Geige. JavaScript Frameworks wie Angular oder React spielen die erste. Aber muss das so sein? Mit Turbo (https://turbo.hotwire.dev/) stellt Basecamp (um Rails Gründer David Heinemeier Hansson) einen alternativen Ansatz vor, um moderne Web Anwendungen mit plain HTML zu entwickeln. Das Grundprinzip von Turbo: Über die Leitung geht nur HTML, gerendert wird auf dem Server. An einem praktischen Beispiel lernt Ihr mit Turbo eine moderne Web Anwendung zu bauen, nur mit HTML. Das Beispiel geht von Login und Navigation mit Turbo Drive bis zum Formular mit Turbo Streams. Ihr sollt in der Lage sein zu beurteilen, ob der Turbo Ansatz für Web Anwendungen mit plain HTML für Euch das richtige ist. Vielleicht steckt dann bald auch Turbo Power in Eurer neuen oder alten Web App.

Speakers
avatar for Jan Stamer

Jan Stamer

Solution Architect, Commerzbank AG
Jan Stamer ist Solution Architect bei der Commerzbank AG. In einem agilen Umfeld sorgt er dafür, dass auch komplexe Vorhaben zu einer gemeinsamen (und nachhaltigen) Lösung führen. Er nutzt den gesamten Commerzbank-Technologiestack – von Java, Spring und Hibernate über Kotlin... Read More →


Thursday October 7, 2021 11:00 - 12:00 CEST
#5 Web Development

11:00 CEST

Dirty Tests And How To Clean Them
We write tests and code for other people. Tests are code too, and both should be clean. As a clean code fanatic, I see it as a personal mission to go around preaching how powerful clean code is. But unfortunately, it seems that test code is not considered "real code", and therefore is not considered "dirty". In this session, we'll talk about concrete examples of anti-patterns in tests, and how to clean them up. We'll see how clean code principles apply directly to tests. And that's true for all tests - from unit to end-to-end, and regardless of who writes them - developers and testers. We'll see those in action. "Clean code looks like it was written by someone who cares.", said Michael Feathers. Test code may even be more important to write cleanly for that reason.

Speakers
avatar for Gil Zilberfeld

Gil Zilberfeld

Agile Testing Consultant, TestinGil
Gil Zilberfeld (TestinGil) has been in software since childhood. With more than 25 years of developing commercial software, he has vast experience in software methodology and practices. Gil has been applying agile development principles for software development more than a decade... Read More →


Thursday October 7, 2021 11:00 - 12:00 CEST
#1 Main EN only

11:00 CEST

Java inside Application Containers, System Containers and VMs. Differences and Use Cases
The benefits of virtualization and cloud technologies already became clear with all published articles and million of speeches. However, more available options produce the "problem of choice". There is a question which periodically comes up - what virtualization technology to choose for a specific use case. In this session, we'll analyze the difference of running Java projects inside application containers, system containers and VMs. We will cover the peculiarities in deployment, resource usage efficiency, cloud interoperability and security for each type, as well as discuss what options are more appropriate for different cases.

Speakers
avatar for Ruslan Synytsky

Ruslan Synytsky

CEO, Jelastic
CEO and co-founder of Jelastic PaaS, a company that delivers a turnkey multi-cloud platform for ISVs, MSPs, and cloud hosting providers. Java Champion and two-times Duke’s Choice Award winner. Expert in large-scale distributed applications and enterprise platforms. Previously, designed... Read More →


Thursday October 7, 2021 11:00 - 12:00 CEST
#4 DevOps

11:00 CEST

Will Git Be Around Forever? A List of Possible Successors
In 2010, only Linux kernel committers and other early adopters used Git. Almost everyone else used Subversion. Ten years later, Git is the most popular product. Which makes me wonder: what will we use another ten years from now? And what would YOU want from your version control software in 2030? More speed? Better collaboration support? No merge conflicts ever? In this talk I'll discuss a few post-Git products, including Fossil, Plastic and Pijul, and their support for the features we so dearly desire. I'll also try to predict which one will be 'the top dog' in 2030. So attend this session if you're excited about the future of version control and if you want to have a shot at beating even (!) the early adopters. Now if it turns out I was right, remember that you heard it here first. 😀

Have a look at the Session Teaser!​​​

Speakers
avatar for Hanno Embregts

Hanno Embregts

IT Consultant, Info Support
Hanno Embregts is a Java Developer, Speaker and Teacher at Info Support (the Netherlands). He has over 13 years experience with both front- and back-end development, with a special interest in automating the software development process to the fullest. He likes his work best when... Read More →


Thursday October 7, 2021 11:00 - 12:00 CEST
#2 Main EN/DE

12:00 CEST

Spring Data JPA - Das Schweizer Taschenmesser für den Datenzugriff
Spring Data JPA ist seit vielen Jahren Standard in vielen Applikationen. Die Konzepte von JPA werden konsequent und spring-getreu weiter vereinfacht und bieten eine sehr gute Developer-Experience. Insbesondere für Einsteiger ist es aber nicht immer einfach festzustellen, welcher Weg des Datenzugriffs sich im konkreten Fall anbietet: Reichen mir die Repository Interface Methoden oder benötige ich die Criteria API? Gibt es überhaupt eine Möglichkeit, meine Anfrage per Code zu formulieren oder muss ich doch JPQL oder sogar eine native Query verwenden? Und vor allem: Wie setze ich all das um? Neben der Vorstellung verschiedener Zugriffsmöglichkeiten werden Entscheidungsregeln diskutiert um im konkreten Anwendungsfall die passende Lösung zu identifizieren.

Speakers
avatar for Julius Mischok

Julius Mischok

CTO, Mischok GmbH
Julius Mischok ist Geschäftsführer der Mischok GmbH in Augsburg. Seine Kernaufgaben sind Prozessentwicklung, sowie Coaching und Schulung der Entwicklungsteams. Aktuell fokussiert sich seine Arbeit auf die Frage, wie Software schnell und mit einer maximalen Wertschöpfung produziert... Read More →


Thursday October 7, 2021 12:00 - 13:00 CEST
#2 Main EN/DE

12:00 CEST

Automate an idea to production using Spring Boot apps
Imagine that you're an infrastructure manager who's been asked to provision your Spring Boot resources by using Terraform. In this session, you’ll learn how to automate Spring Boot Apps from an idea to Production. We’ll cover: - Provisioning a database and an Azure App Service instance using Terraform and GitHub Actions - Configure your repo to build and deploy your application on-demand. At Microsoft we encourage you to use the tools and frameworks that you know and love - We go to where developers are! You love GitHub - Now, you can learn how to use GitHub Actions with Terraform to provide the automation you need for your Spring Boot apps on Azure. So, start your journey now with "Automate an idea to production using Spring Boot apps."

Speakers
avatar for Rory Preddy

Rory Preddy

Microsoft Developer Advocate, Microsoft
Rory works in the Developer Relations team at Microsoft as a Senior Cloud Advocate. Cloud Advocates use their deep research skills to help professional cloud developers discover and successfully use Microsoft’s platforms. A seasoned speaker whose talks are both meaningful and humorous... Read More →


Thursday October 7, 2021 12:00 - 13:00 CEST
#4 DevOps

12:00 CEST

Jakarta EE Core Profile - A Slimmer Jakarta EE
The new Jakarta EE Core Profile proposed for Jakarta EE 10 will enable smaller runtimes that are suitable for microservices to be certified as Jakarta EE compatible. The new profile will also aim to be an even better fit for compiling to native images. Join this session for the latest updates of the progress with Jakarta EE Core Profile and Jakarta EE 10. Who knows, there may even be a demo.

Speakers
avatar for Ivar Grimstad

Ivar Grimstad

Jakarta EE Developer Advocate, Eclipse Foundation
Ivar Grimstad is the Jakarta EE Developer Advocate at Eclipse Foundation. He is a Java Champion and JUG Leader based in Sweden. Ivar is the PMC Lead for Eclipse Enterprise for Java (EE4J) and involved in the Jakarta EE Working Group. He is also one of the community representatives... Read More →


Thursday October 7, 2021 12:00 - 13:00 CEST
#1 Main EN only

12:00 CEST

Serverless Java on Knative with Quarkus
This talk consists of two parts: a theoretical introduction and a short live coding session. We will start with some basics related to Knative Serving and Eventing. Then we will focus on integration between Knative Eventing and Apache Kafka, and see how to run Kafka on Kubernetes. How Quarkus framework may simplify and speed up our development on Kubernetes? After a short introduction, we will focus especially on serverless features offered by Quarkus Funqy and integration with Kafka through the SmallRye Reactive Messaging extension. In the live coding session part, we will implement a simple SAGA pattern between three applications written in Quarkus and run it on Knative.

Speakers
avatar for Piotr Mińkowski

Piotr Mińkowski

Solution Architect, Red Hat
Piotr currently works as a Solution Architect at Red Hat. He has several years of experience as a Java Developer and Software Architect. He is an enthusiast of new technologies around Java, microservices, containers, and Kubernetes. Blogger at https://piotrminkowski.com. Author of book "Mastering Spring Cloud... Read More →


Thursday October 7, 2021 12:00 - 13:00 CEST
#3 Java Cloud Native

12:00 CEST

Web Components for Java Developers
When you inspect YouTube’s code in the browser, you’ll see HTML elements such as ytd-thumbnail and ytd-player. These elements are called Web Components and you’ll find them not only on YouTube but websites such as GitHub and Google Patents. In this talk, you’ll learn what Web Components are, what the three standards that enable them are, how to code them in vanilla JavaScript, and how to use them from Java without having to use HTML or JavaScript. All this in a talk with more code than slides!

Speakers
avatar for Alejandro Duarte

Alejandro Duarte

Developer Relations Manager, Vaadin
Alejandro Duarte is a Software Engineer, published author, DevRel Manager at Vaadin, programmer since age 13, and open-source software development enthusiast. You can follow him on Twitter @alejandro_du.


Thursday October 7, 2021 12:00 - 13:00 CEST
#5 Web Development

13:00 CEST

JUnit Tests? Excellent! – Die Eigenschaften guter Tests
Automatisierte Tests haben viele Vorteile. Sie helfen unter anderem die Fehlerzahl zu reduzieren, geben Sicherheit bei Änderungen, dienen als "Documentation as Code", helfen die Codequalität zu verbessern etc. Doch wenn du nicht aufpasst können deine Tests dich auch mal in falscher Sicherheit wiegen. Und nicht selten kommt es vor dass Tests zum Ärgernis oder gar zum Wartungs-Alptraum werden. Worauf du achten solltest damit das nicht passiert, und was gute Tests allgemein ausmacht, erfährst du in dieser Session.

Speakers
avatar for Stefan Waldmann

Stefan Waldmann

Senior Software Engineer, doubleSlash GmbH
Stefan ist leidenschaftlicher Java-Entwickler mit über 15 Jahren Erfahrung in der Entwicklung von Geschäftsanwendungen in den Bereichen Webanwendungen und Backend Services. Neuerungen im Bereich von Java und anderen JVM-Sprachen faszinieren ihn. Besonders begeistern ihn gute Code-Qualität... Read More →


Thursday October 7, 2021 13:00 - 14:00 CEST
#2 Main EN/DE

13:00 CEST

Web Components in der Praxis
Web Components versprechen leichtgewichtige, frameworkunabhängige UI Komponenten. Doch was wird aus diesem Versprechen in der Praxis? Für welche Teams und Projekte sind Web Components die richtige Wahl und welchen Einfluss haben sie auf die Entwicklung? Wie entwickelt man eine eigene Komponentenbibliothek? Patrick Schröer und Christian Siebmanns berichten aus verschiedenen Projekten und geben Einblick in die Vorteile, Herausforderungen und Erfahrungen aus der Entwicklung von Web Components.

Speakers
avatar for Patrick Schröer

Patrick Schröer

viadee AG
Patrick Schröer ist bei der viadee IT-Unternehmensberatung als Berater in verschiedenen Rollen in der Entwicklung im Einsatz. Sein Schwerpunkt liegt im Bereich Mobile- und Web-Engineering, in dem er auch als Themenverantwortlicher tätig ist.
avatar for Christian Siebmanns

Christian Siebmanns

IT Berater, viadee IT-Unternehmensberatung
Christian Siebmanns ist Berater bei der viadee IT-Unternehmensberatung. Er hat seinen Schwerpunkt beim Einsatz in Kundenprojekten im Webumfeld und interessiert sich für alles, mit dem Nutzer interagieren können.


Thursday October 7, 2021 13:00 - 14:00 CEST
#5 Web Development

13:00 CEST

Automation is simple now using Devops
The data held in your Databases is an integral part of every application, so why aren’t we talking about it more when it comes to DevOps, and including DBAs in this important conversation? In this session learn why the database has been left behind and the special challenges it presents when it comes to delivering value quickly. Explore the similarities to application development and see that even though there are challenges, it is possible to include your database in DevOps processes such as version control, continuous integration, and continuous delivery.

Speakers
avatar for Osama Mustafa

Osama Mustafa

cloud architecture, Gurus Solutions
Osama Mustafa is Founder of Gurus Solutions Company, First Oracle ACE Director In the middle-east, Creator/Director of Jordan Amman Oracle User Group the first Group in Jordan related to oracle technology, Author of two Technology Book, Osama is one of the leader for Cloud Technology... Read More →


Thursday October 7, 2021 13:00 - 14:00 CEST
#4 DevOps

13:00 CEST

How Class Data Sharing Can Speed up Your Jakarta EE Application Startup
Java Byte code is OS independent, which means your application's startup takes more time than a native image. Using the Class Data Sharing functionality introduced in more recent versions of the JVM, you can prepare your application to load very fast. In this presentation, I'll go into more detail about what Class Data Sharing is and the differences between the OpenJDK and OpenJ9 versions. Using some Jakarta EE demo applications, you will see gains that you can achieve and reduce memory footprint in Docker containers by sharing memory.

Speakers
avatar for Rudy De Busscher

Rudy De Busscher

Developer Advocate, Payara
Rudy loves to create (web) applications with the Jakarta EE platform and MicroProfile implementations and is currently working for Payara as Product Manager and Developer Advocate. He is active in the IT industry for more than 20 years and is a big fan of OpenSource. He is also passionate... Read More →


Thursday October 7, 2021 13:00 - 14:00 CEST
#3 Java Cloud Native

13:00 CEST

MicroProfile 4.0 and Beyond
MicroProfile has evolved itself to be a standard body for developing Cloud Native APIs. MicroProfile 4.0 is the latest release so far. In this session, Emily is going to bring you up to date with the new features in MicroProfile 4.0 with a live demo and briefly discuss what is next for MicroProfile. Come to this session to get yourself updated with the latest news on MicroProfile.

Speakers
avatar for Emily Jiang

Emily Jiang

Liberty Cloud Native Architect and Chief Advocate, IBM
Emily is a Java Champion, Liberty Cloud Native Architect and Chief Advocate in IBM. She is a MicroProfile guru and has been working on MicroProfile since 2016 and leads a number of specifications including MicroProfile Config, Fault Tolerance and help with many other specs. She is... Read More →


Thursday October 7, 2021 13:00 - 14:00 CEST
#1 Main EN only

14:00 CEST

The Quick Wins of DevSecOps
I always like to be out in the forest, enjoy the quiet, and pursue my thoughts undisturbed. And recently, a question occurred to me that I get asked again and again at conferences, meetups or workshops: The question is almost always: What are the quick wins or low hanging fruits if you want to deal more with the topic of security in software development? And I want to answer this question right now!

Speakers
avatar for Sven Ruppert

Sven Ruppert

Dev Advocate, JFrog
Sven Ruppert has been coding Java since 1996 in industrial projects, is working as a Developer Advocate for JFrog. He is regularly speaking at Conferences worldwide and contributes to IT periodicals, as well as tech portals. He was working for over 15 years as a consultant worldwide... Read More →


Thursday October 7, 2021 14:00 - 15:00 CEST
#4 DevOps

14:00 CEST

Jakarta EE Meets NoSQL at the cloud age
Let’s be honest: the amount of data collected by applications nowadays is growing at a scary pace. Many of them need to handle billions of users generating and consuming data at an incredible speed. Maybe you are wondering how to create an application like this? What is needed? What benefits can you take from this reality to your project? This session shows how Jakarta EE can meet these needs when you’re working with NoSQL databases in the cloud. It’s the same approach used by some of the biggest companies in the world to store, analyze, and get results from really crazy amounts of data. No matter your project size, you can take it to the next level today.

Speakers
avatar for Otavio Santana

Otavio Santana

Distinguished Engineer, Zup Innovation
Empowering developers worldwide to deliver better software faster, scalable in the Cloud. Otavio is a passionate software engineer focused on Cloud and Java technology. He has experience mainly in persistence polyglot and high-performance applications in finances, social media, and... Read More →


Thursday October 7, 2021 14:00 - 15:00 CEST
#1 Main EN only

14:00 CEST

Learning by writing code and test-cases
During development and writing test-cases you can improve your knowledge and learn a lot about - JAVA-basics and language-specific features - architecture/design of your project - usability of your code and libraries - wrong assumptions about how your code works This talk takes you to a journey about how you can improve the quality of your code by developing basic test-cases first and try out a scenario beforehand. While doing this you can discover some nice features and unexpected restrictions of the JAVA-language. We will have a look at some code-samples, the according test-cases written in JUnit 5 and explore impacts and possible solutions. We will also have a look at the limits of testability and reachability of a high test-coverage.

Speakers
avatar for Joachim Reiter

Joachim Reiter

Freelancer and founder, kreativgeist.at
Joachim Reiter develops since 1997 relational databases, automatic generation of input-forms, tables and queries including their relations. Due to his studies at the university of technology in graz he investigated the possibilities to versionize records in a database. In the activity... Read More →


Thursday October 7, 2021 14:00 - 15:00 CEST
#2 Main EN/DE

14:00 CEST

React in 40 minutes
You've heard about React, the user interface library developed by Facebook? And you're wondering how to use it beyond the “Hello, World” stage? Then this talk is for you! Join me in an action-packed session full of live code examples where we'll discover how you can use React to build the hottest web applications while keeping your head cool. When you leave the room, you'll know enough to build real-world web applications!

Speakers
avatar for Maarten Mulders

Maarten Mulders

IT Consultant, Info Support
Passionate architect, senior developer and trainer; also Oracle Groundbreaker Ambassador. Passionate about "building the right thing" and "building the thing right". Focusing on lean and elegant solutions. Love to share new ideas and knowledge. Outside work, I appreciate creating... Read More →


Thursday October 7, 2021 14:00 - 15:00 CEST
#5 Web Development

14:00 CEST

Thriving in the cloud: Going beyond the 12 factors
Enabling applications to really thrive (and not just survive) in cloud environments can be challenging. The original 12 factor app methodology helped to lay out some of the key characteristics needed for cloud-native applications... but... as our cloud infrastructure and tooling has progressed, so too have these factors. In this session we'll dive into the extended and updated 15 factors needed to build cloud native applications that are able to thrive in this environment, and we'll take a look at open source technologies and tools that can help us achieve this.

Have a look at the Session Teaser!​​​

Speakers
avatar for Grace Jansen

Grace Jansen

Developer Advocate, IBM
Grace is a Developer Advocate at IBM, working with Open Liberty and Reactive. She's been with IBM since graduating from University with a Biology Degree. Grace enjoys bringing a varied perspective to her projects, using her knowledge of biological systems to simplify complex software... Read More →


Thursday October 7, 2021 14:00 - 15:00 CEST
#3 Java Cloud Native

15:00 CEST

Keynote | Quarkus Deep-Dive
This keynote talk dives deep into the internals of Quarkus and explains how its unique architecture makes it different from other frameworks. We will start with an overview of the architecture, then cover how extensions work, and finally go in-depth on the internals of developer productivity features such as continuous testing and Dev Services. By the end of the talk, we will have covered how Quarkus gives you the best of both worlds, with a first-class development experience that still results in small optimized applications.

Speakers
avatar for Stuart Douglas

Stuart Douglas

Senior Principal Software Engineer, Red Hat
Stuart is one of the founders of the Quarkus project and has more than a decade of experience working on Java middleware. In addition to his work on Quarkus, Stuart is the co-lead of the Jakarta Servlet Specification and founded the Undertow web server, as well as being a major contributor... Read More →


Thursday October 7, 2021 15:00 - 16:00 CEST
#1 Main EN only

16:00 CEST

HTML over the wire
Single Page Applikationen mit Frameworks wie React, Angular oder Vue.js ermöglichen dank umfangreicher Komponenten Bibliotheken wie Fluent UI oder Material Design ansprechende und komplexe Oberflächen zu erstellen. Allerdings erhört die Verwendung solcher Frameworks die Komplexität bei Webanwendungen erheblich. Typischerweise wird serverseitig eine REST-Schnittstelle implementiert. Dadurch wird es erforderlich den Zustand der Anwendung auf dem Server und im Client konsistent zu halten, was die Komplexität weiter erhöht. Wenn dann auch noch die Webseite serverseitig gerendert werden soll, führt das meistens noch zu einem zusätzlichen NodeJs-Server.
Gibt es noch andere Optionen, die schnelle Interaktion von SPA mit serverseitigem rendern der Webseiten zu kombinieren? Schaut man sich zum Beispiel, wie schnell Amazon die Produktlisten beim Stöbern aktualisiert, stellt man fest, dass dort fertig erzeugtes HTML via AJAX geladen und in den bestehenden DOM eingebaut wird. Die E-Mail-Anwendung HEY von Basecamp geht noch ein Schritt weiter und sendet fertig erzeugtes HTML über WebSockets.
Ich möchte zeigen, wie man mit "HTML over the Wire" moderne Web-Applikationen bauen kann. Dabei nutzen wir die Bibliotheken Turbo und Stimulus.

Speakers
avatar for Nicolai Mainiero

Nicolai Mainiero

Expert Software Developer, sidion GmbH
Nicolai Mainiero ist Diplom-Informatiker und arbeitet als Software Developer bei der Firma sidion. Er entwickelt seit über zwölf Jahren Geschäftsanwendungen in Java und Kotlin für unterschiedlichste Kundenprojekte. Dabei setzt er vor allem auf agile Methoden wie Kanban. Außerdem... Read More →


Thursday October 7, 2021 16:00 - 17:00 CEST
#5 Web Development

16:00 CEST

Magische Schichten - Das Layered Entity Konzept
Immer wieder werden wir in Verbindung mit MicroStream nach Funktionen gefragt wie zum Beispiel “Logging“, “Versionierung“ oder “Concurrency“. Wir müssen dann immer darauf verweisen, dass diese kein Kernfunktionalität einer Datenbank ist, sondern eher Teil der Businesslogik der eigentlichen Applikation. Um aber trotzdem eine solche Funktionalität out of the box anbieten zu können oder ein System zu bieten welches sich durch Plugins erweitern lässt, haben wir ein mehrschichtiges entity Konzept (Layered Entities) entwickelt. In diesem Vortrag geht es darum wie dieses Konzept grundsätzlich funktioniert, wie man es verwendet und welche Funktionalität bereits implementiert ist. Zusätzlich kann dieses Konzept natürlich auch Anregung für das spätere Entity design sein.

Speakers
avatar for Christian Kuemmel

Christian Kuemmel

Project Manager, Senior Software Consultant, MicroStream Software GmbH
Projektleiter, Senior Software Consultant 12 Jahre im Java Umfeld tätig 8 Jahre Erfahrung im Umgang mit Hibernate Seit ca. 2 Jahren bei MicroStream


Thursday October 7, 2021 16:00 - 17:00 CEST
#2 Main EN/DE

16:00 CEST

Microservices mit Micronaut
Startup-Zeiten von Containern werden bei elastischer Skalierung in der Cloud immer wichtiger – wer möchte schon 2 Minuten warten, bis eine neue Instanz des Services erscheint? Hier kann der Shooting Star von Java-basierten Microservices, Spring Boot, nicht glänzen. Systembedingt steigt die Startzeit des Containers mit der Menge der Klassen auf dem Classpath. Auch der Speicherverbrauch einer Spring Boot Anwendung ist nicht gerade gering. Micronaut, erschaffen von den Machern des Grails-Frameworks, behauptet, diese Probleme in den Griff zu bekommen. In dem Talk sehen wir uns an, wie sich Microservices mit Micronaut entwickeln lassen und prüfen, ob es die Versprechen hält.

Speakers
avatar for Moritz Kammerer

Moritz Kammerer

Expert Software Engineer, QAware
Moritz Kammerer arbeitet als Expert Software Engineer bei der QAware GmbH in München. Er ist begeisterter Backend-Entwickler, vor allem auf der JVM. Neben Java hat es ihm die Programmiersprache Kotlin angetan. Außerdem ist er Autor diverser Open-Source-Projekte.


Thursday October 7, 2021 16:00 - 17:00 CEST
#3 Java Cloud Native

16:00 CEST

Jakarta EE Security - Sailing Safe in Troubled Waters
Security in Jakarta EE has long been under used and under specified. Existing specifications ranged from overly complex to non-existent. The result was few people used security standards. Java EE 8 changed that with JSR 375. Its evolution Jakarta Security facilitates portable application security integrated with container security. Allowing applications to treat authentication mechanisms like OAuth or OpenID Connect same as built-in container mechanisms like FORM or container-based access to a URL and features like @RolesAllowed and isUserInRole automatically work as expected. It depends on CDI, and lower level SPIs Jakarta Authentication and Jakarta Authorization. Jakarta Authorization defines an SPI for authorization based security checking if a subject has given permissions and algorithms to transform security constraints for containers including Servlets or Enterprise Beans into them. Jakarta Authentication defines an SPI for authentication that interacts with a container’s environment to obtain the caller’s credentials, validate them and pass an authenticated identity (e.g. name, groups,...) to the container. This hands-on session is intended to get attendees up to speed with the state of Jakarta Security specs, demonstrate compatible implementations like Soteria, Exousia and others including Eclipse Glassfish or Tomcat. We will ask the audience for their opinion and thoughts what else they would like to see in the Security specs with Jakarta EE 10 and beyond.

Speakers
avatar for Ivar Grimstad

Ivar Grimstad

Jakarta EE Developer Advocate, Eclipse Foundation
Ivar Grimstad is the Jakarta EE Developer Advocate at Eclipse Foundation. He is a Java Champion and JUG Leader based in Sweden. Ivar is the PMC Lead for Eclipse Enterprise for Java (EE4J) and involved in the Jakarta EE Working Group. He is also one of the community representatives... Read More →
avatar for Werner Keil

Werner Keil

Director, CATMedia UG & Co. KG
Werner Keil is a Cloud Architect, Eclipse RCP and Microservice expert for a large bank. Helping Global 500 Enterprises across industries and leading IT vendors. He worked for over 30 years as IT Manager, PM, Coach, SW architect and consultant for Finance, Mobile, Media, Transport... Read More →


Thursday October 7, 2021 16:00 - 17:00 CEST
#1 Main EN only

16:00 CEST

State of the Java Metrics Libraries
Java developers have to choose from a variety of libraries when they want to export metrics in their Java applications. There is the MicroProfile standard that emerged out of the popular Dropwizard library. There is Micrometer which was developed as part of the Spring framework but is more and more adapted beyond the Spring ecosystem. And there is the Java client library provided by the Prometheus project itself. This talk gives an overview of the current state of Metrics libraries in the Java ecosystems. We present the differences, pros, and cons of the current options, and highlight some points that should be considered when deciding which library to choose.

Speakers
avatar for Fabian Stäber

Fabian Stäber

Sr. Engineering Manager, Instana
​​​​Dr. Fabian Stäber is engineering manager and monitoring enthusiast at Instana in Munich.  He recently became maintainer of the Java client library of the Prometheus project.Fabian is excited about Java, distributed systems, operations, and figuring out how things work... Read More →


Thursday October 7, 2021 16:00 - 17:00 CEST
#4 DevOps

17:00 CEST

Java meets TypeScript: building a full-stack web app with Spring Boot and LitElement
In the presentation, you'll learn how to build a full-stack web app step-by-step from scratch. Vaadin Fusion is a new unique web framework designed for Java backends. It combines a Spring Boot backend with a TypeScript-based LitElement frontend. It includes 40+ customizable UI components, type-safe server communication, and preconfigured build tooling–everything you need for productive and enjoyable development.

Speakers
avatar for Marcus Hellberg

Marcus Hellberg

Head of Community, Vaadin
Marcus heads the open-source community team at Vaadin. He's a long-time Java and web developer, always interested in learning new things. Marcus loves teaching developers about cool new technologies and has presented at over 50 international conferences and user groups.


Thursday October 7, 2021 17:00 - 18:00 CEST
#5 Web Development

17:00 CEST

Landscape of MicroProfile and Jakarta EE Tools
MicroProfile seeks to optimize enterprise Java for microservices architecture and its APIs are gaining momentum and popularity. Jakarta EE is an open set of APIs that enables the worldwide community of Java developers to build applications for enterprises. Both MicroProfile and Jakarta EE are often used together to develop cloud-native Java applications. Then, are tools available for developers to easily build applications with MicroProfile and Jakarta EE? In this session, we will examine the tools that are available to make your life easier as you code MicroProfile and Jakarta EE-based applications. These tools help developers throughout the development lifecycle, from creating a new application, working with compatible runtimes and your favourite editor, to testing your application. Join us to learn about what's out there, talk about what's coming, and see these tools in action.

Speakers
avatar for YK Chang

YK Chang

Developer Advocate & Architect, IBM
Yee-Kang (YK) Chang is the lead developer advocate for IBM's application platform and the developer experience architect for Open Liberty. He contributes to various open source projects like Eclipse Language Servers for MicroProfile & Jakarta EE and Open Liberty and is keen on how... Read More →
avatar for Kathryn Kodama

Kathryn Kodama

Software Developer, Open Liberty Developer Experience, IBM
Kathryn is a software developer on the Open Liberty Developer Experience team at IBM Canada. She has contributed to a number of open-source projects within the MicroProfile and Jakarta EE community, such as the Language Server for MicroProfile, the Jakarta EE Language Server, and... Read More →


Thursday October 7, 2021 17:00 - 18:00 CEST
#1 Main EN only

17:00 CEST

Microservices running natively on ARM devices
During the Spring lockdown, I had plenty of time to try the latest Quarkus framework on aarch64 architecture. That leads to millions of opportunities in the IT market from a technical standpoint. Moreover, Quarkus native apps require 90% fewer resources to startup as well as at runtime, which perfectly fits into the IoT devices' use-cases. During the talk I’ll show you how to: - Setup the environment on an IoT device (RPi) for your Quarkus native application - Compile your application for ARMv8 devices - Run a Quarkus native application in a container on an IoT device

Speakers
avatar for Andrea Battaglia

Andrea Battaglia

Partner Technical Manager, Red Hat
Andrea is an Italian folk, living in Southern Italy, working in the IT industry since 2000. As former technical head of Red Hat services for App Modernization in EMEA, currently trains partners in the DX approach and Cloud-Native Development. Passionate for technology, he is always... Read More →
avatar for Mattia Mascia

Mattia Mascia

Principal Consultant, Red Hat
Mattia Mascia, Red Hat Principal Consultant with over 14 years of enterprise IT experience, has deep knowledge of open source software in cloud, middleware, integration. He is an OpenShift specialist and technically competent developer who consistently strives for quality in his work... Read More →


Thursday October 7, 2021 17:00 - 18:00 CEST
#3 Java Cloud Native

17:00 CEST

Releasing at the speed of light
Your project has reached that stage when it's a good idea to post binaries, but new questions appear such as where should they be posted? How do make it easier for users to install and discover your binaries? Where should releases be announced? Most importantly, can answers to these question be automated? Enter JReleaser, a tool that provides answers to these questions and more. JReleaser may be used to create GiHub/GitLab/Gitea releases and publish binaries that can be consumed from different distribution channels such as Homebrew, Snap, Scoop, and more. Once published, the release cab be automatically announced on Twitter, Slack, Gitter, Discord, and other communication channels. Come to this session to learn how JReleaser can help you release, publish, and announce binaries with ease, and fast!

Speakers
avatar for Andres Almiray

Andres Almiray

Senior Principal Product Manager, Oracle
Andres is a Java/Groovy developer and a Java Champion with more than 2 deades of experience in software design and development. He has been involved in web and desktop application development since the early days of Java. Andres is a true believer in open source and has participated... Read More →


Thursday October 7, 2021 17:00 - 18:00 CEST
#4 DevOps

17:00 CEST

TDD: seriously, try it!
Have you heard of TDD? Are you interested or familiar with this practice but have never been able to understand it? Join this session to see the benefits of Test-Driven Development (TDD), understand how it works and what the benefits are of using it. We will see in a more detailed approach this way of developing software, where our software is always built guided by tests. We will go over some history about TDD, which is the main process we must follow when we work with this mechanic and the rules that surround it. We will also list the main advantages and disadvantages that most developers who practice TDD find and whether the arguments in favour add up to more than those that subtract. Finally, we will review some good habits and practices when applying TDD and see how to do it step by step with an example of "live" coding session with Java. At the end of the session, I hope that you will have a wider understanding of what TDD is, what advantages it brings, why it is interesting to master it and also that you will take with you some tricks and good practices to be able to apply them in your day-to-day life when writing code 😉

Speakers
avatar for Nacho Cougil

Nacho Cougil

Senior Software Engineer, Dynatrace
Nacho is a software engineer from Barcelona, fan of TDD and XP practices that has been working with Java and other web technologies before the effect 2000. He had experience in different roles in the IT world ('guy-for-everything', developer, team leader, project manager and CTO... Read More →


Thursday October 7, 2021 17:00 - 18:00 CEST
#2 Main EN/DE

18:00 CEST

Effektive Lasttests mit DSL-basierten OpenSource Werkzeugen
Neben den klassischen Schutzzielen Vertraulichkeit und Integrität ist auch das Schutzziel Verfügbarkeit bei bestimmten Anwendungen nicht minder wichtig, aber oftmals nicht ausreichend vor Go-Live geprüft. Gerade in agilen Projekten mit häufigen Releases können auch vermeintlich kleine Änderungen unter Umständen unerwartete Auswirkungen auf die Performance und den Ressourcenverbrauch haben. In diesem Vortrag wird auf ein neues OpenSource Werkzeug zur DSL-basierten Erstellung von Lasttestszenarien anhand praktischer Beispiele eingegangen und die ermöglichte Flexibilität DSL-basierter Lasttests bei agilen Projekten diskutiert. Hiermit können im Optimalfall die Lasttestszenarien analog der Codebasis im Projekt gleichermaßen evolvieren und mittels Integration in CI/CD-Pipelines eine Baseline sicherstellen, um Projekte vor unerwarteten Last- oder Ressourcenproblemen im Rahmen eines Go-Lives zu bewahren.

Speakers
avatar for Christian Schneider

Christian Schneider

Freelancer, Christian Schneider
Christian has pursued a successful career as a freelance software developer since 1997 and expanded it in 2005 to include the focus on IT security. His major areas of work are penetration testing, security architecture consulting, and threat modeling. As a trainer, Christian regularly... Read More →


Thursday October 7, 2021 18:00 - 19:00 CEST
#3 Java Cloud Native

18:00 CEST

Expanding the scope of refactoring to fix Java security problems
Refactoring code is a second nature primarily for Java developers, because Java IDEs embraced refactorings pretty early. But, why limit refactoring only to make code maintainable and understandable? What if there were refactorings that go beyond behavior preservation and make code more secure, more reliable, and run faster? That would require tools that rewrite code with surgical precision, such that the undesirable behavior of the code is fixed, while the good path behavior of the code remains intact. Being integrated with source code and development process, refactorings and program transformations not only help maintain good code, but also teach developers about how to write and appreciate good code.

Speakers
avatar for Munawar Hafiz

Munawar Hafiz

CEO, OpenRefactory
Munawar Hafiz is the founder and CEO of OpenRefactory, Inc., an application security company that intends to improve the way developers write secure, reliable and compliant code. Munawar had a body of work on automated bug fixing in academia which lays the foundation for OpenRefactory... Read More →


Thursday October 7, 2021 18:00 - 19:00 CEST
#4 DevOps

18:00 CEST

How and Why to Upgrade to Java 17
Java upgrades are sometimes seen as difficult and many applications are still running on an older version of Java. This session describes Java's current six months release process and why applications should use a recent Java version. After that, I'll explain the challenges of upgrading and provide some useful tips to make the process easier. Concrete examples (including solutions) will be used to show you how to upgrade your application to Java 16 or 17.

Speakers
avatar for Johan Janssen

Johan Janssen

Software architect, Sanoma Learning
Johan is working as software architect at Sanoma Learning. He has been working for various demanding companies where rapidly delivering high-quality software was very important. Johan regularly writes articles and presents about various subjects, but mainly around Java. He spoke in... Read More →


Thursday October 7, 2021 18:00 - 19:00 CEST
#2 Main EN/DE

18:00 CEST

Responsible Microservices
These days, you can’t swing a dry erase marker without hitting someone talking about microservices. Developers are studying Eric Evan’s prescient book Domain Driven Design. Teams are refactoring monolithic apps, looking for bounded contexts and defining a ubiquitous language. And while there have been countless articles, videos, and talks to help you convert to microservices, few have spent any appreciable time asking if a given application should be a microservice. In this talk, I will show you a set of factors you can apply to help you decide if something deserves to be a microservice or not. We’ll also look at what we need to do to maintain a healthy micro(services)biome. There are many good reasons to use a microservices architecture. But there are no free lunches. The positives of microservices come with added complexity. Teams should happily take on that complexity...provided the application in question benefits from the upside of microservices. This talk will cut through the hype to help you make the right choice for your unique situation.

Speakers
avatar for Nathaniel Schutta

Nathaniel Schutta

Software Architect, Pivotal
Nathaniel T. Schutta is a software architect focused on cloud computing and building usable applications. A proponent of polyglot programming, Nate has written multiple books and appeared in various videos. Nate is a seasoned speaker regularly presenting at conferences worldwide... Read More →


Thursday October 7, 2021 18:00 - 19:00 CEST
#1 Main EN only

19:00 CEST

Kafka as a Platform: the Ecosystem from the Ground Up
Kafka has become a key data infrastructure technology, and we all have at least a vague sense that it is a messaging system, but what else is it? How can an overgrown message bus be getting this much buzz? Well, because Kafka is merely the center of a rich streaming data platform that invites detailed exploration. In this talk, we’ll look at the entire streaming platform provided by Apache Kafka and the Confluent community components. Starting with a lonely key-value pair, we’ll build up topics, partitioning, replication, and low-level Producer and Consumer APIs. We’ll group consumers into elastically scalable, fault-tolerant application clusters, then layer on more sophisticated stream processing APIs like Kafka Streams and ksqlDB. We’ll help teams collaborate around data formats with schema management. We’ll integrate with legacy systems without writing custom code. By the time we’re done, the open-source project we thought was Big Data’s answer to message queues will have become an enterprise-grade streaming platform, all in 60 minutes.

Speakers
avatar for Robin Moffatt

Robin Moffatt

Senior Developer Advocate, Confluent
Robin is a Senior Developer Advocate at Confluent, as well as an Oracle ACE Director (Alumnus). He has been speaking at conferences since 2009 including QCon, Devoxx, Strata, Kafka Summit, and Øredev. His particular interests are analytics and systems architecture. You can find his... Read More →


Thursday October 7, 2021 19:00 - 20:00 CEST
#1 Main EN only
 
Friday, October 8
 

09:00 CEST

Decoupled serverless microservices
In this workshop, we jointly implement some fundamental integration patterns in a serverless microservices scenario on AWS. The focus will be on standard integration patterns based on asynchronous messaging, and how simple they can be implemented with cloud-native messaging services on AWS. We will provide the necessary theory in lectures and then work on hands-on labs under the guidance of the workshop facilitators. Bring your laptop and a charger – we bring AWS accounts.

Speakers
avatar for Christian Müller

Christian Müller

Principal Solutions Architect, Amazon Web Services
In seiner Rolle als Principal Solutions Architect bei AWS hilft Christian seinen Kunden ihre Architekturen in Bezug auf Sicherheit, Zuverlässigkeit, Kosten, Geschwindigkeit und Betrieb zu optimieren, so das sie das volle Potential der AWS Cloud nutzen. Vor seiner Zeit bei AWS hat... Read More →
avatar for Dirk Fröhner

Dirk Fröhner

Solutions Architect, Amazon Web Services
In his role as Solutions Architect at Amazon Web Services, Dirk Fröhner supports enterprise customers to reach their goals better using the cloud, push ahead digitization, and allow more space for innovation. For this, he contributes his wealth of experience in backend development... Read More →


Friday October 8, 2021 09:00 - 13:00 CEST
Workshop 04

09:00 CEST

RapidClipse - Visual Java IDE
In diesem Workshop erhalten Sie einen Überblick über die Funktionsweise von RapidClipse in Verbindung mit MicroStream. Während des Workshops erfahren Sie alles über das AppLayout, FlexLayout und FormLayout um eine Responsive Business-App zu erstellen. Hierbei wird das Layout einer Web-Application so flexibel gestaltet, dass dieses auf dem Computer- Desktop, Tablet und Smartphone eine gleichbleibende Benutzerfreundlichkeit bietet und der Inhalt gänzlich und schnell vom Besucher aufgenommen werden kann. Für das Speichern von Daten wird hinter den Kulissen das MicroStream Framework verwendet. Abschließend wird die fertige Anwendung als PWA-Application auf einem Server zur Verfügung gestellt.

Speakers
avatar for Christian Kuemmel

Christian Kuemmel

Project Manager, Senior Software Consultant, MicroStream Software GmbH
Projektleiter, Senior Software Consultant 12 Jahre im Java Umfeld tätig 8 Jahre Erfahrung im Umgang mit Hibernate Seit ca. 2 Jahren bei MicroStream
avatar for Sebastian Späth

Sebastian Späth

MicroStream Software GmbH
Als Senior Java Developer habe ich bei MicroStream in verschiedenen Projekten gearbeitet. In knapp 10 Jahren habe ich fast alle Stationen durchlaufen und mir dabei jede Menge unterschiedliches Know-how aneignen können. Über das tagtägliche Lösen technischer Support-Fälle, unzähliger... Read More →


Friday October 8, 2021 09:00 - 15:00 CEST
Workshop 02

09:00 CEST

Tests mit Docker #Testcontainers #deepdrive
Docker und Testcontainers haben das Erstellen von Integrationstests revolutioniert. Nie war es so einfach, realitätsnahe Datenbanken mit Testdaten, ausgewachsene Browser oder andere Infrastruktur in seine Tests zu integrieren. Für die meisten Systeme stehen fertige Container bereit, öffentliche und private Registries erleichtern die Verteilung, und auf dem ausführenden Rechner müssen nur Java- und Docker-Installationen vorhanden sein. In diesem Workshop werden wir die Basics von Testcontainers erarbeiten und im Anschluss Integrationstests mit Datenbank- und Browernutzung auf die Verwendung von Testcontainers umstellen. Zum Schluss werden wir noch weitere Optionen der Nutzung erarbeiten. Voraussetzung für die Mitarbeit * Rechner mit Docker-Installation (Win 10 Pro/EDU/EE, mac os, Linux) * Java * Freies Netzwerk

Speakers
avatar for Stefan Hildebrandt

Stefan Hildebrandt

Agile Developer, Freelancer
Stefan Hildebrandt ist als Softwareentwickler und Berater seit zehn Jahren in größeren Projekten tätig. Neben der Entwicklung der Software kümmert er sich auch um Test- und Deployment-Automatisierung. Sein Interesse gilt vermehrt der ganzheitlichen Betrachtung des Softwareentwicklungsprozesses... Read More →


Friday October 8, 2021 09:00 - 16:00 CEST
Workshop 05

09:00 CEST

A Guided Tour of MicroProfile 4.0
In this hands-on session, you will learn the basics around all the MicroProfile implementations and how you can use it in your next application. Topics which will be covered are Config, Health, Metrics, Rest Client, Fault Tolerance, Open Tracing and more. You will be led through a series of demos using these MicroProfile implementations and how each feature addresses one of the challenges in today's development.

Speakers
avatar for Rudy De Busscher

Rudy De Busscher

Developer Advocate, Payara
Rudy loves to create (web) applications with the Jakarta EE platform and MicroProfile implementations and is currently working for Payara as Product Manager and Developer Advocate. He is active in the IT industry for more than 20 years and is a big fan of OpenSource. He is also passionate... Read More →


Friday October 8, 2021 09:00 - 16:00 CEST
Workshop 03

09:00 CEST

Building Supersonic, Subatomic, Cloud Native Applications with Quarkus
This workshop explores why it matters and how you can leverage Quarkus and GraalVM to build supersonic, subatomic, cloud-native applications. In this workshop, you will learn how to: * build Web applications with Quarkus * use Hibernate and Hibernate with Panache * build event-driven microservices with Apache Kafka * monitor your applications All the applications built in this workshop are run on top of the JVM but also compiled as native executables.

Speakers
avatar for Antonio Goncalves

Antonio Goncalves

Developer, AGoncal Consulting
I am a senior developer living in Paris. I evolved in the Java EE landscape for a while and then moved on to Spring, Micronaut and Quarkus. From distributed systems to microservices and the cloud, today I help my customers to develop the architecture that suits them the best. Aside... Read More →


Friday October 8, 2021 09:00 - 16:00 CEST
Workshop 10

10:00 CEST

Running your Java enterprise on Open Liberty on Azure Red Hat OpenShift
In this fast-faced hands-on workshop, you will see first-hand how to run Java EE, Jakarta EE and MicroProfile applications on Open Liberty on Azure Red Hat OpenShift (ARO). The combination of ARO with Open Liberty offers a powerful and flexible platform for your enterprise Java applications. You will gain working experience on how to stand up an ARO cluster quickly and deploy a realistic Java EE, Jakarta EE and MicroProfile application that integrates with some useful services on the cloud such as database, directory server, cache, or log aggregator. At the end of the workshop, you will have materials available that you can explore on your own.

Speakers
avatar for Edward Burns

Edward Burns

Principal Architect, Microsoft
Ed Burns is currently Principal Architect on the Java Tooling and Experiences team at Microsoft. In this role, Ed will help make Azure the best place for Enterprise Java.  Prior to joining Microsoft, Ed was a Consulting Member of the Technical Staff At Oracle.  Ed has worked on... Read More →
avatar for Graham Charters

Graham Charters

WebSphere and Liberty Technical Product Manager, IBM
Graham is an IBM Senior Technical Staff Member and Technical Product Manager at IBM's R&D Laboratory in Hursley, UK. He takes a keen interest in emerging technologies and practices and in particular programming models. His past exploits include establishing and contributing to open... Read More →


Friday October 8, 2021 10:00 - 16:00 CEST
Workshop 06

16:00 CEST

Translating the (event)model to code
How do I design an application? What’s the process like? Where do I even begin?! There are numerous techniques to discover a domain. Event storming is a particularly interesting one. It is a workshop format for quickly exploring business domains, engaging both Domain Experts and Software Developers. Event Modeling adopts Event-storming sticky notes. The final piece was the UI/UX aspects to complete what more resembles a movie storyboard. While Event-storming focuses on discovering the problem space, Event Modeling creates a blueprint for a solution. We will focus on translating the event model blueprint to the source code, by using Axon Framework as a programming model and Axon Server as an event store and message broker. You will learn how to utilize tactical and strategic DDD patterns, and how to effectively apply event-sourcing and CQRS patterns in your design.

Speakers
avatar for Ivan Dugalic

Ivan Dugalic

Solutions Architect, AxonIQ
Solutions Architect with significant experience in designing full-stack application components and providing guidance to the solution teams in development and implementation. Skilled in a wide variety of technology stacks and learning quickly new technologies as needed. Experience... Read More →
avatar for Sara Torrey

Sara Torrey

Software Developer, AxonIQ
Sara Torrey is a software developer at AxonIQ. She is a self-taught backend developer, who has worked with various programming languages and frameworks, namely Java and Spring Boot. She comes from a rather unusual background; she studied Music in university and graduate school. She... Read More →


Friday October 8, 2021 16:00 - 18:00 CEST
Workshop 08

16:00 CEST

Effective Kubernetes for Jakarta EE and MicroProfile Developers
There are several key techniques to understand while using Kubernetes with Java EE, Jakarta EE and MicroProfile applications. Examples include: * How Kubernetes primitives (such as deployments and services) align with application server administration, clustering, auto-discovery, and load-balancing. * How to add self-healing capabilities using Kubernetes probes and monitoring with open source tools like Prometheus/Grafana. * How the CI/CD pipeline of your application can be adapted to Kubernetes. * How Kubernetes can be extended using Operators to effectively manage application server clusters. This workshop walks through each of these considerations in turn. At the end of the workshop, you will have all the materials on GitHub so you can explore on your own.

Have a look at the Session Teaser!​​​

Speakers
avatar for Reza Rahman

Reza Rahman

Principal Program Manager, Microsoft
Reza Rahman is Principal Program Manager for Java on Azure at Microsoft. He works to make sure Java developers are first class citizens at Microsoft and Microsoft is a first class citizen of the Java ecosystem.Reza has been an official Java technologist at Oracle. He is the author... Read More →


Friday October 8, 2021 16:00 - 21:00 CEST
Workshop 07

17:00 CEST

MicroStream Workshop
MicroStream is a fundamentally new persistence framework for storing complex Java object graphs, subgraphs, and single objects. In the other direction, it enables loading complex object graphs, subgraphs as well as single objects dynamically and updating the object graph in RAM. With MicroStream database data models become meaningless for Java developers. No more expensive mappings. No more data-type conversion. No more specific query language. Only one data model: Your Java classes without any dependencies (POJOs). No more complex caching layer. No more inconvenient object copies. Simple and clean architecture. Core-Java features instead of database-specific concepts. The end result is a Java in-memory database app or microservice that is ultra-fast. MicroStream is predestined for any database app that needs high performance and especially for microservices having its own persistence. In this live-coding session, you will learn how MicroStream works and how to get started with MicroStream step by step. After that workshop, you will know everything that is important for developing ultra-fast database apps and microservices with MicroStream. And off course, we have enough time for Q&A. Topics: e.g. new features in MicroStream 4, setup, storage targets, configuration, object model design best practice, storing and loading data, lazy-loading, querying complex object graphs with Java Streams API, changing classes and using legacy type mapping / refactoring, backup strategies, providing apps and services access to the persistent data by using REST and GraphQL, using the MicroStream data viewer. Your trainer are: Markus Kett, CEO and Florian Habermann, CTO

Speakers
avatar for Florian Habermann

Florian Habermann

CTO, MicroStream Software GmbH
Java since 1999. For over 20 years, the main goal of his daily work is making database development with Java much easier and faster than it is today. He still uses every free minute for coding and research.


Friday October 8, 2021 17:00 - 19:00 CEST
Workshop 01

17:00 CEST

Cloud Native Java Made Easy with MicroProfile and Jakarta EE
Come and experience for yourself first-hand how you can build cloud-native solutions quickly and efficiently with open enterprise-grade cloud-native Java programming APIs optimized for microservices and cloud in MicroProfile and Jakarta EE. We will cover a range of topics in a hands-on manner: * Easily develop RESTful and reactive services * Automated true-to-production testing using containers * Application considerations for cloud deployments with containers Join us and let's go cloud native in warp speed with Java together!

Have a look at the Session Teaser!​​​

Speakers
avatar for YK Chang

YK Chang

Developer Advocate & Architect, IBM
Yee-Kang (YK) Chang is the lead developer advocate for IBM's application platform and the developer experience architect for Open Liberty. He contributes to various open source projects like Eclipse Language Servers for MicroProfile & Jakarta EE and Open Liberty and is keen on how... Read More →
avatar for Jamie Coleman

Jamie Coleman

Software Engineer/Advocate, IBM
Jamie is a software developer and Advocate for Open Liberty, MicroProfile and Kabanero based at IBM’s R&D Laboratory in Hursley, UK. He is a subject matter expert in containerised solutions and takes a keen interest in emerging technologies with experience in Maven, git, Jenkins... Read More →
avatar for Mary Grygleski

Mary Grygleski

Developer Advocate, IBM
Mary is a Sr Developer Advocate at IBM with the Liberty/Websphere team, focusing on Liberty, Microprofile, Jakarta EE, Open Source Java, Cloud, Distributed Systems. She transitioned from Unix/C to Java in 2000 and has never looked back since then. She considers herself as a polyglot... Read More →
avatar for Grace Jansen

Grace Jansen

Developer Advocate, IBM
Grace is a Developer Advocate at IBM, working with Open Liberty and Reactive. She's been with IBM since graduating from University with a Biology Degree. Grace enjoys bringing a varied perspective to her projects, using her knowledge of biological systems to simplify complex software... Read More →


Friday October 8, 2021 17:00 - 20:00 CEST
Workshop 09
 
  • Timezone
  • Filter By Date JCON 2021 Oct 5 - 8, 2021
  • Filter By Venue Online - Remote
  • Filter By Type
  • Conference Session DE
  • Conference Session EN
  • Main Conference Session
  • Workshop DE
  • Workshop EN
  • Topic
  • Level
  • Language