Sometimes you have to join the Dark Side – temporally. Writing documentation and preparing presentations as software developer is bad enough but using Microsoft Office makes it unbearable. Be real – BLOBs shared over email, file system and/or Slack is a thing of the past. We want our stuff text-based and version controlled but sometimes Markdown does not cut it. But help is near – learn how to get an efficient work-flow using Sublime & Maven to generate beautiful PDFs and reveal.js presentations.

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You think of using Gatling to run performance test? But got confused with Scala, DSL and documentation? This presentation shows how to write Gatling tests in your IDE, execute them on the command line and push them into your CI server of choice. Afterwards we discuss a few of Gatling’s feature such as injection profiles, scenario implementation, test configuration and last but not least debugging your Gatling scripts.

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Applications are becoming more and more dynamic, with every month or even every week new
features being added or split out. Traditional application architectures have proven a nightmare to
build such dynamic systems in a reliable and fast way. Therefore, the architecture of applications is
moving more and more towards a microservice architecture.
Additionally, the high amount of users requiring different parts of the application backend requires a
more flexible approach then traditional virtualized servers. To this end, container based service
hosting has found a strong penetration in the market.
This session will discuss the approach of both methods, their similarities and their coupled and
synchronous rise in the market.

Discuss the future of Jakarta EE with the main people behind it!

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MicroProfile, RxJava, React.js – what else do you need to build lightweight but robust reactive systems efficiently with open source tools? Maybe something for effective data processing and distributed persistence? You can have it with Kafka and Hazelcast. Now let’s have a look at how to assemble all together in almost no time, using Payara Micro. You’ll learn how to use a couple of simple tools to build a highly efficient, scalable and robust system that can be evolved continuously to meet rapidly changing needs and increasing loads.

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Do you want to know how to build modern and scalable applications, while focusing on its business value? You’ll learn how to develop an agile evolutionary architecture which allows delaying unnecessary technical decisions until the time it’s safe to make them. MicroProfile features will get us started quickly. Start simple and easily refactor to improve the important parts later. Open source implementations of MicroProfile like Payara Micro add further flexibility; it can range from simple messaging to Apache Kafka or Amazon SQS for high performance messaging; from simple config files to distributed config. Come to learn how to think flexibly and adapt to the future.

In a live demonstration, you’ll see how an example application can be evolved gradually to deliver business value quickly and how to add new features later. You’ll learn how to evolve the application according to changing requirements without creating a ball of mud in the future.

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The topic includes basic and gentle introduction to Apache Kafka bundled with a live demo. For those that love to experiment and make their hands dirty. There will be a GitHub project including a dockerized infrastructure – Kafka and Zookeeper. All this will be followed by some real world Kafka stories from the kitchen.

Discuss the future of Jakarta EE with the main people behind it!

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Create you very first Helidon-SE and Helidon-MP microservice!

Come learn about developing microservices using Helidon. Helidon is an open source project led by Oracle. Helidon contains a collection of Java libraries for building microservices. In this session we will talk about two programming models supported by Helidon: lightweight, functional model using JDK as runtime for those wanting less “magic” and Microprofile for those wanting inversion of control and familiar Java EE APIs. We will show how to quickly create your first Helidon application which uses both programming models.

Coroutines is a new feature in Kotlin. It allows for writing asynchronous code almost just like if it was regular/synchronous. This makes coroutines a great alternative to existing approaches for writing asynchronous applications.

In this session, I’ll show how coroutines work in Kotlin. You’ll learn about new syntax and implementation details. You’ll find out about the differences between coroutines-based and reactive-based solutions. You’ll also see a sample Spring-based application which uses coroutines.