J-Spring 201921 Videos

J-Spring 2019 Aftermovie

J-Spring 2019 was the Java conference of the spring by the NLJUG. More than 600 Java specialists came together to learn, share ideas and listen to world-level speakers such as Burr Sutter, Adam Bien and 16 other national and international heroes. Take a look at this recap to feel what J-Spring was like. A big […]

J-Spring 2019 Keynote: Wouter Oet – Keynote: A life of working and learning in IT: Challenge accepted!

In an ever changing world, developers sometimes struggle to keep up with all the changes happening. There are just too many releases of languages, frameworks and libraries to keep up with. Not to mention the broadening of our profession. Pipelines, runtimes, security and Ops are also part of it. We are going to face that […]

J-Spring 2019: Adam Bien – Kickass Apps with Boring Tech: Interactive Hacking #Slideless

What happens, when you focus on the domain and ignore the technology? In this session I will hack a full stack application from microservice backend to WebStandards frontend without any esoteric frameworks, technologies or libraries. Questions are highly welcome and are going to be answered in real time. Bio Adam Adam Bien: Java (EE), Jakarta […]

J-Spring 2019: Allard Buijze – Pragmatic Microservices with DDD, CQRS and Event Sourcing Using Axon Framework

Events are becoming increasingly important in modern architectures. Although CQRS and Event Sourcing are increasingly being adopted, the complexity of implementing it is often highly over-estimated. In this session, we will first briefly cover what CQRS and Event Sourcing are, and how it addresses some common requirements that modern applications have. Next, we will open […]

J-Spring 2019: Bert Ertman – Are We Really Cloud-Native?

As Java developers we are used to adjusting ourselves in heterogeneous environments and so over the last ten years or so we gained experience with PaaS, VMs, Containers, DevOps, Continuous Integration and Microservices Architectures. Now a new phenomenon arises: building greenfield applications with the intent of using agile application development and architecting specifically for the […]

J-Spring 2019: Bert jan Schrijver – NLJUG Update

What is the status of the NLJUG and where are we going? Bio Bert Jan Bert Jan is CTO at OpenValue and focuses on Java, Continuous Delivery and DevOps. Bert Jan is a Java Champion, JavaOne Rock Star speaker, Duke’s Choice Award winner and leads NLJUG, the Dutch Java User Group. He loves to share […]

J-Spring 2019: Bert Jan Schrijver – Opening

The Official J-Spring 2019 Opening Bio Bert Jan Bert Jan is CTO at OpenValue and focuses on Java, Continuous Delivery and DevOps. Bert Jan is a Java Champion, JavaOne Rock Star speaker, Duke’s Choice Award winner and leads NLJUG, the Dutch Java User Group. He loves to share his experience by speaking at conferences, writing […]

J-Spring 2019: Berwout de Vries Robles – Impromptu Orchestra with HTTP2 and Reactive Streams

With the introduction of HTTP/2 in 2015, Server Sent Events have received a new life as Reactive Streams. In this talk we will look into how these technologies work. We will look at how and why HTTP/2 came to be. I will show you what you need to do to make practical use of HTTP/2. […]

J-Spring 2019: Brian Vermeer – Live exploiting your open source dependencies

Today, almost all software heavily relies on the use of third-party dependencies. While open source modules are undoubtedly awesome, they also represent an undeniable and massive risk. You’re introducing someone else’s code into your system, often with little or no scrutiny. Including the wrong package can introduce severe vulnerabilities, exposing your application and your user’s […]

J-Spring 2019: Brian Vermeer & Paulien van Alst – My Kotlin is better than your Java

TLDR: The big discussion: Kotlin or Java, to migrate or not to migrate and why… The world of languages on the JVM has seen alternatives to Java come and go. Kotlin is probably the most popular one at this moment. Although Java is still one of the most commonly used programming languages, Kotlin seems to […]