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// Java dans tous ses états

September 20th, Java Champions Night!

Geneva Business Center - Auditorium, starting at 18h30

Moving to GC1 by Kirk Pepperdine (english talk)

Come Java 9, our beloved mostly CMS collector will be depreciated and the G1GC will replace the Parallel collector as the default. The hype surrounding this massive change that the G1GC is the best collector… ever. Make no mistake about it, G1GC will be much much easier to tune. So, is this real or is it #fakenews. In this session we will explore the reality by looking experiences moving applications from CMS to G1GC in real production environments. The implications aren’t simply about performance. A sub-optimally tuned collector will increase your companies operating cost by 10-20%. We will also explore results from benchmarks that expose potential pain points. and offer some suggestions on what actions can offer some relief.

When, why and how to CQRS by Sebastian Daschner (english talk)

Most of today’s enterprise applications base on a CRUD data model that is simple and straightforward to implement. Another concept of how to model applications is Command Query Responsibility Segregation (CQRS) that enables interesting solutions and use cases, especially with rising demands of scalability. In this session I’ll show the concept and benefits of CQRS, to which other buzzwords such as eventual consistency, event-driven architectures and event sourcing it is related and how to realize a CQRS application. The questions whether this concept can be realized with Java EE technology, where the framework already offers solutions and where it has to be extended will be answered. Most of the time will be spent live-coding and examining the ‘devil is in the details’ cases of both approaches.

Making the Most of Your Gradle Build by Andres Almiray (english talk)

Maven has been the dominant build tool in the Java space for quite some time now. While it’s a proven technology it’s certainly aged, there are new and better alternatives out there. Gradle is perhaps the one that’s better positioned to succeed Maven as the build tool of choice. Since 2012 Gradle adoption has skyrocketed. Not only do popular and big open source projects, such as Spring and its portfolio, Hibernarte and Groovy, have migrated to Gradle but large enterprises too. Not to forget that Gradle is the defacto build tool for Android applications since 2013.

As usual, we will end up this meeting with a buffet provided by our lovely sponsors !

Eventbrite - Java Champions Night !

Le Geneva Java User Group en quelques mots ...

Le GenevaJUG est un groupe d’utilisateurs Java ayant pour but de réunir les acteurs du langage (professionnels, communautés open source, institutions, étudiants, enseignants…) afin d’échanger des idées et de discuter des avancées technologiques de la plateforme Java.

Nous nous rencontrons le dernier mardi du mois. Les réunions sont gratuites, ouvertes à tous et consistent en une présentation technique, une démonstration d’un produit, ou une table ronde. Après la réunion nous nous retrouvons généralement pour un échange informel autour d’un verre et d’un mini-buffet.