Event sourcing, event-driven architectures and CQRS

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 we’ll show the concept and benefits of CQRS, to which other buzzwords such as eventual consistency, event-driven architectures and event sourcing are 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 examining the “devil is in the details” cases of both approaches.

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Sebastian Daschner, Freelancer

DaschnerS

Sebastian Daschner is a self-employed Java consultant, author, and trainer and is enthusiastic about programming and Java (EE). He is the author of the book "Architecting Modern Java EE Applications". Sebastian is participating in the JCP, helping to form the future standards of Java EE, serving in the JAX-RS, JSON-P and Config Expert Groups and collaborating on various open source projects. For his contributions in the Java community and ecosystem, he was recognized as a Java Champion, Oracle Developer Champion and JavaOne Rockstar. Besides Java, Sebastian is also a heavy user of Linux and container technologies like Docker. He evangelizes computer science practices on https://blog.sebastian-daschner.com, his newsletter, and on Twitter via @DaschnerS. When not working with Java, he also loves to travel the world — either by plane or motorbike.

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