In this talk, we will focus on one of the most important topics about systems based on the event sourcing pattern: Why it is important to reduce the overall integration complexity.

On the one hand, systems utilizing event sourcing and CQRS provide great improvements and new possibilities, on the other hand, they are also introducing a lot of complexity when it comes to integrating such systems in existing landscapes. We will discuss how to master the given challenges and how-to reduce the integration complexity, specially into landscapes where you have to deal with various architecture styles.

After this talk, all attendees will have an insight on how-to reduce the integration complexity of systems utilizing the event sourcing pattern by using information hiding, Ports & Adapters, introduce the concept of enterprise messages and other useful pattern for example “old-fashioned” database triggers.