Bernd Rücker & Martin Schimak- Break your event chains! Complex event flows in distributed systems
6 years ago522 views
Event-driven architectures enable nicely decoupled microservices and are fundamental for decentral data management. However, using peer-to-peer event chains to implement complex end-to-end logic crossing service boundaries can accidentally increase coupling. Extracting such business logic into dedicated services reduces coupling and allows to keep sight of larger-scale flows - without violating bounded contexts, harming service autonomy or introducing god services. Service boundaries get clearer and service APIs get smarter by focusing on their potentially long running nature. We will demonstrate how the new generation of lightweight and highly-scalable state machines ease the implementation of long running services. Based on our real-life experiences, we will share how to handle complex logic and flows which require proper reactions on failures, timeouts and compensating actions and we provide guidance backed by code examples to illustrate alternative approaches.
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