Building Event-Driven Microservices

Chapter 17. Conclusion

Event-driven microservice architectures provide a powerful, flexible, and well-defined approach to solving business problems. Here is a quick recap of the things that have been covered in this book, as well as some final words.

Communication Layers

The data communication structure allows for universal access of important business events across the organization. Event brokers fulfill this need extremely well, as they permit the strict organization of data, can propagate updates in near–real time, and can operate at big-data scale. The communication of data remains strictly decoupled from the business logic that transforms and utilizes it, offloading these requirements into individual bounded contexts. This separation of concerns allows the event broker to remain largely agnostic of the business logic requirements (aside from supporting reads and writes), enabling it focus strictly on storing, preserving, and distributing the event data to consumers.

A mature data communication layer decouples the ownership and production of data from the access and consumption of it. Applications no longer need to perform double duty by serving internal business logic while also providing synchronization mechanisms and outside direct access for other services.

Any service can leverage the durability and resiliency of the event broker to makes its data highly available, including those that use the event broker to store changelogs of its internal state. A failed service instance ...