Summary

In this chapter, we started our journey by learning the importance of defining proper communication between microservices. We mostly use two main communication forms: async and sync. Choosing one over another is always a context-dependent choice – context is king. Then, we talked about the advantages of asynchronous communication. There are multiple ways of implementing asynchronous communication and we talked about most of the popular choices. Everything has a price and integrated microservices architecture is not an exception. It brings a lot of additional complexity we need to take into account and one of them is asynchronous communication.

We talked about Apache Kafka, which helps us to overcome the problem we have. We learned about essential concepts such as clusters, brokers, topics, messages, and partitions. Our practical examples covered two main microservices. The transaction service was our producer, which produces a message, and the account microservice...