Inter-service communication is possible with synchronous or asynchronous communication, which are styles of collaborations. Microservices should have asynchronous APIs. The API gateway is a proxy server that provides a way to interact various clients with APIs. API management, as an API gateway, provides plenty of features to manage/host various RESTful APIs. There are various patterns that help us communicate with microservices. With the use of Azure Bus Service, we can easily manage and play with inter-service communication using the Azure Bus Service message queue; services can easily send or receive messages from each other through this. Eventual consistency talks about scalable systems with high scalability, and it is proven with the CAP theorem.
In the next chapter, we will discuss various testing strategies to test an application and build on the microservice architectural style.
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