Summary

In this chapter, we have seen how we can develop reactive microservices!

Using Spring WebFlux and Spring WebClient, we can develop non-blocking synchronous APIs that can handle incoming HTTP requests and send outgoing HTTP requests without blocking any threads. Using Spring Data’s reactive support for MongoDB, we can also access MongoDB databases in a non-blocking way, that is, without blocking any threads while waiting for responses from the database. Spring WebFlux, Spring WebClient, and Spring Data rely on Project Reactor to provide their reactive and non-blocking features. When we must use blocking code, for example, when using Spring Data for JPA, we can encapsulate the processing of the blocking code by scheduling the processing of it in a dedicated thread pool.

We have also seen how Spring Data Stream can be used to develop event-driven asynchronous services that work on both RabbitMQ and Kafka as messaging systems without requiring any changes in the...