Hands-On Reactive Programming in Spring 5

Reactive WebSocket API

We have now covered most of the new features of the new WebFlux module. However, one of the crucial parts of the modern web is a streaming interaction model, where both the client and server can stream messages to each other. In this section, we will look at one of the most well-known duplex protocols for duplex client-server communication, called WebSocket.

Despite the fact that communication over the WebSocket protocol was introduced in the Spring Framework in early 2013 and designed for asynchronous message sending, the actual implementation still has some blocking operations. For instance, both writing data to I/O or reading data from I/O are still blocking operations and therefore both impact on the application's ...