In this chapter, we managed to introduce the new low-level type of communication. We presented how it works underneath and compares to SOAP and REST introduced in the previous chapter. We also discussed how the new approach changes the development of web applications.

Our ticket booking application was further enhanced to show users the changing state of the seats using push-like notifications. The new additions required very little code changes in our existing project when we take into account how much we are able to achieve with them. The fluent integration of WebSockets from Java EE 7 with the AngularJS application is another great showcase of flexibility, which comes with the new version of the Java EE platform.

In the next chapter, you will learn more about WildFly administration and management, so that we can explore more system-wide features of Java EE 7 in the following chapters.