Summary

With this chapter, you know how to write WebSockets and asynchronous web message systems with a very little code. Java enterprise continues its journey of simplifying the implementation of components and applications. We now know when use Ajax instead of WebSockets and vice versa. Java EE provides many frameworks, often similar, so we must always be skilled at identifying what technology is better for our requests.
We worked on a message system based on HTTP. In the next chapter, we will see the classic message system of Java EE based on JMS. Enjoy!