15 Other Patterns in Java EE
WHAT’S IN THIS CHAPTER?
- WebSockets
- Message-oriented middleware
- Microservices versus monoliths
WROX.COM CODE DOWNLOADS FOR THIS CHAPTER
The wrox.com code download for this chapter is found at www.wrox.com/go/
projavaeedesignpatterns on the Download Code tab. The code is in the Chapter 15 download and individually named according to the names throughout the chapter.
This chapter discusses some of the things that are benefits of Java EE and development. You might think of this chapter as containing all the topics that are important to know but don’t fit in any of the other chapters.
This chapter introduces web sockets, which is an exciting new feature of Java EE. Then it introduces message-orientated middleware before moving on to the related topic of microservice architecture.
Enjoy this eclectic bag of tech goodies!
WHAT ARE WEBSOCKETS?
WebSockets might be the most interesting improvement on the web since the introduction of Asynchronous JavaScript And XML (AJAX). It has been popular since the emergence of HTML5 and is supported by many web frameworks. However, it took quite a long time to have a stable and compatible specification for WebSockets.
The Hypertext Transfer Protocol (HTTP) model was designed long before the Internet was popular, and it relied on simple specification and design. In the traditional HTTP model, a client opens a connection to the back-end server, sends an HTTP request of type1 GET, POST, PUT, or DELETE ...
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