Introduction to the Java API for Web Sockets
by Kevin Jones
The web is becoming more and more about building applications rather than building web pages, and that typically means two-way communication between the web client code and the server. In this course, you will build a Java server that supports the Java API for Web Sockets, and a JavaScript client that uses web sockets to provide two-way communication between the client and the server.
What you'll learn
More and more web applications are using web sockets. In this course, you will learn how to use the Java API for Web Sockets to provide communication between the client and a Java based server. The course will cover sending simple text messages as well as how to send, receive, and process binary messages. We also show how to deserialize such messages into Java types and how to use those Java types to process the message. You'll also learn how to serialize Java objects into messages that can be sent to and processed by a client. Finally, we look at ways to extend the server using 'path=parameter,' which allows clients to use the same web socket but to partition the application using URLs.
About the author
A long time ago in a university far, far away Kevin fell in love with programming. Initially on the university's DEC20 computer doing BASIC and Pascal and a little bit of Fortran. His first job had him writing batch PL/1 on an IBM mainframe where he also discovered the arcane delights of JCL. He soon realized the multiuser systems were not for him after discovering the delights of dBase IV on IBM PCs. From here it was all downhill as he became addicted to C and the Windows API. Just missing out ... moreon coding for Windows 1, he did code for the other 16 bit versions of Windows, 2 and 3, including the various network-ready versions. He still remembers the awkwardness of having to carry an IBM Token Ring MAU with him wherever he went.
After trying to pretend that Windows and C were really object oriented he decided that it would be better to learn C++. It was around this point that he realized that as well as writing code for a living he could be paid for telling people how to write code for a living. He taught Windows, MFC and C++ for a UK training company before his spirit was broken on the back of the OLE support in MFC when he finally stepped away from the nightmare of unmanaged code to the nirvana of the managed runtime called Java.
It was at this time that he spoke at several JavaOne conferences usually on the subject of Servlets, JavaServer Pages and tag libraries. After buying the Sun employees copious amounts of Apple Martini Kevin was invited onto the expert groups for the Servlet and JSP specifications.
Oh, how he laughed when .Net appeared and the same arguments raged about non-deterministic destruction and garbage collection that were now so old hat in the Java world. He finally got his hands dirty in C# and .Net about eight years ago, again working in the web tier and hating every minute of the using the monstrosity that was and is ASP.Net Web Forms. It wasn't until MVC appeared that he finally felt he had come home to Microsoft.
Now of course MVC is so last year and Kevin is focusing more and more on rich clients using JavaScript and tools such as Knockout and AngularJS. He believes that JavaScript is the best thing since, well, JavaScript.
He still retains his passion for developing and teaching; spending about a quarter of the year doing the latter and most of the time doing the former.
When not stuck in front of a computer you can find him: with his nose in a book, a good one preferably, but almost any book would do; watching a film; walking; running; or annoying his wife by watching sports on television.