GeezerVison

This chapter describes the Java API for WebSocket (JSR 356), which provides support for creating WebSocket applications. WebSocket is an application protocol that provides full-duplex communications between two peers over the TCP protocol.

The following topics are addressed here:

• Introduction to WebSocket

• Creating WebSocket Applications in the Java EE Platform

• Programmatic Endpoints

• Annotated Endpoints

• Sending and Receiving Messages

• Maintaining Client State

• Using Encoders and Decoders

• Path Parameters

• Handling Errors

• Specifying an Endpoint Configurator Class

• The dukeetf2 Example Application

• The websocketbot Example Application

• Further Information about WebSocket