Getting Started with HTML5 WebSocket on Oracle WebLogic 12c
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The WebLogic server implementation has the following components:
- The WebSocket protocol implementation that handles connection upgrades and establishes and manages connections as well as exchanges with the client. The WebLogic server fully implements the WebSocket protocol using its existing threading and networking infrastructure.
- The WebLogic WebSocket Java API, through the weblogic.websocket package, allows you to create WebSocket-based server side applications handling client connections, WebSocket messages, providing context information for a particular WebSocket connection and managing the request/response handshake. For additional information about the WebLogic WebSocket Java API interfaces and classes, visit the following resource: http://docs.oracle.com/middleware/1212/wls/WLPRG/websockets.htm#BABJEFFD
- To declare a WebSocket endpoint you use the @WebSocket annotation that allow you to mark a class as a WebSocket listener that's ready to be exposed and handle events. The annotated class must implement the WebSocketListener interface or extend from the WebSocketAdapter class.
Here is a simple application that creates a WebSocket endpoint at the /echo/ location path, receives messages from the client and sends the same message back to the client.
There are many samples out there that you can use to test the implementation above. One quick way of doing that is to navigate to http://www.websocket.org/echo.html and then point the location field to your WebLogic server. If you follow the sample available on https://github.com/mjabali/HelloWorld_WebSocket then you'll end up with something like ws://localhost:7001/HelloWorld_WebSocket/echo/ for the WebSocket server application.
The sample client provided will be available at http://localhost:7001/HelloWorld_WebSocket/index.html after the WebLogic deployment. See the README.md file on GitHub for additional instructions.
Published at DZone with permission of Marcelo Jabali, DZone MVB. See the original article here.
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