Created
March 17, 2015 06:14
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Example of Websocket on tomcat8
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| package me.simpleweb2; | |
| import java.io.IOException; | |
| import javax.websocket.OnClose; | |
| import javax.websocket.OnMessage; | |
| import javax.websocket.OnOpen; | |
| import javax.websocket.Session; | |
| import javax.websocket.server.ServerEndpoint; | |
| /** | |
| * @ServerEndpoint gives the relative name for the end point This will be | |
| * accessed via ws://localhost:8080/<ProjectName>/echo Where | |
| * "localhost:8080" is the address of the host, <ProjectName> is | |
| * the name of the project and "echo" is the address to access | |
| * this class from the server | |
| */ | |
| @ServerEndpoint("/echo") | |
| public class EchoServer { | |
| /** | |
| * @OnOpen allows us to intercept the creation of a new session. The session | |
| * class allows us to send data to the user. In the method onOpen, | |
| * we'll let the user know that the handshake was successful. | |
| */ | |
| @OnOpen | |
| public void onOpen(Session session) { | |
| System.out.println(session.getId() + " has opened a connection"); | |
| try { | |
| session.getBasicRemote().sendText("Connection Established"); | |
| } catch (IOException ex) { | |
| ex.printStackTrace(); | |
| } | |
| } | |
| /** | |
| * When a user sends a message to the server, this method will intercept the | |
| * message and allow us to react to it. For now the message is read as a | |
| * String. | |
| */ | |
| @OnMessage | |
| public void onMessage(String message, Session session) { | |
| System.out.println("Message from " + session.getId() + ": " + message); | |
| try { | |
| session.getBasicRemote().sendText(message); | |
| } catch (IOException ex) { | |
| ex.printStackTrace(); | |
| } | |
| } | |
| /** | |
| * The user closes the connection. | |
| * | |
| * Note: you can't send messages to the client from this method | |
| */ | |
| @OnClose | |
| public void onClose(Session session) { | |
| System.out.println("Session " + session.getId() + " has ended"); | |
| } | |
| } |
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