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- import java.io.IOException;
- import java.util.logging.Level;
- import java.util.logging.Logger;
- import javax.inject.Inject;
- import javax.websocket.OnClose;
- import javax.websocket.OnError;
- 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/EchoChamber/echo
- * Where "localhost" is the address of the host,
- * "EchoChamber" is the name of the package
- * 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");
- SessionHandler.addSession(session);
- } 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){
- SessionHandler.sendToallConnectedSessions(message);
- }
- /**
- * 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");
- SessionHandler.removeSession(session);
- }
- @OnError
- public void onError(Throwable error) {
- Logger.getLogger(EchoServer.class.getName()).log(Level.SEVERE, null, error);
- }
- }
- import java.io.IOException;
- import java.util.HashSet;
- import java.util.Set;
- import java.util.logging.Level;
- import java.util.logging.Logger;
- import javax.websocket.Session;
- /*
- * To change this license header, choose License Headers in Project Properties.
- * To change this template file, choose Tools | Templates
- * and open the template in the editor.
- */
- /**
- *
- * @author student_10
- */
- public class SessionHandler {
- private static final Set<Session> sessions = new HashSet<>();
- public static void addSession(Session session){
- sessions.add(session);
- }
- public static void removeSession(Session session){
- sessions.remove(session);
- }
- public static void sendToSession(Session session, String message){
- try {
- session.getBasicRemote().sendText(message.toString());
- } catch (IOException ex) {
- sessions.remove(session);
- Logger.getLogger(SessionHandler.class.getName()).log(Level.SEVERE, null, ex);
- }
- }
- public static void sendToallConnectedSessions(String message){
- for (Session session : sessions) {
- sendToSession(session, message);
- }
- }
- }
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