| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.karaf.examples.websocket; |
| |
| import org.eclipse.jetty.websocket.api.Session; |
| import org.eclipse.jetty.websocket.api.annotations.OnWebSocketClose; |
| import org.eclipse.jetty.websocket.api.annotations.OnWebSocketConnect; |
| import org.eclipse.jetty.websocket.api.annotations.WebSocket; |
| import org.osgi.service.component.annotations.Activate; |
| import org.osgi.service.component.annotations.Component; |
| import org.osgi.service.component.annotations.Deactivate; |
| import org.osgi.service.component.annotations.Reference; |
| import org.osgi.service.http.HttpService; |
| |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| @Component( |
| name = "example-websocket", |
| immediate = true |
| ) |
| @WebSocket |
| public class WebSocketExample { |
| |
| private static final Set<Session> sessions = Collections.synchronizedSet(new HashSet<>()); |
| |
| private boolean notification = false; |
| |
| @Reference |
| private HttpService httpService; |
| |
| @OnWebSocketConnect |
| public void onOpen(Session session) { |
| session.setIdleTimeout(-1); |
| sessions.add(session); |
| } |
| |
| @OnWebSocketClose |
| public void onClose(Session session, int statusCode, String reason) { |
| sessions.remove(session); |
| } |
| |
| @Activate |
| public void activate() throws Exception { |
| httpService.registerServlet("/example-websocket", new WebsocketExampleServlet(), null, null); |
| |
| notification = true; |
| Thread notification = new Thread(new NotificationThread(sessions)); |
| notification.start(); |
| } |
| |
| @Deactivate |
| public void deactivate() throws Exception { |
| httpService.unregister("/example-websocket"); |
| notification = false; |
| } |
| |
| class NotificationThread implements Runnable { |
| |
| private Set<Session> sessions; |
| |
| public NotificationThread(Set<Session> sessions) { |
| this.sessions = sessions; |
| } |
| |
| @Override |
| public void run() { |
| try { |
| while (notification) { |
| for (Session session : sessions) { |
| session.getRemote().sendString("Hello World"); |
| } |
| Thread.sleep(1000); |
| } |
| } catch (Exception e) { |
| e.printStackTrace(); |
| } |
| } |
| |
| } |
| |
| } |