2 * Copyright (c) 2013 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.controller.sal.restconf.impl.websockets.client;
10 import io.netty.bootstrap.Bootstrap;
11 import io.netty.buffer.Unpooled;
12 import io.netty.channel.Channel;
13 import io.netty.channel.ChannelInitializer;
14 import io.netty.channel.ChannelPipeline;
15 import io.netty.channel.EventLoopGroup;
16 import io.netty.channel.nio.NioEventLoopGroup;
17 import io.netty.channel.socket.SocketChannel;
18 import io.netty.channel.socket.nio.NioSocketChannel;
19 import io.netty.handler.codec.http.HttpClientCodec;
20 import io.netty.handler.codec.http.HttpObjectAggregator;
21 import io.netty.handler.codec.http.websocketx.CloseWebSocketFrame;
22 import io.netty.handler.codec.http.websocketx.PingWebSocketFrame;
23 import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;
24 import io.netty.handler.codec.http.websocketx.WebSocketClientHandshakerFactory;
25 import io.netty.handler.codec.http.websocketx.WebSocketVersion;
26 import java.io.BufferedReader;
27 import java.io.InputStreamReader;
29 import org.slf4j.Logger;
30 import org.slf4j.LoggerFactory;
32 public class WebSocketClient {
34 private final URI uri;
35 private Bootstrap bootstrap = new Bootstrap();;
36 private final WebSocketClientHandler clientHandler;
37 private static final Logger logger = LoggerFactory.getLogger(WebSocketClient.class);
38 private Channel clientChannel;
39 private final EventLoopGroup group = new NioEventLoopGroup();
41 public WebSocketClient(URI uri, IClientMessageCallback clientMessageCallback) {
43 clientHandler = new WebSocketClientHandler(WebSocketClientHandshakerFactory.newHandshaker(uri,
44 WebSocketVersion.V13, null, false, null), clientMessageCallback); // last
54 private void initialize() {
56 String protocol = uri.getScheme();
57 if (!"ws".equals(protocol)) {
58 throw new IllegalArgumentException("Unsupported protocol: " + protocol);
61 bootstrap.group(group).channel(NioSocketChannel.class).handler(new ChannelInitializer<SocketChannel>() {
63 public void initChannel(SocketChannel ch) throws Exception {
64 ChannelPipeline pipeline = ch.pipeline();
65 pipeline.addLast("http-codec", new HttpClientCodec());
66 pipeline.addLast("aggregator", new HttpObjectAggregator(8192));
67 pipeline.addLast("ws-handler", clientHandler);
72 public void connect() throws InterruptedException {
73 System.out.println("WebSocket Client connecting");
74 clientChannel = bootstrap.connect(uri.getHost(), uri.getPort()).sync().channel();
75 clientHandler.handshakeFuture().sync();
78 public void writeAndFlush(String message) {
79 clientChannel.writeAndFlush(new TextWebSocketFrame(message));
82 public void writeAndFlush(Object message) {
83 clientChannel.writeAndFlush(message);
87 clientChannel.writeAndFlush(new PingWebSocketFrame(Unpooled.copiedBuffer(new byte[] { 1, 2, 3, 4, 5, 6 })));
90 public void close(String reasonText) throws InterruptedException {
91 CloseWebSocketFrame closeWebSocketFrame = new CloseWebSocketFrame(1000, reasonText);
92 clientChannel.writeAndFlush(closeWebSocketFrame);
94 // WebSocketClientHandler will close the connection when the server
95 // responds to the CloseWebSocketFrame.
96 clientChannel.closeFuture().sync();
97 group.shutdownGracefully();
100 public static void main(String[] args) throws Exception {
102 if (args.length > 0) {
103 uri = new URI(args[0]);
105 uri = new URI("http://192.168.1.101:8181/opendaylight-inventory:nodes");
107 IClientMessageCallback messageCallback = new ClientMessageCallback();
108 WebSocketClient webSocketClient = new WebSocketClient(uri, messageCallback);
109 webSocketClient.connect();
112 BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
113 String input = br.readLine();
114 if (input.equals("q")) {
115 System.out.print("Would you like to close stream? (Y = yes, empty = yes)\n");
116 input = br.readLine();
117 if (input.equals("yes") || input.isEmpty()) {
118 webSocketClient.close("opendaylight-inventory:nodes");
125 private static class ClientMessageCallback implements IClientMessageCallback {
127 public void onMessageReceived(Object message) {
128 if (message instanceof TextWebSocketFrame) {
129 logger.info("received message {}" + ((TextWebSocketFrame) message).text());