Java tutorial
/* * Copyright 2012 The Netty Project * * The Netty Project 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 com.alltobid.quotabid; import java.util.concurrent.ConcurrentLinkedQueue; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import io.netty.bootstrap.Bootstrap; import io.netty.channel.Channel; import io.netty.channel.EventLoopGroup; import io.netty.channel.nio.NioEventLoopGroup; import io.netty.channel.socket.nio.NioSocketChannel; import io.netty.handler.traffic.GlobalTrafficShapingHandler; import io.netty.util.concurrent.GlobalEventExecutor; /** * Sends one message when a connection is open and echoes back any received data * to the server. Simply put, the echo client initiates the ping-pong traffic * between the echo client and server by sending the first message to the * server. */ public final class BidClient { private static final String HOST = System.getProperty("host", "localhost"); private static final int PORT = Integer.parseInt(System.getProperty("port", "8080")); private static final Logger logger = LoggerFactory.getLogger(BidClient.class); public static final GlobalTrafficShapingHandler globalTrafficShapingHandler = new GlobalTrafficShapingHandler( GlobalEventExecutor.INSTANCE); public static final ConcurrentLinkedQueue<ReceivedMessage> receivedMessageQueue = new ConcurrentLinkedQueue<ReceivedMessage>(); public static final BidClientHandler bidClientHandler = new BidClientHandler(); public static void main(String[] args) throws Exception { bidClientHandler.addListener(new BidClientHandlerAdapter() { @Override public void messageReceived(ReceivedMessage receivedMessage) { receivedMessageQueue.add(receivedMessage); } }); // Configure the client. EventLoopGroup group = new NioEventLoopGroup(); try { Bootstrap b = new Bootstrap(); b.group(group).channel(NioSocketChannel.class).handler(new BidClientInitializer()); MonitorThread monitorThread = new MonitorThread(); monitorThread.setName("BidClient Monitor"); monitorThread.start(); while (true) { try { // Start the client. Channel ch = b.connect(HOST, PORT).sync().channel(); // Wait until the connection is closed. ch.closeFuture().sync(); } catch (Exception ex) { logger.error("Channel Error", ex); Thread.sleep(5000); } } } finally { // Shut down the event loop to terminate all threads. group.shutdownGracefully(); } } }