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.qq.servlet.demo.netty.sample.objectecho; import io.netty.channel.ChannelHandlerAdapter; import io.netty.channel.ChannelHandlerContext; import java.util.ArrayList; import java.util.List; import java.util.logging.Level; import java.util.logging.Logger; /** * Handler implementation for the object echo client. It initiates the * ping-pong traffic between the object echo client and server by sending the * first message to the server. */ public class ObjectEchoClientHandler extends ChannelHandlerAdapter { private static final Logger logger = Logger.getLogger(ObjectEchoClientHandler.class.getName()); @Override public void channelActive(ChannelHandlerContext ctx) throws Exception { // Send the first message if this handler is a client-side handler. ctx.writeAndFlush(new MyBean()); } @Override public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception { // Echo back the received object to the server. // ctx.write(msg); System.out.println(Thread.currentThread().getName() + "\t" + msg); } @Override public void channelReadComplete(ChannelHandlerContext ctx) throws Exception { ctx.flush(); ctx.close(); } @Override public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception { logger.log(Level.WARNING, "Unexpected exception from downstream.", cause); ctx.close(); } }