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.netty.basic; import io.netty.buffer.ByteBuf; import io.netty.buffer.Unpooled; import io.netty.channel.ChannelHandlerAdapter; import io.netty.channel.ChannelHandlerContext; import java.util.logging.Logger; public class TimeClientHandler extends ChannelHandlerAdapter { private static final Logger logger = Logger.getLogger(TimeClientHandler.class.getName()); private final ByteBuf firstMessage; /** * Creates a client-side handler. */ public TimeClientHandler() { byte[] req = "QUERY TIME ORDER".getBytes(); firstMessage = Unpooled.buffer(req.length); firstMessage.writeBytes(req); } @Override public void channelActive(ChannelHandlerContext ctx) { ctx.writeAndFlush(firstMessage); } @Override public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception { ByteBuf buf = (ByteBuf) msg; byte[] req = new byte[buf.readableBytes()]; buf.readBytes(req); String body = new String(req, "UTF-8"); System.out.println("Now is : " + body); } @Override public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) { // ? logger.warning("Unexpected exception from downstream : " + cause.getMessage()); ctx.close(); } }