com.xxx.util.io.client.netty.EchoClientHandler.java Source code

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Here is the source code for com.xxx.util.io.client.netty.EchoClientHandler.java

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/*
 * 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.xxx.util.io.client.netty;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufUtil;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.util.CharsetUtil;

import java.io.IOException;
import java.util.Timer;
import java.util.TimerTask;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Handler implementation for the echo client.  It initiates the ping-pong
 * traffic between the echo client and server by sending the first message to
 * the server.
 */
public class EchoClientHandler extends ChannelInboundHandlerAdapter {
    private final static Logger logger = LoggerFactory.getLogger(EchoClientHandler.class);
    private final ByteBuf firstMessage;
    private int headSize;
    private boolean isLongConnect;

    /**
     * Creates a client-side handler.
     */
    public EchoClientHandler() {
        firstMessage = Unpooled.buffer(EchoClient.SIZE);
        //        for (int i = 0; i < firstMessage.capacity(); i ++) {
        //            firstMessage.writeByte((byte) i);
        //        }
        firstMessage.writeBytes("00000003123".getBytes());
    }

    public EchoClientHandler(int headSize, boolean isLongConnect) {
        firstMessage = Unpooled.buffer(EchoClient.SIZE);
        firstMessage.writeBytes("00000003123".getBytes());
        this.headSize = headSize;
        this.isLongConnect = isLongConnect;
    }

    @Override
    public void channelActive(ChannelHandlerContext ctx) {
        //ctx.writeAndFlush(firstMessage);
        if (isLongConnect) {
            startHeartBeatThread(ctx);
        }
    }

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) {

        ByteBuf in = (ByteBuf) msg;
        System.out.println(in.toString(CharsetUtil.US_ASCII));

        //       ByteBuf in2 = ByteBufUtil.threadLocalDirectBuffer();
        //       System.out.println(in2.toString(CharsetUtil.US_ASCII));
        //ctx.write(msg);
    }

    @Override
    public void channelReadComplete(ChannelHandlerContext ctx) {
        ctx.flush();
        if (!isLongConnect) {
            ctx.close();
        }
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
        // Close the connection when an exception is raised.
        cause.printStackTrace();
        ctx.close();
    }

    /**
     * ?
     */
    public void startHeartBeatThread(final ChannelHandlerContext ctx) {
        final Timer heartBeatTimer = new Timer();
        TimerTask heartBeatTask = new TimerTask() {
            @Override
            public void run() {
                if (!ctx.channel().isWritable()) {
                    heartBeatTimer.cancel();
                    logger.info("Socket???");
                    return;
                }
                logger.info("Socket??");
                if (headSize == EchoClient.HEAD_SIZE_8) {
                    ByteBuf firstMessage = Unpooled.buffer(EchoClient.SIZE);
                    firstMessage.writeBytes("00000000".getBytes());
                    ctx.writeAndFlush(firstMessage);
                } else if (headSize == EchoClient.HEAD_SIZE_6) {
                    ByteBuf firstMessage = Unpooled.buffer(EchoClient.SIZE);
                    firstMessage.writeBytes("000000".getBytes());
                    ctx.writeAndFlush(firstMessage);
                }
            }
        };
        heartBeatTimer.schedule(heartBeatTask, 5000, 5000);
    }
}