org.tiger.netty.rpc.all.client.NettyClient.java Source code

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Here is the source code for org.tiger.netty.rpc.all.client.NettyClient.java

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/*
 * Copyright 2013-2018 Lilinfeng.
 *  
 * Licensed 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 org.tiger.netty.rpc.all.client;

import org.tiger.netty.rpc.all.NettyConstant;
import org.tiger.netty.rpc.all.codec.NettyMessageDecoder;
import org.tiger.netty.rpc.all.codec.NettyMessageEncoder;

import java.net.InetSocketAddress;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.timeout.ReadTimeoutHandler;

/**
 * @author Lilinfeng
 * @version 1.0
 * @date 2014315
 */
public class NettyClient {

    private ScheduledExecutorService executor = Executors.newScheduledThreadPool(1);
    //?NIO?CPU2?
    EventLoopGroup group = new NioEventLoopGroup();

    public void connect(int port, String host) throws Exception {
        try {
            //Netty?
            Bootstrap b = new Bootstrap();
            b.group(group)
                    //Channel
                    .channel(NioSocketChannel.class)
                    //TCP?NIO?BIO?????
                    //SO_TIMEOUT:??0??
                    //SO_SNDBUF:???
                    //SO_RCVBUF:?
                    //SO_REUSEADDR:??ServerSocket???ServerSocketServerSocket??
                    //SO_REUSEADDR????????????
                    //CONNECT_TIMEOUT_MILLIS:NIO????Netty
                    //TCP_NODELAY:?TCP_NODELAY?Nagle?Nagle
                    .option(ChannelOption.TCP_NODELAY, true).handler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        public void initChannel(SocketChannel ch) throws Exception {
                            //new LengthFieldBasedFrameDecoder(100000000,0,4,0,4)
                            //??
                            //??????030
                            //??44
                            //???
                            //????4????
                            ch.pipeline().addLast(new NettyMessageDecoder(1024 * 1024, 4, 4));
                            ch.pipeline().addLast("MessageEncoder", new NettyMessageEncoder());//Handler
                            ch.pipeline().addLast("readTimeoutHandler", new ReadTimeoutHandler(50));
                            ch.pipeline().addLast("LoginAuthHandler", new LoginAuthReqHandler());
                            ch.pipeline().addLast("HeartBeatHandler", new HeartBeatReqHandler());
                        }
                    });
            //?????NioSocketChannel?
            //?????????????
            ChannelFuture future = b.connect(new InetSocketAddress(host, port),
                    new InetSocketAddress(NettyConstant.LOCALIP, NettyConstant.LOCAL_PORT)).sync();
            future.channel().closeFuture().sync();
        } finally {
            // ????????
            executor.execute(new Runnable() {
                public void run() {
                    try {
                        TimeUnit.SECONDS.sleep(1);
                        try {
                            connect(NettyConstant.PORT, NettyConstant.REMOTEIP);// ???
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            });
        }
    }

    /**
     * @param args
     * @throws Exception
     */
    public static void main(String[] args) throws Exception {
        new NettyClient().connect(NettyConstant.PORT, NettyConstant.REMOTEIP);
    }

}