com.gdut.Netty_testing.time_server.client.TimeClient.java Source code

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Here is the source code for com.gdut.Netty_testing.time_server.client.TimeClient.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.gdut.Netty_testing.time_server.client;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.ChannelPipeline;
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.logging.LogLevel;
import io.netty.handler.logging.LoggingHandler;
import io.netty.handler.ssl.SslContext;
import io.netty.handler.ssl.SslContextBuilder;
import io.netty.handler.ssl.util.InsecureTrustManagerFactory;
import io.netty.util.AttributeKey;

/**
 * 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 TimeClient {

    static final boolean SSL = System.getProperty("ssl") != null;
    static final String HOST = System.getProperty("host", "localhost");
    static final int PORT = Integer.parseInt(System.getProperty("port", "80"));
    static final int SIZE = Integer.parseInt(System.getProperty("size", "4"));

    /**
     * 
     * @Title: main
     * @Description: TODO
     * @param @param args
     * @param @throws Exception
     * @return void
     * @throws
     */
    public static void main(String[] args) throws Exception {
        // Configure SSL.git
        final SslContext sslCtx;
        if (SSL) {
            sslCtx = SslContextBuilder.forClient().trustManager(InsecureTrustManagerFactory.INSTANCE).build();
        } else {
            sslCtx = null;
        }

        // Configure the client.
        EventLoopGroup group = new NioEventLoopGroup();
        try {
            Bootstrap b = new Bootstrap();
            b.group(group).channel(NioSocketChannel.class).option(ChannelOption.TCP_NODELAY, true)
                    .handler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        public void initChannel(SocketChannel ch) throws Exception {
                            ch.pipeline().addLast(new TimeDecoder(), new TimeClientHandler(),
                                    new TimeOutBoundHandler(), new LoggingHandler(LogLevel.INFO));
                        }
                    });

            // Start the client.
            ChannelFuture f = b.connect(HOST, PORT).sync();
            // channel.connect(remoteAddress, promise);
            // ?connect()??OutboundHandler
            // ?InboundHandlerlogic???
            // ??
            // InboundHandler?writeAndFlush(Object
            // msg)??OutBoundHandler
            // ??  ctx.write(encoded, promise);
            // writeAndFlush(Object msg)
            // ?InboundHandler  decoder?
            // ?TimeClientHandler()Handler,
            // ctx.close();?OutBoundHandler ?

            Thread.sleep(9000);
            // Wait until the connection is closed.
            f.channel().closeFuture().sync();
        } finally {
            // Shut down the event loop to terminate all threads.
            group.shutdownGracefully();
        }
    }
}