com.jjzhk.Chapter12.udp.ChineseProverbClient.java Source code

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Here is the source code for com.jjzhk.Chapter12.udp.ChineseProverbClient.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 com.jjzhk.Chapter12.udp;

import io.netty.bootstrap.Bootstrap;
import io.netty.buffer.Unpooled;
import io.netty.channel.Channel;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.DatagramPacket;
import io.netty.channel.socket.nio.NioDatagramChannel;
import io.netty.util.CharsetUtil;

import java.net.InetSocketAddress;

/**
 * @author lilinfeng
 * @date 20142?14?
 * @version 1.0
 */
public class ChineseProverbClient {

    public void run(int port) throws Exception {
        EventLoopGroup group = new NioEventLoopGroup();
        try {
            Bootstrap b = new Bootstrap();
            b.group(group).channel(NioDatagramChannel.class).option(ChannelOption.SO_BROADCAST, true)
                    .handler(new ChineseProverbClientHandler());
            Channel ch = b.bind(0).sync().channel();
            // ???????DP
            ch.writeAndFlush(
                    new DatagramPacket(Unpooled.copiedBuffer("???", CharsetUtil.UTF_8),
                            new InetSocketAddress("255.255.255.255", port)))
                    .sync();
            if (!ch.closeFuture().await(15000)) {
                System.out.println("?!");
            }
        } finally {
            group.shutdownGracefully();
        }
    }

    public static void main(String[] args) throws Exception {
        int port = 8080;
        if (args.length > 0) {
            try {
                port = Integer.parseInt(args[0]);
            } catch (NumberFormatException e) {
                e.printStackTrace();
            }
        }
        new ChineseProverbClient().run(port);
    }
}