com.doctor.netty5.ebook.netty_the_definitive_guide.TimerClient.java Source code

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Here is the source code for com.doctor.netty5.ebook.netty_the_definitive_guide.TimerClient.java

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/*
 * Copyright (C) 2014- now() The  Netty5-2015  Authors
 *
 * https://github.com/sdcuike
 *
 * 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.doctor.netty5.ebook.netty_the_definitive_guide;

import io.netty.bootstrap.Bootstrap;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelHandlerAdapter;
import io.netty.channel.ChannelHandlerContext;
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 java.nio.charset.StandardCharsets;

/**
 * @author doctor
 *
 * @time 2015622 ?4:19:37
 */
public class TimerClient {

    public static void main(String[] args) throws InterruptedException {
        TimerClient timerClient = new TimerClient();
        timerClient.connect("localhost", 8899);

    }

    public void connect(String host, int port) throws InterruptedException {
        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
                        protected void initChannel(SocketChannel ch) throws Exception {
                            ch.pipeline().addLast(new TimeClientHander());

                        }
                    });

            ChannelFuture f = b.connect(host, port).sync();
            f.channel().closeFuture().sync();
        } finally {
            group.shutdownGracefully();
        }

    }

    public static class TimeClientHander extends ChannelHandlerAdapter {
        private final ByteBuf firstMessage;

        public TimeClientHander() {
            byte[] req = "QUERY_TIME_ORDER".getBytes();
            firstMessage = Unpooled.buffer(req.length);
            firstMessage.writeBytes(req);
        }

        @Override
        public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
            System.err.println(cause.getMessage());
            ctx.close();
        }

        @Override
        public void channelActive(ChannelHandlerContext ctx) throws Exception {
            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, StandardCharsets.UTF_8);
            System.out.println("Now is :" + body);
        }

    }
}