org.didinem.client.RpcClient.java Source code

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Here is the source code for org.didinem.client.RpcClient.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 org.didinem.client;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.*;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
import io.netty.handler.codec.LengthFieldPrepender;
import io.netty.handler.codec.string.StringDecoder;

/**
 * @author lilinfeng
 * @version 1.0
 * @date 2014214
 */
public class RpcClient {

    private Channel channel;

    public void connect(int port, String host) throws Exception {
        // ?NIO
        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 LengthFieldBasedFrameDecoder(1024 * 1024, 0, 4, 0, 4));
                            ch.pipeline().addLast(new LengthFieldPrepender(4, false));
                            ch.pipeline().addLast(new StringDecoder());
                            ch.pipeline().addLast(new RpcClientHandler());
                        }
                    });

            // ??
            ChannelFuture f = b.connect(host, port).sync();
            channel = f.channel();

        } finally {
            // NIO
            group.shutdownGracefully();
        }
    }

    /**
     * @param args
     * @throws Exception
     */
    public static void main(String[] args) throws Exception {
        int port = 20880;
        if (args != null && args.length > 0) {
            try {
                port = Integer.valueOf(args[0]);
            } catch (NumberFormatException e) {
                // 
            }
        }
        RpcClient rpcClient = new RpcClient();
        rpcClient.connect(port, "127.0.0.1");
        rpcClient.channel.writeAndFlush("aaa");

        // 
        rpcClient.channel.closeFuture().sync();
    }
}