com.fjn.helper.frameworkex.netty.v4.echotest.EchoServer.java Source code

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Here is the source code for com.fjn.helper.frameworkex.netty.v4.echotest.EchoServer.java

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/*
 *
 *  Copyright 2018 FJN Corp.
 *
 *  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.
 *
 *  Author                        Date                       Issue
 *  fs1194361820@163.com          2015-01-01                 Initial Version
 *
 */

package com.fjn.helper.frameworkex.netty.v4.echotest;

import java.net.InetSocketAddress;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;

public class EchoServer {
    private final int port;

    public EchoServer(int port) {
        this.port = port;
    }

    public void start() throws Exception {
        EventLoopGroup group = new NioEventLoopGroup();
        try {
            // Bootstraps the server
            ServerBootstrap b = new ServerBootstrap();

            // Specifies NIO transport, local socket address
            b.group(group);
            b.childGroup();
            b.channel(NioServerSocketChannel.class);
            b.localAddress(new InetSocketAddress(port));

            // Adds handler to channel pipeline
            b.childHandler(new ChannelInitializer<SocketChannel>() {
                @Override
                protected void initChannel(SocketChannel ch) throws Exception {
                    ch.pipeline().addLast(new EchoServerHandler());
                }
            });

            // Binds server, waits for server to close, and releases resources
            ChannelFuture f = b.bind().sync();
            System.out.println(EchoServer.class.getName() + " started and listen on " + f.channel().localAddress());
            f.channel().closeFuture().sync();
        } finally {
            group.shutdownGracefully().sync();
        }

    }

    public static void main(String[] args) throws Exception {
        if (args.length > 1) {
            System.err.println("Usage: " + EchoServer.class.getSimpleName() + " <port>");
        }

        int port = -1;
        if (args.length < 1) {
            port = 8080;
        } else {
            port = Integer.parseInt(args[0]);
        }
        new EchoServer(port).start();
    }
}