com.xiovr.unibot.utils.EchoServer.java Source code

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Here is the source code for com.xiovr.unibot.utils.EchoServer.java

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/**
 * Copyright (c) 2014 xio4
 * Universal bot for lineage-like games (Archeage, Lineage2 etc)
 *
 * This file is part of Unibot.
 *
 * Unibot is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.xiovr.unibot.utils;

import java.net.InetSocketAddress;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
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.NioServerSocketChannel;
import io.netty.handler.logging.LogLevel;
import io.netty.handler.logging.LoggingHandler;

/**
 * Echoes back any received data from a client.
 */
public final class EchoServer {

    private InetSocketAddress addr;

    public EchoServer(InetSocketAddress addr) {
        this.addr = addr;
    }

    private ChannelFuture cf;
    private EventLoopGroup bossGroup;
    private EventLoopGroup workerGroup;
    private volatile boolean bStarted;

    public void startServer() {

        if (bStarted) {
            return;
        }
        // Configure the server.
        bossGroup = new NioEventLoopGroup(1);
        workerGroup = new NioEventLoopGroup();
        try {
            ServerBootstrap b = new ServerBootstrap();
            b.group(bossGroup, workerGroup).channel(NioServerSocketChannel.class)
                    .option(ChannelOption.SO_BACKLOG, 100).handler(new LoggingHandler(LogLevel.INFO))
                    .childHandler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        public void initChannel(SocketChannel ch) throws Exception {
                            ChannelPipeline p = ch.pipeline();
                            p.addLast(new EchoServerHandler());
                        }
                    });

            // Start the server.
            cf = b.bind(addr).addListener(new ChannelFutureListener() {
                @Override
                public void operationComplete(ChannelFuture future) throws Exception {
                    //               System.out.println("Echo server started");
                    EchoServer.this.bStarted = true;
                }
            });
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    public void close() {
        // Wait until the server socket is closed.
        assert cf != null;
        try {
            cf.channel().close().sync();
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            // Shut down all event loops to terminate all threads.
            bossGroup.shutdownGracefully();
            workerGroup.shutdownGracefully();
        }
        bStarted = false;
    }

    public boolean getStarted() {
        return bStarted;
    }
}