org.nmrfx.server.Server.java Source code

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Here is the source code for org.nmrfx.server.Server.java

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/*
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package org.nmrfx.server;

/**
 *
 * @author brucejohnson
 */
import io.netty.bootstrap.ServerBootstrap;

import io.netty.channel.ChannelFuture;
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.NioServerSocketChannel;
import java.io.IOException;
import java.net.ServerSocket;
import java.util.function.Consumer;
import java.util.logging.Level;
import java.util.logging.Logger;

public class Server implements Runnable {

    private Consumer consumer;
    private int port;

    public Server(int port, Consumer consumer) {
        this.port = port;
        this.consumer = consumer;
    }

    @Override
    public void run() {
        EventLoopGroup bossGroup = new NioEventLoopGroup(); // (1)
        EventLoopGroup workerGroup = new NioEventLoopGroup();
        try {
            ServerBootstrap b = new ServerBootstrap(); // (2)
            b.group(bossGroup, workerGroup).channel(NioServerSocketChannel.class) // (3)
                    .childHandler(new ChannelInitializer<SocketChannel>() { // (4)
                        @Override
                        public void initChannel(SocketChannel ch) throws Exception {
                            ch.pipeline().addLast(new ServerHandler(consumer));
                        }
                    }).option(ChannelOption.SO_BACKLOG, 128) // (5)
                    .childOption(ChannelOption.SO_KEEPALIVE, true); // (6)

            // Bind and start to accept incoming connections.
            ChannelFuture f = b.bind(port).sync(); // (7)

            System.out.println("NMRFx server started using port " + port);

            // Wait until the server socket is closed.
            // In this example, this does not happen, but you can do that to gracefully
            // shut down your server.
            f.channel().closeFuture().sync();
        } catch (InterruptedException ex) {
            Logger.getLogger(Server.class.getName()).log(Level.SEVERE, null, ex);
        } finally {
            workerGroup.shutdownGracefully();
            bossGroup.shutdownGracefully();
        }
    }

    public static void startServer(int port, Consumer consumer) {
        Server server = new Server(port, consumer);
        Thread myThread = new Thread(server);
        myThread.start();
    }

    public static int getRandomPort() throws IOException {
        ServerSocket s = new ServerSocket(0);
        int port = s.getLocalPort();
        s.close();
        //        System.out.println("random port = " + port);
        return port;
    }

}