Java tutorial
/* * Copyright 2012 Brad Anderson * * The Franz 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 com.mapr.franz.netty; import io.netty.bootstrap.ServerBootstrap; import io.netty.channel.ChannelFuture; import io.netty.channel.ChannelInitializer; import io.netty.channel.ChannelOption; import io.netty.channel.socket.SocketChannel; import io.netty.channel.socket.nio.NioEventLoopGroup; import io.netty.channel.socket.nio.NioServerSocketChannel; import io.netty.handler.logging.LogLevel; import io.netty.handler.logging.LoggingHandler; import java.net.InetSocketAddress; /** * Echoes back any received data from a client. */ public class FranzServer { private final int port; public FranzServer(int port) { this.port = port; } public void run() throws Exception { // Configure the server. ServerBootstrap b = new ServerBootstrap(); try { b.group(new NioEventLoopGroup(), new NioEventLoopGroup()).channel(NioServerSocketChannel.class) .option(ChannelOption.SO_BACKLOG, 100).localAddress(new InetSocketAddress(port)) .childOption(ChannelOption.TCP_NODELAY, true).handler(new LoggingHandler(LogLevel.INFO)) .childHandler(new ChannelInitializer<SocketChannel>() { @Override public void initChannel(SocketChannel ch) throws Exception { ch.pipeline().addLast(new LoggingHandler(LogLevel.INFO), new FranzServerHandler()); } }); // Start the server. ChannelFuture f = b.bind().sync(); // Wait until the server socket is closed. f.channel().closeFuture().sync(); } finally { // Shut down all event loops to terminate all threads. b.shutdown(); } } public static void main(String[] args) throws Exception { int port; if (args.length > 0) { port = Integer.parseInt(args[0]); } else { port = 8080; } new FranzServer(port).run(); } }