Java tutorial
/* * 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 com.hxr.javatone.concurrency.netty.official.localecho; import io.netty.bootstrap.Bootstrap; import io.netty.bootstrap.ServerBootstrap; import io.netty.channel.Channel; import io.netty.channel.ChannelFuture; import io.netty.channel.ChannelInitializer; import io.netty.channel.DefaultEventLoopGroup; import io.netty.channel.EventLoopGroup; import io.netty.channel.local.LocalAddress; import io.netty.channel.local.LocalChannel; import io.netty.channel.local.LocalServerChannel; import io.netty.channel.nio.NioEventLoopGroup; import io.netty.handler.logging.LogLevel; import io.netty.handler.logging.LoggingHandler; import java.io.BufferedReader; import java.io.InputStreamReader; public class LocalEcho { private final String port; public LocalEcho(String port) { this.port = port; } public void run() throws Exception { // Address to bind on / connect to. final LocalAddress addr = new LocalAddress(port); EventLoopGroup serverGroup = new DefaultEventLoopGroup(); EventLoopGroup clientGroup = new NioEventLoopGroup(); // NIO event loops are also OK try { // Note that we can use any event loop to ensure certain local channels // are handled by the same event loop thread which drives a certain socket channel // to reduce the communication latency between socket channels and local channels. ServerBootstrap sb = new ServerBootstrap(); sb.group(serverGroup).channel(LocalServerChannel.class) .handler(new ChannelInitializer<LocalServerChannel>() { @Override public void initChannel(LocalServerChannel ch) throws Exception { ch.pipeline().addLast(new LoggingHandler(LogLevel.INFO)); } }).childHandler(new ChannelInitializer<LocalChannel>() { @Override public void initChannel(LocalChannel ch) throws Exception { ch.pipeline().addLast(new LoggingHandler(LogLevel.INFO), new LocalEchoServerHandler()); } }); Bootstrap cb = new Bootstrap(); cb.group(clientGroup).channel(LocalChannel.class).handler(new ChannelInitializer<LocalChannel>() { @Override public void initChannel(LocalChannel ch) throws Exception { ch.pipeline().addLast(new LoggingHandler(LogLevel.INFO), new LocalEchoClientHandler()); } }); // Start the server. sb.bind(addr).sync(); // Start the client. Channel ch = cb.connect(addr).sync().channel(); // Read commands from the stdin. System.out.println("Enter text (quit to end)"); ChannelFuture lastWriteFuture = null; BufferedReader in = new BufferedReader(new InputStreamReader(System.in)); for (;;) { String line = in.readLine(); if (line == null || "quit".equalsIgnoreCase(line)) { break; } // Sends the received line to the server. lastWriteFuture = ch.writeAndFlush(line); } // Wait until all messages are flushed before closing the channel. if (lastWriteFuture != null) { lastWriteFuture.awaitUninterruptibly(); } } finally { serverGroup.shutdownGracefully(); clientGroup.shutdownGracefully(); } } public static void main(String[] args) throws Exception { new LocalEcho("1").run(); } }