94 lines
3.2 KiB
Java
94 lines
3.2 KiB
Java
/*
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* Copyright 2011 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.example.echo;
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import java.net.InetSocketAddress;
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import java.util.concurrent.Executors;
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import io.netty.bootstrap.ClientBootstrap;
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import io.netty.channel.ChannelFuture;
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import io.netty.channel.ChannelPipeline;
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import io.netty.channel.ChannelPipelineFactory;
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import io.netty.channel.Channels;
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import io.netty.channel.socket.nio.NioClientSocketChannelFactory;
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/**
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* Sends one message when a connection is open and echoes back any received
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* data to the server. Simply put, the echo client initiates the ping-pong
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* traffic between the echo client and server by sending the first message to
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* the server.
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*/
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public class EchoClient {
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public static void main(String[] args) throws Exception {
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// Print usage if no argument is specified.
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if (args.length < 2 || args.length > 3) {
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System.err.println(
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"Usage: " + EchoClient.class.getSimpleName() +
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" <host> <port> [<first message size>]");
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return;
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}
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// Parse options.
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final String host = args[0];
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final int port = Integer.parseInt(args[1]);
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final int firstMessageSize;
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if (args.length == 3) {
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firstMessageSize = Integer.parseInt(args[2]);
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} else {
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firstMessageSize = 256;
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}
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new EchoClient(host, port, firstMessageSize).run();
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}
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private final String host;
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private final int port;
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private final int firstMessageSize;
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public EchoClient(String host, int port, int firstMessageSize) {
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this.host = host;
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this.port = port;
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this.firstMessageSize = firstMessageSize;
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}
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public void run() {
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// Configure the client.
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ClientBootstrap bootstrap = new ClientBootstrap(
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new NioClientSocketChannelFactory(
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Executors.newCachedThreadPool(),
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Executors.newCachedThreadPool()));
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// Set up the pipeline factory.
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bootstrap.setPipelineFactory(new ChannelPipelineFactory() {
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@Override
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public ChannelPipeline getPipeline() throws Exception {
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return Channels.pipeline(
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new EchoClientHandler(firstMessageSize));
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}
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});
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// Start the connection attempt.
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ChannelFuture future = bootstrap.connect(new InetSocketAddress(host, port));
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// Wait until the connection is closed or the connection attempt fails.
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future.getChannel().getCloseFuture().awaitUninterruptibly();
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// Shut down thread pools to exit.
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bootstrap.releaseExternalResources();
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}
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}
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