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    1   /*
    2    * Copyright 2009 Red Hat, Inc.
    3    *
    4    * Red Hat licenses this file to you under the Apache License, version 2.0
    5    * (the "License"); you may not use this file except in compliance with the
    6    * License.  You may obtain a copy of the License at:
    7    *
    8    *    http://www.apache.org/licenses/LICENSE-2.0
    9    *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
    12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
    13   * License for the specific language governing permissions and limitations
    14   * under the License.
    15   */
    16  package org.jboss.netty.example.discard;
    17
    18  import java.net.InetSocketAddress;
    19  import java.util.concurrent.Executors;
    20
    21  import org.jboss.netty.bootstrap.ClientBootstrap;
    22  import org.jboss.netty.channel.ChannelFuture;
    23  import org.jboss.netty.channel.ChannelPipeline;
    24  import org.jboss.netty.channel.ChannelPipelineFactory;
    25  import org.jboss.netty.channel.Channels;
    26  import org.jboss.netty.channel.socket.nio.NioClientSocketChannelFactory;
    27
    28  /**
    29   * Keeps sending random data to the specified address.
    30   *
    31   * @author <a href="http://www.jboss.org/netty/">The Netty Project</a>
    32   * @author <a href="http://gleamynode.net/">Trustin Lee</a>
    33   *
    34   * @version $Rev: 2080 $, $Date: 2010-01-26 18:04:19 +0900 (Tue, 26 Jan 2010) $
    35   */
    36  public class DiscardClient {
    37
    38      public static void main(String[] args) throws Exception {
    39          // Print usage if no argument is specified.
    40          if (args.length < 2 || args.length > 3) {
    41              System.err.println(
    42                      "Usage: " + DiscardClient.class.getSimpleName() +
    43                      " <host> <port> [<first message size>]");
    44              return;
    45          }
    46
    47          // Parse options.
    48          final String host = args[0];
    49          final int port = Integer.parseInt(args[1]);
    50          final int firstMessageSize;
    51          if (args.length == 3) {
    52              firstMessageSize = Integer.parseInt(args[2]);
    53          } else {
    54              firstMessageSize = 256;
    55          }
    56
    57          // Configure the client.
    58          ClientBootstrap bootstrap = new ClientBootstrap(
    59                  new NioClientSocketChannelFactory(
    60                          Executors.newCachedThreadPool(),
    61                          Executors.newCachedThreadPool()));
    62
    63          // Set up the pipeline factory.
    64          bootstrap.setPipelineFactory(new ChannelPipelineFactory() {
    65              public ChannelPipeline getPipeline() throws Exception {
    66                  return Channels.pipeline(
    67                          new DiscardClientHandler(firstMessageSize));
    68              }
    69          });
    70
    71          // Start the connection attempt.
    72          ChannelFuture future = bootstrap.connect(new InetSocketAddress(host, port));
    73
    74          // Wait until the connection is closed or the connection attempt fails.
    75          future.getChannel().getCloseFuture().awaitUninterruptibly();
    76
    77          // Shut down thread pools to exit.
    78          bootstrap.releaseExternalResources();
    79      }
    80  }