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1   /*
2    * Copyright 2012 The Netty Project
3    *
4    * The Netty Project licenses this file to you under the Apache License,
5    * version 2.0 (the "License"); you may not use this file except in compliance
6    * with the 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.factorial;
17  
18  import org.jboss.netty.bootstrap.ClientBootstrap;
19  import org.jboss.netty.channel.Channel;
20  import org.jboss.netty.channel.ChannelFuture;
21  import org.jboss.netty.channel.socket.nio.NioClientSocketChannelFactory;
22  import org.jboss.netty.handler.ssl.SslContext;
23  import org.jboss.netty.handler.ssl.util.InsecureTrustManagerFactory;
24  
25  import java.net.InetSocketAddress;
26  import java.util.concurrent.Executors;
27  
28  /**
29   * Sends a sequence of integers to a {@link FactorialServer} to calculate
30   * the factorial of the specified integer.
31   */
32  public final class FactorialClient {
33  
34      static final boolean SSL = System.getProperty("ssl") != null;
35      static final String HOST = System.getProperty("host", "127.0.0.1");
36      static final int PORT = Integer.parseInt(System.getProperty("port", "8322"));
37      static final int COUNT = Integer.parseInt(System.getProperty("count", "1000"));
38  
39      public static void main(String[] args) throws Exception {
40          // Configure SSL.
41          final SslContext sslCtx;
42          if (SSL) {
43              sslCtx = SslContext.newClientContext(InsecureTrustManagerFactory.INSTANCE);
44          } else {
45              sslCtx = null;
46          }
47  
48          // Configure the bootstrap.
49          ClientBootstrap bootstrap = new ClientBootstrap(
50                  new NioClientSocketChannelFactory(
51                          Executors.newCachedThreadPool(),
52                          Executors.newCachedThreadPool()));
53  
54          try {
55              bootstrap.setPipelineFactory(new FactorialClientPipelineFactory(sslCtx));
56  
57              // Make a new connection.
58              ChannelFuture connectFuture = bootstrap.connect(new InetSocketAddress(HOST, PORT));
59  
60              // Wait until the connection is made successfully.
61              Channel channel = connectFuture.sync().getChannel();
62  
63              // Get the handler instance to retrieve the answer.
64              FactorialClientHandler handler = (FactorialClientHandler) channel.getPipeline().getLast();
65  
66              // Print out the answer.
67              System.err.format("Factorial of %,d is: %,d", COUNT, handler.getFactorial());
68          } finally {
69              // Shut down all thread pools to exit.
70              bootstrap.releaseExternalResources();
71          }
72      }
73  }