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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.factorial;
17  
18  import static org.jboss.netty.channel.Channels.*;
19  
20  import org.jboss.netty.channel.ChannelPipeline;
21  import org.jboss.netty.channel.ChannelPipelineFactory;
22  import org.jboss.netty.handler.codec.compression.ZlibDecoder;
23  import org.jboss.netty.handler.codec.compression.ZlibEncoder;
24  import org.jboss.netty.handler.codec.compression.ZlibWrapper;
25  
26  /**
27   * Creates a newly configured {@link ChannelPipeline} for a client-side channel.
28   *
29   * @author <a href="http://www.jboss.org/netty/">The Netty Project</a>
30   * @author <a href="http://gleamynode.net/">Trustin Lee</a>
31   *
32   * @version $Rev: 2080 $, $Date: 2010-01-26 18:04:19 +0900 (Tue, 26 Jan 2010) $
33   */
34  public class FactorialClientPipelineFactory implements
35          ChannelPipelineFactory {
36  
37      private final int count;
38  
39      public FactorialClientPipelineFactory(int count) {
40          this.count = count;
41      }
42  
43      public ChannelPipeline getPipeline() throws Exception {
44          ChannelPipeline pipeline = pipeline();
45  
46          // Enable stream compression (you can remove these two if unnecessary)
47          pipeline.addLast("deflater", new ZlibEncoder(ZlibWrapper.GZIP));
48          pipeline.addLast("inflater", new ZlibDecoder(ZlibWrapper.GZIP));
49  
50          // Add the number codec first,
51          pipeline.addLast("decoder", new BigIntegerDecoder());
52          pipeline.addLast("encoder", new NumberEncoder());
53  
54          // and then business logic.
55          pipeline.addLast("handler", new FactorialClientHandler(count));
56  
57          return pipeline;
58      }
59  }