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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.channel.ChannelPipeline;
19  import org.jboss.netty.channel.ChannelPipelineFactory;
20  import org.jboss.netty.handler.codec.compression.ZlibDecoder;
21  import org.jboss.netty.handler.codec.compression.ZlibEncoder;
22  import org.jboss.netty.handler.codec.compression.ZlibWrapper;
23  import org.jboss.netty.handler.ssl.SslContext;
24  
25  import static org.jboss.netty.channel.Channels.*;
26  
27  /**
28   * Creates a newly configured {@link ChannelPipeline} for a server-side channel.
29   */
30  public class FactorialServerPipelineFactory implements ChannelPipelineFactory {
31  
32      private final SslContext sslCtx;
33  
34      public FactorialServerPipelineFactory(SslContext sslCtx) {
35          this.sslCtx = sslCtx;
36      }
37  
38      public ChannelPipeline getPipeline() {
39          ChannelPipeline pipeline = pipeline();
40  
41          if (sslCtx != null) {
42              pipeline.addLast("ssl", sslCtx.newHandler());
43          }
44  
45          // Enable stream compression (you can remove these two if unnecessary)
46          pipeline.addLast("deflater", new ZlibEncoder(ZlibWrapper.GZIP));
47          pipeline.addLast("inflater", new ZlibDecoder(ZlibWrapper.GZIP));
48  
49          // Add the number codec first,
50          pipeline.addLast("decoder", new BigIntegerDecoder());
51          pipeline.addLast("encoder", new NumberEncoder());
52  
53          // and then business logic.
54          // Please note we create a handler for every new channel
55          // because it has stateful properties.
56          pipeline.addLast("handler", new FactorialServerHandler());
57  
58          return pipeline;
59      }
60  }