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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.telnet;
17  
18  import org.jboss.netty.channel.ChannelPipeline;
19  import org.jboss.netty.channel.ChannelPipelineFactory;
20  import org.jboss.netty.handler.codec.frame.DelimiterBasedFrameDecoder;
21  import org.jboss.netty.handler.codec.frame.Delimiters;
22  import org.jboss.netty.handler.codec.string.StringDecoder;
23  import org.jboss.netty.handler.codec.string.StringEncoder;
24  import org.jboss.netty.handler.ssl.SslContext;
25  
26  import static org.jboss.netty.channel.Channels.*;
27  
28  /**
29   * Creates a newly configured {@link ChannelPipeline} for a new channel.
30   */
31  public class TelnetServerPipelineFactory implements ChannelPipelineFactory {
32  
33      private final SslContext sslCtx;
34  
35      public TelnetServerPipelineFactory(SslContext sslCtx) {
36          this.sslCtx = sslCtx;
37      }
38  
39      public ChannelPipeline getPipeline() {
40          // Create a default pipeline implementation.
41          ChannelPipeline pipeline = pipeline();
42  
43          if (sslCtx != null) {
44              pipeline.addLast("ssl", sslCtx.newHandler());
45          }
46  
47          // Add the text line codec combination first,
48          pipeline.addLast("framer", new DelimiterBasedFrameDecoder(
49                  8192, Delimiters.lineDelimiter()));
50          pipeline.addLast("decoder", new StringDecoder());
51          pipeline.addLast("encoder", new StringEncoder());
52  
53          // and then business logic.
54          pipeline.addLast("handler", new TelnetServerHandler());
55  
56          return pipeline;
57      }
58  }