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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 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 server-side channel.
    28   */
    29  public class FactorialServerPipelineFactory implements
    30          ChannelPipelineFactory {
    31
    32      public ChannelPipeline getPipeline() throws Exception {
    33          ChannelPipeline pipeline = pipeline();
    34
    35          // Enable stream compression (you can remove these two if unnecessary)
    36          pipeline.addLast("deflater", new ZlibEncoder(ZlibWrapper.GZIP));
    37          pipeline.addLast("inflater", new ZlibDecoder(ZlibWrapper.GZIP));
    38
    39          // Add the number codec first,
    40          pipeline.addLast("decoder", new BigIntegerDecoder());
    41          pipeline.addLast("encoder", new NumberEncoder());
    42
    43          // and then business logic.
    44          // Please note we create a handler for every new channel
    45          // because it has stateful properties.
    46          pipeline.addLast("handler", new FactorialServerHandler());
    47
    48          return pipeline;
    49      }
    50  }