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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 client-side channel.
    28   */
    29  public class FactorialClientPipelineFactory implements
    30          ChannelPipelineFactory {
    31
    32      private final int count;
    33
    34      public FactorialClientPipelineFactory(int count) {
    35          this.count = count;
    36      }
    37
    38      public ChannelPipeline getPipeline() throws Exception {
    39          ChannelPipeline pipeline = pipeline();
    40
    41          // Enable stream compression (you can remove these two if unnecessary)
    42          pipeline.addLast("deflater", new ZlibEncoder(ZlibWrapper.GZIP));
    43          pipeline.addLast("inflater", new ZlibDecoder(ZlibWrapper.GZIP));
    44
    45          // Add the number codec first,
    46          pipeline.addLast("decoder", new BigIntegerDecoder());
    47          pipeline.addLast("encoder", new NumberEncoder());
    48
    49          // and then business logic.
    50          pipeline.addLast("handler", new FactorialClientHandler(count));
    51
    52          return pipeline;
    53      }
    54  }