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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.local;
    17
    18  import java.util.concurrent.Executor;
    19
    20  import org.jboss.netty.channel.ChannelDownstreamHandler;
    21  import org.jboss.netty.channel.ChannelEvent;
    22  import org.jboss.netty.channel.ChannelHandlerContext;
    23  import org.jboss.netty.channel.ChannelPipeline;
    24  import org.jboss.netty.channel.ChannelPipelineFactory;
    25  import org.jboss.netty.channel.ChannelUpstreamHandler;
    26  import org.jboss.netty.channel.Channels;
    27  import org.jboss.netty.channel.MessageEvent;
    28  import org.jboss.netty.handler.codec.string.StringDecoder;
    29  import org.jboss.netty.handler.codec.string.StringEncoder;
    30  import org.jboss.netty.handler.execution.ExecutionHandler;
    31
    32  /**
    33   * @author <a href="http://www.jboss.org/netty/">The Netty Project</a>
    34   * @author Andy Taylor (andy.taylor@jboss.org)
    35   * @author Frederic Bregier (fredbregier@free.fr)
    36   * @version $Rev: 2235 $, $Date: 2010-04-06 18:40:35 +0900 (Tue, 06 Apr 2010) $
    37   */
    38  public class LocalServerPipelineFactory implements ChannelPipelineFactory {
    39
    40      private final ExecutionHandler executionHandler;
    41
    42      public LocalServerPipelineFactory(Executor eventExecutor) {
    43          executionHandler = new ExecutionHandler(eventExecutor);
    44      }
    45
    46      public ChannelPipeline getPipeline() throws Exception {
    47          final ChannelPipeline pipeline = Channels.pipeline();
    48          pipeline.addLast("decoder", new StringDecoder());
    49          pipeline.addLast("encoder", new StringEncoder());
    50          pipeline.addLast("executor", executionHandler);
    51          pipeline.addLast("handler", new EchoCloseServerHandler());
    52          return pipeline;
    53      }
    54
    55      static class EchoCloseServerHandler implements ChannelUpstreamHandler, ChannelDownstreamHandler {
    56          public void handleUpstream(ChannelHandlerContext ctx, ChannelEvent e)
    57                  throws Exception {
    58              if (e instanceof MessageEvent) {
    59                  final MessageEvent evt = (MessageEvent) e;
    60                  String msg = (String) evt.getMessage();
    61                  if (msg.equalsIgnoreCase("quit")) {
    62                      Channels.close(e.getChannel());
    63                      return;
    64                  }
    65              }
    66              ctx.sendUpstream(e);
    67          }
    68
    69          public void handleDownstream(ChannelHandlerContext ctx, ChannelEvent e) {
    70              if (e instanceof MessageEvent) {
    71                  final MessageEvent evt = (MessageEvent) e;
    72                  String msg = (String) evt.getMessage();
    73                  if (msg.equalsIgnoreCase("quit")) {
    74                      Channels.close(e.getChannel());
    75                      return;
    76                  }
    77                  System.err.println("SERVER:"+msg);
    78                  // Write back
    79                  Channels.write(e.getChannel(), msg);
    80              }
    81              ctx.sendDownstream(e);
    82          }
    83      }
    84  }