/*
    * Copyright 2012 The Netty Project
    *
    * The Netty Project licenses this file to you under the Apache License,
    * version 2.0 (the "License"); you may not use this file except in compliance
    * with the License. You may obtain a copy of the License at:
    *
    *   http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
   * License for the specific language governing permissions and limitations
   * under the License.
   */
  package org.jboss.netty.example.local;
  
  import java.util.concurrent.Executor;
  
  import org.jboss.netty.channel.ChannelDownstreamHandler;
  import org.jboss.netty.channel.ChannelEvent;
  import org.jboss.netty.channel.ChannelHandlerContext;
  import org.jboss.netty.channel.ChannelPipeline;
  import org.jboss.netty.channel.ChannelPipelineFactory;
  import org.jboss.netty.channel.ChannelUpstreamHandler;
  import org.jboss.netty.channel.Channels;
  import org.jboss.netty.channel.MessageEvent;
  import org.jboss.netty.handler.codec.string.StringDecoder;
  import org.jboss.netty.handler.codec.string.StringEncoder;
  import org.jboss.netty.handler.execution.ExecutionHandler;
  
  public class LocalServerPipelineFactory implements ChannelPipelineFactory {
  
      private final ExecutionHandler executionHandler;
  
      public LocalServerPipelineFactory(Executor eventExecutor) {
          executionHandler = new ExecutionHandler(eventExecutor);
      }
  
      public ChannelPipeline getPipeline() throws Exception {
          final ChannelPipeline pipeline = Channels.pipeline();
          pipeline.addLast("decoder", new StringDecoder());
          pipeline.addLast("encoder", new StringEncoder());
          pipeline.addLast("executor", executionHandler);
          pipeline.addLast("handler", new EchoCloseServerHandler());
          return pipeline;
      }
  
      static class EchoCloseServerHandler implements ChannelUpstreamHandler, ChannelDownstreamHandler {
          public void handleUpstream(ChannelHandlerContext ctx, ChannelEvent e)
                  throws Exception {
              if (e instanceof MessageEvent) {
                  final MessageEvent evt = (MessageEvent) e;
                  String msg = (String) evt.getMessage();
                  if (msg.equalsIgnoreCase("quit")) {
                      Channels.close(e.getChannel());
                      return;
                  }
              }
              ctx.sendUpstream(e);
          }
  
          public void handleDownstream(ChannelHandlerContext ctx, ChannelEvent e) {
              if (e instanceof MessageEvent) {
                  final MessageEvent evt = (MessageEvent) e;
                  String msg = (String) evt.getMessage();
                  if (msg.equalsIgnoreCase("quit")) {
                      Channels.close(e.getChannel());
                      return;
                  }
                  System.err.println("SERVER:" + msg);
                  // Write back
                  Channels.write(e.getChannel(), msg);
              }
              ctx.sendDownstream(e);
          }
      }
  }