/*
    * Copyright 2009 Red Hat, Inc.
    *
    * Red Hat 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.channel.socket.oio;
  
  import static org.jboss.netty.channel.Channels.*;
  
  import java.io.PushbackInputStream;
  import java.net.SocketAddress;
  import java.util.concurrent.Executor;
  
  import org.jboss.netty.channel.AbstractChannelSink;
  import org.jboss.netty.channel.ChannelEvent;
  import org.jboss.netty.channel.ChannelFuture;
  import org.jboss.netty.channel.ChannelFutureListener;
  import org.jboss.netty.channel.ChannelPipeline;
  import org.jboss.netty.channel.ChannelState;
  import org.jboss.netty.channel.ChannelStateEvent;
  import org.jboss.netty.channel.MessageEvent;
  import org.jboss.netty.util.ThreadRenamingRunnable;
  import org.jboss.netty.util.internal.DeadLockProofWorker;
  
  /**
   *
   * @author <a href="http://www.jboss.org/netty/">The Netty Project</a>
   * @author <a href="http://gleamynode.net/">Trustin Lee</a>
   *
   * @version $Rev: 2341 $, $Date: 2010-07-07 13:44:23 +0900 (Wed, 07 Jul 2010) $
   *
   */
  class OioClientSocketPipelineSink extends AbstractChannelSink {
  
      private final Executor workerExecutor;
  
      OioClientSocketPipelineSink(Executor workerExecutor) {
          this.workerExecutor = workerExecutor;
      }
  
      public void eventSunk(
              ChannelPipeline pipeline, ChannelEvent e) throws Exception {
          OioClientSocketChannel channel = (OioClientSocketChannel) e.getChannel();
          ChannelFuture future = e.getFuture();
          if (e instanceof ChannelStateEvent) {
              ChannelStateEvent stateEvent = (ChannelStateEvent) e;
              ChannelState state = stateEvent.getState();
              Object value = stateEvent.getValue();
              switch (state) {
              case OPEN:
                  if (Boolean.FALSE.equals(value)) {
                      OioWorker.close(channel, future);
                  }
                  break;
              case BOUND:
                  if (value != null) {
                      bind(channel, future, (SocketAddress) value);
                  } else {
                      OioWorker.close(channel, future);
                  }
                  break;
              case CONNECTED:
                  if (value != null) {
                      connect(channel, future, (SocketAddress) value);
                  } else {
                      OioWorker.close(channel, future);
                  }
                  break;
              case INTEREST_OPS:
                  OioWorker.setInterestOps(channel, future, ((Integer) value).intValue());
                  break;
              }
          } else if (e instanceof MessageEvent) {
              OioWorker.write(
                      channel, future,
                      ((MessageEvent) e).getMessage());
          }
      }
  
      private void bind(
              OioClientSocketChannel channel, ChannelFuture future,
              SocketAddress localAddress) {
          try {
              channel.socket.bind(localAddress);
              future.setSuccess();
              fireChannelBound(channel, channel.getLocalAddress());
          } catch (Throwable t) {
              future.setFailure(t);
              fireExceptionCaught(channel, t);
         }
     }
 
     private void connect(
             OioClientSocketChannel channel, ChannelFuture future,
             SocketAddress remoteAddress) {
 
         boolean bound = channel.isBound();
         boolean connected = false;
         boolean workerStarted = false;
 
         future.addListener(ChannelFutureListener.CLOSE_ON_FAILURE);
 
         try {
             channel.socket.connect(
                     remoteAddress, channel.getConfig().getConnectTimeoutMillis());
             connected = true;
 
             // Obtain I/O stream.
             channel.in = new PushbackInputStream(channel.socket.getInputStream(), 1);
             channel.out = channel.socket.getOutputStream();
 
             // Fire events.
             future.setSuccess();
             if (!bound) {
                 fireChannelBound(channel, channel.getLocalAddress());
             }
             fireChannelConnected(channel, channel.getRemoteAddress());
 
             // Start the business.
             DeadLockProofWorker.start(
                     workerExecutor,
                     new ThreadRenamingRunnable(
                             new OioWorker(channel),
                             "Old I/O client worker (" + channel + ')'));
             workerStarted = true;
         } catch (Throwable t) {
             future.setFailure(t);
             fireExceptionCaught(channel, t);
         } finally {
             if (connected && !workerStarted) {
                 OioWorker.close(channel, future);
             }
         }
     }
 }