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   /*
    * 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.channel.socket.nio;
  
  import org.jboss.netty.channel.ChannelException;
  import org.jboss.netty.channel.ChannelFactory;
  import org.jboss.netty.channel.ChannelFuture;
  import org.jboss.netty.channel.ChannelPipeline;
  import org.jboss.netty.channel.ChannelSink;
  import org.jboss.netty.logging.InternalLogger;
  import org.jboss.netty.logging.InternalLoggerFactory;
  import org.jboss.netty.util.Timeout;
  
  import java.io.IOException;
  import java.net.SocketAddress;
  import java.nio.channels.SocketChannel;
  
  import static org.jboss.netty.channel.Channels.*;
  
  final class NioClientSocketChannel extends NioSocketChannel {
  
      private static final InternalLogger logger =
          InternalLoggerFactory.getInstance(NioClientSocketChannel.class);
  
      private static SocketChannel newSocket() {
          SocketChannel socket;
          try {
              socket = SocketChannel.open();
          } catch (IOException e) {
              throw new ChannelException("Failed to open a socket.", e);
          }
  
          boolean success = false;
          try {
              socket.configureBlocking(false);
              success = true;
          } catch (IOException e) {
              throw new ChannelException("Failed to enter non-blocking mode.", e);
          } finally {
              if (!success) {
                  try {
                      socket.close();
                  } catch (IOException e) {
                      if (logger.isWarnEnabled()) {
                          logger.warn(
                                  "Failed to close a partially initialized socket.",
                                  e);
                      }
                  }
              }
          }
  
          return socket;
      }
  
      volatile ChannelFuture connectFuture;
      volatile boolean boundManually;
  
      // Does not need to be volatile as it's accessed by only one thread.
      long connectDeadlineNanos;
      volatile SocketAddress requestedRemoteAddress;
  
      volatile Timeout timoutTimer;
  
      NioClientSocketChannel(
              ChannelFactory factory, ChannelPipeline pipeline,
              ChannelSink sink, NioWorker worker) {
  
          super(null, factory, pipeline, sink, newSocket(), worker);
          fireChannelOpen(this);
      }
  }