/*
    * 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 static org.jboss.netty.channel.Channels.*;
  
  import java.io.IOException;
  import java.net.InetSocketAddress;
  import java.nio.channels.Selector;
  import java.nio.channels.ServerSocketChannel;
  import java.util.concurrent.locks.Lock;
  import java.util.concurrent.locks.ReentrantLock;
  
  import org.jboss.netty.channel.AbstractServerChannel;
  import org.jboss.netty.channel.ChannelException;
  import org.jboss.netty.channel.ChannelFactory;
  import org.jboss.netty.channel.ChannelPipeline;
  import org.jboss.netty.channel.ChannelSink;
  import org.jboss.netty.channel.socket.DefaultServerSocketChannelConfig;
  import org.jboss.netty.channel.socket.ServerSocketChannelConfig;
  import org.jboss.netty.logging.InternalLogger;
  import org.jboss.netty.logging.InternalLoggerFactory;
  
  class NioServerSocketChannel extends AbstractServerChannel
                               implements org.jboss.netty.channel.socket.ServerSocketChannel {
  
      private static final InternalLogger logger =
          InternalLoggerFactory.getInstance(NioServerSocketChannel.class);
  
      final ServerSocketChannel socket;
      final Lock shutdownLock = new ReentrantLock();
      volatile Selector selector;
      private final ServerSocketChannelConfig config;
  
      NioServerSocketChannel(
              ChannelFactory factory,
              ChannelPipeline pipeline,
              ChannelSink sink) {
  
          super(factory, pipeline, sink);
  
          try {
              socket = ServerSocketChannel.open();
          } catch (IOException e) {
              throw new ChannelException(
                      "Failed to open a server socket.", e);
          }
  
          try {
              socket.configureBlocking(false);
          } catch (IOException e) {
              try {
                  socket.close();
              } catch (IOException e2) {
                  if (logger.isWarnEnabled()) {
                      logger.warn(
                              "Failed to close a partially initialized socket.", e2);
                  }
  
              }
  
              throw new ChannelException("Failed to enter non-blocking mode.", e);
          }
  
          config = new DefaultServerSocketChannelConfig(socket.socket());
  
          fireChannelOpen(this);
      }
  
      public ServerSocketChannelConfig getConfig() {
          return config;
      }
  
      public InetSocketAddress getLocalAddress() {
          return (InetSocketAddress) socket.socket().getLocalSocketAddress();
      }
  
      public InetSocketAddress getRemoteAddress() {
          return null;
      }
  
      public boolean isBound() {
          return isOpen() && socket.socket().isBound();
      }
  
      @Override
     protected boolean setClosed() {
         return super.setClosed();
     }
 }