/**
    * Licensed to jclouds, Inc. (jclouds) under one or more
    * contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  jclouds 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.jclouds.predicates;
  
  import java.io.IOException;
  import java.net.InetSocketAddress;
  import java.net.Socket;
  
  import javax.annotation.Resource;
  import javax.inject.Named;
  import javax.inject.Singleton;
  
  import org.jclouds.logging.Logger;
  import org.jclouds.net.IPSocket;
  
  import com.google.inject.Inject;
  
  /**
   * 
   * Tests to see if a socket is open.
   * 
   * @author Adrian Cole
   */
  @Singleton
  public class InetSocketAddressConnect implements SocketOpen {
  
     @Resource
     protected Logger logger = Logger.NULL;
  
     @Inject(optional = true)
     @Named("org.jclouds.socket_timeout")
     private int timeout = 2000;
  
     @Override
     public boolean apply(IPSocket socketA) {
        InetSocketAddress socketAddress = new InetSocketAddress(socketA.getAddress(), socketA
                 .getPort());
        Socket socket = null;
        try {
           logger.trace("testing socket %s", socketAddress);
           socket = new Socket();
           socket.setReuseAddress(false);
           socket.setSoLinger(false, 1);
           socket.setSoTimeout(timeout);
           socket.connect(socketAddress, timeout);
        } catch (IOException e) {
           return false;
        } finally {
           if (socket != null) {
              try {
                 socket.close();
              } catch (IOException ioe) {
                 // no work to do
              }
           }
        }
        return true;
     }
  
  }