/**
    * 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.aws.ec2.compute.strategy;
  
  import static com.google.common.base.Preconditions.checkNotNull;
  import static com.google.common.collect.Iterables.getOnlyElement;
  
  import java.util.Map;
  import java.util.NoSuchElementException;
  
  import javax.inject.Inject;
  import javax.inject.Singleton;
  
  import org.jclouds.aws.ec2.AWSEC2Client;
  import org.jclouds.compute.strategy.GetNodeMetadataStrategy;
  import org.jclouds.domain.Credentials;
  import org.jclouds.ec2.compute.strategy.EC2DestroyNodeStrategy;
  
  import com.google.common.collect.Iterables;
  
  /**
   * 
   * @author Adrian Cole
   */
  @Singleton
  public class AWSEC2DestroyNodeStrategy extends EC2DestroyNodeStrategy {
  
     protected final AWSEC2Client client;
     protected final Map<String, Credentials> credentialStore;
  
     @Inject
     protected AWSEC2DestroyNodeStrategy(AWSEC2Client client, GetNodeMetadataStrategy getNode,
              Map<String, Credentials> credentialStore) {
        super(client, getNode);
        this.client = checkNotNull(client, "client");
        this.credentialStore = checkNotNull(credentialStore, "credentialStore");
     }
  
     @Override
     protected void destroyInstanceInRegion(String region, String id) {
        String spotId = id;
        if (id.indexOf("sir-") != 0) {
           try {
              spotId = getOnlyElement(
                       Iterables.concat(client.getInstanceServices().describeInstancesInRegion(region, id)))
                       .getSpotInstanceRequestId();
              credentialStore.remove("node#" + region + "/" + spotId);
           } catch (NoSuchElementException e) {
           }
           super.destroyInstanceInRegion(region, id);
        } else {
           client.getSpotInstanceServices().cancelSpotInstanceRequestsInRegion(region, spotId);
           credentialStore.remove("node#" + region + "/" + id);
        }
  
     }
  }