/*******************************************************************************
 *Copyright (c) 2009 Eucalyptus Systems, Inc.
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, only version 3 of the License.
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 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
 * for more details.
 * 
 * You should have received a copy of the GNU General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 * 
 * Please contact Eucalyptus Systems, Inc., 130 Castilian
 * Dr., Goleta, CA 93101 USA or visit <http://www.eucalyptus.com/licenses/>
 * if you need additional information or have any questions.
 * 
 * This file may incorporate work covered under the following copyright and
 * permission notice:
 * 
 * Software License Agreement (BSD License)
 * 
 * Copyright (c) 2008, Regents of the University of California
 * All rights reserved.
 * 
 * Redistribution and use of this software in source and binary forms, with
 * or without modification, are permitted provided that the following
 * conditions are met:
 * 
 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 * 
 * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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 * THIS SOFTWARE ACKNOWLEDGE THE POSSIBLE PRESENCE OF OTHER OPEN SOURCE
 * LICENSED MATERIAL, COPYRIGHTED MATERIAL OR PATENTED MATERIAL IN THIS
 * SOFTWARE, AND IF ANY SUCH MATERIAL IS DISCOVERED THE PARTY DISCOVERING
 * IT MAY INFORM DR. RICH WOLSKI AT THE UNIVERSITY OF CALIFORNIA, SANTA
 * BARBARA WHO WILL THEN ASCERTAIN THE MOST APPROPRIATE REMEDY, WHICH IN
 * THE REGENTS’ DISCRETION MAY INCLUDE, WITHOUT LIMITATION, REPLACEMENT
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 *******************************************************************************/
/*
 * Author: chris grzegorczyk <grze@eucalyptus.com>
 */
package com.eucalyptus.cluster.callback;

import org.apache.log4j.Logger;
import com.eucalyptus.cluster.Cluster;
import com.eucalyptus.cluster.Clusters;
import com.eucalyptus.cluster.Networks;
import com.eucalyptus.util.EucalyptusClusterException;
import com.eucalyptus.util.LogUtil;
import edu.ucsb.eucalyptus.cloud.Network;
import edu.ucsb.eucalyptus.cloud.NetworkToken;
import edu.ucsb.eucalyptus.msgs.StopNetworkResponseType;
import edu.ucsb.eucalyptus.msgs.StopNetworkType;

public class StopNetworkCallback extends BroadcastCallback<StopNetworkType,StopNetworkResponseType> {
  private static Logger LOG = Logger.getLogger( StopNetworkCallback.class );
  private NetworkToken  token;

  public StopNetworkCallback( final NetworkToken networkToken ) {
    this.token = networkToken;
    StopNetworkType msg = new StopNetworkType( token.getUserName(), token.getNetworkName(), token.getVlan() ).regarding( );
    msg.setUserId( token.getUserName() );
    this.setRequest( msg );
  }

  @Override
  public void verify( StopNetworkResponseType msg ) throws Exception {}

  @Override
  public void prepare( StopNetworkType msg ) throws Exception {
    try {
      Network net = Networks.getInstance( ).lookup( token.getName( ) );
      Cluster cluster = Clusters.getInstance( ).lookup( token.getCluster( ) );
      LOG.debug( "Releasing network token back to cluster: " + token );
      if( net.hasTokens( ) ) throw new EucalyptusClusterException( "Returning stop network event since it still exists." );
      cluster.getState( ).releaseNetworkAllocation( token );
    } catch ( EucalyptusClusterException e ) {
      LOG.debug( "Aborting stop network for network with live instances: " + e.getMessage( ), e );
      throw e;
    } catch ( Exception e ) {
      LOG.debug( e );
    }
  }

  @Override
  public BroadcastCallback<StopNetworkType,StopNetworkResponseType> newInstance( ) {
    return new StopNetworkCallback( token );
  }

  @Override
  public void fail( Throwable e ) {
    LOG.debug( LogUtil.subheader( this.getRequest( ).toString( "eucalyptus_ucsb_edu" ) ) );
    LOG.debug( e, e );
  }

}