/**
* Copyright 2007-2008 University Of Southern California
*
* Licensed 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 edu.isi.pegasus.planner.partitioner;
import edu.isi.pegasus.planner.cluster.Clusterer;
import edu.isi.pegasus.planner.cluster.ClustererException;
import edu.isi.pegasus.planner.common.PegasusProperties;
import java.util.List;
/**
* A Callback implementation that passes the partitions detected during the
* partitioning of the worflow to a Clusterer for clustering. The clusterer
* is passed off to the callback during the callback initialization.
*
* @author Karan Vahi
* @version $Revision$
*/
public class ClustererCallback implements Callback {
/**
* The handle to the clusterer that does the clustering.
*/
private Clusterer mClusterer;
/**
* The handle to the properties object.
*/
private PegasusProperties mProps;
/**
* The default constructor.
*/
public ClustererCallback(){
}
/**
* Initializes the callback.
*
* @param properties the properties passed to the planner.
* @param clusterer the clusterer that has to be called out, in the callback
* methods.
*/
public void initialize (PegasusProperties properties, Clusterer clusterer){
mProps = properties;
mClusterer = clusterer;
}
/**
* Callback for when a partitioner determines that partition has been
* constructed. The partition is passed off to the clusterer that the
* callback has been initialized with.
*
* @param p the constructed partition.
*
* @throws RuntimeException in case of callback not being initialized, or
* a ClustererException being thrown during the Clusterer operation.
*/
public void cbPartition( Partition p ) {
//sanity check
if( mClusterer == null ){
throw new RuntimeException(
"Callback needs to be initialized before being used");
}
//shallow wrap of exception for time being
try{
mClusterer.determineClusters(p);
}
catch ( ClustererException e ){
throw new RuntimeException( "ClustererCallback cbPartition( Partition ) ",
e );
}
}
/**
* Callback for when a partitioner determines the relations between partitions
* that it has previously constructed.
*
* @param child the id of a partition.
* @param parents the list of <code>String</code> objects that contain
* the id's of the parents of the partition.
*
*
* @throws RuntimeException in case of callback not being initialized, or
* a ClustererException being thrown during the Clusterer operation.
*/
public void cbParents(String child, List parents) {
//sanity check
if( mClusterer == null ){
throw new RuntimeException(
"Callback needs to be initialized before being used");
}
//shallow wrap of exception for time being
try{
mClusterer.parents(child, parents);
}
catch ( ClustererException e ){
throw new RuntimeException( "ClustererCallback cbParents( String, List ) ",
e );
}
}
/**
* Callback for the partitioner to signal that it is done with the processing.
*
*
*/
public void cbDone(){
}
}