/***********************************************************************************************************************
* Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
*
* 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 eu.stratosphere.nephele.instance.local;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import eu.stratosphere.nephele.instance.AllocatedResource;
import eu.stratosphere.nephele.instance.InstanceListener;
import eu.stratosphere.nephele.jobgraph.JobID;
/**
* This class implements an instance listener that can be used for unit tests.
* <p>
* This class is thread-safe.
*
*/
public final class TestInstanceListener implements InstanceListener {
/**
* Stores the resources allocates
*/
final Map<JobID, List<AllocatedResource>> resourcesOfJobs = new HashMap<JobID, List<AllocatedResource>>();
@Override
public synchronized void resourcesAllocated(JobID jobID, List<AllocatedResource> allocatedResources) {
List<AllocatedResource> allocatedResourcesOfJob = this.resourcesOfJobs.get(jobID);
if (allocatedResourcesOfJob == null) {
allocatedResourcesOfJob = new ArrayList<AllocatedResource>();
this.resourcesOfJobs.put(jobID, allocatedResourcesOfJob);
}
for (final AllocatedResource allocatedResource : allocatedResources) {
if (allocatedResourcesOfJob.contains(allocatedResource)) {
throw new IllegalStateException("Resource " + allocatedResource.getAllocationID()
+ " is already allocated by job " + jobID);
}
allocatedResourcesOfJob.add(allocatedResource);
}
}
@Override
public synchronized void allocatedResourcesDied(JobID jobID, List<AllocatedResource> allocatedResources) {
final List<AllocatedResource> allocatedResourcesOfJob = this.resourcesOfJobs.get(jobID);
if (allocatedResourcesOfJob == null) {
throw new IllegalStateException("Unable to find allocated resources for job with ID " + jobID);
}
for (final AllocatedResource allocatedResource : allocatedResources) {
if (!allocatedResourcesOfJob.remove(allocatedResource)) {
throw new IllegalStateException("Resource " + allocatedResource.getAllocationID()
+ " is not assigned to job " + jobID);
}
}
if (allocatedResourcesOfJob.isEmpty()) {
this.resourcesOfJobs.remove(jobID);
}
}
/**
* Returns the number of allocated resources for the job with the given job ID.
*
* @param jobID
* the job ID specifying the job
* @return the number of allocated resources for the job
*/
public synchronized int getNumberOfAllocatedResourcesForJob(JobID jobID) {
final List<AllocatedResource> allocatedResources = this.resourcesOfJobs.get(jobID);
if (allocatedResources == null) {
return 0;
}
return allocatedResources.size();
}
/**
* Returns a list of resources allocated for the given job.
*
* @param jobID
* the job ID specifying the job
* @return the (possibly empty) list of resource allocated for the job
*/
public synchronized List<AllocatedResource> getAllocatedResourcesForJob(JobID jobID) {
final List<AllocatedResource> allocatedResources = this.resourcesOfJobs.get(jobID);
if (allocatedResources == null) {
return new ArrayList<AllocatedResource>();
}
return new ArrayList<AllocatedResource>(allocatedResources);
}
}