/*********************************************************************************************************************** * 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.cluster; import java.util.List; import eu.stratosphere.nephele.instance.AllocatedResource; import eu.stratosphere.nephele.instance.InstanceListener; import eu.stratosphere.nephele.jobgraph.JobID; /** * This class is an auxiliary class to send the notification * about the availability of an {@link AbstractInstance} to the given {@link InstanceListener} object. The notification * must be sent from * a separate thread, otherwise the atomic operation of requesting an instance * for a vertex and switching to the state ASSINING could not be guaranteed. * This class is thread-safe. * */ public class ClusterInstanceNotifier extends Thread { /** * The {@link InstanceListener} object to send the notification to. */ private final InstanceListener instanceListener; /** * The ID of the job the notification refers to. */ private final JobID jobID; /** * The allocated resources the notification refers to. */ private final List<AllocatedResource> allocatedResources; /** * Constructs a new instance notifier object. * * @param instanceListener * the listener to send the notification to * @param jobID * the ID of the job the notification refers to * @param allocatedResources * the resources with has been allocated for the job */ public ClusterInstanceNotifier(final InstanceListener instanceListener, final JobID jobID, final List<AllocatedResource> allocatedResources) { this.instanceListener = instanceListener; this.jobID = jobID; this.allocatedResources = allocatedResources; } @Override public void run() { this.instanceListener.resourcesAllocated(this.jobID, this.allocatedResources); } }