/*********************************************************************************************************************** * 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.executiongraph; /** * This interface allows objects to receive notifications * when the status of an observed job has changed. * */ public interface JobStatusListener { /** * Called when the status of the job with the given {@li * * @param executionGraph * the executionGraph representing the job the event belongs to * @param newJobStatus * the new job status * @param optionalMessage * an optional message (possibly <code>null</code>) that can be attached to the state change */ void jobStatusHasChanged(ExecutionGraph executionGraph, InternalJobStatus newJobStatus, String optionalMessage); }