/***********************************************************************************************************************
* 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);
}