org.apache.flink.runtime.execution.ExecutionObserver Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of flink-runtime_2.10 Show documentation

There is a newer version: 1.3.3

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.flink.runtime.execution;

public interface ExecutionObserver {

	/**
	 * Called when the execution state of the associated task has changed.
	 * 
	 * @param newExecutionState
	 *        the execution state the task has just switched to
	 * @param optionalMessage
	 *        an optional message providing further information on the state change
	 */
	void executionStateChanged(ExecutionState newExecutionState, String optionalMessage);

	/**
	 * Returns whether the task has been canceled.
	 * 
	 * @return true if the task has been canceled, false otherwise
	 */
	boolean isCanceled();
}