org.apache.flink.runtime.executiongraph.failover.flip1.FailoverStrategy Maven / Gradle / Ivy
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* 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.executiongraph.failover.flip1;
import org.apache.flink.runtime.scheduler.strategy.ExecutionVertexID;
import java.util.Set;
/**
* New interface for failover strategies.
*/
public interface FailoverStrategy {
/**
* Returns a set of IDs corresponding to the set of vertices that should be restarted.
*
* @param executionVertexId ID of the failed task
* @param cause cause of the failure
* @return set of IDs of vertices to restart
*/
Set getTasksNeedingRestart(ExecutionVertexID executionVertexId, Throwable cause);
// ------------------------------------------------------------------------
// factory
// ------------------------------------------------------------------------
/**
* The factory to instantiate {@link FailoverStrategy}.
*/
interface Factory {
/**
* Instantiates the {@link FailoverStrategy}.
*
* @param topology of the graph to failover
* @param resultPartitionAvailabilityChecker to check whether a result partition is available
* @return The instantiated failover strategy.
*/
FailoverStrategy create(
FailoverTopology topology,
ResultPartitionAvailabilityChecker resultPartitionAvailabilityChecker);
}
}