org.apache.flink.runtime.scheduler.strategy.SchedulingStrategy Maven / Gradle / Ivy
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*
* http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.flink.runtime.scheduler.strategy;
import org.apache.flink.runtime.execution.ExecutionState;
import org.apache.flink.runtime.executiongraph.Execution;
import org.apache.flink.runtime.executiongraph.IntermediateResultPartition;
import org.apache.flink.runtime.io.network.partition.ResultPartitionID;
import java.util.Set;
/**
* Component which encapsulates the scheduling logic.
* It can react to execution state changes and partition consumable events.
* Moreover, it is responsible for resolving task failures.
*/
public interface SchedulingStrategy {
/**
* Called when the scheduling is started (initial scheduling operation).
*/
void startScheduling();
/**
* Called whenever vertices need to be restarted (due to task failure).
*
* @param verticesToRestart The tasks need to be restarted
*/
void restartTasks(Set verticesToRestart);
/**
* Called whenever an {@link Execution} changes its state.
*
* @param executionVertexId The id of the task
* @param executionState The new state of the execution
*/
void onExecutionStateChange(ExecutionVertexID executionVertexId, ExecutionState executionState);
/**
* Called whenever an {@link IntermediateResultPartition} becomes consumable.
*
* @param executionVertexId The id of the producer
* @param resultPartitionId The id of the result partition
*/
void onPartitionConsumable(ExecutionVertexID executionVertexId, ResultPartitionID resultPartitionId);
}