org.apache.flink.runtime.checkpoint

Class VertexFinishedStateChecker

java.lang.Object

org.apache.flink.runtime.checkpoint.VertexFinishedStateChecker

public class VertexFinishedStateChecker
extends Object

This class encapsulates the operation that checks if there are illegal modification to the JobGraph when restoring from a checkpoint with partially or fully finished operator states.

As a whole, it ensures

1. All the operators inside a JobVertex have the same finished state.
2. The predecessors of a fully finished vertex must also be fully finished.
3. The predecessors of a partially finished vertex
   • If connected via ALL_TO_ALL edge, the predecessor must be fully finished.
   • If connected via POINTWISE edge, the predecessor must be partially finished or fully finished.

Constructor Summary

Constructors

Constructor and Description
VertexFinishedStateChecker(Set<ExecutionJobVertex> vertices, Map<OperatorID,OperatorState> operatorStates)

Method Summary

Modifier and Type	Method and Description
void	validateOperatorsFinishedState()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

VertexFinishedStateChecker

public VertexFinishedStateChecker(Set<ExecutionJobVertex> vertices,
                                  Map<OperatorID,OperatorState> operatorStates)

Method Detail

validateOperatorsFinishedState

public void validateOperatorsFinishedState()