Package io.camunda.zeebe.engine.processing.bpmn

Class ProcessInstanceStateTransitionGuard

java.lang.Object

io.camunda.zeebe.engine.processing.bpmn.ProcessInstanceStateTransitionGuard

public final class ProcessInstanceStateTransitionGuard
extends Object

Checks the preconditions of a state transition command.

A process instance can be have concurrent state transitions if a user command is received (e.g. cancel process instance) or if an internal/external event is triggered (e.g. timer boundary event). In this case, the current process instance processing needs to be interrupted be avoid an inconsistent state.

Constructor Summary

Constructors

Constructor	Description
ProcessInstanceStateTransitionGuard(BpmnStateBehavior stateBehavior)

Method Summary

Modifier and Type	Method	Description
boolean	doesPathExist(ExecutableProcess process, org.agrona.DirectBuffer sourceElementId, org.agrona.DirectBuffer targetElementId, Set<org.agrona.DirectBuffer> visited)
Set<org.agrona.DirectBuffer>	findActivateElementInFlowScope(BpmnElementContext context, ExecutableFlowElement executableFlowElement)
Either<Failure,?>	isValidStateTransition(BpmnElementContext context, ExecutableFlowElement element)	Checks if the preconditions of the given command are met.

Methods inherited from class java.lang.Object

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

Constructor Details

ProcessInstanceStateTransitionGuard

public ProcessInstanceStateTransitionGuard(BpmnStateBehavior stateBehavior)

Method Details

isValidStateTransition

public Either<Failure,?> isValidStateTransition(BpmnElementContext context,
 ExecutableFlowElement element)

Checks if the preconditions of the given command are met.

Returns:

true if the preconditions are met and the transition command is valid.

findActivateElementInFlowScope

public Set<org.agrona.DirectBuffer> findActivateElementInFlowScope(BpmnElementContext context,
 ExecutableFlowElement executableFlowElement)

doesPathExist

public boolean doesPathExist(ExecutableProcess process,
 org.agrona.DirectBuffer sourceElementId,
 org.agrona.DirectBuffer targetElementId,
 Set<org.agrona.DirectBuffer> visited)