protected internal virtual void DeleteOtherEventsRelatedToEventBasedGateway(IExecutionEntity execution, EventGateway eventGateway)
{
// To clean up the other events behind the event based gateway, we must gather the
// activity ids of said events and check the _sibling_ executions of the incoming execution.
// Note that it can happen that there are multiple such execution in those activity ids,
// (for example a parallel gw going twice to the event based gateway, kinda silly, but valid)
// so we only take _one_ result of such a query for deletion.
// Gather all activity ids for the events after the event based gateway that need to be destroyed
IList <SequenceFlow> outgoingSequenceFlows = eventGateway.OutgoingFlows;
ISet <string> eventActivityIds = new HashSet <string>();//outgoingSequenceFlows.Count - 1); // -1, the event being triggered does not need to be deleted
foreach (SequenceFlow outgoingSequenceFlow in outgoingSequenceFlows)
{
if (outgoingSequenceFlow.TargetFlowElement != null && !outgoingSequenceFlow.TargetFlowElement.Id.Equals(execution.CurrentActivityId))
{
eventActivityIds.Add(outgoingSequenceFlow.TargetFlowElement.Id);
}
}
ICommandContext commandContext = Context.CommandContext;
IExecutionEntityManager executionEntityManager = commandContext.ExecutionEntityManager;
// Find the executions
IList <IExecutionEntity> executionEntities = executionEntityManager.FindExecutionsByParentExecutionAndActivityIds(execution.ParentId, eventActivityIds);
// Execute the cancel behaviour of the IntermediateCatchEvent
foreach (IExecutionEntity executionEntity in executionEntities)
{
if (eventActivityIds.Contains(executionEntity.ActivityId) && execution.CurrentFlowElement is IntermediateCatchEvent)
{
IntermediateCatchEvent intermediateCatchEvent = (IntermediateCatchEvent)execution.CurrentFlowElement;
if (intermediateCatchEvent.Behavior is IntermediateCatchEventActivityBehavior)
{
((IntermediateCatchEventActivityBehavior)intermediateCatchEvent.Behavior).EventCancelledByEventGateway(executionEntity);
eventActivityIds.Remove(executionEntity.ActivityId); // We only need to delete ONE execution at the event.
}
}
}
}
public override void Execute(IExecutionEntity execution)
{
ICommandContext commandContext = Context.CommandContext;
IExecutionEntityManager executionEntityManager = commandContext.ExecutionEntityManager;
// find cancel boundary event:
IExecutionEntity parentScopeExecution = null;
IExecutionEntity currentlyExaminedExecution = executionEntityManager.FindById <IExecutionEntity>(execution.ParentId);
while (currentlyExaminedExecution != null && parentScopeExecution == null)
{
if (currentlyExaminedExecution.CurrentFlowElement is SubProcess)
{
parentScopeExecution = currentlyExaminedExecution;
SubProcess subProcess = (SubProcess)currentlyExaminedExecution.CurrentFlowElement;
if (subProcess.LoopCharacteristics != null)
{
IExecutionEntity miExecution = parentScopeExecution.Parent;
FlowElement miElement = miExecution.CurrentFlowElement;
if (miElement != null && miElement.Id.Equals(subProcess.Id))
{
parentScopeExecution = miExecution;
}
}
}
else
{
currentlyExaminedExecution = executionEntityManager.FindById <IExecutionEntity>(currentlyExaminedExecution.ParentId);
}
}
if (parentScopeExecution == null)
{
throw new ActivitiException("No sub process execution found for cancel end event " + execution.CurrentActivityId);
}
{
SubProcess subProcess = (SubProcess)parentScopeExecution.CurrentFlowElement;
BoundaryEvent cancelBoundaryEvent = null;
if (CollectionUtil.IsNotEmpty(subProcess.BoundaryEvents))
{
foreach (BoundaryEvent boundaryEvent in subProcess.BoundaryEvents)
{
if (CollectionUtil.IsNotEmpty(boundaryEvent.EventDefinitions) && boundaryEvent.EventDefinitions[0] is CancelEventDefinition)
{
cancelBoundaryEvent = boundaryEvent;
break;
}
}
}
if (cancelBoundaryEvent == null)
{
throw new ActivitiException("Could not find cancel boundary event for cancel end event " + execution.CurrentActivityId);
}
IExecutionEntity newParentScopeExecution = null;
currentlyExaminedExecution = executionEntityManager.FindById <IExecutionEntity>(parentScopeExecution.ParentId);
while (currentlyExaminedExecution != null && newParentScopeExecution == null)
{
if (currentlyExaminedExecution.IsScope)
{
newParentScopeExecution = currentlyExaminedExecution;
}
else
{
currentlyExaminedExecution = executionEntityManager.FindById <IExecutionEntity>(currentlyExaminedExecution.ParentId);
}
}
ScopeUtil.CreateCopyOfSubProcessExecutionForCompensation(parentScopeExecution);
if (subProcess.LoopCharacteristics != null)
{
IList <IExecutionEntity> multiInstanceExecutions = parentScopeExecution.Executions;
IList <IExecutionEntity> executionsToDelete = new List <IExecutionEntity>();
foreach (IExecutionEntity multiInstanceExecution in multiInstanceExecutions)
{
if (!multiInstanceExecution.Id.Equals(parentScopeExecution.Id))
{
ScopeUtil.CreateCopyOfSubProcessExecutionForCompensation(multiInstanceExecution);
// end all executions in the scope of the transaction
executionsToDelete.Add(multiInstanceExecution);
DeleteChildExecutions(multiInstanceExecution, execution, commandContext, History.DeleteReasonFields.TRANSACTION_CANCELED);
}
}
foreach (IExecutionEntity executionEntityToDelete in executionsToDelete)
{
DeleteChildExecutions(executionEntityToDelete, execution, commandContext, History.DeleteReasonFields.TRANSACTION_CANCELED);
}
}
// The current activity is finished (and will not be ended in the deleteChildExecutions)
commandContext.HistoryManager.RecordActivityEnd(execution, null);
// TODO: 先删除已生成的边界取消执行实例
var cancelBoundaryEventExecution = executionEntityManager.FindExecutionsByParentExecutionAndActivityIds(parentScopeExecution.Id, new string[] { cancelBoundaryEvent.Id }).FirstOrDefault();
executionEntityManager.Delete(cancelBoundaryEventExecution);
// set new parent for boundary event execution
execution.Parent = newParentScopeExecution ?? throw new ActivitiException("Programmatic error: no parent scope execution found for boundary event " + cancelBoundaryEvent.Id);
execution.CurrentFlowElement = cancelBoundaryEvent;
// end all executions in the scope of the transaction
DeleteChildExecutions(parentScopeExecution, execution, commandContext, History.DeleteReasonFields.TRANSACTION_CANCELED);
commandContext.HistoryManager.RecordActivityEnd(parentScopeExecution, History.DeleteReasonFields.TRANSACTION_CANCELED);
Context.Agenda.PlanTriggerExecutionOperation(execution);
}
}
