/// <summary>
///
/// </summary>
/// <param name="executionEntityManager"></param>
/// <param name="parentExecution"></param>
/// <param name="subProcess"></param>
/// <returns></returns>
protected internal virtual IExecutionEntity HandleSubProcessEnd(IExecutionEntityManager executionEntityManager, IExecutionEntity parentExecution, SubProcess subProcess)
{
// create a new execution to take the outgoing sequence flows
IExecutionEntity executionToContinue = executionEntityManager.CreateChildExecution(parentExecution.Parent);
executionToContinue.CurrentFlowElement = subProcess;
bool hasCompensation = false;
if (subProcess is Transaction)
{
hasCompensation = true;
}
else
{
foreach (FlowElement subElement in subProcess.FlowElements)
{
if (subElement is Activity subActivity)
{
if (CollectionUtil.IsNotEmpty(subActivity.BoundaryEvents))
{
foreach (BoundaryEvent boundaryEvent in subActivity.BoundaryEvents)
{
if (CollectionUtil.IsNotEmpty(boundaryEvent.EventDefinitions) && boundaryEvent.EventDefinitions[0] is CompensateEventDefinition)
{
hasCompensation = true;
break;
}
}
}
}
}
}
// All executions will be cleaned up afterwards. However, for compensation we need
// a copy of these executions so we can use them later on when the compensation is thrown.
// The following method does exactly that, and moves the executions beneath the process instance.
if (hasCompensation)
{
ScopeUtil.CreateCopyOfSubProcessExecutionForCompensation(parentExecution);
}
executionEntityManager.DeleteChildExecutions(parentExecution, null, false);
executionEntityManager.DeleteExecutionAndRelatedData(parentExecution, null, false);
Context.ProcessEngineConfiguration.EventDispatcher.DispatchEvent(ActivitiEventBuilder.CreateActivityEvent(ActivitiEventType.ACTIVITY_COMPLETED, subProcess.Id, subProcess.Name, parentExecution.Id, parentExecution.ProcessInstanceId, parentExecution.ProcessDefinitionId, subProcess));
return(executionToContinue);
}
/// <summary>
///
/// </summary>
/// <param name="flowNode"></param>
protected internal virtual void ExecuteSynchronous(FlowNode flowNode)
{
// Execution listener
if (CollectionUtil.IsNotEmpty(flowNode.ExecutionListeners))
{
ExecuteExecutionListeners(flowNode, BaseExecutionListenerFields.EVENTNAME_START);
}
commandContext.HistoryManager.RecordActivityStart(execution);
// Execute actual behavior
IActivityBehavior activityBehavior = (IActivityBehavior)flowNode.Behavior;
if (activityBehavior != null)
{
logger.LogDebug($"Executing activityBehavior {activityBehavior.GetType()} on activity '{flowNode.Id}' with execution {execution.Id}");
ProcessEngineConfigurationImpl processEngineConfiguration = Context.ProcessEngineConfiguration;
if (processEngineConfiguration != null && processEngineConfiguration.EventDispatcher.Enabled)
{
processEngineConfiguration.EventDispatcher.DispatchEvent(ActivitiEventBuilder.CreateActivityEvent(ActivitiEventType.ACTIVITY_STARTED, flowNode.Id, flowNode.Name, execution.Id, execution.ProcessInstanceId, execution.ProcessDefinitionId, flowNode));
}
try
{
activityBehavior.Execute(execution);
}
catch (BpmnError error)
{
// re-throw business fault so that it can be caught by an Error Intermediate Event or Error Event Sub-Process in the process
ErrorPropagation.PropagateError(error, execution);
}
catch (Exception e)
{
if (LogMDC.MDCEnabled)
{
LogMDC.PutMDCExecution(execution);
}
throw e;
}
}
else
{
logger.LogDebug($"No activityBehavior on activity '{flowNode.Id}' with execution {execution.Id}");
}
}
/// <summary>
///
/// </summary>
/// <param name="flowNode"></param>
protected internal virtual void HandleActivityEnd(FlowNode flowNode)
{
// a process instance execution can never leave a flow node, but it can pass here whilst cleaning up
// hence the check for NOT being a process instance
if (!execution.ProcessInstanceType)
{
if (CollectionUtil.IsNotEmpty(flowNode.ExecutionListeners))
{
ExecuteExecutionListeners(flowNode, BaseExecutionListenerFields.EVENTNAME_END);
}
commandContext.HistoryManager.RecordActivityEnd(execution, null);
if (!(execution.CurrentFlowElement is SubProcess))
{
Context.ProcessEngineConfiguration.EventDispatcher.DispatchEvent(ActivitiEventBuilder.CreateActivityEvent(ActivitiEventType.ACTIVITY_COMPLETED, flowNode.Id, flowNode.Name, execution.Id, execution.ProcessInstanceId, execution.ProcessDefinitionId, flowNode));
}
}
}
/// <summary>
///
/// </summary>
/// <param name="activityBehavior"></param>
/// <param name="flowNode"></param>
protected internal virtual void ExecuteActivityBehavior(IActivityBehavior activityBehavior, FlowNode flowNode)
{
log.LogDebug($"Executing activityBehavior {activityBehavior.GetType()} on activity '{flowNode.Id}' with execution {execution.Id}");
ProcessEngineConfigurationImpl processEngineConfiguration = Context.ProcessEngineConfiguration;
if (processEngineConfiguration != null && processEngineConfiguration.EventDispatcher.Enabled)
{
processEngineConfiguration.EventDispatcher.DispatchEvent(ActivitiEventBuilder.CreateActivityEvent(ActivitiEventType.ACTIVITY_STARTED, flowNode.Id, flowNode.Name, execution.Id, execution.ProcessInstanceId, execution.ProcessDefinitionId, flowNode));
}
try
{
activityBehavior.Execute(execution);
}
catch (Exception e)
{
throw new Exception($"{e.Message}", e);
}
}
public virtual void HandleEvent(IEventSubscriptionEntity eventSubscription, object payload, ICommandContext commandContext)
{
string configuration = eventSubscription.Configuration;
if (configuration is null)
{
throw new ActivitiException("Compensating execution not set for compensate event subscription with id " + eventSubscription.Id);
}
IExecutionEntity compensatingExecution = commandContext.ExecutionEntityManager.FindById <IExecutionEntity>(configuration);
string processDefinitionId = compensatingExecution.ProcessDefinitionId;
Process process = ProcessDefinitionUtil.GetProcess(processDefinitionId);
if (process == null)
{
throw new ActivitiException("Cannot start process instance. Process model (id = " + processDefinitionId + ") could not be found");
}
FlowElement flowElement = process.GetFlowElement(eventSubscription.ActivityId, true);
if (flowElement is SubProcess && !((SubProcess)flowElement).ForCompensation)
{
// descend into scope:
compensatingExecution.IsScope = true;
IList <ICompensateEventSubscriptionEntity> eventsForThisScope = commandContext.EventSubscriptionEntityManager.FindCompensateEventSubscriptionsByExecutionId(compensatingExecution.Id);
ScopeUtil.ThrowCompensationEvent(eventsForThisScope, compensatingExecution, false);
}
else
{
try
{
if (commandContext.ProcessEngineConfiguration.EventDispatcher.Enabled)
{
commandContext.ProcessEngineConfiguration.EventDispatcher.DispatchEvent(ActivitiEventBuilder.CreateActivityEvent(ActivitiEventType.ACTIVITY_COMPENSATE, flowElement.Id, flowElement.Name, compensatingExecution.Id, compensatingExecution.ProcessInstanceId, compensatingExecution.ProcessDefinitionId, flowElement));
}
compensatingExecution.CurrentFlowElement = flowElement;
Context.Agenda.PlanContinueProcessInCompensation(compensatingExecution);
}
catch (Exception e)
{
throw new ActivitiException("Error while handling compensation event " + eventSubscription, e);
}
}
}
// private static Logger log = LoggerFactory.getLogger(typeof(ExclusiveGatewayActivityBehavior));
/// <summary>
/// The default behaviour of BPMN, taking every outgoing sequence flow (where the condition evaluates to true), is not valid for an exclusive gateway.
///
/// Hence, this behaviour is overridden and replaced by the correct behavior: selecting the first sequence flow which condition evaluates to true (or which hasn't got a condition) and leaving the
/// activity through that sequence flow.
///
/// If no sequence flow is selected (ie all conditions evaluate to false), then the default sequence flow is taken (if defined).
/// </summary>
public override void Leave(IExecutionEntity execution)
{
if (log.IsEnabled(LogLevel.Debug))
{
log.LogDebug($"Leaving exclusive gateway '{execution.CurrentActivityId}'");
}
ExclusiveGateway exclusiveGateway = (ExclusiveGateway)execution.CurrentFlowElement;
ProcessEngineConfigurationImpl processEngineConfiguration = Context.ProcessEngineConfiguration;
if (processEngineConfiguration is object && processEngineConfiguration.EventDispatcher.Enabled)
{
processEngineConfiguration.EventDispatcher.DispatchEvent(ActivitiEventBuilder.CreateActivityEvent(ActivitiEventType.ACTIVITY_COMPLETED, exclusiveGateway.Id, exclusiveGateway.Name, execution.Id, execution.ProcessInstanceId, execution.ProcessDefinitionId, exclusiveGateway));
}
SequenceFlow outgoingSequenceFlow = null;
SequenceFlow defaultSequenceFlow = null;
string defaultSequenceFlowId = exclusiveGateway.DefaultFlow;
// Determine sequence flow to take
foreach (SequenceFlow sequenceFlow in exclusiveGateway.OutgoingFlows)
{
string skipExpressionString = sequenceFlow.SkipExpression;
if (!SkipExpressionUtil.IsSkipExpressionEnabled(execution, skipExpressionString))
{
bool conditionEvaluatesToTrue = ConditionUtil.HasTrueCondition(sequenceFlow, execution);
if (conditionEvaluatesToTrue && (defaultSequenceFlowId is null || !defaultSequenceFlowId.Equals(sequenceFlow.Id)))
{
if (log.IsEnabled(LogLevel.Debug))
{
log.LogDebug($"Sequence flow '{sequenceFlow.Id}'selected as outgoing sequence flow.");
}
outgoingSequenceFlow = sequenceFlow;
break;
}
}
else if (SkipExpressionUtil.ShouldSkipFlowElement(Context.CommandContext, execution, skipExpressionString))
{
outgoingSequenceFlow = sequenceFlow;
break;
}
// Already store it, if we would need it later. Saves one for loop.
if (defaultSequenceFlowId is object && defaultSequenceFlowId.Equals(sequenceFlow.Id))
{
defaultSequenceFlow = sequenceFlow;
}
}
// We have to record the end here, or else we're already past it
Context.CommandContext.HistoryManager.RecordActivityEnd(execution, null);
// Leave the gateway
if (outgoingSequenceFlow != null)
{
execution.CurrentFlowElement = outgoingSequenceFlow;
log.LogInformation($"条件表达式:id={outgoingSequenceFlow.Id} expression={outgoingSequenceFlow.ConditionExpression}");
}
else
{
if (defaultSequenceFlow != null)
{
execution.CurrentFlowElement = defaultSequenceFlow;
log.LogInformation($"条件表达式:id={defaultSequenceFlow.Id} expression={defaultSequenceFlow.ConditionExpression}");
}
else
{
// No sequence flow could be found, not even a default one
throw new ActivitiException("No outgoing sequence flow of the exclusive gateway '" + exclusiveGateway.Id + "' could be selected for continuing the process");
}
}
base.Leave(execution);
}