public override void OnEvent(IActivitiEvent @event)
{
if (IsValidEvent(@event))
{
if (@event.ProcessInstanceId is null && processInstanceScope)
{
throw new ActivitiIllegalArgumentException("Cannot throw process-instance scoped signal, since the dispatched event is not part of an ongoing process instance");
}
ICommandContext commandContext = Context.CommandContext;
IEventSubscriptionEntityManager eventSubscriptionEntityManager = commandContext.EventSubscriptionEntityManager;
IList <ISignalEventSubscriptionEntity> subscriptionEntities;
if (processInstanceScope)
{
subscriptionEntities = eventSubscriptionEntityManager.FindSignalEventSubscriptionsByProcessInstanceAndEventName(@event.ProcessInstanceId, signalName);
}
else
{
string tenantId = null;
if (!(@event.ProcessDefinitionId is null))
{
IProcessDefinition processDefinition = commandContext.ProcessEngineConfiguration.DeploymentManager.FindDeployedProcessDefinitionById(@event.ProcessDefinitionId);
tenantId = processDefinition.TenantId;
}
subscriptionEntities = eventSubscriptionEntityManager.FindSignalEventSubscriptionsByEventName(signalName, tenantId);
}
foreach (ISignalEventSubscriptionEntity signalEventSubscriptionEntity in subscriptionEntities)
{
eventSubscriptionEntityManager.EventReceived(signalEventSubscriptionEntity, null, false);
}
}
}
public override void Execute(IExecutionEntity execution)
{
ICommandContext commandContext = Context.CommandContext;
string eventSubscriptionName;
if (signalEventName is object)
{
eventSubscriptionName = signalEventName;
}
else
{
IExpression expressionObject = commandContext.ProcessEngineConfiguration.ExpressionManager.CreateExpression(signalExpression);
eventSubscriptionName = expressionObject.GetValue(execution).ToString();
}
IEventSubscriptionEntityManager eventSubscriptionEntityManager = commandContext.EventSubscriptionEntityManager;
IList <ISignalEventSubscriptionEntity> subscriptionEntities;
if (processInstanceScope)
{
subscriptionEntities = eventSubscriptionEntityManager.FindSignalEventSubscriptionsByProcessInstanceAndEventName(execution.ProcessInstanceId, eventSubscriptionName);
}
else
{
subscriptionEntities = eventSubscriptionEntityManager.FindSignalEventSubscriptionsByEventName(eventSubscriptionName, execution.TenantId);
}
foreach (ISignalEventSubscriptionEntity signalEventSubscriptionEntity in subscriptionEntities)
{
Context.ProcessEngineConfiguration.EventDispatcher.DispatchEvent(ActivitiEventBuilder.CreateSignalEvent(ActivitiEventType.ACTIVITY_SIGNALED, signalEventSubscriptionEntity.ActivityId, eventSubscriptionName, null, signalEventSubscriptionEntity.ExecutionId, signalEventSubscriptionEntity.ProcessInstanceId, signalEventSubscriptionEntity.ProcessDefinitionId));
eventSubscriptionEntityManager.EventReceived(signalEventSubscriptionEntity, null, signalEventDefinition.Async);
}
Context.Agenda.PlanTakeOutgoingSequenceFlowsOperation(execution, true);
}
public virtual object Execute(ICommandContext commandContext)
{
IEventSubscriptionEntityManager eventSubscriptionEntityManager = commandContext.EventSubscriptionEntityManager;
IList <ISignalEventSubscriptionEntity> signalEvents;
if (executionId is null)
{
signalEvents = eventSubscriptionEntityManager.FindSignalEventSubscriptionsByEventName(eventName, tenantId);
}
else
{
IExecutionEntity execution = commandContext.ExecutionEntityManager.FindById <IExecutionEntity>(executionId);
if (execution == null)
{
throw new ActivitiObjectNotFoundException("Cannot find execution with id '" + executionId + "'", typeof(IExecution));
}
if (execution.Suspended)
{
throw new ActivitiException("Cannot throw signal event '" + eventName + "' because execution '" + executionId + "' is suspended");
}
if (execution.ProcessInstanceType)
{
string processInstanceId = execution.ProcessInstanceId;
IExecutionEntity superExection = execution.SuperExecution;
while (superExection is object)
{
processInstanceId = superExection.ProcessInstanceId;
superExection = superExection.SuperExecution;
}
signalEvents = eventSubscriptionEntityManager.FindSignalEventSubscriptionsByProcessInstanceAndEventName(processInstanceId, eventName);
}
else
{
signalEvents = eventSubscriptionEntityManager.FindSignalEventSubscriptionsByNameAndExecution(eventName, executionId);
}
if (signalEvents.Count == 0)
{
throw new ActivitiException("Execution '" + executionId + "' has not subscribed to a signal event with name '" + eventName + "'.");
}
}
foreach (ISignalEventSubscriptionEntity signalEventSubscriptionEntity in signalEvents)
{
// 信号事件是多播，消息事件是单播，所以这里应当只需要GlobalScoped，后增加的
// execionId也可以讲信号事件用于单播.
// We only throw the event to globally scoped signals.
// Process instance scoped signals must be thrown within the process itself
if (string.IsNullOrWhiteSpace(executionId) == false || signalEventSubscriptionEntity.GlobalScoped)
{
Context.ProcessEngineConfiguration.EventDispatcher.DispatchEvent(ActivitiEventBuilder.CreateSignalEvent(ActivitiEventType.ACTIVITY_SIGNALED, signalEventSubscriptionEntity.ActivityId, eventName, payload, signalEventSubscriptionEntity.ExecutionId, signalEventSubscriptionEntity.ProcessInstanceId, signalEventSubscriptionEntity.ProcessDefinitionId));
eventSubscriptionEntityManager.EventReceived(signalEventSubscriptionEntity, payload, async);
}
}
return(null);
}