protected void invokeVariableListeners(boolean includeCustomerListeners) {
Queue<VariableEvent> variableEventsQueue = getVariableEventQueue();
while (!variableEventsQueue.isEmpty()) {
// do not remove the event yet, as otherwise new events will immediately be dispatched
VariableEvent nextEvent = variableEventsQueue.peek();
CmmnExecution sourceExecution = (CmmnExecution) nextEvent.getSourceScope();
DelegateCaseVariableInstanceImpl delegateVariable =
DelegateCaseVariableInstanceImpl.fromVariableInstance(nextEvent.getVariableInstance());
delegateVariable.setEventName(nextEvent.getEventName());
delegateVariable.setSourceExecution(sourceExecution);
Map<String, List<VariableListener<?>>> listenersByActivity =
sourceExecution
.getActivity()
.getVariableListeners(delegateVariable.getEventName(), includeCustomerListeners);
CmmnExecution currentExecution = sourceExecution;
while (currentExecution != null) {
if (currentExecution.getActivityId() != null) {
List<VariableListener<?>> listeners =
listenersByActivity.get(currentExecution.getActivityId());
if (listeners != null) {
delegateVariable.setScopeExecution(currentExecution);
for (VariableListener<?> listener : listeners) {
try {
CaseVariableListener caseVariableListener = (CaseVariableListener) listener;
CaseVariableListenerInvocation invocation =
new CaseVariableListenerInvocation(
caseVariableListener, delegateVariable, currentExecution);
Context.getProcessEngineConfiguration()
.getDelegateInterceptor()
.handleInvocation(invocation);
} catch (Exception e) {
throw LOG.invokeVariableListenerException(e);
}
}
}
}
currentExecution = currentExecution.getParent();
}
// finally remove the event from the queue
variableEventsQueue.remove();
}
}
// variable listeners
public void dispatchEvent(VariableEvent variableEvent) {
boolean invokeCustomListeners =
Context.getProcessEngineConfiguration().isInvokeCustomVariableListeners();
Map<String, List<VariableListener<?>>> listeners =
getActivity().getVariableListeners(variableEvent.getEventName(), invokeCustomListeners);
// only attempt to invoke listeners if there are any (as this involves resolving the upwards
// execution hierarchy)
if (!listeners.isEmpty()) {
getCaseInstance().queueVariableEvent(variableEvent, invokeCustomListeners);
}
}
public boolean shouldEvaluateForVariableEvent(VariableEvent event) {
return ((variableName == null || event.getVariableInstance().getName().equals(variableName))
&& ((variableEvents == null || variableEvents.isEmpty())
|| variableEvents.contains(event.getEventName())));
}
