public <T> void publish(final SensorEvent<T> event) {
// REVIEW 1459 - execution
// delivery in parallel/background, using execution manager
// subscriptions, should define SingleThreadedScheduler for any subscriber ID tag
// in order to ensure callbacks are invoked in the order they are submitted
// (recommend exactly one per subscription to prevent deadlock)
// this is done with:
// em.setTaskSchedulerForTag(subscriberId, SingleThreadedScheduler.class);
// note, generating the notifications must be done in the calling thread to preserve order
// e.g. emit(A); emit(B); should cause onEvent(A); onEvent(B) in that order
if (LOG.isTraceEnabled()) LOG.trace("{} got a {} event", this, event);
totalEventsPublishedCount.incrementAndGet();
Set<Subscription> subs =
(Set<Subscription>)
((Set<?>) getSubscriptionsForEntitySensor(event.getSource(), event.getSensor()));
if (groovyTruth(subs)) {
if (LOG.isTraceEnabled())
LOG.trace(
"sending {}, {} to {}",
new Object[] {event.getSensor().getName(), event, join(subs, ",")});
for (Subscription s : subs) {
if (s.eventFilter != null && !s.eventFilter.apply(event)) continue;
final Subscription sAtClosureCreation = s;
em.submit(
mapOf("tag", s.subscriberExecutionManagerTag),
new Runnable() {
public void run() {
sAtClosureCreation.listener.onEvent(event);
}
});
totalEventsDeliveredCount.incrementAndGet();
}
}
}
private void assertHasEvent(
Sensor<?> sensor,
Predicate<Object> componentPredicate,
Predicate<? super CharSequence> descriptionPredicate) {
for (SensorEvent<FailureDescriptor> event : events) {
if (event.getSensor().equals(sensor)
&& (componentPredicate == null
|| componentPredicate.apply(event.getValue().getComponent()))
&& (descriptionPredicate == null
|| descriptionPredicate.apply(event.getValue().getDescription()))) {
return;
}
}
fail("No matching " + sensor + " event found; events=" + events);
}
@Override
public void onEvent(SensorEvent<Object> event) {
if (firstUpTime == null) {
if (event != null
&& Attributes.SERVICE_UP.equals(event.getSensor())
&& Boolean.TRUE.equals(event.getValue())) {
firstUpTime = event.getTimestamp();
} else if (event == null && Boolean.TRUE.equals(entity.getAttribute(Attributes.SERVICE_UP))) {
// If this enricher is registered after the entity is up, then we'll get a "synthetic"
// onEvent(null)
firstUpTime = System.currentTimeMillis();
}
}
super.onEvent(event);
}
static Object makeEntitySensorToken(SensorEvent<?> se) {
return makeEntitySensorToken(se.getSource(), se.getSensor());
}