/** @deprecated since 0.7.0 only {@link AbstractEnricher} has emit convenience */
protected <T> void emit(Sensor<T> sensor, Object val) {
checkState(entity != null, "entity must first be set");
if (val == Entities.UNCHANGED) {
return;
}
if (val == Entities.REMOVE) {
((EntityInternal) entity).removeAttribute((AttributeSensor<T>) sensor);
return;
}
T newVal = TypeCoercions.coerce(val, sensor.getTypeToken());
if (sensor instanceof AttributeSensor) {
entity.sensors().set((AttributeSensor<T>) sensor, newVal);
} else {
entity.sensors().emit(sensor, newVal);
}
}
@SuppressWarnings({"unchecked", "rawtypes"})
@Override
public void setEntity(EntityLocal entity) {
super.setEntity(entity);
this.producer = getConfig(PRODUCER) == null ? entity : getConfig(PRODUCER);
this.sourceSensor = (Sensor<T>) getConfig(SOURCE_SENSOR);
Sensor<?> targetSensorSpecified = getConfig(TARGET_SENSOR);
List<? extends Sensor<?>> triggerSensorsSpecified = getConfig(TRIGGER_SENSORS);
List<? extends Sensor<?>> triggerSensors =
triggerSensorsSpecified != null ? triggerSensorsSpecified : ImmutableList.<Sensor<?>>of();
this.targetSensor =
targetSensorSpecified != null
? (Sensor<U>) targetSensorSpecified
: (Sensor<U>) this.sourceSensor;
if (targetSensor == null) {
throw new IllegalArgumentException(
"Enricher "
+ JavaClassNames.simpleClassName(this)
+ " has no "
+ TARGET_SENSOR.getName()
+ ", and it cannot be inferred as "
+ SOURCE_SENSOR.getName()
+ " is also not set");
}
if (sourceSensor == null && triggerSensors.isEmpty()) {
throw new IllegalArgumentException(
"Enricher "
+ JavaClassNames.simpleClassName(this)
+ " has no "
+ SOURCE_SENSOR.getName()
+ " and no "
+ TRIGGER_SENSORS.getName());
}
if (producer.equals(entity)
&& (targetSensor.equals(sourceSensor) || triggerSensors.contains(targetSensor))) {
// We cannot call getTransformation() here to log the tranformation, as it will attempt
// to resolve the transformation, which will cause the entity initialization thread to block
LOG.error(
"Refusing to add an enricher which reads and publishes on the same sensor: "
+ producer
+ "->"
+ targetSensor
+ " (computing transformation with "
+ JavaClassNames.simpleClassName(this)
+ ")");
// we don't throw because this error may manifest itself after a lengthy deployment,
// and failing it at that point simply because of an enricher is not very pleasant
// (at least not until we have good re-run support across the board)
return;
}
if (sourceSensor != null) {
subscriptions()
.subscribe(MutableMap.of("notifyOfInitialValue", true), producer, sourceSensor, this);
}
if (triggerSensors.size() > 0) {
SensorEventListener<Object> triggerListener =
new SensorEventListener<Object>() {
@Override
public void onEvent(SensorEvent<Object> event) {
if (sourceSensor != null) {
// Simulate an event, as though our sourceSensor changed
Object value = producer.getAttribute((AttributeSensor<?>) sourceSensor);
AbstractTransformer.this.onEvent(
new BasicSensorEvent(sourceSensor, producer, value, event.getTimestamp()));
} else {
// Assume the transform doesn't care about the value - otherwise it would
// have declared a sourceSensor!
AbstractTransformer.this.onEvent(null);
}
}
};
for (Object sensor : triggerSensors) {
if (sensor instanceof String) {
Sensor<?> resolvedSensor = entity.getEntityType().getSensor((String) sensor);
if (resolvedSensor == null) {
resolvedSensor = Sensors.newSensor(Object.class, (String) sensor);
}
sensor = resolvedSensor;
}
subscriptions()
.subscribe(
MutableMap.of("notifyOfInitialValue", true),
producer,
(Sensor<?>) sensor,
triggerListener);
}
}
}
