@Override
public void processElement(WindowedValue<KeyedWorkItem<K, V>> element) throws Exception {
KeyedWorkItem<K, V> workItem = element.getValue();
K key = workItem.key();
UncommittedBundle<KV<K, Iterable<V>>> bundle =
evaluationContext.createBundle(application.getOutput());
outputBundles.add(bundle);
CopyOnAccessInMemoryStateInternals<K> stateInternals =
(CopyOnAccessInMemoryStateInternals<K>) stepContext.stateInternals();
DirectTimerInternals timerInternals = stepContext.timerInternals();
ReduceFnRunner<K, V, Iterable<V>, BoundedWindow> reduceFnRunner =
new ReduceFnRunner<>(
key,
windowingStrategy,
ExecutableTriggerStateMachine.create(
TriggerStateMachines.stateMachineForTrigger(windowingStrategy.getTrigger())),
stateInternals,
timerInternals,
new DirectWindowingInternals<>(bundle),
droppedDueToClosedWindow,
reduceFn,
evaluationContext.getPipelineOptions());
// Drop any elements within expired windows
reduceFnRunner.processElements(
dropExpiredWindows(key, workItem.elementsIterable(), timerInternals));
for (TimerData timer : workItem.timersIterable()) {
reduceFnRunner.onTimer(timer);
}
reduceFnRunner.persist();
}
