public void onFire(W window, Timers timers, StateAccessor<?> state) throws Exception {
// shouldFire should be false.
// However it is too expensive to assert.
FinishedTriggersBitSet finishedSet = readFinishedBits(state.access(FINISHED_BITS_TAG)).copy();
TriggerStateMachine.TriggerContext context =
contextFactory.base(window, timers, rootTrigger, finishedSet);
rootTrigger.invokeOnFire(context);
persistFinishedSet(state, finishedSet);
}
/** Run the trigger logic to deal with a new value. */
public void processValue(W window, Instant timestamp, Timers timers, StateAccessor<?> state)
throws Exception {
// Clone so that we can detect changes and so that changes here don't pollute merging.
FinishedTriggersBitSet finishedSet = readFinishedBits(state.access(FINISHED_BITS_TAG)).copy();
TriggerStateMachine.OnElementContext triggerContext =
contextFactory.createOnElementContext(window, timers, timestamp, rootTrigger, finishedSet);
rootTrigger.invokeOnElement(triggerContext);
persistFinishedSet(state, finishedSet);
}
private void persistFinishedSet(
StateAccessor<?> state, FinishedTriggersBitSet modifiedFinishedSet) {
if (!isFinishedSetNeeded()) {
return;
}
ValueState<BitSet> finishedSetState = state.access(FINISHED_BITS_TAG);
if (!readFinishedBits(finishedSetState).equals(modifiedFinishedSet)) {
if (modifiedFinishedSet.getBitSet().isEmpty()) {
finishedSetState.clear();
} else {
finishedSetState.write(modifiedFinishedSet.getBitSet());
}
}
}
/** Return true if the trigger is closed in the window corresponding to the specified state. */
public boolean isClosed(StateAccessor<?> state) {
return readFinishedBits(state.access(FINISHED_BITS_TAG)).isFinished(rootTrigger);
}
/**
* Clear the state used for executing triggers, but leave the finished set to indicate the window
* is closed.
*/
public void clearState(W window, Timers timers, StateAccessor<?> state) throws Exception {
// Don't need to clone, because we'll be clearing the finished bits anyways.
FinishedTriggers finishedSet = readFinishedBits(state.access(FINISHED_BITS_TAG));
rootTrigger.invokeClear(contextFactory.base(window, timers, rootTrigger, finishedSet));
}
/** Clear the finished bits. */
public void clearFinished(StateAccessor<?> state) {
clearFinishedBits(state.access(FINISHED_BITS_TAG));
}
public boolean shouldFire(W window, Timers timers, StateAccessor<?> state) throws Exception {
FinishedTriggers finishedSet = readFinishedBits(state.access(FINISHED_BITS_TAG)).copy();
TriggerStateMachine.TriggerContext context =
contextFactory.base(window, timers, rootTrigger, finishedSet);
return rootTrigger.invokeShouldFire(context);
}
public void prefetchIsClosed(StateAccessor<?> state) {
if (isFinishedSetNeeded()) {
state.access(FINISHED_BITS_TAG).readLater();
}
}