@Override
public TriggerResult onElement(Object element, long timestamp, W window, TriggerContext ctx)
throws Exception {
OperatorState<Boolean> first = ctx.getKeyValueState("first", true);
if (first.value()) {
long start = timestamp - (timestamp % interval);
long nextFireTimestamp = start + interval;
ctx.registerEventTimeTimer(nextFireTimestamp);
first.update(false);
return TriggerResult.CONTINUE;
}
return TriggerResult.CONTINUE;
}
@Override
public TriggerResult onEventTime(long time, W window, TriggerContext ctx) {
ctx.registerEventTimeTimer(time + interval);
return TriggerResult.FIRE;
}
