public static boolean isSupported(WindowingStrategy<?, ?> strategy) {
// TODO: Add support for other triggers.
if (!(strategy.getTrigger().getSpec() instanceof DefaultTrigger)) {
return false;
}
// Right now, we support ACCUMULATING_FIRED_PANES because it is the same as
// DISCARDING_FIRED_PANES. In Batch mode there is no late data so the default
// trigger (after watermark) will only fire once.
if (!strategy.getMode().equals(AccumulationMode.DISCARDING_FIRED_PANES)
&& !strategy.getMode().equals(AccumulationMode.ACCUMULATING_FIRED_PANES)) {
return false;
}
return true;
}
private TriggerTester(
WindowingStrategy<?, W> wildcardStrategy,
ReduceFn<String, InputT, OutputT, W> reduceFn,
Coder<OutputT> outputCoder)
throws Exception {
@SuppressWarnings("unchecked")
WindowingStrategy<Object, W> objectStrategy = (WindowingStrategy<Object, W>) wildcardStrategy;
this.windowFn = objectStrategy.getWindowFn();
this.stubContexts = new StubContexts();
this.outputCoder = outputCoder;
executableTrigger = wildcardStrategy.getTrigger();
this.runner =
new ReduceFnRunner<>(
KEY,
objectStrategy,
timerInternals,
stubContexts,
droppedDueToClosedWindow,
droppedDueToLateness,
reduceFn);
}