public static <W extends BoundedWindow, AccumT, OutputT>
TriggerTester<Integer, OutputT, W> combining(
WindowFn<?, W> windowFn,
Trigger<W> trigger,
AccumulationMode mode,
KeyedCombineFn<String, Integer, AccumT, OutputT> combineFn,
Coder<OutputT> outputCoder,
Duration allowedDataLateness)
throws Exception {
WindowingStrategy<?, W> strategy =
WindowingStrategy.of(windowFn)
.withTrigger(trigger)
.withMode(mode)
.withAllowedLateness(allowedDataLateness);
CoderRegistry registry = new CoderRegistry();
registry.registerStandardCoders();
AppliedCombineFn<String, Integer, AccumT, OutputT> fn =
AppliedCombineFn.<String, Integer, AccumT, OutputT>withInputCoder(
combineFn, registry, KvCoder.of(StringUtf8Coder.of(), VarIntCoder.of()));
return new TriggerTester<Integer, OutputT, W>(
strategy,
SystemReduceFn.<String, Integer, AccumT, OutputT, W>combining(StringUtf8Coder.of(), fn)
.create(KEY),
outputCoder);
}
public static <W extends BoundedWindow> TriggerTester<Integer, Iterable<Integer>, W> nonCombining(
WindowFn<?, W> windowFn,
Trigger<W> trigger,
AccumulationMode mode,
Duration allowedDataLateness)
throws Exception {
WindowingStrategy<?, W> strategy =
WindowingStrategy.of(windowFn)
.withTrigger(trigger)
.withMode(mode)
.withAllowedLateness(allowedDataLateness);
return nonCombining(strategy);
}