private void closeWindow(
K key, W w, Map<W, AccumT> accumulators, Map<W, Instant> minTimestamps, ProcessContext c) {
AccumT accum = accumulators.remove(w);
Instant timestamp = minTimestamps.remove(w);
checkState(accum != null && timestamp != null);
c.windowingInternals()
.outputWindowedValue(
KV.of(key, combineFn.extractOutput(key, accum)),
timestamp,
Arrays.asList(w),
PaneInfo.ON_TIME_AND_ONLY_FIRING);
}
@Override
public OutputT read() {
return combineFn.extractOutput(key, accum);
}