How to use

FlinkMergingNonShuffleReduceFunction

in

org.apache.beam.runners.flink.translation.functions

@Override
public void reduce(
  Iterable<WindowedValue<KV<K, InputT>>> elements,
  Collector<WindowedValue<KV<K, OutputT>>> out) throws Exception {
 PipelineOptions options = serializedOptions.get();
 FlinkSideInputReader sideInputReader =
   new FlinkSideInputReader(sideInputs, getRuntimeContext());
 AbstractFlinkCombineRunner<K, InputT, AccumT, OutputT, W> reduceRunner;
 if (windowingStrategy.getWindowFn().windowCoder().equals(IntervalWindow.getCoder())) {
  reduceRunner = new SortingFlinkCombineRunner<>();
 } else {
  reduceRunner = new HashingFlinkCombineRunner<>();
 }
 reduceRunner.combine(
   new AbstractFlinkCombineRunner.CompleteFlinkCombiner<K, InputT, AccumT, OutputT>(combineFn),
   windowingStrategy,
   sideInputReader,
   options,
   elements,
   out);
}

new FlinkMergingNonShuffleReduceFunction<>(
  combineFn, boundedStrategy, sideInputStrategies, context.getPipelineOptions());

new FlinkMergingNonShuffleReduceFunction<>(
  combineFn, boundedStrategy, sideInputStrategies, context.getPipelineOptions());

 @Override
 public void reduce(
   Iterable<WindowedValue<KV<K, InputT>>> elements, Collector<WindowedValue<KV<K, OutputT>>> out)
   throws Exception {

  PipelineOptions options = serializedOptions.get();

  FlinkSideInputReader sideInputReader =
    new FlinkSideInputReader(sideInputs, getRuntimeContext());

  AbstractFlinkCombineRunner<K, InputT, AccumT, OutputT, W> reduceRunner;
  if (windowingStrategy.getWindowFn().windowCoder().equals(IntervalWindow.getCoder())) {
   reduceRunner = new SortingFlinkCombineRunner<>();
  } else {
   reduceRunner = new HashingFlinkCombineRunner<>();
  }

  reduceRunner.combine(
    new AbstractFlinkCombineRunner.CompleteFlinkCombiner<>(combineFn),
    windowingStrategy,
    sideInputReader,
    options,
    elements,
    out);
 }
}

reduceFunction = new FlinkMergingNonShuffleReduceFunction<>(
  combineFn, boundedStrategy, sideInputStrategies, context.getPipelineOptions());

 @Override
 public void reduce(
   Iterable<WindowedValue<KV<K, InputT>>> elements, Collector<WindowedValue<KV<K, OutputT>>> out)
   throws Exception {

  PipelineOptions options = serializedOptions.get();

  FlinkSideInputReader sideInputReader =
    new FlinkSideInputReader(sideInputs, getRuntimeContext());

  AbstractFlinkCombineRunner<K, InputT, AccumT, OutputT, W> reduceRunner;
  if (windowingStrategy.getWindowFn().windowCoder().equals(IntervalWindow.getCoder())) {
   reduceRunner = new SortingFlinkCombineRunner<>();
  } else {
   reduceRunner = new HashingFlinkCombineRunner<>();
  }

  reduceRunner.combine(
    new AbstractFlinkCombineRunner.CompleteFlinkCombiner<>(combineFn),
    windowingStrategy,
    sideInputReader,
    options,
    elements,
    out);
 }
}