Examples with IterableView org.apache.beam.sdk.transforms.Materializations.IterableView used on opensource projects

Example 1 with IterableView

use of org.apache.beam.sdk.transforms.Materializations.IterableView in project beam by apache.

the class SparkSideInputReader method initializeBroadcastVariable.

private <T> Map<BoundedWindow, T> initializeBroadcastVariable(Iterable<WindowedValue<?>> inputValues, PCollectionView<T> view) {
    // first partition into windows
    Map<BoundedWindow, List<WindowedValue<?>>> partitionedElements = new HashMap<>();
    for (WindowedValue<?> value : inputValues) {
        for (BoundedWindow window : value.getWindows()) {
            List<WindowedValue<?>> windowedValues = partitionedElements.computeIfAbsent(window, k -> new ArrayList<>());
            windowedValues.add(value);
        }
    }
    Map<BoundedWindow, T> resultMap = new HashMap<>();
    for (Map.Entry<BoundedWindow, List<WindowedValue<?>>> elements : partitionedElements.entrySet()) {
        switch(view.getViewFn().getMaterialization().getUrn()) {
            case Materializations.ITERABLE_MATERIALIZATION_URN:
                {
                    ViewFn<IterableView, T> viewFn = (ViewFn<IterableView, T>) view.getViewFn();
                    resultMap.put(elements.getKey(), viewFn.apply(() -> elements.getValue().stream().map(WindowedValue::getValue).collect(Collectors.toList())));
                }
                break;
            case Materializations.MULTIMAP_MATERIALIZATION_URN:
                {
                    ViewFn<MultimapView, T> viewFn = (ViewFn<MultimapView, T>) view.getViewFn();
                    Coder<?> keyCoder = ((KvCoder<?, ?>) view.getCoderInternal()).getKeyCoder();
                    resultMap.put(elements.getKey(), viewFn.apply(InMemoryMultimapSideInputView.fromIterable(keyCoder, (Iterable) elements.getValue().stream().map(WindowedValue::getValue).collect(Collectors.toList()))));
                }
                break;
            default:
                throw new IllegalStateException(String.format("Unknown side input materialization format requested '%s'", view.getViewFn().getMaterialization().getUrn()));
        }
    }
    return resultMap;
}

Example 2 with IterableView

use of org.apache.beam.sdk.transforms.Materializations.IterableView in project beam by apache.

the class SparkSideInputReader method get.

@Override
@Nullable
public <T> T get(PCollectionView<T> view, BoundedWindow window) {
    // --- validate sideInput.
    checkNotNull(view, "The PCollectionView passed to sideInput cannot be null ");
    KV<WindowingStrategy<?, ?>, SideInputBroadcast<?>> windowedBroadcastHelper = sideInputs.get(view.getTagInternal());
    checkNotNull(windowedBroadcastHelper, "SideInput for view " + view + " is not available.");
    // --- sideInput window
    final BoundedWindow sideInputWindow = view.getWindowMappingFn().getSideInputWindow(window);
    // --- match the appropriate sideInput window.
    // a tag will point to all matching sideInputs, that is all windows.
    // now that we've obtained the appropriate sideInputWindow, all that's left is to filter by it.
    Iterable<WindowedValue<?>> availableSideInputs = (Iterable<WindowedValue<?>>) windowedBroadcastHelper.getValue().getValue();
    Iterable<?> sideInputForWindow = StreamSupport.stream(availableSideInputs.spliterator(), false).filter(sideInputCandidate -> {
        if (sideInputCandidate == null) {
            return false;
        }
        return Iterables.contains(sideInputCandidate.getWindows(), sideInputWindow);
    }).collect(Collectors.toList()).stream().map(WindowedValue::getValue).collect(Collectors.toList());
    switch(view.getViewFn().getMaterialization().getUrn()) {
        case Materializations.ITERABLE_MATERIALIZATION_URN:
            {
                ViewFn<IterableView, T> viewFn = (ViewFn<IterableView, T>) view.getViewFn();
                return viewFn.apply(() -> sideInputForWindow);
            }
        case Materializations.MULTIMAP_MATERIALIZATION_URN:
            {
                ViewFn<MultimapView, T> viewFn = (ViewFn<MultimapView, T>) view.getViewFn();
                Coder<?> keyCoder = ((KvCoder<?, ?>) view.getCoderInternal()).getKeyCoder();
                return viewFn.apply(InMemoryMultimapSideInputView.fromIterable(keyCoder, (Iterable) sideInputForWindow));
            }
        default:
            throw new IllegalStateException(String.format("Unknown side input materialization format requested '%s'", view.getViewFn().getMaterialization().getUrn()));
    }
}

Example 3 with IterableView

use of org.apache.beam.sdk.transforms.Materializations.IterableView in project beam by apache.

the class SideInputInitializer method initializeBroadcastVariable.

@Override
public Map<BoundedWindow, ViewT> initializeBroadcastVariable(Iterable<WindowedValue<?>> inputValues) {
    // first partition into windows
    Map<BoundedWindow, List<WindowedValue<?>>> partitionedElements = new HashMap<>();
    for (WindowedValue<?> value : inputValues) {
        for (BoundedWindow window : value.getWindows()) {
            List<WindowedValue<?>> windowedValues = partitionedElements.computeIfAbsent(window, k -> new ArrayList<>());
            windowedValues.add(value);
        }
    }
    Map<BoundedWindow, ViewT> resultMap = new HashMap<>();
    for (Map.Entry<BoundedWindow, List<WindowedValue<?>>> elements : partitionedElements.entrySet()) {
        switch(view.getViewFn().getMaterialization().getUrn()) {
            case Materializations.ITERABLE_MATERIALIZATION_URN:
                {
                    ViewFn<IterableView, ViewT> viewFn = (ViewFn<IterableView, ViewT>) view.getViewFn();
                    resultMap.put(elements.getKey(), viewFn.apply(() -> elements.getValue().stream().map(WindowedValue::getValue).collect(Collectors.toList())));
                }
                break;
            case Materializations.MULTIMAP_MATERIALIZATION_URN:
                {
                    ViewFn<MultimapView, ViewT> viewFn = (ViewFn<MultimapView, ViewT>) view.getViewFn();
                    Coder<?> keyCoder = ((KvCoder<?, ?>) view.getCoderInternal()).getKeyCoder();
                    resultMap.put(elements.getKey(), viewFn.apply(InMemoryMultimapSideInputView.fromIterable(keyCoder, (Iterable) elements.getValue().stream().map(WindowedValue::getValue).collect(Collectors.toList()))));
                }
                break;
            default:
                throw new IllegalStateException(String.format("Unknown side input materialization format requested '%s'", view.getViewFn().getMaterialization().getUrn()));
        }
    }
    return resultMap;
}