| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.beam.runners.jet.processors; |
| |
| import com.hazelcast.jet.core.AbstractProcessor; |
| import com.hazelcast.jet.core.Processor; |
| import com.hazelcast.jet.core.ResettableSingletonTraverser; |
| import com.hazelcast.jet.function.SupplierEx; |
| import java.util.Collection; |
| import javax.annotation.Nonnull; |
| import org.apache.beam.runners.jet.Utils; |
| import org.apache.beam.sdk.coders.Coder; |
| import org.apache.beam.sdk.transforms.windowing.BoundedWindow; |
| import org.apache.beam.sdk.transforms.windowing.WindowFn; |
| import org.apache.beam.sdk.util.WindowedValue; |
| import org.apache.beam.sdk.values.WindowingStrategy; |
| import org.apache.beam.vendor.guava.v20_0.com.google.common.collect.Iterables; |
| import org.joda.time.Instant; |
| |
| /** |
| * /** * Jet {@link com.hazelcast.jet.core.Processor} implementation for Beam's Windowing primitive. |
| * |
| * @param <T> type of element being windowed |
| */ |
| public class AssignWindowP<T> extends AbstractProcessor { |
| |
| @SuppressWarnings("FieldCanBeLocal") |
| private final String ownerId; // do not remove, useful for debugging |
| |
| private final ResettableSingletonTraverser<byte[]> traverser = |
| new ResettableSingletonTraverser<>(); |
| private final FlatMapper<byte[], byte[]> flatMapper; |
| private final WindowAssignContext<T> windowAssignContext; |
| |
| private AssignWindowP( |
| Coder inputCoder, |
| Coder outputCoder, |
| WindowingStrategy<T, BoundedWindow> windowingStrategy, |
| String ownerId) { |
| this.ownerId = ownerId; |
| |
| windowAssignContext = new WindowAssignContext<>(windowingStrategy.getWindowFn()); |
| |
| flatMapper = |
| flatMapper( |
| item -> { |
| Collection<BoundedWindow> windows; |
| WindowedValue<T> inputValue = Utils.decodeWindowedValue(item, inputCoder); |
| windowAssignContext.setValue(inputValue); |
| try { |
| windows = windowingStrategy.getWindowFn().assignWindows(windowAssignContext); |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| WindowedValue<T> outputValue = |
| WindowedValue.of( |
| inputValue.getValue(), |
| inputValue.getTimestamp(), |
| windows, |
| inputValue.getPane()); |
| traverser.accept(Utils.encodeWindowedValue(outputValue, outputCoder)); |
| return traverser; |
| }); |
| } |
| |
| public static <InputT> SupplierEx<Processor> supplier( |
| Coder inputCoder, |
| Coder outputCoder, |
| WindowingStrategy<InputT, BoundedWindow> windowingStrategy, |
| String ownerId) { |
| return () -> new AssignWindowP<>(inputCoder, outputCoder, windowingStrategy, ownerId); |
| } |
| |
| @Override |
| protected boolean tryProcess(int ordinal, @Nonnull Object item) { |
| return flatMapper.tryProcess((byte[]) item); |
| } |
| |
| private static class WindowAssignContext<InputT> |
| extends WindowFn<InputT, BoundedWindow>.AssignContext { |
| private WindowedValue<InputT> value; |
| |
| WindowAssignContext(WindowFn<InputT, BoundedWindow> fn) { |
| fn.super(); |
| } |
| |
| public void setValue(WindowedValue<InputT> value) { |
| if (Iterables.size(value.getWindows()) != 1) { |
| throw new IllegalArgumentException( |
| String.format( |
| "%s passed to window assignment must be in a single window, but it was in %s: %s", |
| WindowedValue.class.getSimpleName(), |
| Iterables.size(value.getWindows()), |
| value.getWindows())); |
| } |
| this.value = value; |
| } |
| |
| @Override |
| public InputT element() { |
| return value.getValue(); |
| } |
| |
| @Override |
| public Instant timestamp() { |
| return value.getTimestamp(); |
| } |
| |
| @Override |
| public BoundedWindow window() { |
| return Iterables.getOnlyElement(value.getWindows()); |
| } |
| } |
| } |