| /* |
| * 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.spark.translation; |
| |
| import java.util.Collection; |
| import org.apache.beam.sdk.transforms.windowing.BoundedWindow; |
| import org.apache.beam.sdk.transforms.windowing.PaneInfo; |
| import org.apache.beam.sdk.transforms.windowing.Window.Assign; |
| import org.apache.beam.sdk.transforms.windowing.WindowFn; |
| import org.apache.beam.sdk.util.WindowedValue; |
| import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.collect.Iterables; |
| import org.apache.spark.api.java.function.Function; |
| import org.joda.time.Instant; |
| |
| /** An implementation of {@link Assign} for the Spark runner. */ |
| public class SparkAssignWindowFn<T, W extends BoundedWindow> |
| implements Function<WindowedValue<T>, WindowedValue<T>> { |
| |
| private final WindowFn<? super T, W> fn; |
| |
| public SparkAssignWindowFn(WindowFn<? super T, W> fn) { |
| this.fn = fn; |
| } |
| |
| @Override |
| @SuppressWarnings("unchecked") |
| public WindowedValue<T> call(WindowedValue<T> windowedValue) throws Exception { |
| final BoundedWindow boundedWindow = Iterables.getOnlyElement(windowedValue.getWindows()); |
| final T element = windowedValue.getValue(); |
| final Instant timestamp = windowedValue.getTimestamp(); |
| Collection<W> windows = |
| ((WindowFn<T, W>) fn) |
| .assignWindows( |
| ((WindowFn<T, W>) fn).new AssignContext() { |
| @Override |
| public T element() { |
| return element; |
| } |
| |
| @Override |
| public Instant timestamp() { |
| return timestamp; |
| } |
| |
| @Override |
| public BoundedWindow window() { |
| return boundedWindow; |
| } |
| }); |
| return WindowedValue.of(element, timestamp, windows, PaneInfo.NO_FIRING); |
| } |
| } |