| /* |
| * 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.core; |
| |
| import java.util.Collections; |
| import java.util.Objects; |
| import org.apache.beam.runners.core.TimerInternals.TimerData; |
| import org.apache.beam.sdk.util.WindowedValue; |
| import org.apache.beam.vendor.guava.v20_0.com.google.common.base.MoreObjects; |
| import org.apache.beam.vendor.guava.v20_0.com.google.common.collect.Iterables; |
| |
| /** Static utility methods that provide {@link KeyedWorkItem} implementations. */ |
| public class KeyedWorkItems { |
| /** |
| * Returns an implementation of {@link KeyedWorkItem} that wraps around an elements iterable. |
| * |
| * @param <K> the key type |
| * @param <ElemT> the element type |
| */ |
| public static <K, ElemT> KeyedWorkItem<K, ElemT> elementsWorkItem( |
| K key, Iterable<WindowedValue<ElemT>> elementsIterable) { |
| return new ComposedKeyedWorkItem<>(key, Collections.emptyList(), elementsIterable); |
| } |
| |
| /** |
| * Returns an implementation of {@link KeyedWorkItem} that wraps around an timers iterable. |
| * |
| * @param <K> the key type |
| * @param <ElemT> the element type |
| */ |
| public static <K, ElemT> KeyedWorkItem<K, ElemT> timersWorkItem( |
| K key, Iterable<TimerData> timersIterable) { |
| return new ComposedKeyedWorkItem<>( |
| key, timersIterable, Collections.<WindowedValue<ElemT>>emptyList()); |
| } |
| |
| /** |
| * Returns an implementation of {@link KeyedWorkItem} that wraps around an timers iterable and an |
| * elements iterable. |
| * |
| * @param <K> the key type |
| * @param <ElemT> the element type |
| */ |
| public static <K, ElemT> KeyedWorkItem<K, ElemT> workItem( |
| K key, Iterable<TimerData> timersIterable, Iterable<WindowedValue<ElemT>> elementsIterable) { |
| return new ComposedKeyedWorkItem<>(key, timersIterable, elementsIterable); |
| } |
| |
| /** |
| * A {@link KeyedWorkItem} composed of an underlying key, {@link TimerData} iterable, and element |
| * iterable. |
| */ |
| public static class ComposedKeyedWorkItem<K, ElemT> implements KeyedWorkItem<K, ElemT> { |
| private final K key; |
| private final Iterable<TimerData> timers; |
| private final Iterable<WindowedValue<ElemT>> elements; |
| |
| private ComposedKeyedWorkItem( |
| K key, Iterable<TimerData> timers, Iterable<WindowedValue<ElemT>> elements) { |
| this.key = key; |
| this.timers = timers; |
| this.elements = elements; |
| } |
| |
| @Override |
| public K key() { |
| return key; |
| } |
| |
| @Override |
| public Iterable<TimerData> timersIterable() { |
| return timers; |
| } |
| |
| @Override |
| public Iterable<WindowedValue<ElemT>> elementsIterable() { |
| return elements; |
| } |
| |
| @Override |
| public boolean equals(Object other) { |
| if (other == null || !(other instanceof ComposedKeyedWorkItem)) { |
| return false; |
| } |
| KeyedWorkItem<?, ?> that = (KeyedWorkItem<?, ?>) other; |
| return Objects.equals(this.key, that.key()) |
| && Iterables.elementsEqual(this.timersIterable(), that.timersIterable()) |
| && Iterables.elementsEqual(this.elementsIterable(), that.elementsIterable()); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(key, timers, elements); |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper(ComposedKeyedWorkItem.class) |
| .add("key", key) |
| .add("elements", elements) |
| .add("timers", timers) |
| .toString(); |
| } |
| } |
| } |