| 1 | /* | |
| 2 | * Copyright 2014-2026 Grzegorz Piwowarek, https://4comprehension.com/ | |
| 3 | * | |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
| 5 | * you may not use this file except in compliance with the License. | |
| 6 | * You may obtain a copy of the License at | |
| 7 | * | |
| 8 | * https://www.apache.org/licenses/LICENSE-2.0 | |
| 9 | * | |
| 10 | * Unless required by applicable law or agreed to in writing, software | |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 13 | * See the License for the specific language governing permissions and | |
| 14 | * limitations under the License. | |
| 15 | */ | |
| 16 | package com.pivovarit.collectors; | |
| 17 | ||
| 18 | import java.util.ArrayList; | |
| 19 | import java.util.Collection; | |
| 20 | import java.util.Collections; | |
| 21 | import java.util.List; | |
| 22 | import java.util.Set; | |
| 23 | import java.util.concurrent.CompletableFuture; | |
| 24 | import java.util.concurrent.Executor; | |
| 25 | import java.util.function.BiConsumer; | |
| 26 | import java.util.function.BinaryOperator; | |
| 27 | import java.util.function.Function; | |
| 28 | import java.util.function.Supplier; | |
| 29 | import java.util.stream.Collector; | |
| 30 | import java.util.stream.Stream; | |
| 31 | ||
| 32 | import static com.pivovarit.collectors.BatchingSpliterator.batching; | |
| 33 | import static com.pivovarit.collectors.BatchingSpliterator.partitioned; | |
| 34 | import static java.util.concurrent.CompletableFuture.allOf; | |
| 35 | ||
| 36 | /** | |
| 37 | * @author Grzegorz Piwowarek | |
| 38 | */ | |
| 39 | final class AsyncParallelCollector<T, R, C> extends AbstractParallelCollector<T, R, CompletableFuture<C>> { | |
| 40 | ||
| 41 | private final Function<Stream<R>, C> finalizer; | |
| 42 | ||
| 43 | AsyncParallelCollector(Function<? super T, ? extends R> task, Dispatcher<R> dispatcher, Function<Stream<R>, C> finalizer) { | |
| 44 | super(task, dispatcher); | |
| 45 | this.finalizer = finalizer; | |
| 46 | } | |
| 47 | ||
| 48 | @Override | |
| 49 | public Function<List<CompletableFuture<R>>, CompletableFuture<C>> finalizer() { | |
| 50 |
1
1. finalizer : replaced return value with null for com/pivovarit/collectors/AsyncParallelCollector::finalizer → KILLED |
return futures -> { |
| 51 |
1
1. lambda$finalizer$1 : replaced return value with null for com/pivovarit/collectors/AsyncParallelCollector::lambda$finalizer$1 → KILLED |
var combined = allOf(futures.toArray(CompletableFuture[]::new)) |
| 52 |
1
1. lambda$finalizer$2 : replaced return value with Stream.empty for com/pivovarit/collectors/AsyncParallelCollector::lambda$finalizer$2 → KILLED |
.thenApply(__ -> futures.stream().map(CompletableFuture::join)); |
| 53 | ||
| 54 | var result = combined.thenApply(finalizer); | |
| 55 |
1
1. lambda$finalizer$0 : removed call to com/pivovarit/collectors/FutureCollectors::propagateFailureAndCancelOnFailure → TIMED_OUT |
FutureCollectors.propagateFailureAndCancelOnFailure(futures, combined, result); |
| 56 |
1
1. lambda$finalizer$0 : replaced return value with null for com/pivovarit/collectors/AsyncParallelCollector::lambda$finalizer$0 → KILLED |
return result; |
| 57 | }; | |
| 58 | } | |
| 59 | ||
| 60 | record BatchingCollector<T, R, C>(Function<? super T, ? extends R> task, Function<Stream<R>, C> finalizer, | |
| 61 | Executor executor, int parallelism) | |
| 62 | implements Collector<T, ArrayList<T>, CompletableFuture<C>> { | |
| 63 | ||
| 64 | @Override | |
| 65 | public Supplier<ArrayList<T>> supplier() { | |
| 66 |
1
1. supplier : replaced return value with null for com/pivovarit/collectors/AsyncParallelCollector$BatchingCollector::supplier → KILLED |
return ArrayList::new; |
| 67 | } | |
| 68 | ||
| 69 | @Override | |
| 70 | public BiConsumer<ArrayList<T>, T> accumulator() { | |
| 71 |
1
1. accumulator : replaced return value with null for com/pivovarit/collectors/AsyncParallelCollector$BatchingCollector::accumulator → KILLED |
return ArrayList::add; |
| 72 | } | |
| 73 | ||
| 74 | @Override | |
| 75 | public BinaryOperator<ArrayList<T>> combiner() { | |
| 76 |
1
1. combiner : replaced return value with null for com/pivovarit/collectors/AsyncParallelCollector$BatchingCollector::combiner → KILLED |
return (left, right) -> { |
| 77 | throw new UnsupportedOperationException("using parallel stream with parallel collectors is not supported"); | |
| 78 | }; | |
| 79 | } | |
| 80 | ||
| 81 | @Override | |
| 82 | public Function<ArrayList<T>, CompletableFuture<C>> finisher() { | |
| 83 |
1
1. finisher : replaced return value with null for com/pivovarit/collectors/AsyncParallelCollector$BatchingCollector::finisher → KILLED |
return items -> { |
| 84 |
1
1. lambda$finisher$0 : negated conditional → KILLED |
if (items.size() == parallelism) { |
| 85 |
1
1. lambda$finisher$0 : replaced return value with null for com/pivovarit/collectors/AsyncParallelCollector$BatchingCollector::lambda$finisher$0 → KILLED |
return items.stream() |
| 86 | .collect((Collector<T, ?, CompletableFuture<C>>) new AsyncParallelCollector<T, R, C>(task, new Dispatcher<>(executor, parallelism), finalizer)); | |
| 87 | } else { | |
| 88 |
1
1. lambda$finisher$0 : replaced return value with null for com/pivovarit/collectors/AsyncParallelCollector$BatchingCollector::lambda$finisher$0 → KILLED |
return partitioned(items, parallelism) |
| 89 |
1
1. lambda$finisher$1 : replaced return value with null for com/pivovarit/collectors/AsyncParallelCollector$BatchingCollector::lambda$finisher$1 → KILLED |
.collect((Collector<List<T>, ?, CompletableFuture<C>>) new AsyncParallelCollector<List<T>, List<R>, C>(batching(task), new Dispatcher<>(executor, parallelism), r -> finalizer.apply(r.flatMap(Collection::stream)))); |
| 90 | } | |
| 91 | }; | |
| 92 | } | |
| 93 | ||
| 94 | @Override | |
| 95 | public Set<Characteristics> characteristics() { | |
| 96 | return Collections.emptySet(); | |
| 97 | } | |
| 98 | } | |
| 99 | } | |
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