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Unify Collector definitions
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@pivovarit
pivovarit committed Sep 16, 2024
1 parent 9fbf2cd commit a92cc31
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35 changes: 11 additions & 24 deletions src/test/java/com/pivovarit/collectors/test/BasicParallelismTest.java
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Expand Up @@ -8,31 +8,28 @@
import java.time.Duration;
import java.util.List;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
import java.util.function.Function;
import java.util.function.Supplier;
import java.util.stream.Collector;
import java.util.stream.IntStream;
import java.util.stream.Stream;

import static com.pivovarit.collectors.test.BasicParallelismTest.CollectorDefinition.collector;
import static com.pivovarit.collectors.test.Factory.GenericCollector.limitedCollector;
import static com.pivovarit.collectors.test.Factory.e;
import static java.util.stream.Collectors.collectingAndThen;
import static java.util.stream.Collectors.toList;
import static org.assertj.core.api.AssertionsForClassTypes.assertThatThrownBy;
import static org.assertj.core.api.AssertionsForInterfaceTypes.assertThat;

class BasicParallelismTest {

private static Stream<CollectorDefinition<Integer, Integer>> allBounded() {
private static Stream<Factory.GenericCollector<Factory.CollectorFactoryWithParallelism<Integer, Integer>>> allBounded() {
return Stream.of(
collector("parallel(e, p)", (f, p) -> collectingAndThen(ParallelCollectors.parallel(f, e(), p), c -> c.join().toList())),
collector("parallel(toList(), e, p)", (f, p) -> collectingAndThen(ParallelCollectors.parallel(f, toList(), e(), p), CompletableFuture::join)),
collector("parallel(toList(), e, p) [batching]", (f, p) -> collectingAndThen(ParallelCollectors.Batching.parallel(f, toList(), e(), p), CompletableFuture::join)),
collector("parallelToStream(e, p)", (f, p) -> collectingAndThen(ParallelCollectors.parallelToStream(f, e(), p), Stream::toList)),
collector("parallelToStream(e, p) [batching]", (f, p) -> collectingAndThen(ParallelCollectors.Batching.parallelToStream(f, e(), p), Stream::toList)),
collector("parallelToOrderedStream(e, p)", (f, p) -> collectingAndThen(ParallelCollectors.parallelToOrderedStream(f, e(), p), Stream::toList)),
collector("parallelToOrderedStream(e, p) [batching]", (f, p) -> collectingAndThen(ParallelCollectors.Batching.parallelToOrderedStream(f, e(), p), Stream::toList))
limitedCollector("parallel(e, p)", (f, p) -> collectingAndThen(ParallelCollectors.parallel(f, e(), p), c -> c.join().toList())),
limitedCollector("parallel(toList(), e, p)", (f, p) -> collectingAndThen(ParallelCollectors.parallel(f, toList(), e(), p), CompletableFuture::join)),
limitedCollector("parallel(toList(), e, p) [batching]", (f, p) -> collectingAndThen(ParallelCollectors.Batching.parallel(f, toList(), e(), p), CompletableFuture::join)),
limitedCollector("parallelToStream(e, p)", (f, p) -> collectingAndThen(ParallelCollectors.parallelToStream(f, e(), p), Stream::toList)),
limitedCollector("parallelToStream(e, p) [batching]", (f, p) -> collectingAndThen(ParallelCollectors.Batching.parallelToStream(f, e(), p), Stream::toList)),
limitedCollector("parallelToOrderedStream(e, p)", (f, p) -> collectingAndThen(ParallelCollectors.parallelToOrderedStream(f, e(), p), Stream::toList)),
limitedCollector("parallelToOrderedStream(e, p) [batching]", (f, p) -> collectingAndThen(ParallelCollectors.Batching.parallelToOrderedStream(f, e(), p), Stream::toList))
);
}

Expand Down Expand Up @@ -76,19 +73,9 @@ Stream<DynamicTest> shouldRejectInvalidParallelism() {
})));
}

protected record CollectorDefinition<T, R>(String name, Factory.CollectorFactoryWithParallelism<T, R> factory) {
static <T, R> CollectorDefinition<T, R> collector(String name, Factory.CollectorFactoryWithParallelism<T, R> collector) {
return new CollectorDefinition<>(name, collector);
}
}

private static Executor e() {
return Executors.newCachedThreadPool();
}

private static Duration timed(Supplier<?> action) {
long start = System.currentTimeMillis();
var result = action.get();
var ignored = action.get();
return Duration.ofMillis(System.currentTimeMillis() - start);
}
}
71 changes: 7 additions & 64 deletions src/test/java/com/pivovarit/collectors/test/BasicProcessingTest.java
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@@ -1,75 +1,32 @@
package com.pivovarit.collectors.test;

import com.pivovarit.collectors.ParallelCollectors;
import org.junit.jupiter.api.DynamicTest;
import org.junit.jupiter.api.TestFactory;

import java.util.List;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;
import java.util.function.Function;
import java.util.stream.Collector;
import java.util.stream.IntStream;
import java.util.stream.Stream;

import static com.pivovarit.collectors.TestUtils.returnWithDelay;
import static com.pivovarit.collectors.test.BasicProcessingTest.CollectorDefinition.collector;
import static com.pivovarit.collectors.test.Factory.all;
import static com.pivovarit.collectors.test.Factory.allOrdered;
import static java.time.Duration.ofSeconds;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
import static java.util.concurrent.TimeUnit.SECONDS;
import static java.util.stream.Collectors.collectingAndThen;
import static java.util.stream.Collectors.toList;
import static org.assertj.core.api.Assertions.assertThatThrownBy;
import static org.assertj.core.api.AssertionsForInterfaceTypes.assertThat;
import static org.awaitility.Awaitility.await;

class BasicProcessingTest {

private static Stream<CollectorDefinition<Integer, Integer>> all() {
return Stream.of(
collector("parallel()", f -> collectingAndThen(ParallelCollectors.parallel(f), c -> c.join().toList())),
collector("parallel(e)", f -> collectingAndThen(ParallelCollectors.parallel(f, e()), c -> c.join().toList())),
collector("parallel(e, p)", f -> collectingAndThen(ParallelCollectors.parallel(f, e(), p()), c -> c.join().toList())),
collector("parallel(toList())", f -> collectingAndThen(ParallelCollectors.parallel(f, toList()), CompletableFuture::join)),
collector("parallel(toList(), e)", f -> collectingAndThen(ParallelCollectors.parallel(f, toList(), e()), CompletableFuture::join)),
collector("parallel(toList(), e, p)", f -> collectingAndThen(ParallelCollectors.parallel(f, toList(), e(), p()), CompletableFuture::join)),
collector("parallel(toList(), e, p) [batching]", f -> collectingAndThen(ParallelCollectors.Batching.parallel(f, toList(), e(), p()), CompletableFuture::join)),
collector("parallelToStream()", f -> collectingAndThen(ParallelCollectors.parallelToStream(f), Stream::toList)),
collector("parallelToStream(e)", f -> collectingAndThen(ParallelCollectors.parallelToStream(f, e()), Stream::toList)),
collector("parallelToStream(e, p)", f -> collectingAndThen(ParallelCollectors.parallelToStream(f, e(), p()), Stream::toList)),
collector("parallelToStream(e, p) [batching]", f -> collectingAndThen(ParallelCollectors.Batching.parallelToStream(f, e(), p()), Stream::toList)),
collector("parallelToOrderedStream()", f -> collectingAndThen(ParallelCollectors.parallelToOrderedStream(f), Stream::toList)),
collector("parallelToOrderedStream(e)", f -> collectingAndThen(ParallelCollectors.parallelToOrderedStream(f, e()), Stream::toList)),
collector("parallelToOrderedStream(e, p)", f -> collectingAndThen(ParallelCollectors.parallelToOrderedStream(f, e(), p()), Stream::toList)),
collector("parallelToOrderedStream(e, p) [batching]", f -> collectingAndThen(ParallelCollectors.Batching.parallelToOrderedStream(f, e(), p()), Stream::toList))
);
}

public static Stream<CollectorDefinition<Integer, Integer>> allOrdered() {
return Stream.of(
collector("parallel()", f -> collectingAndThen(ParallelCollectors.parallel(f), c -> c.join().toList())),
collector("parallel(e)", f -> collectingAndThen(ParallelCollectors.parallel(f, e()), c -> c.join().toList())),
collector("parallel(e, p)", f -> collectingAndThen(ParallelCollectors.parallel(f, e(), p()), c -> c.join().toList())),
collector("parallel(toList())", f -> collectingAndThen(ParallelCollectors.parallel(f, toList()), CompletableFuture::join)),
collector("parallel(toList(), e)", f -> collectingAndThen(ParallelCollectors.parallel(f, toList(), e()), CompletableFuture::join)),
collector("parallel(toList(), e, p)", f -> collectingAndThen(ParallelCollectors.parallel(f, toList(), e(), p()), CompletableFuture::join)),
collector("parallel(toList(), e, p) [batching]", f -> collectingAndThen(ParallelCollectors.Batching.parallel(f, toList(), e(), p()), CompletableFuture::join)),
collector("parallelToOrderedStream()", f -> collectingAndThen(ParallelCollectors.parallelToOrderedStream(f), Stream::toList)),
collector("parallelToOrderedStream(e)", f -> collectingAndThen(ParallelCollectors.parallelToOrderedStream(f, e()), Stream::toList)),
collector("parallelToOrderedStream(e, p)", f -> collectingAndThen(ParallelCollectors.parallelToOrderedStream(f, e(), p()), Stream::toList)),
collector("parallelToOrderedStream(e, p) [batching]", f -> collectingAndThen(ParallelCollectors.Batching.parallelToOrderedStream(f, e(), p()), Stream::toList))
);
}

@TestFactory
Stream<DynamicTest> shouldProcessEmpty() {
return all()
.map(c -> DynamicTest.dynamicTest(c.name(), () -> {
assertThat(Stream.<Integer>empty().collect(c.collector().collector(i -> i))).isEmpty();
assertThat(Stream.<Integer>empty().collect(c.factory().collector(i -> i))).isEmpty();
}));
}

Expand All @@ -78,7 +35,7 @@ Stream<DynamicTest> shouldProcessAllElements() {
return all()
.map(c -> DynamicTest.dynamicTest(c.name(), () -> {
var list = IntStream.range(0, 100).boxed().toList();
List<Integer> result = list.stream().collect(c.collector().collector(i -> i));
List<Integer> result = list.stream().collect(c.factory().collector(i -> i));
assertThat(result).containsExactlyInAnyOrderElementsOf(list);
}));
}
Expand All @@ -88,7 +45,7 @@ Stream<DynamicTest> shouldProcessAllElementsInOrder() {
return allOrdered()
.map(c -> DynamicTest.dynamicTest(c.name(), () -> {
var list = IntStream.range(0, 100).boxed().toList();
List<Integer> result = list.stream().collect(c.collector().collector(i -> i));
List<Integer> result = list.stream().collect(c.factory().collector(i -> i));
assertThat(result).containsAnyElementsOf(list);
}));
}
Expand All @@ -102,7 +59,7 @@ Stream<DynamicTest> shouldStartProcessingImmediately() {
Thread.startVirtualThread(() -> {
Stream.iterate(0, i -> i + 1)
.limit(100)
.collect(c.collector().collector(i -> returnWithDelay(counter.incrementAndGet(), ofSeconds(1))));
.collect(c.factory().collector(i -> returnWithDelay(counter.incrementAndGet(), ofSeconds(1))));
});

await()
Expand All @@ -121,7 +78,7 @@ Stream<DynamicTest> shouldInterruptOnException() {
var latch = new CountDownLatch(size);

assertThatThrownBy(() -> IntStream.range(0, size).boxed()
.collect(c.collector().collector(i -> {
.collect(c.factory().collector(i -> {
try {
latch.countDown();
latch.await();
Expand All @@ -139,18 +96,4 @@ Stream<DynamicTest> shouldInterruptOnException() {
await().atMost(1, SECONDS).until(() -> counter.get() == size - 1);
}));
}

record CollectorDefinition<T, R>(String name, Factory.CollectorFactory<T, R> collector) {
static <T, R> CollectorDefinition<T, R> collector(String name, Factory.CollectorFactory<T, R> collector) {
return new CollectorDefinition<>(name, collector);
}
}

private static Executor e() {
return Executors.newCachedThreadPool();
}

private static int p() {
return 4;
}
}
30 changes: 8 additions & 22 deletions src/test/java/com/pivovarit/collectors/test/BatchingTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -4,27 +4,23 @@
import org.junit.jupiter.api.DynamicTest;
import org.junit.jupiter.api.TestFactory;

import java.util.List;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ConcurrentSkipListSet;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
import java.util.function.Function;
import java.util.stream.Collector;
import java.util.stream.Stream;

import static com.pivovarit.collectors.test.BatchingTest.CollectorDefinition.collector;
import static com.pivovarit.collectors.test.Factory.GenericCollector.limitedCollector;
import static com.pivovarit.collectors.test.Factory.e;
import static java.util.stream.Collectors.collectingAndThen;
import static java.util.stream.Collectors.toList;
import static org.assertj.core.api.Assertions.assertThat;

class BatchingTest {
private static Stream<BatchingTest.CollectorDefinition<Integer, Integer>> allBatching() {
private static Stream<Factory.GenericCollector<Factory.CollectorFactoryWithParallelism<Integer, Integer>>> allBatching() {
return Stream.of(
collector("parallel(e, p) [batching]", (f, p) -> collectingAndThen(ParallelCollectors.Batching.parallel(f, e(), p), c -> c.thenApply(Stream::toList).join())),
collector("parallel(toList(), e, p) [batching]", (f, p) -> collectingAndThen(ParallelCollectors.Batching.parallel(f, toList(), e(), p), CompletableFuture::join)),
collector("parallelToStream(e, p) [batching]", (f, p) -> collectingAndThen(ParallelCollectors.Batching.parallelToStream(f, e(), p), Stream::toList)),
collector("parallelToOrderedStream(e, p) [batching]", (f, p) -> collectingAndThen(ParallelCollectors.Batching.parallelToOrderedStream(f, e(), p), Stream::toList))
limitedCollector("parallel(e, p) [batching]", (f, p) -> collectingAndThen(ParallelCollectors.Batching.parallel(f, e(), p), c -> c.thenApply(Stream::toList).join())),
limitedCollector("parallel(toList(), e, p) [batching]", (f, p) -> collectingAndThen(ParallelCollectors.Batching.parallel(f, toList(), e(), p), CompletableFuture::join)),
limitedCollector("parallelToStream(e, p) [batching]", (f, p) -> collectingAndThen(ParallelCollectors.Batching.parallelToStream(f, e(), p), Stream::toList)),
limitedCollector("parallelToOrderedStream(e, p) [batching]", (f, p) -> collectingAndThen(ParallelCollectors.Batching.parallelToOrderedStream(f, e(), p), Stream::toList))
);
}

Expand All @@ -37,22 +33,12 @@ Stream<DynamicTest> shouldProcessOnExactlyNThreads() {

Stream.generate(() -> 42)
.limit(100)
.collect(c.collector().collector(i -> {
.collect(c.factory().collector(i -> {
threads.add(Thread.currentThread().getName());
return i;
}, parallelism));

assertThat(threads).hasSizeLessThanOrEqualTo(parallelism);
}));
}

record CollectorDefinition<T, R>(String name, Factory.CollectorFactoryWithParallelism<T, R> collector) {
static <T, R> CollectorDefinition<T, R> collector(String name, Factory.CollectorFactoryWithParallelism<T, R> collector) {
return new CollectorDefinition<>(name, collector);
}
}

private static Executor e() {
return Executors.newCachedThreadPool();
}
}
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