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ForkJoinPoolTest.java
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ForkJoinPoolTest.java
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/*
* Licensed to Elasticsearch B.V. under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch B.V. 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 co.elastic.apm.agent.concurrent;
import co.elastic.apm.agent.AbstractInstrumentationTest;
import co.elastic.apm.agent.impl.transaction.Transaction;
import co.elastic.apm.agent.tracer.ElasticContext;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ForkJoinPool;
import java.util.concurrent.ForkJoinTask;
import java.util.function.Supplier;
import java.util.stream.Stream;
import static co.elastic.apm.agent.concurrent.ForkJoinPoolTest.AdaptedSupplier.newTask;
import static org.assertj.core.api.Assertions.assertThat;
public class ForkJoinPoolTest extends AbstractInstrumentationTest {
private ForkJoinPool pool;
private Transaction transaction;
private ElasticContext<?> txWithBaggage;
@BeforeEach
void setUp() {
pool = new ForkJoinPool();
transaction = tracer.startRootTransaction(null).withName("transaction").activate();
txWithBaggage = tracer.currentContext().withUpdatedBaggage().put("foo", "bar").buildContext().activate();
}
@AfterEach
void tearDown() {
assertThat(tracer.getActive()).isEqualTo(transaction);
assertThat(tracer.currentContext()).isSameAs(txWithBaggage);
txWithBaggage.deactivate();
transaction.deactivate().end();
}
@Test
void testExecute() throws Exception {
final ForkJoinTask<ElasticContext<?>> task = newTask(() -> tracer.currentContext());
pool.execute(task);
assertThat(task.get()).isSameAs(txWithBaggage);
}
@Test
void testSubmit() throws Exception {
assertThat(pool.submit(newTask(() -> tracer.currentContext())).get()).isSameAs(txWithBaggage);
}
@Test
void testInvoke() throws Exception {
assertThat(pool.invoke(newTask(() -> tracer.currentContext()))).isSameAs(txWithBaggage);
}
@Test
void testCompletableFuture() throws Exception {
// This test fails when debugging the tests in IntelliJ and the instrumenting agent is active
// Either run in non-debug mode or go to
// Preferences | Build, Execution, Deployment | Debugger | Async Stack Traces
// and uncheck the Instrumenting Agent checkbox
assertThat(CompletableFuture
.supplyAsync(() -> tracer.currentContext())
.thenApplyAsync(active -> tracer.currentContext())
.get())
.isSameAs(txWithBaggage);
}
@Test
void testParallelStream() {
assertThat(Stream.of("foo", "bar", "baz")
.parallel()
.<ElasticContext<?>>map(s -> tracer.currentContext())
.distinct())
.containsExactly(txWithBaggage);
}
public static class AdaptedSupplier<V> extends ForkJoinTask<V> implements Runnable {
private final Supplier<V> supplier;
private V result;
public static <V> ForkJoinTask<V> newTask(Supplier<V> supplier) {
return new AdaptedSupplier<>(supplier);
}
private AdaptedSupplier(Supplier<V> supplier) {
this.supplier = supplier;
}
@Override
public V getRawResult() {
return result;
}
@Override
protected void setRawResult(V value) {
result = value;
}
@Override
protected boolean exec() {
result = supplier.get();
return true;
}
@Override
public final void run() {
invoke();
}
}
}