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Stable JVM semconv implementation: GC
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Mateusz Rzeszutek
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Nov 16, 2023
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...conv/java/io/opentelemetry/instrumentation/runtimemetrics/java8/GarbageCollectorTest.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,139 @@ | ||
| /* | ||
| * Copyright The OpenTelemetry Authors | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
|
|
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| package io.opentelemetry.instrumentation.runtimemetrics.java8; | ||
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| import static io.opentelemetry.instrumentation.runtimemetrics.java8.ScopeUtil.EXPECTED_SCOPE; | ||
| import static io.opentelemetry.sdk.testing.assertj.OpenTelemetryAssertions.assertThat; | ||
| import static java.util.Collections.singletonList; | ||
| import static org.mockito.ArgumentMatchers.any; | ||
| import static org.mockito.Mockito.mock; | ||
| import static org.mockito.Mockito.verify; | ||
| import static org.mockito.Mockito.when; | ||
|
|
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| import com.sun.management.GarbageCollectionNotificationInfo; | ||
| import com.sun.management.GcInfo; | ||
| import io.opentelemetry.api.common.Attributes; | ||
| import io.opentelemetry.instrumentation.testing.junit.InstrumentationExtension; | ||
| import io.opentelemetry.instrumentation.testing.junit.LibraryInstrumentationExtension; | ||
| import java.lang.management.GarbageCollectorMXBean; | ||
| import java.util.concurrent.atomic.AtomicLong; | ||
| import javax.management.Notification; | ||
| import javax.management.NotificationEmitter; | ||
| import javax.management.NotificationListener; | ||
| import org.junit.jupiter.api.Test; | ||
| import org.junit.jupiter.api.extension.ExtendWith; | ||
| import org.junit.jupiter.api.extension.RegisterExtension; | ||
| import org.mockito.ArgumentCaptor; | ||
| import org.mockito.Captor; | ||
| import org.mockito.Mock; | ||
| import org.mockito.junit.jupiter.MockitoExtension; | ||
| import org.mockito.junit.jupiter.MockitoSettings; | ||
| import org.mockito.quality.Strictness; | ||
|
|
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| @ExtendWith(MockitoExtension.class) | ||
| @MockitoSettings(strictness = Strictness.LENIENT) | ||
| class GarbageCollectorTest { | ||
|
|
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| static final double[] GC_DURATION_BUCKETS = | ||
| GarbageCollector.GC_DURATION_BUCKETS.stream().mapToDouble(d -> d).toArray(); | ||
|
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| @RegisterExtension | ||
| static final InstrumentationExtension testing = LibraryInstrumentationExtension.create(); | ||
|
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| @Mock(extraInterfaces = NotificationEmitter.class) | ||
| private GarbageCollectorMXBean gcBean; | ||
|
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| @Captor private ArgumentCaptor<NotificationListener> listenerCaptor; | ||
|
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| @Test | ||
| void registerObservers() { | ||
| GarbageCollector.registerObservers( | ||
| testing.getOpenTelemetry(), | ||
| singletonList(gcBean), | ||
| GarbageCollectorTest::getGcNotificationInfo); | ||
|
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| NotificationEmitter notificationEmitter = (NotificationEmitter) gcBean; | ||
| verify(notificationEmitter).addNotificationListener(listenerCaptor.capture(), any(), any()); | ||
| NotificationListener listener = listenerCaptor.getValue(); | ||
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| listener.handleNotification( | ||
| createTestNotification("G1 Young Generation", "end of minor GC", 10), null); | ||
| listener.handleNotification( | ||
| createTestNotification("G1 Young Generation", "end of minor GC", 12), null); | ||
| listener.handleNotification( | ||
| createTestNotification("G1 Old Generation", "end of major GC", 11), null); | ||
|
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| testing.waitAndAssertMetrics( | ||
| "io.opentelemetry.runtime-telemetry-java8", | ||
| "jvm.gc.duration", | ||
| metrics -> | ||
| metrics.anySatisfy( | ||
| metricData -> | ||
| assertThat(metricData) | ||
| .hasInstrumentationScope(EXPECTED_SCOPE) | ||
| .hasDescription("Duration of JVM garbage collection actions.") | ||
| .hasUnit("s") | ||
| .hasHistogramSatisfying( | ||
| histogram -> | ||
| histogram.hasPointsSatisfying( | ||
| point -> | ||
| point | ||
| .hasCount(2) | ||
| .hasSum(0.022) | ||
| .hasAttributes( | ||
| Attributes.builder() | ||
| .put("jvm.gc.name", "G1 Young Generation") | ||
| .put("jvm.gc.action", "end of minor GC") | ||
| .build()) | ||
| .hasBucketBoundaries(GC_DURATION_BUCKETS), | ||
| point -> | ||
| point | ||
| .hasCount(1) | ||
| .hasSum(0.011) | ||
| .hasAttributes( | ||
| Attributes.builder() | ||
| .put("jvm.gc.name", "G1 Old Generation") | ||
| .put("jvm.gc.action", "end of major GC") | ||
| .build()) | ||
| .hasBucketBoundaries(GC_DURATION_BUCKETS))))); | ||
| } | ||
|
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| private static Notification createTestNotification( | ||
| String gcName, String gcAction, long duration) { | ||
| GarbageCollectionNotificationInfo gcNotificationInfo = | ||
| mock(GarbageCollectionNotificationInfo.class); | ||
| when(gcNotificationInfo.getGcName()).thenReturn(gcName); | ||
| when(gcNotificationInfo.getGcAction()).thenReturn(gcAction); | ||
| GcInfo gcInfo = mock(GcInfo.class); | ||
| when(gcInfo.getDuration()).thenReturn(duration); | ||
| when(gcNotificationInfo.getGcInfo()).thenReturn(gcInfo); | ||
| return new TestNotification(gcNotificationInfo); | ||
| } | ||
|
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| private static GarbageCollectionNotificationInfo getGcNotificationInfo( | ||
| Notification notification) { | ||
| return ((TestNotification) notification).gcNotificationInfo; | ||
| } | ||
|
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| /** | ||
| * A {@link Notification} when is initialized with a mock {@link | ||
| * GarbageCollectionNotificationInfo}. | ||
| */ | ||
| private static class TestNotification extends Notification { | ||
|
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| private static final AtomicLong sequence = new AtomicLong(0); | ||
|
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| private final GarbageCollectionNotificationInfo gcNotificationInfo; | ||
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| private TestNotification(GarbageCollectionNotificationInfo gcNotificationInfo) { | ||
| super( | ||
| GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION, | ||
| "test", | ||
| sequence.incrementAndGet()); | ||
| this.gcNotificationInfo = gcNotificationInfo; | ||
| } | ||
| } | ||
| } |