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Refactoring, adding a new test case based on open-telemetry/oteps#250
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129 changes: 129 additions & 0 deletions
129
...ent-sampling/src/test/java/io/opentelemetry/contrib/sampler/consistent56/UseCaseTest.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,129 @@ | ||
| /* | ||
| * Copyright The OpenTelemetry Authors | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
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| package io.opentelemetry.contrib.sampler.consistent56; | ||
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| import static io.opentelemetry.contrib.sampler.consistent56.ConsistentSampler.alwaysOff; | ||
| import static io.opentelemetry.contrib.sampler.consistent56.ConsistentSampler.alwaysOn; | ||
| import static io.opentelemetry.contrib.sampler.consistent56.ConsistentSamplingUtil.getInvalidThreshold; | ||
| import static io.opentelemetry.contrib.sampler.consistent56.Predicate.anySpan; | ||
| import static io.opentelemetry.contrib.sampler.consistent56.Predicate.isRootSpan; | ||
| import static io.opentelemetry.contrib.sampler.consistent56.PredicatedSampler.onMatch; | ||
| import static org.assertj.core.api.Assertions.assertThat; | ||
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| import io.opentelemetry.api.common.AttributeKey; | ||
| import io.opentelemetry.api.common.Attributes; | ||
| import io.opentelemetry.api.trace.SpanKind; | ||
| import org.junit.jupiter.api.Test; | ||
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| /** | ||
| * Testing a "real life" sampler configuration, as provided as an example in | ||
| * https://github.com/open-telemetry/oteps/pull/250. The example uses many different composite | ||
| * samplers combining them together to demonstrate the expressiveness and flexibility of the | ||
| * proposed specification. | ||
| */ | ||
| class UseCaseTest { | ||
| private static final long[] nanoTime = new long[] {0L}; | ||
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| private static final long nanoTime() { | ||
| return nanoTime[0]; | ||
| } | ||
| ; | ||
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| private static void advanceTime(long nanosIncrement) { | ||
| nanoTime[0] += nanosIncrement; | ||
| } | ||
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| // | ||
| // S = ConsistentRateLimiting( | ||
| // ConsistentAnyOf( | ||
| // ConsistentParentBased( | ||
| // ConsistentRuleBased(ROOT, { | ||
| // (http.target == /healthcheck) => ConsistentAlwaysOff, | ||
| // (http.target == /checkout) => ConsistentAlwaysOn, | ||
| // true => ConsistentFixedThreshold(0.25) | ||
| // }), | ||
| // ConsistentRuleBased(CLIENT, { | ||
| // (http.url == /foo) => ConsistentAlwaysOn | ||
| // } | ||
| // ), | ||
| // 1000.0 | ||
| // ) | ||
| // | ||
| private static final AttributeKey<String> httpTarget = AttributeKey.stringKey("http.target"); | ||
| private static final AttributeKey<String> httpUrl = AttributeKey.stringKey("http.url"); | ||
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| private static ConsistentSampler buildSampler() { | ||
| Predicate healthCheck = | ||
| Predicate.and( | ||
| isRootSpan(), | ||
| (parentContext, name, spanKind, attributes, parentLinks) -> { | ||
| return "/healthCheck".equals(attributes.get(httpTarget)); | ||
| }); | ||
| Predicate checkout = | ||
| Predicate.and( | ||
| isRootSpan(), | ||
| (parentContext, name, spanKind, attributes, parentLinks) -> { | ||
| return "/checkout".equals(attributes.get(httpTarget)); | ||
| }); | ||
| ComposableSampler s1 = | ||
| ConsistentSampler.parentBased( | ||
| ConsistentSampler.ruleBased( | ||
| null, | ||
| onMatch(healthCheck, alwaysOff()), | ||
| onMatch(checkout, alwaysOn()), | ||
| onMatch(anySpan(), ConsistentSampler.probabilityBased(0.25)))); | ||
| Predicate foo = | ||
| (parentContext, name, spanKind, attributes, parentLinks) -> { | ||
| return "/foo".equals(attributes.get(httpUrl)); | ||
| }; | ||
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| ComposableSampler s2 = ConsistentSampler.ruleBased(SpanKind.CLIENT, onMatch(foo, alwaysOn())); | ||
| ComposableSampler s3 = ConsistentSampler.anyOf(s1, s2); | ||
| return ConsistentSampler.rateLimited(s3, 1000.0, 5, UseCaseTest::nanoTime); | ||
| } | ||
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| @Test | ||
| void testDropHealthcheck() { | ||
| ConsistentSampler s = buildSampler(); | ||
| Attributes attributes = createAttributes(httpTarget, "/healthCheck"); | ||
| SamplingIntent intent = s.getSamplingIntent(null, "A", SpanKind.SERVER, attributes, null); | ||
| assertThat(intent.getThreshold()).isEqualTo(getInvalidThreshold()); | ||
| } | ||
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| @Test | ||
| void testSampleCheckout() { | ||
| ConsistentSampler s = buildSampler(); | ||
| advanceTime(1000000); | ||
| Attributes attributes = createAttributes(httpTarget, "/checkout"); | ||
| SamplingIntent intent = s.getSamplingIntent(null, "B", SpanKind.SERVER, attributes, null); | ||
| assertThat(intent.getThreshold()).isEqualTo(0L); | ||
| advanceTime(1000); // rate limiting should kick in | ||
| intent = s.getSamplingIntent(null, "B", SpanKind.SERVER, attributes, null); | ||
| assertThat(intent.getThreshold()).isGreaterThan(0L); | ||
| } | ||
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| @Test | ||
| void testSampleClient() { | ||
| ConsistentSampler s = buildSampler(); | ||
| advanceTime(1000000); | ||
| Attributes attributes = createAttributes(httpUrl, "/foo"); | ||
| SamplingIntent intent = s.getSamplingIntent(null, "C", SpanKind.CLIENT, attributes, null); | ||
| assertThat(intent.getThreshold()).isEqualTo(0L); | ||
| } | ||
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| @Test | ||
| void testOtherRoot() { | ||
| ConsistentSampler s = buildSampler(); | ||
| advanceTime(1000000); | ||
| Attributes attributes = Attributes.empty(); | ||
| SamplingIntent intent = s.getSamplingIntent(null, "D", SpanKind.SERVER, attributes, null); | ||
| assertThat(intent.getThreshold()).isEqualTo(0xc0000000000000L); | ||
| } | ||
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| private static Attributes createAttributes(AttributeKey<String> key, String value) { | ||
| return Attributes.builder().put(key, value).build(); | ||
| } | ||
| } |