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139 changes: 139 additions & 0 deletions
139
...pentelemetry/src/test/java/io/prometheus/metrics/exporter/opentelemetry/ExemplarTest.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,139 @@ | ||
| package io.prometheus.metrics.exporter.opentelemetry; | ||
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| import com.github.tomakehurst.wiremock.http.Request; | ||
| import com.github.tomakehurst.wiremock.junit.WireMockRule; | ||
| import com.github.tomakehurst.wiremock.matching.MatchResult; | ||
| import com.github.tomakehurst.wiremock.matching.ValueMatcher; | ||
| import com.google.protobuf.InvalidProtocolBufferException; | ||
| import io.opentelemetry.api.trace.Span; | ||
| import io.opentelemetry.api.trace.Tracer; | ||
| import io.opentelemetry.context.Scope; | ||
| import io.opentelemetry.proto.collector.metrics.v1.ExportMetricsServiceRequest; | ||
| import io.opentelemetry.proto.metrics.v1.DoubleDataPoint; | ||
| import io.opentelemetry.proto.metrics.v1.InstrumentationLibraryMetrics; | ||
| import io.opentelemetry.proto.metrics.v1.Metric; | ||
| import io.opentelemetry.proto.metrics.v1.ResourceMetrics; | ||
| import io.opentelemetry.sdk.trace.SdkTracerProvider; | ||
| import io.opentelemetry.sdk.trace.samplers.Sampler; | ||
| import io.prometheus.metrics.core.metrics.Counter; | ||
| import io.prometheus.metrics.model.registry.PrometheusRegistry; | ||
| import org.awaitility.core.ConditionTimeoutException; | ||
| import org.junit.After; | ||
| import org.junit.Before; | ||
| import org.junit.Rule; | ||
| import org.junit.Test; | ||
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| import static com.github.tomakehurst.wiremock.client.WireMock.*; | ||
| import static java.util.concurrent.TimeUnit.SECONDS; | ||
| import static org.awaitility.Awaitility.await; | ||
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| public class ExemplarTest { | ||
| private static final String ENDPOINT_PATH = "/v1/metrics"; | ||
| private static final int TIMEOUT = 3; | ||
| private static final String INSTRUMENTATION_SCOPE_NAME = "testInstrumentationScope"; | ||
| private static final String SPAN_NAME = "test-span"; | ||
| public static final String TEST_COUNTER_NAME = "test_counter"; | ||
| private Counter testCounter; | ||
| private OpenTelemetryExporter openTelemetryExporter; | ||
| @Rule | ||
| public WireMockRule wireMockRule = new WireMockRule(4317); | ||
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| @Before | ||
| public void setUp() { | ||
| openTelemetryExporter = OpenTelemetryExporter.builder() | ||
| .endpoint("http://localhost:4317") | ||
| .protocol("http/protobuf") | ||
| .intervalSeconds(1) | ||
| .buildAndStart(); | ||
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| testCounter = Counter.builder() | ||
| .name(TEST_COUNTER_NAME) | ||
| .withExemplars() | ||
| .register(); | ||
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| wireMockRule.stubFor(post(ENDPOINT_PATH) | ||
| .withHeader("Content-Type", containing("application/x-protobuf")) | ||
| .willReturn(ok() | ||
| .withHeader("Content-Type", "application/json") | ||
| .withBody("{\"partialSuccess\":{}}"))); | ||
| } | ||
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| @After | ||
| public void tearDown() { | ||
| PrometheusRegistry.defaultRegistry.unregister(testCounter); | ||
| openTelemetryExporter.close(); | ||
| } | ||
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| @Test | ||
| public void sampledExemplarIsForwarded() { | ||
| try (SdkTracerProvider sdkTracerProvider = SdkTracerProvider.builder() | ||
| .setSampler(Sampler.alwaysOn()) | ||
| .build()) { | ||
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| Tracer test = sdkTracerProvider.get(INSTRUMENTATION_SCOPE_NAME); | ||
| Span span = test.spanBuilder(SPAN_NAME) | ||
| .startSpan(); | ||
| try (Scope scope = span.makeCurrent()) { | ||
| testCounter.inc(2); | ||
| } | ||
| } | ||
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| await().atMost(TIMEOUT, SECONDS) | ||
| .ignoreException(com.github.tomakehurst.wiremock.client.VerificationException.class) | ||
| .until(() -> { | ||
| verify(postRequestedFor(urlEqualTo(ENDPOINT_PATH)) | ||
| .withHeader("Content-Type", equalTo("application/x-protobuf")) | ||
| .andMatching(getExemplarCountMatcher(1))); | ||
| return true; | ||
| }); | ||
|
|
||
| } | ||
|
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| @Test(expected = ConditionTimeoutException.class) | ||
| public void notSampledExemplarIsNotForwarded() { | ||
| try (SdkTracerProvider sdkTracerProvider = SdkTracerProvider.builder() | ||
| .setSampler(Sampler.alwaysOff()) | ||
| .build()) { | ||
|
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| Tracer test = sdkTracerProvider.get(INSTRUMENTATION_SCOPE_NAME); | ||
| Span span = test.spanBuilder(SPAN_NAME) | ||
| .startSpan(); | ||
| try (Scope scope = span.makeCurrent()) { | ||
| testCounter.inc(2); | ||
| } | ||
| } | ||
|
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| await().atMost(TIMEOUT, SECONDS) | ||
| .ignoreException(com.github.tomakehurst.wiremock.client.VerificationException.class) | ||
| .until(() -> { | ||
| verify(postRequestedFor(urlEqualTo(ENDPOINT_PATH)) | ||
| .withHeader("Content-Type", equalTo("application/x-protobuf")) | ||
| .andMatching(getExemplarCountMatcher(1))); | ||
| return true; | ||
| }); | ||
|
|
||
| } | ||
|
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| private static ValueMatcher<Request> getExemplarCountMatcher(int expectedCount) { | ||
| return request -> { | ||
| try { | ||
| ExportMetricsServiceRequest exportMetricsServiceRequest = ExportMetricsServiceRequest.parseFrom(request.getBody()); | ||
| for (ResourceMetrics resourceMetrics : exportMetricsServiceRequest.getResourceMetricsList()) { | ||
| for (InstrumentationLibraryMetrics instrumentationLibraryMetrics : resourceMetrics.getInstrumentationLibraryMetricsList()) { | ||
| for (Metric metric : instrumentationLibraryMetrics.getMetricsList()) { | ||
| for (DoubleDataPoint doubleDataPoint : metric.getDoubleSum().getDataPointsList()) { | ||
| if (doubleDataPoint.getExemplarsCount() == expectedCount) { | ||
| return MatchResult.exactMatch(); | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } catch (InvalidProtocolBufferException e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| return MatchResult.noMatch(); | ||
| }; | ||
| } | ||
| } |