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Disable http and rpc metrics when advice can not be applied (#10671)
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72 changes: 72 additions & 0 deletions
72
...api/src/main/java/io/opentelemetry/instrumentation/api/internal/OperationMetricsUtil.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,72 @@ | ||
| /* | ||
| * Copyright The OpenTelemetry Authors | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
|
|
||
| package io.opentelemetry.instrumentation.api.internal; | ||
|
|
||
| import io.opentelemetry.api.common.Attributes; | ||
| import io.opentelemetry.api.metrics.DoubleHistogramBuilder; | ||
| import io.opentelemetry.api.metrics.Meter; | ||
| import io.opentelemetry.context.Context; | ||
| import io.opentelemetry.extension.incubator.metrics.ExtendedDoubleHistogramBuilder; | ||
| import io.opentelemetry.instrumentation.api.instrumenter.OperationListener; | ||
| import io.opentelemetry.instrumentation.api.instrumenter.OperationMetrics; | ||
| import java.util.function.BiConsumer; | ||
| import java.util.function.Function; | ||
| import java.util.logging.Level; | ||
| import java.util.logging.Logger; | ||
|
|
||
| /** | ||
| * This class is internal and is hence not for public use. Its APIs are unstable and can change at | ||
| * any time. | ||
| */ | ||
| public class OperationMetricsUtil { | ||
| private static final Logger logger = Logger.getLogger(OperationMetricsUtil.class.getName()); | ||
| private static final OperationListener NOOP_OPERATION_LISTENER = | ||
| new OperationListener() { | ||
|
|
||
| @Override | ||
| public Context onStart(Context context, Attributes startAttributes, long startNanos) { | ||
| return context; | ||
| } | ||
|
|
||
| @Override | ||
| public void onEnd(Context context, Attributes endAttributes, long endNanos) {} | ||
| }; | ||
|
|
||
| public static OperationMetrics create( | ||
| String description, Function<Meter, OperationListener> factory) { | ||
| return create( | ||
| description, | ||
| factory, | ||
| (s, histogramBuilder) -> | ||
| logger.log( | ||
| Level.WARNING, | ||
| "Disabling {0} metrics because {1} does not implement {2}. This prevents using " | ||
| + "metrics advice, which could result in {0} having high cardinality attributes.", | ||
| new Object[] { | ||
| description, | ||
| histogramBuilder.getClass().getName(), | ||
| ExtendedDoubleHistogramBuilder.class.getName() | ||
| })); | ||
| } | ||
|
|
||
| // visible for testing | ||
| static OperationMetrics create( | ||
| String description, | ||
| Function<Meter, OperationListener> factory, | ||
| BiConsumer<String, DoubleHistogramBuilder> warningEmitter) { | ||
| return meter -> { | ||
| DoubleHistogramBuilder histogramBuilder = meter.histogramBuilder("compatibility-test"); | ||
| if (!(histogramBuilder instanceof ExtendedDoubleHistogramBuilder) | ||
| && !histogramBuilder.getClass().getName().contains("NoopDoubleHistogram")) { | ||
| warningEmitter.accept(description, histogramBuilder); | ||
| return NOOP_OPERATION_LISTENER; | ||
| } | ||
| return factory.apply(meter); | ||
| }; | ||
| } | ||
|
|
||
| private OperationMetricsUtil() {} | ||
| } |
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78 changes: 78 additions & 0 deletions
78
...src/test/java/io/opentelemetry/instrumentation/api/internal/OperationMetricsUtilTest.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| /* | ||
| * Copyright The OpenTelemetry Authors | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
|
|
||
| package io.opentelemetry.instrumentation.api.internal; | ||
|
|
||
| import io.opentelemetry.api.metrics.DoubleHistogramBuilder; | ||
| import io.opentelemetry.api.metrics.Meter; | ||
| import io.opentelemetry.api.metrics.MeterProvider; | ||
| import io.opentelemetry.instrumentation.api.instrumenter.OperationMetrics; | ||
| import io.opentelemetry.instrumentation.testing.junit.InstrumentationExtension; | ||
| import io.opentelemetry.instrumentation.testing.junit.LibraryInstrumentationExtension; | ||
| import java.lang.reflect.Proxy; | ||
| import java.util.concurrent.atomic.AtomicBoolean; | ||
| import org.assertj.core.api.Assertions; | ||
| import org.junit.jupiter.api.Test; | ||
| import org.junit.jupiter.api.extension.RegisterExtension; | ||
|
|
||
| class OperationMetricsUtilTest { | ||
| @RegisterExtension | ||
| static final InstrumentationExtension testing = LibraryInstrumentationExtension.create(); | ||
|
|
||
| @Test | ||
| void noWarning() { | ||
| AtomicBoolean warning = new AtomicBoolean(false); | ||
| OperationMetrics operationMetrics = | ||
| OperationMetricsUtil.create( | ||
| "test metrics", meter -> null, (s, doubleHistogramBuilder) -> warning.set(true)); | ||
| operationMetrics.create(testing.getOpenTelemetry().getMeter("test")); | ||
|
|
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| Assertions.assertThat(warning).isFalse(); | ||
| } | ||
|
|
||
| @Test | ||
| void noWarningWithNoopMetrics() { | ||
| AtomicBoolean warning = new AtomicBoolean(false); | ||
| OperationMetrics operationMetrics = | ||
| OperationMetricsUtil.create( | ||
| "test metrics", meter -> null, (s, doubleHistogramBuilder) -> warning.set(true)); | ||
| operationMetrics.create(MeterProvider.noop().get("test")); | ||
|
|
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| Assertions.assertThat(warning).isFalse(); | ||
| } | ||
|
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| @Test | ||
| void warning() { | ||
| AtomicBoolean warning = new AtomicBoolean(false); | ||
| OperationMetrics operationMetrics = | ||
| OperationMetricsUtil.create( | ||
| "test metrics", meter -> null, (s, doubleHistogramBuilder) -> warning.set(true)); | ||
| Meter defaultMeter = MeterProvider.noop().get("test"); | ||
| Meter meter = | ||
| (Meter) | ||
| Proxy.newProxyInstance( | ||
| Meter.class.getClassLoader(), | ||
| new Class<?>[] {Meter.class}, | ||
| (proxy, method, args) -> { | ||
| if ("histogramBuilder".equals(method.getName())) { | ||
| // proxy the histogram builder so that the builder instance does not implement | ||
| // ExtendedDoubleHistogramBuilder which will trigger the warning | ||
| return proxyDoubleHistogramBuilder(defaultMeter); | ||
| } | ||
| return method.invoke(defaultMeter, args); | ||
| }); | ||
| operationMetrics.create(meter); | ||
|
|
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| Assertions.assertThat(warning).isTrue(); | ||
| } | ||
|
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| private static DoubleHistogramBuilder proxyDoubleHistogramBuilder(Meter meter) { | ||
| return (DoubleHistogramBuilder) | ||
| Proxy.newProxyInstance( | ||
| DoubleHistogramBuilder.class.getClassLoader(), | ||
| new Class<?>[] {DoubleHistogramBuilder.class}, | ||
| (proxy1, method1, args1) -> meter.histogramBuilder((String) args1[0])); | ||
| } | ||
| } |