Otel metrics support

extensions/opentelemetry/deployment/src/main/java/io/quarkus/opentelemetry/deployment/OpenTelemetryProcessor.java

@@ -27,12 +27,14 @@
 
 import io.opentelemetry.api.OpenTelemetry;
 import io.opentelemetry.api.trace.SpanKind;
+import io.opentelemetry.exporter.otlp.internal.OtlpMetricExporterProvider;
 import io.opentelemetry.exporter.otlp.internal.OtlpSpanExporterProvider;
 import io.opentelemetry.instrumentation.annotations.AddingSpanAttributes;
 import io.opentelemetry.instrumentation.annotations.WithSpan;
 import io.opentelemetry.sdk.autoconfigure.spi.AutoConfigurationCustomizerProvider;
 import io.opentelemetry.sdk.autoconfigure.spi.ConfigurablePropagatorProvider;
 import io.opentelemetry.sdk.autoconfigure.spi.ResourceProvider;
+import io.opentelemetry.sdk.autoconfigure.spi.metrics.ConfigurableMetricExporterProvider;
 import io.opentelemetry.sdk.autoconfigure.spi.traces.ConfigurableSamplerProvider;
 import io.opentelemetry.sdk.autoconfigure.spi.traces.ConfigurableSpanExporterProvider;
 import io.quarkus.agroal.spi.JdbcDataSourceBuildItem;
@@ -105,6 +107,7 @@ AdditionalBeanBuildItem ensureProducerIsRetained() {
                         AutoConfiguredOpenTelemetrySdkBuilderCustomizer.ResourceCustomizer.class,
                         AutoConfiguredOpenTelemetrySdkBuilderCustomizer.SamplerCustomizer.class,
                         AutoConfiguredOpenTelemetrySdkBuilderCustomizer.TracerProviderCustomizer.class,
+                        AutoConfiguredOpenTelemetrySdkBuilderCustomizer.MetricProviderCustomizer.class,
                         AutoConfiguredOpenTelemetrySdkBuilderCustomizer.TextMapPropagatorCustomizers.class)
                 .build();
     }
@@ -144,11 +147,12 @@ void handleServices(OTelBuildConfig config,
             BuildProducer<RemovedResourceBuildItem> removedResources,
             BuildProducer<RuntimeReinitializedClassBuildItem> runtimeReinitialized) throws IOException {
 
-        List<String> spanExporterProviders = ServiceUtil.classNamesNamedIn(
+        final List<String> spanExporterProviders = ServiceUtil.classNamesNamedIn(
                 Thread.currentThread().getContextClassLoader(),
                 SPI_ROOT + ConfigurableSpanExporterProvider.class.getName())
                 .stream()
-                .filter(p -> !OtlpSpanExporterProvider.class.getName().equals(p)).collect(toList()); // filter out OtlpSpanExporterProvider since it depends on OkHttp
+                .filter(p -> !OtlpSpanExporterProvider.class.getName().equals(p))
+                .collect(toList()); // filter out OtlpSpanExporterProvider since it depends on OkHttp
         if (!spanExporterProviders.isEmpty()) {
             services.produce(
                     new ServiceProviderBuildItem(ConfigurableSpanExporterProvider.class.getName(), spanExporterProviders));
@@ -160,8 +164,26 @@ void handleServices(OTelBuildConfig config,
                     Set.of("META-INF/services/io.opentelemetry.sdk.autoconfigure.spi.traces.ConfigurableSpanExporterProvider")));
         }
 
+        final List<String> metricExporterProviders = ServiceUtil.classNamesNamedIn(
+                Thread.currentThread().getContextClassLoader(),
+                SPI_ROOT + ConfigurableMetricExporterProvider.class.getName())
+                .stream()
+                .filter(p -> !OtlpMetricExporterProvider.class.getName().equals(p))
+                .collect(toList()); // filter out OtlpMetricExporterProvider since it depends on OkHttp
+        if (!metricExporterProviders.isEmpty()) {
+            services.produce(
+                    new ServiceProviderBuildItem(ConfigurableMetricExporterProvider.class.getName(), metricExporterProviders));
+        }
+        if (config.metrics().exporter().stream().noneMatch(ExporterType.Constants.OTLP_VALUE::equals)) {
+            removedResources.produce(new RemovedResourceBuildItem(
+                    ArtifactKey.fromString("io.opentelemetry:opentelemetry-exporter-otlp"),
+                    Set.of("META-INF/services/io.opentelemetry.sdk.autoconfigure.spi.metrics.ConfigurableMetricExporterProvider")));
+        }
+
         runtimeReinitialized.produce(
                 new RuntimeReinitializedClassBuildItem("io.opentelemetry.sdk.autoconfigure.TracerProviderConfiguration"));
+        runtimeReinitialized.produce(
+                new RuntimeReinitializedClassBuildItem("io.opentelemetry.sdk.autoconfigure.MeterProviderConfiguration"));
 
         services.produce(ServiceProviderBuildItem.allProvidersFromClassPath(
                 ConfigurableSamplerProvider.class.getName()));

extensions/opentelemetry/deployment/src/main/java/io/quarkus/opentelemetry/deployment/exporter/otlp/OtlpExporterProcessor.java

@@ -13,25 +13,29 @@
 import org.jboss.jandex.ParameterizedType;
 import org.jboss.jandex.Type;
 
+import io.opentelemetry.sdk.metrics.export.MetricExporter;
 import io.opentelemetry.sdk.trace.SpanProcessor;
 import io.opentelemetry.sdk.trace.export.SpanExporter;
+import io.quarkus.arc.deployment.BeanDiscoveryFinishedBuildItem;
 import io.quarkus.arc.deployment.SyntheticBeanBuildItem;
 import io.quarkus.deployment.annotations.*;
 import io.quarkus.deployment.annotations.Record;
 import io.quarkus.opentelemetry.runtime.config.build.OTelBuildConfig;
 import io.quarkus.opentelemetry.runtime.config.build.exporter.OtlpExporterBuildConfig;
 import io.quarkus.opentelemetry.runtime.config.runtime.OTelRuntimeConfig;
 import io.quarkus.opentelemetry.runtime.config.runtime.exporter.OtlpExporterRuntimeConfig;
-import io.quarkus.opentelemetry.runtime.exporter.otlp.LateBoundBatchSpanProcessor;
 import io.quarkus.opentelemetry.runtime.exporter.otlp.OTelExporterRecorder;
+import io.quarkus.opentelemetry.runtime.exporter.otlp.tracing.LateBoundBatchSpanProcessor;
 import io.quarkus.tls.TlsConfigurationRegistry;
 import io.quarkus.tls.TlsRegistryBuildItem;
 import io.quarkus.vertx.core.deployment.CoreVertxBuildItem;
 
-@BuildSteps(onlyIf = OtlpExporterProcessor.OtlpExporterEnabled.class)
+@BuildSteps
 public class OtlpExporterProcessor {
 
-    static class OtlpExporterEnabled implements BooleanSupplier {
+    private static final DotName METRIC_EXPORTER = DotName.createSimple(MetricExporter.class.getName());
+
+    static class OtlpTracingExporterEnabled implements BooleanSupplier {
         OtlpExporterBuildConfig exportBuildConfig;
         OTelBuildConfig otelBuildConfig;
 
@@ -43,8 +47,20 @@ public boolean getAsBoolean() {
         }
     }
 
+    static class OtlpMetricsExporterEnabled implements BooleanSupplier {
+        OtlpExporterBuildConfig exportBuildConfig;
+        OTelBuildConfig otelBuildConfig;
+
+        public boolean getAsBoolean() {
+            return otelBuildConfig.enabled() &&
+                    otelBuildConfig.metrics().enabled().orElse(Boolean.TRUE) &&
+                    otelBuildConfig.metrics().exporter().contains(CDI_VALUE) &&
+                    exportBuildConfig.enabled();
+        }
+    }
+
     @SuppressWarnings("deprecation")
-    @BuildStep
+    @BuildStep(onlyIf = OtlpExporterProcessor.OtlpTracingExporterEnabled.class)
     @Record(ExecutionTime.RUNTIME_INIT)
     @Consume(TlsRegistryBuildItem.class)
     void createBatchSpanProcessor(OTelExporterRecorder recorder,
@@ -70,4 +86,41 @@ void createBatchSpanProcessor(OTelExporterRecorder recorder,
                         vertxBuildItem.getVertx()))
                 .done());
     }
+
+    @BuildStep(onlyIf = OtlpMetricsExporterEnabled.class)
+    @Record(ExecutionTime.RUNTIME_INIT)
+    @Consume(TlsRegistryBuildItem.class)
+    void createMetricsExporterProcessor(
+            BeanDiscoveryFinishedBuildItem beanDiscovery,
+            OTelExporterRecorder recorder,
+            List<ExternalOtelExporterBuildItem> externalOtelExporterBuildItem,
+            OTelRuntimeConfig otelRuntimeConfig,
+            OtlpExporterRuntimeConfig exporterRuntimeConfig,
+            CoreVertxBuildItem vertxBuildItem,
+            BuildProducer<SyntheticBeanBuildItem> syntheticBeanBuildItemBuildProducer) {
+
+        if (!externalOtelExporterBuildItem.isEmpty()) {
+            // if there is an external exporter, we don't want to create the default one.
+            // External exporter also use synthetic beans. However, synthetic beans don't show in the BeanDiscoveryFinishedBuildItem
+            return;
+        }
+
+        if (!beanDiscovery.beanStream().withBeanType(METRIC_EXPORTER).isEmpty()) {
+            // if there is a MetricExporter bean impl around, we don't want to create the default one
+            return;
+        }
+
+        syntheticBeanBuildItemBuildProducer.produce(SyntheticBeanBuildItem
+                .configure(MetricExporter.class)
+                .types(MetricExporter.class)
+                .setRuntimeInit()
+                .scope(Singleton.class)
+                .unremovable()
+                .addInjectionPoint(ParameterizedType.create(DotName.createSimple(Instance.class),
+                        new Type[] { ClassType.create(DotName.createSimple(MetricExporter.class.getName())) }, null))
+                .addInjectionPoint(ClassType.create(DotName.createSimple(TlsConfigurationRegistry.class)))
+                .createWith(recorder.createMetricExporter(otelRuntimeConfig, exporterRuntimeConfig,
+                        vertxBuildItem.getVertx()))
+                .done());
+    }
 }

extensions/opentelemetry/deployment/src/main/java/io/quarkus/opentelemetry/deployment/metric/MetricProcessor.java

@@ -0,0 +1,101 @@
+package io.quarkus.opentelemetry.deployment.metric;
+
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.function.BooleanSupplier;
+import java.util.function.Function;
+
+import org.jboss.jandex.AnnotationInstance;
+import org.jboss.jandex.AnnotationTarget;
+import org.jboss.jandex.DotName;
+import org.jboss.jandex.FieldInfo;
+import org.jboss.jandex.IndexView;
+import org.jboss.jandex.MethodInfo;
+
+import io.opentelemetry.sdk.metrics.export.MetricExporter;
+import io.opentelemetry.sdk.metrics.export.MetricReader;
+import io.quarkus.arc.deployment.AdditionalBeanBuildItem;
+import io.quarkus.arc.deployment.UnremovableBeanBuildItem;
+import io.quarkus.arc.processor.DotNames;
+import io.quarkus.deployment.annotations.BuildProducer;
+import io.quarkus.deployment.annotations.BuildStep;
+import io.quarkus.deployment.annotations.BuildSteps;
+import io.quarkus.deployment.builditem.CombinedIndexBuildItem;
+import io.quarkus.opentelemetry.runtime.config.build.OTelBuildConfig;
+import io.quarkus.opentelemetry.runtime.metrics.cdi.MetricsProducer;
+
+@BuildSteps(onlyIf = MetricProcessor.MetricEnabled.class)
+public class MetricProcessor {
+    private static final DotName METRIC_EXPORTER = DotName.createSimple(MetricExporter.class.getName());
+    private static final DotName METRIC_READER = DotName.createSimple(MetricReader.class.getName());
+    private static final DotName METRIC_PROCESSOR = DotName.createSimple(MetricProcessor.class.getName());
+
+    @BuildStep
+    UnremovableBeanBuildItem ensureProducersAreRetained(
+            CombinedIndexBuildItem indexBuildItem,
+            BuildProducer<AdditionalBeanBuildItem> additionalBeans) {
+
+        additionalBeans.produce(AdditionalBeanBuildItem.builder()
+                .setUnremovable()
+                .addBeanClass(MetricsProducer.class)
+                .build());
+
+        IndexView index = indexBuildItem.getIndex();
+
+        // Find all known SpanExporters and SpanProcessors
+        Collection<String> knownClasses = new HashSet<>();
+        knownClasses.add(METRIC_EXPORTER.toString());
+        index.getAllKnownImplementors(METRIC_EXPORTER)
+                .forEach(classInfo -> knownClasses.add(classInfo.name().toString()));
+
+        knownClasses.add(METRIC_READER.toString());
+        index.getAllKnownImplementors(METRIC_READER)
+                .forEach(classInfo -> knownClasses.add(classInfo.name().toString()));
+
+        knownClasses.add(METRIC_PROCESSOR.toString());
+        index.getAllKnownImplementors(METRIC_PROCESSOR)
+                .forEach(classInfo -> knownClasses.add(classInfo.name().toString()));
+
+        Set<String> retainProducers = new HashSet<>();
+
+        for (AnnotationInstance annotation : index.getAnnotations(DotNames.PRODUCES)) {
+            AnnotationTarget target = annotation.target();
+            switch (target.kind()) {
+                case METHOD:
+                    MethodInfo method = target.asMethod();
+                    String returnType = method.returnType().name().toString();
+                    if (knownClasses.contains(returnType)) {
+                        retainProducers.add(method.declaringClass().name().toString());
+                    }
+                    break;
+                case FIELD:
+                    FieldInfo field = target.asField();
+                    String fieldType = field.type().name().toString();
+                    if (knownClasses.contains(fieldType)) {
+                        retainProducers.add(field.declaringClass().name().toString());
+                    }
+                    break;
+                default:
+                    break;
+            }
+        }
+
+        return new UnremovableBeanBuildItem(new UnremovableBeanBuildItem.BeanClassNamesExclusion(retainProducers));
+    }
+
+    public static class MetricEnabled implements BooleanSupplier {
+        OTelBuildConfig otelBuildConfig;
+
+        public boolean getAsBoolean() {
+            return otelBuildConfig.metrics().enabled()
+                    .map(new Function<Boolean, Boolean>() {
+                        @Override
+                        public Boolean apply(Boolean enabled) {
+                            return otelBuildConfig.enabled() && enabled;
+                        }
+                    })
+                    .orElseGet(() -> otelBuildConfig.enabled());
+        }
+    }
+}

extensions/opentelemetry/deployment/src/main/java/io/quarkus/opentelemetry/deployment/tracing/TracerEnabled.java

@@ -9,12 +9,13 @@ public class TracerEnabled implements BooleanSupplier {
     OTelBuildConfig otelConfig;
 
     public boolean getAsBoolean() {
-        return otelConfig.traces().enabled().map(new Function<Boolean, Boolean>() {
-            @Override
-            public Boolean apply(Boolean tracerEnabled) {
-                return otelConfig.enabled() && tracerEnabled;
-            }
-        })
+        return otelConfig.traces().enabled()
+                .map(new Function<Boolean, Boolean>() {
+                    @Override
+                    public Boolean apply(Boolean tracerEnabled) {
+                        return otelConfig.enabled() && tracerEnabled;
+                    }
+                })
                 .orElseGet(() -> otelConfig.enabled());
     }
 }

extensions/opentelemetry/deployment/src/test/java/io/quarkus/opentelemetry/deployment/OpenTelemetryContinuousTestingTest.java

@@ -10,6 +10,7 @@
 import io.quarkus.opentelemetry.deployment.common.TestSpanExporter;
 import io.quarkus.opentelemetry.deployment.common.TestSpanExporterProvider;
 import io.quarkus.opentelemetry.deployment.common.TracerRouter;
+import io.quarkus.opentelemetry.deployment.traces.TracerRouterUT;
 import io.quarkus.test.ContinuousTestingTestUtils;
 import io.quarkus.test.ContinuousTestingTestUtils.TestStatus;
 import io.quarkus.test.QuarkusDevModeTest;
@@ -23,7 +24,8 @@ public class OpenTelemetryContinuousTestingTest {
                     .addAsResource(new StringAsset(TestSpanExporterProvider.class.getCanonicalName()),
                             "META-INF/services/io.opentelemetry.sdk.autoconfigure.spi.traces.ConfigurableSpanExporterProvider")
                     .add(new StringAsset(ContinuousTestingTestUtils.appProperties(
-                            "quarkus.otel.traces.exporter=test-span-exporter")),
+                            "quarkus.otel.traces.exporter=test-span-exporter",
+                            "quarkus.otel.metrics.exporter=none")),
                             "application.properties"))
             .setTestArchiveProducer(() -> ShrinkWrap.create(JavaArchive.class)
                     .addClass(TracerRouterUT.class));

extensions/opentelemetry/deployment/src/test/java/io/quarkus/opentelemetry/deployment/OpenTelemetryDestroyerTest.java

@@ -26,8 +26,11 @@ public class OpenTelemetryDestroyerTest {
                     .addAsResource(new StringAsset(TestSpanExporterProvider.class.getCanonicalName()),
                             "META-INF/services/io.opentelemetry.sdk.autoconfigure.spi.traces.ConfigurableSpanExporterProvider")
                     .add(new StringAsset(
-                            "quarkus.otel.traces.exporter=test-span-exporter\n" +
-                                    "quarkus.otel.experimental.shutdown-wait-time=PT60S\n"),
+                            """
+                                    quarkus.otel.traces.exporter=test-span-exporter
+                                    quarkus.otel.metrics.exporter=none
+                                    quarkus.otel.experimental.shutdown-wait-time=PT60S
+                                    """),
                             "application.properties"));
 
     @Test

extensions/opentelemetry/deployment/src/test/java/io/quarkus/opentelemetry/deployment/OpenTelemetryDevModeTest.java

@@ -23,7 +23,8 @@ public class OpenTelemetryDevModeTest {
                     .addAsResource(new StringAsset(TestSpanExporterProvider.class.getCanonicalName()),
                             "META-INF/services/io.opentelemetry.sdk.autoconfigure.spi.traces.ConfigurableSpanExporterProvider")
                     .add(new StringAsset(ContinuousTestingTestUtils.appProperties(
-                            "quarkus.otel.traces.exporter=test-span-exporter")), "application.properties"));
+                            "quarkus.otel.traces.exporter=test-span-exporter",
+                            "quarkus.otel.metrics.exporter=none")), "application.properties"));
 
     @Test
     void testDevMode() {

extensions/opentelemetry/deployment/src/test/java/io/quarkus/opentelemetry/deployment/OpenTelemetryDevServicesDatasourcesTest.java

@@ -41,11 +41,14 @@ public class OpenTelemetryDevServicesDatasourcesTest {
                     .addAsResource(new StringAsset(TestSpanExporterProvider.class.getCanonicalName()),
                             "META-INF/services/io.opentelemetry.sdk.autoconfigure.spi.traces.ConfigurableSpanExporterProvider")
                     .add(new StringAsset(
-                            "quarkus.datasource.db-kind=h2\n" +
-                                    "quarkus.datasource.jdbc.telemetry=true\n" +
-                                    "quarkus.otel.traces.exporter=test-span-exporter\n" +
-                                    "quarkus.otel.bsp.export.timeout=1s\n" +
-                                    "quarkus.otel.bsp.schedule.delay=50\n"),
+                            """
+                                    quarkus.datasource.db-kind=h2
+                                    quarkus.datasource.jdbc.telemetry=true
+                                    quarkus.otel.traces.exporter=test-span-exporter
+                                    quarkus.otel.metrics.exporter=none
+                                    quarkus.otel.bsp.export.timeout=1s
+                                    quarkus.otel.bsp.schedule.delay=50
+                                    """),
                             "application.properties"));
 
     @Test

extensions/opentelemetry/deployment/src/test/java/io/quarkus/opentelemetry/deployment/OpenTelemetryDisabledSdkTest.java

@@ -8,7 +8,7 @@
 import org.junit.jupiter.api.extension.RegisterExtension;
 
 import io.opentelemetry.api.OpenTelemetry;
-import io.quarkus.opentelemetry.runtime.exporter.otlp.LateBoundBatchSpanProcessor;
+import io.quarkus.opentelemetry.runtime.exporter.otlp.tracing.LateBoundBatchSpanProcessor;
 import io.quarkus.test.QuarkusUnitTest;
 
 @Disabled("Not implemented")