OTel Metrics wiring plus exporter

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

@@ -13,6 +13,9 @@
 import org.jboss.jandex.ParameterizedType;
 import org.jboss.jandex.Type;
 
+import io.opentelemetry.sdk.metrics.export.MetricExporter;
+import io.opentelemetry.sdk.metrics.export.MetricReader;
+import io.opentelemetry.sdk.metrics.export.PeriodicMetricReader;
 import io.opentelemetry.sdk.trace.SpanProcessor;
 import io.opentelemetry.sdk.trace.export.SpanExporter;
 import io.quarkus.arc.deployment.AdditionalBeanBuildItem;
@@ -26,9 +29,9 @@
 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.EndUserSpanProcessor;
-import io.quarkus.opentelemetry.runtime.exporter.otlp.LateBoundBatchSpanProcessor;
 import io.quarkus.opentelemetry.runtime.exporter.otlp.OTelExporterRecorder;
+import io.quarkus.opentelemetry.runtime.exporter.otlp.tracing.EndUserSpanProcessor;
+import io.quarkus.opentelemetry.runtime.exporter.otlp.tracing.LateBoundBatchSpanProcessor;
 import io.quarkus.runtime.TlsConfig;
 import io.quarkus.vertx.core.deployment.CoreVertxBuildItem;
 
@@ -84,4 +87,32 @@ void createBatchSpanProcessor(OTelExporterRecorder recorder,
                         vertxBuildItem.getVertx()))
                 .done());
     }
+
+    @BuildStep
+    @Record(ExecutionTime.RUNTIME_INIT)
+    void createMetricsExporterProcessor(
+            OTelExporterRecorder recorder,
+            List<ExternalOtelExporterBuildItem> externalOtelExporterBuildItem,
+            OTelRuntimeConfig otelRuntimeConfig,
+            OtlpExporterRuntimeConfig exporterRuntimeConfig,
+            TlsConfig tlsConfig,
+            CoreVertxBuildItem vertxBuildItem,
+            BuildProducer<SyntheticBeanBuildItem> syntheticBeanBuildItemBuildProducer) {
+        if (!externalOtelExporterBuildItem.isEmpty()) {
+            // if there is an external exporter, we don't want to create the default one
+            return;
+        }
+
+        syntheticBeanBuildItemBuildProducer.produce(SyntheticBeanBuildItem
+                .configure(PeriodicMetricReader.class)// FIXME concrete class?
+                .types(MetricReader.class)
+                .setRuntimeInit()
+                .scope(Singleton.class)
+                .unremovable()
+                .addInjectionPoint(ParameterizedType.create(DotName.createSimple(Instance.class),
+                        new Type[] { ClassType.create(DotName.createSimple(MetricExporter.class.getName())) }, null))
+                .createWith(recorder.createMetricReader(otelRuntimeConfig, exporterRuntimeConfig, tlsConfig,
+                        vertxBuildItem.getVertx()))
+                .done());
+    }
 }

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")

extensions/opentelemetry/deployment/src/test/java/io/quarkus/opentelemetry/deployment/exporter/otlp/OtlpExporterDisabledTest.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;
 
 public class OtlpExporterDisabledTest {

extensions/opentelemetry/runtime/src/main/java/io/quarkus/opentelemetry/runtime/AutoConfiguredOpenTelemetrySdkBuilderCustomizer.java

@@ -9,6 +9,7 @@
 import java.util.ArrayList;
 import java.util.List;
 import java.util.function.BiFunction;
+import java.util.function.Predicate;
 
 import jakarta.enterprise.inject.Any;
 import jakarta.enterprise.inject.Instance;
@@ -17,6 +18,9 @@
 import io.opentelemetry.context.propagation.TextMapPropagator;
 import io.opentelemetry.sdk.autoconfigure.AutoConfiguredOpenTelemetrySdkBuilder;
 import io.opentelemetry.sdk.autoconfigure.spi.ConfigProperties;
+import io.opentelemetry.sdk.common.Clock;
+import io.opentelemetry.sdk.metrics.SdkMeterProviderBuilder;
+import io.opentelemetry.sdk.metrics.export.MetricReader;
 import io.opentelemetry.sdk.resources.Resource;
 import io.opentelemetry.sdk.trace.IdGenerator;
 import io.opentelemetry.sdk.trace.SdkTracerProviderBuilder;
@@ -25,7 +29,8 @@
 import io.quarkus.arc.All;
 import io.quarkus.opentelemetry.runtime.config.build.OTelBuildConfig;
 import io.quarkus.opentelemetry.runtime.config.runtime.OTelRuntimeConfig;
-import io.quarkus.opentelemetry.runtime.exporter.otlp.RemoveableLateBoundBatchSpanProcessor;
+import io.quarkus.opentelemetry.runtime.exporter.otlp.metrics.NoopMetricReader;
+import io.quarkus.opentelemetry.runtime.exporter.otlp.tracing.RemoveableLateBoundBatchSpanProcessor;
 import io.quarkus.opentelemetry.runtime.propagation.TextMapPropagatorCustomizer;
 import io.quarkus.opentelemetry.runtime.tracing.DelayedAttributes;
 import io.quarkus.opentelemetry.runtime.tracing.DropTargetsSampler;
@@ -71,7 +76,12 @@ public Resource apply(Resource existingResource, ConfigProperties configProperti
                         // inside resource customizer
                         String serviceName = oTelRuntimeConfig
                                 .serviceName()
-                                .filter(sn -> !sn.equals(appConfig.name.orElse("unset")))
+                                .filter(new Predicate<String>() {
+                                    @Override
+                                    public boolean test(String sn) {
+                                        return !sn.equals(appConfig.name.orElse("unset"));
+                                    }
+                                })
                                 .orElse(null);
 
                         // must be resolved at startup, once.
@@ -174,7 +184,12 @@ public SdkTracerProviderBuilder apply(SdkTracerProviderBuilder tracerProviderBui
                                 ConfigProperties configProperties) {
                             if (oTelBuildConfig.traces().enabled().orElse(TRUE)) {
                                 idGenerator.stream().findFirst().ifPresent(tracerProviderBuilder::setIdGenerator); // from cdi
-                                spanProcessors.stream().filter(sp -> !(sp instanceof RemoveableLateBoundBatchSpanProcessor))
+                                spanProcessors.stream().filter(new Predicate<SpanProcessor>() {
+                                    @Override
+                                    public boolean test(SpanProcessor sp) {
+                                        return !(sp instanceof RemoveableLateBoundBatchSpanProcessor);
+                                    }
+                                })
                                         .forEach(tracerProviderBuilder::addSpanProcessor);
                             }
                             return tracerProviderBuilder;
@@ -183,6 +198,47 @@ public SdkTracerProviderBuilder apply(SdkTracerProviderBuilder tracerProviderBui
         }
     }
 
+    @Singleton
+    final class MetricProviderCustomizer implements AutoConfiguredOpenTelemetrySdkBuilderCustomizer {
+        private final OTelBuildConfig oTelBuildConfig;
+        private final OTelRuntimeConfig oTelRuntimeConfig;
+        private final Clock clock;
+        private final List<MetricReader> metricReaders;
+
+        public MetricProviderCustomizer(OTelBuildConfig oTelBuildConfig,
+                final OTelRuntimeConfig oTelRuntimeConfig,
+                final Clock clock,
+                final List<MetricReader> metricReaders) {
+            this.oTelBuildConfig = oTelBuildConfig;
+            this.oTelRuntimeConfig = oTelRuntimeConfig;
+            this.clock = clock;
+            this.metricReaders = metricReaders;
+        }
+
+        @Override
+        public void customize(AutoConfiguredOpenTelemetrySdkBuilder builder) {
+            if (oTelBuildConfig.metrics().enabled().orElse(TRUE)) {
+                builder.addMeterProviderCustomizer(
+                        new BiFunction<SdkMeterProviderBuilder, ConfigProperties, SdkMeterProviderBuilder>() {
+                            @Override
+                            public SdkMeterProviderBuilder apply(SdkMeterProviderBuilder metricProvider,
+                                    ConfigProperties configProperties) {
+                                metricProvider.setClock(clock);
+                                metricReaders.stream()
+                                        .filter(new Predicate<MetricReader>() {
+                                            @Override
+                                            public boolean test(MetricReader metricReader) {
+                                                return !(metricReader instanceof NoopMetricReader);
+                                            }
+                                        })
+                                        .forEach(metricProvider::registerMetricReader);
+                                return metricProvider;
+                            }
+                        });
+            }
+        }
+    }
+
     @Singleton
     final class TextMapPropagatorCustomizers implements AutoConfiguredOpenTelemetrySdkBuilderCustomizer {
 

extensions/opentelemetry/runtime/src/main/java/io/quarkus/opentelemetry/runtime/config/build/EndUserSpanProcessorConfig.java

@@ -2,6 +2,7 @@
 
 import java.util.Optional;
 
+import io.quarkus.opentelemetry.runtime.exporter.otlp.tracing.EndUserSpanProcessor;
 import io.quarkus.runtime.annotations.ConfigGroup;
 import io.smallrye.config.WithDefault;
 
@@ -12,9 +13,9 @@
 public interface EndUserSpanProcessorConfig {
 
     /**
-     * Enable the {@link io.quarkus.opentelemetry.runtime.exporter.otlp.EndUserSpanProcessor}.
+     * Enable the {@link EndUserSpanProcessor}.
      * <p>
-     * The {@link io.quarkus.opentelemetry.runtime.exporter.otlp.EndUserSpanProcessor} adds
+     * The {@link EndUserSpanProcessor} adds
      * the {@link io.opentelemetry.semconv.SemanticAttributes.ENDUSER_ID}
      * and {@link io.opentelemetry.semconv.SemanticAttributes.ENDUSER_ROLE} to the Span.
      */

extensions/opentelemetry/runtime/src/main/java/io/quarkus/opentelemetry/runtime/config/runtime/MetricsRuntimeConfig.java

@@ -1,7 +1,5 @@
 package io.quarkus.opentelemetry.runtime.config.runtime;
 
-import static io.quarkus.opentelemetry.runtime.config.runtime.ExemplarsFilterType.Constants.TRACE_BASED;
-
 import java.time.Duration;
 
 import io.smallrye.config.WithDefault;
@@ -22,14 +20,14 @@ public interface MetricsRuntimeConfig {
     @WithDefault("60s")
     Duration exportInterval();
 
-    /**
-     * The filter for exemplar sampling. Can be ALWAYS_OFF, ALWAYS_ON or TRACE_BASED.
-     * <p>
-     * Default is TRACE_BASED.
-     *
-     * @return the value from {@value io.quarkus.opentelemetry.runtime.config.runtime.ExemplarsFilterType}.
-     */
-    @WithName("exemplars.filter")
-    @WithDefault(TRACE_BASED)
-    String exemplarsFilter();
+    //    /**
+    //     * The filter for exemplar sampling. Can be ALWAYS_OFF, ALWAYS_ON or TRACE_BASED.
+    //     * <p>
+    //     * Default is TRACE_BASED.
+    //     *
+    //     * @return the value from {@value io.quarkus.opentelemetry.runtime.config.runtime.ExemplarsFilterType}.
+    //     */
+    //    @WithName("exemplars.filter")
+    //    @WithDefault(TRACE_BASED)
+    //    String exemplarsFilter();
 }

extensions/opentelemetry/runtime/src/main/java/io/quarkus/opentelemetry/runtime/config/runtime/exporter/OtlpExporterConfig.java

@@ -0,0 +1,89 @@
+package io.quarkus.opentelemetry.runtime.config.runtime.exporter;
+
+import static io.quarkus.opentelemetry.runtime.config.runtime.exporter.OtlpExporterRuntimeConfig.DEFAULT_GRPC_BASE_URI;
+
+import java.time.Duration;
+import java.util.List;
+import java.util.Optional;
+
+import io.quarkus.runtime.annotations.ConfigGroup;
+import io.smallrye.config.WithDefault;
+import io.smallrye.config.WithName;
+
+@ConfigGroup
+public interface OtlpExporterConfig {
+
+    /**
+     * OTLP Exporter specific. Will override <code>otel.exporter.otlp.endpoint</code>, if set.
+     * <p>
+     * Fallbacks to the legacy property <code>quarkus.opentelemetry.tracer.exporter.otlp.endpoint<</code> or
+     * defaults to {@value OtlpExporterRuntimeConfig#DEFAULT_GRPC_BASE_URI}.
+     */
+    @WithDefault(DEFAULT_GRPC_BASE_URI)
+    Optional<String> endpoint();
+
+    /**
+     * Key-value pairs to be used as headers associated with gRPC requests.
+     * The format is similar to the {@code OTEL_EXPORTER_OTLP_HEADERS} environment variable,
+     * a list of key-value pairs separated by the "=" character. i.e.: key1=value1,key2=value2
+     */
+    Optional<List<String>> headers();
+
+    /**
+     * Sets the method used to compress payloads. If unset, compression is disabled. Currently
+     * supported compression methods include `gzip` and `none`.
+     */
+    Optional<CompressionType> compression();
+
+    /**
+     * Sets the maximum time to wait for the collector to process an exported batch of spans. If
+     * unset, defaults to {@value OtlpExporterRuntimeConfig#DEFAULT_TIMEOUT_SECS}s.
+     */
+    @WithDefault("10s")
+    Duration timeout();
+
+    /**
+     * OTLP defines the encoding of telemetry data and the protocol used to exchange data between the client and the
+     * server. Depending on the exporter, the available protocols will be different.
+     * <p>
+     * Currently, only {@code grpc} and {@code http/protobuf} are allowed.
+     */
+    @WithDefault(Protocol.GRPC)
+    Optional<String> protocol();
+
+    /**
+     * Key/cert configuration in the PEM format.
+     */
+    @WithName("key-cert")
+    KeyCert keyCert();
+
+    /**
+     * Trust configuration in the PEM format.
+     */
+    @WithName("trust-cert")
+    TrustCert trustCert();
+
+    interface KeyCert {
+        /**
+         * Comma-separated list of the path to the key files (Pem format).
+         */
+        Optional<List<String>> keys();
+
+        /**
+         * Comma-separated list of the path to the certificate files (Pem format).
+         */
+        Optional<List<String>> certs();
+    }
+
+    interface TrustCert {
+        /**
+         * Comma-separated list of the trust certificate files (Pem format).
+         */
+        Optional<List<String>> certs();
+    }
+
+    class Protocol {
+        public static final String GRPC = "grpc";
+        public static final String HTTP_PROTOBUF = "http/protobuf";
+    }
+}

extensions/opentelemetry/runtime/src/main/java/io/quarkus/opentelemetry/runtime/config/runtime/exporter/OtlpExporterRuntimeConfig.java

@@ -31,7 +31,11 @@ public interface OtlpExporterRuntimeConfig {
      * OTLP traces exporter configuration.
      */
     OtlpExporterTracesConfig traces();
-    // TODO metrics();
+
+    /**
+     * OTLP metrics exporter configuration.
+     */
+    OtlpExporterConfig metrics();
     // TODO logs();
     // TODO additional global exporter configuration