Add @autoservice annotations to SPI implementations

Co-authored-by: trask <[email protected]>

Author: Copilot

consistent-sampling/build.gradle.kts

@@ -7,6 +7,8 @@ description = "Sampler and exporter implementations for consistent sampling"
 otelJava.moduleName.set("io.opentelemetry.contrib.sampler")
 
 dependencies {
+  annotationProcessor("com.google.auto.service:auto-service")
+  compileOnly("com.google.auto.service:auto-service-annotations")
   api("io.opentelemetry:opentelemetry-sdk-trace")
   api("io.opentelemetry:opentelemetry-sdk-extension-autoconfigure-spi")
   testImplementation("org.hipparchus:hipparchus-core:4.0.1")

consistent-sampling/src/main/java/io/opentelemetry/contrib/sampler/consistent/ParentBasedConsistentProbabilitySamplerProvider.java

@@ -5,10 +5,12 @@
 
 package io.opentelemetry.contrib.sampler.consistent;
 
+import com.google.auto.service.AutoService;
 import io.opentelemetry.sdk.autoconfigure.spi.ConfigProperties;
 import io.opentelemetry.sdk.autoconfigure.spi.traces.ConfigurableSamplerProvider;
 import io.opentelemetry.sdk.trace.samplers.Sampler;
 
+@AutoService(ConfigurableSamplerProvider.class)
 public final class ParentBasedConsistentProbabilitySamplerProvider
     implements ConfigurableSamplerProvider {
 

gcp-resources/build.gradle.kts

@@ -8,6 +8,8 @@ description = "OpenTelemetry GCP Resources Support"
 otelJava.moduleName.set("io.opentelemetry.contrib.gcp.resource")
 
 dependencies {
+  annotationProcessor("com.google.auto.service:auto-service")
+  compileOnly("com.google.auto.service:auto-service-annotations")
   api("io.opentelemetry:opentelemetry-api")
   compileOnly("io.opentelemetry:opentelemetry-api-incubator")
   api("io.opentelemetry:opentelemetry-sdk")

gcp-resources/src/main/java/io/opentelemetry/contrib/gcp/resource/GCPResourceProvider.java

@@ -50,6 +50,7 @@
 import static io.opentelemetry.contrib.gcp.resource.IncubatingAttributes.HOST_TYPE;
 import static io.opentelemetry.contrib.gcp.resource.IncubatingAttributes.K8S_CLUSTER_NAME;
 
+import com.google.auto.service.AutoService;
 import com.google.cloud.opentelemetry.detection.DetectedPlatform;
 import com.google.cloud.opentelemetry.detection.GCPPlatformDetector;
 import io.opentelemetry.api.common.Attributes;
@@ -61,6 +62,7 @@
 import java.util.Optional;
 import java.util.logging.Logger;
 
+@AutoService(ConditionalResourceProvider.class)
 @SuppressWarnings("MemberName")
 public final class GCPResourceProvider implements ConditionalResourceProvider {
 

gcp-resources/src/main/java/io/opentelemetry/contrib/gcp/resource/internal/GcpResourceDetector.java

@@ -5,13 +5,16 @@
 
 package io.opentelemetry.contrib.gcp.resource.internal;
 
+import com.google.auto.service.AutoService;
 import io.opentelemetry.api.incubator.config.DeclarativeConfigProperties;
 import io.opentelemetry.contrib.gcp.resource.GCPResourceProvider;
 import io.opentelemetry.sdk.autoconfigure.spi.internal.ComponentProvider;
 import io.opentelemetry.sdk.resources.Resource;
 import io.opentelemetry.sdk.resources.ResourceBuilder;
 
-public class GcpResourceDetector implements ComponentProvider<Resource> {
+@AutoService(ComponentProvider.class)
+@SuppressWarnings("rawtypes")
+public final class GcpResourceDetector implements ComponentProvider<Resource> {
 
   @Override
   public Class<Resource> getType() {