feat: add registry-level client interceptor support for http container (#67)

Author: singhalprerana

platform-http-service-framework/build.gradle.kts

@@ -11,6 +11,7 @@ dependencies {
   api("com.google.inject:guice:5.1.0")
   api(project(":service-framework-spi"))
 
+  implementation(project(":platform-metrics"))
   implementation("org.slf4j:slf4j-api:1.7.36")
   implementation("com.google.inject.extensions:guice-servlet:5.1.0")
   implementation("com.google.guava:guava:31.1-jre")

platform-http-service-framework/src/main/java/org/hypertrace/core/serviceframework/http/StandAloneHttpPlatformServiceContainer.java

@@ -3,21 +3,31 @@
 import static io.grpc.Deadline.after;
 import static java.util.concurrent.TimeUnit.SECONDS;
 
+import io.micrometer.core.instrument.binder.grpc.MetricCollectingClientInterceptor;
 import java.util.List;
 import java.util.stream.Collectors;
 import lombok.extern.slf4j.Slf4j;
 import org.hypertrace.core.grpcutils.client.GrpcChannelRegistry;
+import org.hypertrace.core.grpcutils.client.GrpcRegistryConfig;
 import org.hypertrace.core.serviceframework.PlatformService;
 import org.hypertrace.core.serviceframework.config.ConfigClient;
 import org.hypertrace.core.serviceframework.http.jetty.JettyHttpServerBuilder;
+import org.hypertrace.core.serviceframework.metrics.PlatformMetricsRegistry;
 
 @Slf4j
 public abstract class StandAloneHttpPlatformServiceContainer extends PlatformService {
   private HttpContainer container;
-  private final GrpcChannelRegistry grpcChannelRegistry = new GrpcChannelRegistry();
+  private final GrpcChannelRegistry grpcChannelRegistry;
 
   public StandAloneHttpPlatformServiceContainer(ConfigClient config) {
     super(config);
+    grpcChannelRegistry =
+        new GrpcChannelRegistry(
+            GrpcRegistryConfig.builder()
+                .defaultInterceptor(
+                    new MetricCollectingClientInterceptor(
+                        PlatformMetricsRegistry.getMeterRegistry()))
+                .build());
   }
 
   protected abstract List<HttpHandlerFactory> getHandlerFactories();