JaegerRemoteSampler use upstream grpc implementation if ManagedChannel is set

sdk-extensions/jaeger-remote-sampler/src/main/java/io/opentelemetry/sdk/extension/trace/jaeger/sampler/GrpcService.java

@@ -5,37 +5,17 @@
 
 package io.opentelemetry.sdk.extension.trace.jaeger.sampler;
 
-import io.grpc.ManagedChannel;
-import io.opentelemetry.exporter.internal.grpc.GrpcExporterBuilder;
-import io.opentelemetry.exporter.internal.grpc.MarshalerServiceStub;
 import io.opentelemetry.exporter.internal.marshal.Marshaler;
 import io.opentelemetry.sdk.common.CompletableResultCode;
-import java.net.URI;
-import java.util.function.Function;
-import java.util.function.Supplier;
 
-interface GrpcService<ReqMarshalerT extends Marshaler, ResUnMarshalerT extends UnMarshaler> {
-
-  /** Returns a new {@link GrpcExporterBuilder}. */
-  static <ReqMarshalerT extends Marshaler, ResUnMarshalerT extends UnMarshaler>
-      GrpcServiceBuilder<ReqMarshalerT, ResUnMarshalerT> builder(
-          String type,
-          long defaultTimeoutSecs,
-          URI defaultEndpoint,
-          Supplier<
-                  Function<ManagedChannel, MarshalerServiceStub<ReqMarshalerT, ResUnMarshalerT, ?>>>
-              stubFactory,
-          String grpcServiceName,
-          String grpcEndpointPath) {
-    return GrpcServiceUtil.serviceBuilder(
-        type, defaultTimeoutSecs, defaultEndpoint, stubFactory, grpcServiceName, grpcEndpointPath);
-  }
+interface GrpcService {
 
   /**
    * Exports the {@code exportRequest} which is a request {@link Marshaler} for {@code numItems}
    * items.
    */
-  ResUnMarshalerT execute(ReqMarshalerT request, ResUnMarshalerT response);
+  SamplingStrategyResponseUnMarshaler execute(
+      SamplingStrategyParametersMarshaler request, SamplingStrategyResponseUnMarshaler response);
 
   /** Shuts the exporter down. */
   CompletableResultCode shutdown();

sdk-extensions/jaeger-remote-sampler/src/main/java/io/opentelemetry/sdk/extension/trace/jaeger/sampler/JaegerRemoteSampler.java

@@ -36,13 +36,10 @@ public final class JaegerRemoteSampler implements Sampler, Closeable {
 
   private volatile Sampler sampler;
 
-  private final GrpcService<
-          SamplingStrategyParametersMarshaler, SamplingStrategyResponseUnMarshaler>
-      delegate;
+  private final GrpcService delegate;
 
   JaegerRemoteSampler(
-      GrpcService<SamplingStrategyParametersMarshaler, SamplingStrategyResponseUnMarshaler>
-          delegate,
+      GrpcService delegate,
       @Nullable String serviceName,
       int pollingIntervalMs,
       Sampler initialSampler) {