runtime: add link to gRPC generic call code
@@ -91,8 +91,9 @@ bool GrpcClientNode::HandleInvocation(MessageChannelReadHalf* invocation_channel
// Use a completion queue together with a generic client reader/writer to
// perform the method invocation. All steps are done in serial, so just use
- // consecutive integer values for completion queue tags (there's no need to use the tag values for
- // correlation).
+ // consecutive integer values for completion queue tags (there's no need to
+ // use the tag values for correlation). Inspired by:
+ // https://github.com/grpc/grpc/blob/master/test/cpp/util/cli_call.cc
LOG(INFO) << "Invoke method " << method_name;
grpc::ClientContext ctx;
grpc::CompletionQueue cq;
