Merge pull request #20 from yang-g/c++api

AND status in FinalizeResult instead of setting it. Clear user provided recv_message proto when adding it.

src/cpp/common/call.cc

@@ -31,6 +31,7 @@
  *
  */
 
+#include <google/protobuf/message.h>
 #include <grpc/support/alloc.h>
 #include <grpc++/impl/call.h>
 #include <grpc++/client_context.h>
@@ -144,6 +145,7 @@ void CallOpBuffer::AddSendMessage(const google::protobuf::Message& message) {
 
 void CallOpBuffer::AddRecvMessage(google::protobuf::Message* message) {
   recv_message_ = message;
+  recv_message_->Clear();
 }
 
 void CallOpBuffer::AddClientSendClose() { client_send_close_ = true; }
@@ -253,8 +255,8 @@ void CallOpBuffer::FinalizeResult(void** tag, bool* status) {
   // Parse received message if any.
   if (recv_message_) {
     if (recv_message_buf_) {
-      got_message = true;
+      got_message = *status;
-      *status = DeserializeProto(recv_message_buf_, recv_message_);
+      *status = *status && DeserializeProto(recv_message_buf_, recv_message_);
       grpc_byte_buffer_destroy(recv_message_buf_);
       recv_message_buf_ = nullptr;
     } else {

src/cpp/server/server.cc

@@ -314,7 +314,7 @@ class Server::AsyncRequest final : public CompletionQueueTag {
     *tag = tag_;
     if (*status && request_) {
       if (payload_) {
-        *status = DeserializeProto(payload_, request_);
+        *status = *status && DeserializeProto(payload_, request_);
       } else {
         *status = false;
       }