Client side compiles/links

include/grpc++/async_unary_call.h

@@ -63,7 +63,8 @@ class ClientAsyncResponseReader GRPC_FINAL
                             const W& request)
       : context_(context), call_(channel->CreateCall(method, context, cq)) {
     init_buf_.SendInitialMetadata(context->send_initial_metadata_);
-    init_buf_.SendMessage(request);
+    // TODO(ctiller): don't assert
+    GPR_ASSERT(init_buf_.SendMessage(request));
     init_buf_.ClientSendClose();
     call_.PerformOps(&init_buf_);
   }
@@ -117,10 +118,11 @@ class ServerAsyncResponseWriter GRPC_FINAL
       ctx_->sent_initial_metadata_ = true;
     }
     // The response is dropped if the status is not OK.
-    if (status.IsOk()) {
+    if (status.IsOk() && !finish_buf_.SendMessage(msg)) {
-      finish_buf_.SendMessage(msg);
+      finish_buf_.ServerSendStatus(ctx_->trailing_metadata_, Status(INVALID_ARGUMENT, "Failed to serialize message"));
-    }
+    } else {
       finish_buf_.ServerSendStatus(ctx_->trailing_metadata_, status);
+    }
     call_.PerformOps(&finish_buf_);
   }
 

include/grpc++/byte_buffer.h

@@ -62,6 +62,12 @@ class ByteBuffer GRPC_FINAL {
   void Clear();
   size_t Length();
 
+ private:
+  friend class SerializationTraits<ByteBuffer, void>;
+
+  ByteBuffer(const ByteBuffer&);
+  ByteBuffer& operator=(const ByteBuffer&);
+
   // takes ownership
   void set_buffer(grpc_byte_buffer* buf) {
     if (buffer_) {
@@ -71,9 +77,6 @@ class ByteBuffer GRPC_FINAL {
     buffer_ = buf;
   }
 
- private:
-  friend class CallOpBuffer;
-
   grpc_byte_buffer* buffer() const { return buffer_; }
 
   grpc_byte_buffer* buffer_;
@@ -86,6 +89,10 @@ class SerializationTraits<ByteBuffer, void> {
     dest->set_buffer(byte_buffer);
     return Status::OK;
   }
+  static bool Serialize(const ByteBuffer& source, grpc_byte_buffer** buffer) {
+    *buffer = source.buffer();
+    return true;
+  }
 };
 
 }  // namespace grpc

include/grpc++/client_context.h

@@ -48,7 +48,6 @@ struct grpc_completion_queue;
 
 namespace grpc {
 
-class CallOpBuffer;
 class ChannelInterface;
 class CompletionQueue;
 class Credentials;
@@ -115,7 +114,8 @@ class ClientContext {
   ClientContext(const ClientContext&);
   ClientContext& operator=(const ClientContext&);
 
-  friend class CallOpBuffer;
+  friend class CallOpClientRecvStatus;
+  friend class CallOpRecvInitialMetadata;
   friend class Channel;
   template <class R>
   friend class ::grpc::ClientReader;

include/grpc++/impl/call.h

@@ -35,6 +35,7 @@
 #define GRPCXX_IMPL_CALL_H
 
 #include <grpc/grpc.h>
+#include <grpc++/client_context.h>
 #include <grpc++/completion_queue.h>
 #include <grpc++/config.h>
 #include <grpc++/status.h>
@@ -51,6 +52,10 @@ namespace grpc {
 class ByteBuffer;
 class Call;
 
+void FillMetadataMap(grpc_metadata_array* arr,
+                     std::multimap<grpc::string, grpc::string>* metadata);
+grpc_metadata* FillMetadataArray(const std::multimap<grpc::string, grpc::string>& metadata);
+
 class CallNoOp {
  protected:
   void AddOp(grpc_op* ops, size_t* nops) {}
@@ -59,11 +64,29 @@ class CallNoOp {
 
 class CallOpSendInitialMetadata {
  public:
-  void SendInitialMetadata(const std::multimap<grpc::string, grpc::string>& metadata);
+  CallOpSendInitialMetadata() : send_(false) {}
+
+  void SendInitialMetadata(const std::multimap<grpc::string, grpc::string>& metadata) {
+    send_ = true;
+    initial_metadata_count_ = metadata.size();
+    initial_metadata_ = FillMetadataArray(metadata);
+  }
 
  protected:
-  void AddOp(grpc_op* ops, size_t* nops);
+  void AddOp(grpc_op* ops, size_t* nops) {
-  void FinishOp(void* tag, bool* status, int max_message_size);
+    if (!send_) return;
+    grpc_op* op = &ops[(*nops)++];
+    op->op = GRPC_OP_SEND_INITIAL_METADATA;
+    op->data.send_initial_metadata.count = initial_metadata_count_;
+    op->data.send_initial_metadata.metadata = initial_metadata_;
+  }
+  void FinishOp(void* tag, bool* status, int max_message_size) {
+    // nothing to do
+  }
+
+  bool send_;
+  size_t initial_metadata_count_;
+  grpc_metadata* initial_metadata_;
 };
 
 class CallOpSendMessage {
@@ -71,7 +94,7 @@ class CallOpSendMessage {
   CallOpSendMessage() : send_buf_(nullptr) {}
 
   template <class M>
-  bool SendMessage(const M& message) {
+  bool SendMessage(const M& message) GRPC_MUST_USE_RESULT {
     return SerializationTraits<M>::Serialize(message, &send_buf_);
   }
 
@@ -132,50 +155,167 @@ class CallOpRecvMessage {
 
 class CallOpGenericRecvMessage {
  public:
+  CallOpGenericRecvMessage() : got_message(false) {}
+
   template <class R>
-  void RecvMessage(R* message);
+  void RecvMessage(R* message) {
+    deserialize_ = [message](grpc_byte_buffer* buf, int max_message_size) -> Status {
+      return SerializationTraits<R>::Deserialize(buf, message, max_message_size);
+    };
+  }
 
   bool got_message;
 
  protected:
-  void AddOp(grpc_op* ops, size_t* nops);
+  void AddOp(grpc_op* ops, size_t* nops) {
-  void FinishOp(void* tag, bool* status, int max_message_size);
+    if (!deserialize_) return;
+    grpc_op *op = &ops[(*nops)++];
+    op->op = GRPC_OP_RECV_MESSAGE;
+    op->data.recv_message = &recv_buf_;
+  }
+
+  void FinishOp(void* tag, bool* status, int max_message_size) {
+    if (!deserialize_) return;
+    if (recv_buf_) {
+      if (*status) {
+        got_message = true;
+        *status = deserialize_(recv_buf_, max_message_size).IsOk();
+      } else {
+        got_message = false;
+        grpc_byte_buffer_destroy(recv_buf_);
+      }
+    } else {
+      got_message = false;
+      *status = false;
+    }
+  }
+
+ private:
+  std::function<Status(grpc_byte_buffer*, int)> deserialize_;
+  grpc_byte_buffer* recv_buf_;
 };
 
 class CallOpClientSendClose {
  public:
-  void ClientSendClose();
+  CallOpClientSendClose() : send_(false) {}
+
+  void ClientSendClose() { send_ = true; }
 
  protected:
-  void AddOp(grpc_op* ops, size_t* nops);
+  void AddOp(grpc_op* ops, size_t* nops) {
-  void FinishOp(void* tag, bool* status, int max_message_size);
+    if (!send_) return;
+    ops[(*nops)++].op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
+  }
+  void FinishOp(void* tag, bool* status, int max_message_size) {
+    // nothing to do
+  }
+
+ private:
+  bool send_;
 };
 
 class CallOpServerSendStatus {
  public:
-  void ServerSendStatus(const std::multimap<grpc::string, grpc::string>& trailing_metadata, const Status& status);
+  CallOpServerSendStatus() : send_status_available_(false) {}
+
+  void ServerSendStatus(const std::multimap<grpc::string, grpc::string>& trailing_metadata, const Status& status){
+    trailing_metadata_count_ = trailing_metadata.size();
+    trailing_metadata_ = FillMetadataArray(trailing_metadata);
+    send_status_available_ = true;
+    send_status_code_ = static_cast<grpc_status_code>(status.code());
+    send_status_details_ = status.details();
+  }
 
  protected:
-  void AddOp(grpc_op* ops, size_t* nops);
+  void AddOp(grpc_op* ops, size_t* nops) {
-  void FinishOp(void* tag, bool* status, int max_message_size);
+    grpc_op* op = &ops[(*nops)++];
+    op->op = GRPC_OP_SEND_STATUS_FROM_SERVER;
+    op->data.send_status_from_server.trailing_metadata_count =
+        trailing_metadata_count_;
+    op->data.send_status_from_server.trailing_metadata =
+        trailing_metadata_;
+    op->data.send_status_from_server.status = send_status_code_;
+    op->data.send_status_from_server.status_details =
+        send_status_details_.empty() ? nullptr : send_status_details_.c_str();
+  }
+
+  void FinishOp(void* tag, bool* status, int max_message_size) {
+    // nothing to do
+  }
+
+ private:
+  bool send_status_available_;
+  grpc_status_code send_status_code_;
+  grpc::string send_status_details_;
+  size_t trailing_metadata_count_;
+  grpc_metadata* trailing_metadata_;
 };
 
 class CallOpRecvInitialMetadata {
  public:
-  void RecvInitialMetadata(ClientContext* context);
+  CallOpRecvInitialMetadata() : recv_initial_metadata_(nullptr) {
+    memset(&recv_initial_metadata_arr_, 0, sizeof(recv_initial_metadata_arr_));
+  }
+
+  void RecvInitialMetadata(ClientContext* context) {
+    context->initial_metadata_received_ = true;
+    recv_initial_metadata_ = &context->recv_initial_metadata_;
+  }
 
  protected:
-  void AddOp(grpc_op* ops, size_t* nops);
+  void AddOp(grpc_op* ops, size_t* nops) {
-  void FinishOp(void* tag, bool* status, int max_message_size);
+    if (!recv_initial_metadata_) return;
+    grpc_op* op = &ops[(*nops)++];
+    op->op = GRPC_OP_RECV_INITIAL_METADATA;
+    op->data.recv_initial_metadata = &recv_initial_metadata_arr_;
+  }
+  void FinishOp(void* tag, bool* status, int max_message_size) {
+    FillMetadataMap(&recv_initial_metadata_arr_, recv_initial_metadata_);
+  }
+
+ private:
+  std::multimap<grpc::string, grpc::string>* recv_initial_metadata_;
+  grpc_metadata_array recv_initial_metadata_arr_;
 };
 
 class CallOpClientRecvStatus {
  public:
-  void ClientRecvStatus(ClientContext* context, Status* status);
+  CallOpClientRecvStatus() {
+    memset(this, 0, sizeof(*this));
+  }
+
+  void ClientRecvStatus(ClientContext* context, Status* status) {
+    recv_trailing_metadata_ = &context->trailing_metadata_;
+    recv_status_ = status;
+  }
 
  protected:
-  void AddOp(grpc_op* ops, size_t* nops);
+  void AddOp(grpc_op* ops, size_t* nops) {
-  void FinishOp(void* tag, bool* status, int max_message_size);
+    if (recv_status_ == nullptr) return;
+    grpc_op* op = &ops[(*nops)++];
+    op->op = GRPC_OP_RECV_STATUS_ON_CLIENT;
+    op->data.recv_status_on_client.trailing_metadata =
+        &recv_trailing_metadata_arr_;
+    op->data.recv_status_on_client.status = &status_code_;
+    op->data.recv_status_on_client.status_details = &status_details_;
+    op->data.recv_status_on_client.status_details_capacity =
+        &status_details_capacity_;
+  }
+
+  void FinishOp(void* tag, bool* status, int max_message_size) {
+    FillMetadataMap(&recv_trailing_metadata_arr_, recv_trailing_metadata_);
+    *recv_status_ = Status(
+        static_cast<StatusCode>(status_code_),
+        status_details_ ? grpc::string(status_details_) : grpc::string());
+  }
+
+ private:
+  std::multimap<grpc::string, grpc::string>* recv_trailing_metadata_;
+  Status* recv_status_;
+  grpc_metadata_array recv_trailing_metadata_arr_;
+  grpc_status_code status_code_;
+  char* status_details_;
+  size_t status_details_capacity_;
 };
 
 class CallOpSetInterface : public CompletionQueueTag {

include/grpc++/impl/client_unary_call.h

@@ -63,7 +63,9 @@ Status BlockingUnaryCall(ChannelInterface* channel, const RpcMethod& method,
   		CallOpClientRecvStatus> ops;
   Status status;
   ops.SendInitialMetadata(context->send_initial_metadata_);
-  ops.SendMessage(request);
+  if (!ops.SendMessage(request)) {
+    return Status(INVALID_ARGUMENT, "Failed to serialize message");
+  }
   ops.RecvInitialMetadata(context);
   ops.RecvMessage(result);
   ops.ClientSendClose();

include/grpc++/impl/rpc_service_method.h

@@ -89,7 +89,9 @@ class RpcMethodHandler : public MethodHandler {
     CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage, CallOpServerSendStatus> ops;
     ops.SendInitialMetadata(param.server_context->initial_metadata_);
     if (status.IsOk()) {
-      ops.SendMessage(rsp);
+      if (!ops.SendMessage(rsp)) {
+        status = Status(INTERNAL, "Failed to serialize response");
+      }
     }
     ops.ServerSendStatus(param.server_context->trailing_metadata_, status);
     param.call->PerformOps(&ops);
@@ -123,7 +125,9 @@ class ClientStreamingHandler : public MethodHandler {
     CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage, CallOpServerSendStatus> ops;
     ops.SendInitialMetadata(param.server_context->initial_metadata_);
     if (status.IsOk()) {
-      ops.SendMessage(rsp);
+      if (!ops.SendMessage(rsp)) {
+        status = Status(INTERNAL, "Failed to serialize response");
+      }
     }
     ops.ServerSendStatus(param.server_context->trailing_metadata_, status);
     param.call->PerformOps(&ops);

include/grpc++/stream.h

@@ -99,7 +99,8 @@ class ClientReader GRPC_FINAL : public ClientReaderInterface<R> {
       : context_(context), call_(channel->CreateCall(method, context, &cq_)) {
     CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage, CallOpClientSendClose> ops;
     ops.SendInitialMetadata(context->send_initial_metadata_);
-    ops.SendMessage(request);
+    // TODO(ctiller): don't assert
+    GPR_ASSERT(ops.SendMessage(request));
     ops.ClientSendClose();
     call_.PerformOps(&ops);
     cq_.Pluck(&ops);
@@ -169,7 +170,9 @@ class ClientWriter : public ClientWriterInterface<W> {
 
   bool Write(const W& msg) GRPC_OVERRIDE {
     CallOpSet<CallOpSendMessage> ops;
-    ops.SendMessage(msg);
+    if (!ops.SendMessage(msg)) {
+      return false;
+    }
     call_.PerformOps(&ops);
     return cq_.Pluck(&ops);
   }
@@ -245,7 +248,7 @@ class ClientReaderWriter GRPC_FINAL : public ClientReaderWriterInterface<W, R> {
 
   bool Write(const W& msg) GRPC_OVERRIDE {
     CallOpSet<CallOpSendMessage> ops;
-    ops.SendMessage(msg);
+    if (!ops.SendMessage(msg)) return false;
     call_.PerformOps(&ops);
     return cq_.Pluck(&ops);
   }
@@ -316,11 +319,13 @@ class ServerWriter GRPC_FINAL : public WriterInterface<W> {
 
   bool Write(const W& msg) GRPC_OVERRIDE {
     CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage> ops;
+    if (!ops.SendMessage(msg)) {
+      return false;
+    }
     if (!ctx_->sent_initial_metadata_) {
       ops.SendInitialMetadata(ctx_->initial_metadata_);
       ctx_->sent_initial_metadata_ = true;
     }
-    ops.SendMessage(msg);
     call_->PerformOps(&ops);
     return call_->cq()->Pluck(&ops);
   }
@@ -356,11 +361,13 @@ class ServerReaderWriter GRPC_FINAL : public WriterInterface<W>,
 
   bool Write(const W& msg) GRPC_OVERRIDE {
     CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage> ops;
+    if (!ops.SendMessage(msg)) {
+      return false;
+    }
     if (!ctx_->sent_initial_metadata_) {
       ops.SendInitialMetadata(ctx_->initial_metadata_);
       ctx_->sent_initial_metadata_ = true;
     }
-    ops.SendMessage(msg);
     call_->PerformOps(&ops);
     return call_->cq()->Pluck(&ops);
   }
@@ -415,7 +422,8 @@ class ClientAsyncReader GRPC_FINAL : public ClientAsyncReaderInterface<R> {
       : context_(context), call_(channel->CreateCall(method, context, cq)) {
     init_ops_.set_output_tag(tag);
     init_ops_.SendInitialMetadata(context->send_initial_metadata_);
-    init_ops_.SendMessage(request);
+    // TODO(ctiller): don't assert
+    GPR_ASSERT(init_ops_.SendMessage(request));
     init_ops_.ClientSendClose();
     call_.PerformOps(&init_ops_);
   }
@@ -488,7 +496,8 @@ class ClientAsyncWriter GRPC_FINAL : public ClientAsyncWriterInterface<W> {
 
   void Write(const W& msg, void* tag) GRPC_OVERRIDE {
     write_ops_.set_output_tag(tag);
-    write_ops_.SendMessage(msg);
+    // TODO(ctiller): don't assert
+    GPR_ASSERT(write_ops_.SendMessage(msg));
     call_.PerformOps(&write_ops_);
   }
 
@@ -558,7 +567,8 @@ class ClientAsyncReaderWriter GRPC_FINAL
 
   void Write(const W& msg, void* tag) GRPC_OVERRIDE {
     write_ops_.set_output_tag(tag);
-    write_ops_.SendMessage(msg);
+    // TODO(ctiller): don't assert
+    GPR_ASSERT(write_ops_.SendMessage(msg));
     call_.PerformOps(&write_ops_);
   }
 
@@ -617,10 +627,11 @@ class ServerAsyncReader GRPC_FINAL : public ServerAsyncStreamingInterface,
       ctx_->sent_initial_metadata_ = true;
     }
     // The response is dropped if the status is not OK.
-    if (status.IsOk()) {
+    if (status.IsOk() && !finish_ops_.SendMessage(msg)) {
-      finish_ops_.SendMessage(msg);
+      finish_ops_.ServerSendStatus(ctx_->trailing_metadata_, Status(INTERNAL, "Failed to serialize response"));
-    }
+    } else {
       finish_ops_.ServerSendStatus(ctx_->trailing_metadata_, status);
+    }
     call_.PerformOps(&finish_ops_);
   }
 
@@ -667,7 +678,8 @@ class ServerAsyncWriter GRPC_FINAL : public ServerAsyncStreamingInterface,
       write_ops_.SendInitialMetadata(ctx_->initial_metadata_);
       ctx_->sent_initial_metadata_ = true;
     }
-    write_ops_.SendMessage(msg);
+    // TODO(ctiller): don't assert
+    GPR_ASSERT(write_ops_.SendMessage(msg));
     call_.PerformOps(&write_ops_);
   }
 
@@ -721,7 +733,8 @@ class ServerAsyncReaderWriter GRPC_FINAL : public ServerAsyncStreamingInterface,
       write_ops_.SendInitialMetadata(ctx_->initial_metadata_);
       ctx_->sent_initial_metadata_ = true;
     }
-    write_ops_.SendMessage(msg);
+    // TODO(ctiller): don't assert
+    GPR_ASSERT(write_ops_.SendMessage(msg));
     call_.PerformOps(&write_ops_);
   }
 

src/cpp/common/call.cc

@@ -42,6 +42,36 @@
 
 namespace grpc {
 
+void FillMetadataMap(grpc_metadata_array* arr,
+                     std::multimap<grpc::string, grpc::string>* metadata) {
+  for (size_t i = 0; i < arr->count; i++) {
+    // TODO(yangg) handle duplicates?
+    metadata->insert(std::pair<grpc::string, grpc::string>(
+        arr->metadata[i].key,
+        grpc::string(arr->metadata[i].value, arr->metadata[i].value_length)));
+  }
+  grpc_metadata_array_destroy(arr);
+  grpc_metadata_array_init(arr);
+}
+
+// TODO(yangg) if the map is changed before we send, the pointers will be a
+// mess. Make sure it does not happen.
+grpc_metadata* FillMetadataArray(
+    const std::multimap<grpc::string, grpc::string>& metadata) {
+  if (metadata.empty()) {
+    return nullptr;
+  }
+  grpc_metadata* metadata_array =
+      (grpc_metadata*)gpr_malloc(metadata.size() * sizeof(grpc_metadata));
+  size_t i = 0;
+  for (auto iter = metadata.cbegin(); iter != metadata.cend(); ++iter, ++i) {
+    metadata_array[i].key = iter->first.c_str();
+    metadata_array[i].value = iter->second.c_str();
+    metadata_array[i].value_length = iter->second.size();
+  }
+  return metadata_array;
+}
+
 #if 0
 CallOpBuffer::CallOpBuffer()
     : return_tag_(this),
@@ -147,17 +177,6 @@ grpc_metadata* FillMetadataArray(
   return metadata_array;
 }
 
-void FillMetadataMap(grpc_metadata_array* arr,
-                     std::multimap<grpc::string, grpc::string>* metadata) {
-  for (size_t i = 0; i < arr->count; i++) {
-    // TODO(yangg) handle duplicates?
-    metadata->insert(std::pair<grpc::string, grpc::string>(
-        arr->metadata[i].key,
-        grpc::string(arr->metadata[i].value, arr->metadata[i].value_length)));
-  }
-  grpc_metadata_array_destroy(arr);
-  grpc_metadata_array_init(arr);
-}
 }  // namespace
 
 void CallOpBuffer::AddSendInitialMetadata(

test/cpp/end2end/generic_end2end_test.cc

@@ -33,10 +33,10 @@
 
 #include <memory>
 
-#include "src/cpp/proto/proto_utils.h"
 #include "test/core/util/port.h"
 #include "test/core/util/test_config.h"
 #include "test/cpp/util/echo.grpc.pb.h"
+#include <grpc++/impl/proto_utils.h>
 #include <grpc++/async_generic_service.h>
 #include <grpc++/async_unary_call.h>
 #include <grpc++/byte_buffer.h>