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[C++] Add grpc/streaming test and fix Deserialize (#4296)

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* [C++] Add delete msg->buf

* [C++] Add grpc streaming test

* Use free instead of delete

* Refactoring grpctest
This commit is contained in:
水樹素子
2017-05-09 05:49:34 +09:00
committed by Wouter van Oortmerssen
parent bbb72f0b73
commit 0920d663d5
2 changed files with 54 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files

71
grpc/tests/grpctest.cpp
View File

@@ -43,11 +43,25 @@ class ServiceImpl final : public MyGame::Example::MonsterStorage::Service {
return grpc::Status::OK; return grpc::Status::OK;
} }
virtual ::grpc::Status Retrieve(::grpc::ServerContext *context, virtual ::grpc::Status Retrieve(::grpc::ServerContext *context,
const flatbuffers::BufferRef<Stat> *request, const flatbuffers::BufferRef<Stat> *request,
::grpc::ServerWriter< flatbuffers::BufferRef<Monster>>* writer) ::grpc::ServerWriter< flatbuffers::BufferRef<Monster>>* writer)
override { override {
assert(false); // We're not actually using this RPC.
return grpc::Status::CANCELLED; for (int i=0; i<10; i++) {
fbb_.Clear();
// Create 10 monsters for resposne.
auto monster_offset =
CreateMonster(fbb_, 0, 0, 0, fbb_.CreateString(
request->GetRoot()->id()->str() + " No." + std::to_string(i)));
fbb_.Finish(monster_offset);
flatbuffers::BufferRef<Monster> monsterRef(
fbb_.GetBufferPointer(), fbb_.GetSize()
);
// Send monster to client using streaming.
writer->Write(monsterRef);
}
return grpc::Status::OK;
} }
private: private:
@@ -93,24 +107,42 @@ int main(int /*argc*/, const char * /*argv*/[]) {
grpc::InsecureChannelCredentials()); grpc::InsecureChannelCredentials());
auto stub = MyGame::Example::MonsterStorage::NewStub(channel); auto stub = MyGame::Example::MonsterStorage::NewStub(channel);
grpc::ClientContext context;
// Build a request with the name set.
flatbuffers::FlatBufferBuilder fbb; flatbuffers::FlatBufferBuilder fbb;
auto monster_offset = CreateMonster(fbb, 0, 0, 0, fbb.CreateString("Fred")); {
fbb.Finish(monster_offset); grpc::ClientContext context;
auto request = flatbuffers::BufferRef<Monster>(fbb.GetBufferPointer(), // Build a request with the name set.
fbb.GetSize()); auto monster_offset = CreateMonster(fbb, 0, 0, 0, fbb.CreateString("Fred"));
flatbuffers::BufferRef<Stat> response; fbb.Finish(monster_offset);
auto request = flatbuffers::BufferRef<Monster>(fbb.GetBufferPointer(),
fbb.GetSize());
flatbuffers::BufferRef<Stat> response;
// The actual RPC. // The actual RPC.
auto status = stub->Store(&context, request, &response); auto status = stub->Store(&context, request, &response);
if (status.ok()) { if (status.ok()) {
auto resp = response.GetRoot()->id(); auto resp = response.GetRoot()->id();
std::cout << "RPC response: " << resp->str() << std::endl; std::cout << "RPC response: " << resp->str() << std::endl;
} else { } else {
std::cout << "RPC failed" << std::endl; std::cout << "RPC failed" << std::endl;
}
}
{
grpc::ClientContext context;
fbb.Clear();
auto stat_offset = CreateStat(fbb, fbb.CreateString("Fred"));
fbb.Finish(stat_offset);
auto request = flatbuffers::BufferRef<Stat>(
fbb.GetBufferPointer(),fbb.GetSize()
);
flatbuffers::BufferRef<Monster> response;
auto stream = stub->Retrieve(&context, request);
while (stream->Read(&response)) {
auto resp = response.GetRoot()->name();
std::cout << "RPC Streaming response: " << resp->str() << std::endl;
}
} }
server_instance->Shutdown(); server_instance->Shutdown();
@@ -121,4 +153,3 @@ int main(int /*argc*/, const char * /*argv*/[]) {
return 0; return 0;
} }

3
include/flatbuffers/grpc.h
View File

@@ -47,6 +47,9 @@ class SerializationTraits<T, typename std::enable_if<std::is_base_of<
static grpc::Status Deserialize(grpc_byte_buffer *buffer, T *msg) { static grpc::Status Deserialize(grpc_byte_buffer *buffer, T *msg) {
// TODO(wvo): make this more efficient / zero copy when possible. // TODO(wvo): make this more efficient / zero copy when possible.
auto len = grpc_byte_buffer_length(buffer); auto len = grpc_byte_buffer_length(buffer);
if(msg->buf != nullptr){
free(msg->buf);
}
msg->buf = reinterpret_cast<uint8_t *>(malloc(len)); msg->buf = reinterpret_cast<uint8_t *>(malloc(len));
msg->len = static_cast<flatbuffers::uoffset_t>(len); msg->len = static_cast<flatbuffers::uoffset_t>(len);
msg->must_free = true; msg->must_free = true;