diff options
author | Muxi Yan <muxi@users.noreply.github.com> | 2017-05-12 12:25:43 -0700 |
---|---|---|
committer | GitHub <noreply@github.com> | 2017-05-12 12:25:43 -0700 |
commit | 04f97ca02282cd57fdc65fe798f94feb94c2d554 (patch) | |
tree | f9f638167c2116a57bd65434c172853f78d7da7f /include/grpc++/impl/codegen/proto_utils.h | |
parent | c8a6822b0e0afa53b2ec4c92610f7175e4be5127 (diff) | |
parent | a2d9d48a888bf9162d1288496e60920b481bf3eb (diff) |
Merge branch 'master' into backward-compat-dev
Diffstat (limited to 'include/grpc++/impl/codegen/proto_utils.h')
-rw-r--r-- | include/grpc++/impl/codegen/proto_utils.h | 111 |
1 files changed, 69 insertions, 42 deletions
diff --git a/include/grpc++/impl/codegen/proto_utils.h b/include/grpc++/impl/codegen/proto_utils.h index 8c0c32bfc5..5cdb2a7a15 100644 --- a/include/grpc++/impl/codegen/proto_utils.h +++ b/include/grpc++/impl/codegen/proto_utils.h @@ -54,8 +54,7 @@ class GrpcBufferWriterPeer; const int kGrpcBufferWriterMaxBufferLength = 1024 * 1024; -class GrpcBufferWriter final - : public ::grpc::protobuf::io::ZeroCopyOutputStream { +class GrpcBufferWriter : public ::grpc::protobuf::io::ZeroCopyOutputStream { public: explicit GrpcBufferWriter(grpc_byte_buffer** bp, int block_size) : block_size_(block_size), byte_count_(0), have_backup_(false) { @@ -103,6 +102,8 @@ class GrpcBufferWriter final grpc::protobuf::int64 ByteCount() const override { return byte_count_; } + grpc_slice_buffer* SliceBuffer() { return slice_buffer_; } + private: friend class GrpcBufferWriterPeer; const int block_size_; @@ -113,8 +114,7 @@ class GrpcBufferWriter final grpc_slice slice_; }; -class GrpcBufferReader final - : public ::grpc::protobuf::io::ZeroCopyInputStream { +class GrpcBufferReader : public ::grpc::protobuf::io::ZeroCopyInputStream { public: explicit GrpcBufferReader(grpc_byte_buffer* buffer) : byte_count_(0), backup_count_(0), status_() { @@ -175,64 +175,91 @@ class GrpcBufferReader final return byte_count_ - backup_count_; } - private: + protected: int64_t byte_count_; int64_t backup_count_; grpc_byte_buffer_reader reader_; grpc_slice slice_; Status status_; }; + +template <class BufferWriter, class T> +Status GenericSerialize(const grpc::protobuf::Message& msg, + grpc_byte_buffer** bp, bool* own_buffer) { + static_assert( + std::is_base_of<protobuf::io::ZeroCopyOutputStream, BufferWriter>::value, + "BufferWriter must be a subclass of io::ZeroCopyOutputStream"); + *own_buffer = true; + int byte_size = msg.ByteSize(); + if (byte_size <= internal::kGrpcBufferWriterMaxBufferLength) { + grpc_slice slice = g_core_codegen_interface->grpc_slice_malloc(byte_size); + GPR_CODEGEN_ASSERT( + GRPC_SLICE_END_PTR(slice) == + msg.SerializeWithCachedSizesToArray(GRPC_SLICE_START_PTR(slice))); + *bp = g_core_codegen_interface->grpc_raw_byte_buffer_create(&slice, 1); + g_core_codegen_interface->grpc_slice_unref(slice); + return g_core_codegen_interface->ok(); + } else { + BufferWriter writer(bp, internal::kGrpcBufferWriterMaxBufferLength); + return msg.SerializeToZeroCopyStream(&writer) + ? g_core_codegen_interface->ok() + : Status(StatusCode::INTERNAL, "Failed to serialize message"); + } +} + +template <class BufferReader, class T> +Status GenericDeserialize(grpc_byte_buffer* buffer, + grpc::protobuf::Message* msg) { + static_assert( + std::is_base_of<protobuf::io::ZeroCopyInputStream, BufferReader>::value, + "BufferReader must be a subclass of io::ZeroCopyInputStream"); + if (buffer == nullptr) { + return Status(StatusCode::INTERNAL, "No payload"); + } + Status result = g_core_codegen_interface->ok(); + { + BufferReader reader(buffer); + if (!reader.status().ok()) { + return reader.status(); + } + ::grpc::protobuf::io::CodedInputStream decoder(&reader); + decoder.SetTotalBytesLimit(INT_MAX, INT_MAX); + if (!msg->ParseFromCodedStream(&decoder)) { + result = Status(StatusCode::INTERNAL, msg->InitializationErrorString()); + } + if (!decoder.ConsumedEntireMessage()) { + result = Status(StatusCode::INTERNAL, "Did not read entire message"); + } + } + g_core_codegen_interface->grpc_byte_buffer_destroy(buffer); + return result; +} + } // namespace internal +// this is needed so the following class does not conflict with protobuf +// serializers that utilize internal-only tools. +#ifdef GRPC_OPEN_SOURCE_PROTO +// This class provides a protobuf serializer. It translates between protobuf +// objects and grpc_byte_buffers. More information about SerializationTraits can +// be found in include/grpc++/impl/codegen/serialization_traits.h. template <class T> class SerializationTraits<T, typename std::enable_if<std::is_base_of< grpc::protobuf::Message, T>::value>::type> { public: static Status Serialize(const grpc::protobuf::Message& msg, grpc_byte_buffer** bp, bool* own_buffer) { - *own_buffer = true; - int byte_size = msg.ByteSize(); - if (byte_size <= internal::kGrpcBufferWriterMaxBufferLength) { - grpc_slice slice = g_core_codegen_interface->grpc_slice_malloc(byte_size); - GPR_CODEGEN_ASSERT( - GRPC_SLICE_END_PTR(slice) == - msg.SerializeWithCachedSizesToArray(GRPC_SLICE_START_PTR(slice))); - *bp = g_core_codegen_interface->grpc_raw_byte_buffer_create(&slice, 1); - g_core_codegen_interface->grpc_slice_unref(slice); - return g_core_codegen_interface->ok(); - } else { - internal::GrpcBufferWriter writer( - bp, internal::kGrpcBufferWriterMaxBufferLength); - return msg.SerializeToZeroCopyStream(&writer) - ? g_core_codegen_interface->ok() - : Status(StatusCode::INTERNAL, "Failed to serialize message"); - } + return internal::GenericSerialize<internal::GrpcBufferWriter, T>( + msg, bp, own_buffer); } static Status Deserialize(grpc_byte_buffer* buffer, grpc::protobuf::Message* msg) { - if (buffer == nullptr) { - return Status(StatusCode::INTERNAL, "No payload"); - } - Status result = g_core_codegen_interface->ok(); - { - internal::GrpcBufferReader reader(buffer); - if (!reader.status().ok()) { - return reader.status(); - } - ::grpc::protobuf::io::CodedInputStream decoder(&reader); - decoder.SetTotalBytesLimit(INT_MAX, INT_MAX); - if (!msg->ParseFromCodedStream(&decoder)) { - result = Status(StatusCode::INTERNAL, msg->InitializationErrorString()); - } - if (!decoder.ConsumedEntireMessage()) { - result = Status(StatusCode::INTERNAL, "Did not read entire message"); - } - } - g_core_codegen_interface->grpc_byte_buffer_destroy(buffer); - return result; + return internal::GenericDeserialize<internal::GrpcBufferReader, T>(buffer, + msg); } }; +#endif } // namespace grpc |