diff options
author | ncteisen <ncteisen@gmail.com> | 2017-10-31 13:13:03 -0700 |
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committer | ncteisen <ncteisen@gmail.com> | 2017-10-31 13:15:27 -0700 |
commit | 023726202a0ec2b30f61561e0b990706ed04d578 (patch) | |
tree | 50ca3893d12c34635eabd19fb2faec23ff880653 /include/grpc++ | |
parent | 0f598690014ce3db4ae4d5e4a690acf6d655f128 (diff) |
Refactor SerializationTraits
Diffstat (limited to 'include/grpc++')
-rw-r--r-- | include/grpc++/impl/codegen/config_protobuf.h | 2 | ||||
-rw-r--r-- | include/grpc++/impl/codegen/core_codegen.h | 1 | ||||
-rw-r--r-- | include/grpc++/impl/codegen/core_codegen_interface.h | 1 | ||||
-rw-r--r-- | include/grpc++/impl/codegen/proto_utils.h | 112 |
4 files changed, 74 insertions, 42 deletions
diff --git a/include/grpc++/impl/codegen/config_protobuf.h b/include/grpc++/impl/codegen/config_protobuf.h index c5e5bdf0db..7387fa25c6 100644 --- a/include/grpc++/impl/codegen/config_protobuf.h +++ b/include/grpc++/impl/codegen/config_protobuf.h @@ -19,6 +19,8 @@ #ifndef GRPCXX_IMPL_CODEGEN_CONFIG_PROTOBUF_H #define GRPCXX_IMPL_CODEGEN_CONFIG_PROTOBUF_H +#define GRPC_OPEN_SOURCE_PROTO + #ifndef GRPC_CUSTOM_PROTOBUF_INT64 #include <google/protobuf/stubs/common.h> #define GRPC_CUSTOM_PROTOBUF_INT64 ::google::protobuf::int64 diff --git a/include/grpc++/impl/codegen/core_codegen.h b/include/grpc++/impl/codegen/core_codegen.h index c751c1e734..1abf07d125 100644 --- a/include/grpc++/impl/codegen/core_codegen.h +++ b/include/grpc++/impl/codegen/core_codegen.h @@ -89,6 +89,7 @@ class CoreCodegen final : public CoreCodegenInterface { grpc_slice grpc_slice_ref(grpc_slice slice) override; grpc_slice grpc_slice_split_tail(grpc_slice* s, size_t split) override; grpc_slice grpc_slice_split_head(grpc_slice* s, size_t split) override; + grpc_slice grpc_slice_sub(grpc_slice s, size_t begin, size_t end) override; void grpc_slice_buffer_add(grpc_slice_buffer* sb, grpc_slice slice) override; void grpc_slice_buffer_pop(grpc_slice_buffer* sb) override; grpc_slice grpc_slice_from_static_buffer(const void* buffer, diff --git a/include/grpc++/impl/codegen/core_codegen_interface.h b/include/grpc++/impl/codegen/core_codegen_interface.h index a4c50dab87..62ba3f1ff8 100644 --- a/include/grpc++/impl/codegen/core_codegen_interface.h +++ b/include/grpc++/impl/codegen/core_codegen_interface.h @@ -103,6 +103,7 @@ class CoreCodegenInterface { virtual grpc_slice grpc_slice_ref(grpc_slice slice) = 0; virtual grpc_slice grpc_slice_split_tail(grpc_slice* s, size_t split) = 0; virtual grpc_slice grpc_slice_split_head(grpc_slice* s, size_t split) = 0; + virtual grpc_slice grpc_slice_sub(grpc_slice s, size_t begin, size_t end) = 0; virtual void grpc_slice_buffer_add(grpc_slice_buffer* sb, grpc_slice slice) = 0; virtual void grpc_slice_buffer_pop(grpc_slice_buffer* sb) = 0; diff --git a/include/grpc++/impl/codegen/proto_utils.h b/include/grpc++/impl/codegen/proto_utils.h index 67e8f71a89..4a2857488c 100644 --- a/include/grpc++/impl/codegen/proto_utils.h +++ b/include/grpc++/impl/codegen/proto_utils.h @@ -39,8 +39,7 @@ 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) { @@ -88,6 +87,8 @@ 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_; @@ -98,8 +99,7 @@ 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_() { @@ -160,7 +160,7 @@ class GrpcBufferReader final return byte_count_ - backup_count_; } - private: + protected: int64_t byte_count_; int64_t backup_count_; grpc_byte_buffer_reader reader_; @@ -168,57 +168,85 @@ class GrpcBufferReader final Status status_; }; +// BufferWriter must be a subclass of io::ZeroCopyOutputStream. +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 <= 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, kGrpcBufferWriterMaxBufferLength); + return msg.SerializeToZeroCopyStream(&writer) + ? g_core_codegen_interface->ok() + : Status(StatusCode::INTERNAL, "Failed to serialize message"); + } +} + +// BufferReader must be a subclass of io::ZeroCopyInputStream. +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 |