intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 233 insertions, 0 deletions

diff --git a/library/cpp/messagebus/protobuf/ybusbuf.h b/library/cpp/messagebus/protobuf/ybusbuf.h
new file mode 100644
index 0000000000..57b4267ea5
--- /dev/null
+++ b/library/cpp/messagebus/protobuf/ybusbuf.h
@@ -0,0 +1,233 @@
+#pragma once
+
+#include <library/cpp/messagebus/ybus.h>
+
+#include <google/protobuf/descriptor.h>
+#include <google/protobuf/message.h>
+
+#include <util/generic/cast.h>
+#include <util/generic/vector.h>
+#include <util/stream/mem.h>
+
+#include <array>
+
+namespace NBus {
+    using TBusBufferRecord = ::google::protobuf::Message;
+
+    template <class TBufferMessage>
+    class TBusBufferMessagePtr;
+    template <class TBufferMessage>
+    class TBusBufferMessageAutoPtr;
+
+    class TBusBufferBase: public TBusMessage {
+    public:
+        TBusBufferBase(int type)
+            : TBusMessage((ui16)type)
+        {
+        }
+        TBusBufferBase(ECreateUninitialized)
+            : TBusMessage(MESSAGE_CREATE_UNINITIALIZED)
+        {
+        }
+
+        ui16 GetType() const {
+            return GetHeader()->Type;
+        }
+
+        virtual TBusBufferRecord* GetRecord() const = 0;
+        virtual TBusBufferBase* New() = 0;
+    };
+
+    ///////////////////////////////////////////////////////////////////
+    /// \brief Template for all messages that have protobuf description
+
+    /// @param TBufferRecord is record described in .proto file with namespace
+    /// @param MessageFile is offset for .proto file message ids
+
+    /// \attention If you want one protocol NBus::TBusBufferProtocol to handle
+    /// messageges described in different .proto files, make sure that they have
+    /// unique values for MessageFile
+
+    template <class TBufferRecord, int MType>
+    class TBusBufferMessage: public TBusBufferBase {
+    public:
+        static const int MessageType = MType;
+
+        typedef TBusBufferMessagePtr<TBusBufferMessage<TBufferRecord, MType>> TPtr;
+        typedef TBusBufferMessageAutoPtr<TBusBufferMessage<TBufferRecord, MType>> TAutoPtr;
+
+    public:
+        typedef TBufferRecord RecordType;
+        TBufferRecord Record;
+
+    public:
+        TBusBufferMessage()
+            : TBusBufferBase(MessageType)
+        {
+        }
+        TBusBufferMessage(ECreateUninitialized)
+            : TBusBufferBase(MESSAGE_CREATE_UNINITIALIZED)
+        {
+        }
+        explicit TBusBufferMessage(const TBufferRecord& record)
+            : TBusBufferBase(MessageType)
+            , Record(record)
+        {
+        }
+        explicit TBusBufferMessage(TBufferRecord&& record)
+            : TBusBufferBase(MessageType)
+            , Record(std::move(record))
+        {
+        }
+
+    public:
+        TBusBufferRecord* GetRecord() const override {
+            return (TBusBufferRecord*)&Record;
+        }
+        TBusBufferBase* New() override {
+            return new TBusBufferMessage<TBufferRecord, MessageType>();
+        }
+    };
+
+    template <class TSelf, class TBufferMessage>
+    class TBusBufferMessagePtrBase {
+    public:
+        typedef typename TBufferMessage::RecordType RecordType;
+
+    private:
+        TSelf* GetSelf() {
+            return static_cast<TSelf*>(this);
+        }
+        const TSelf* GetSelf() const {
+            return static_cast<const TSelf*>(this);
+        }
+
+    public:
+        RecordType* operator->() {
+            Y_ASSERT(GetSelf()->Get());
+            return &(GetSelf()->Get()->Record);
+        }
+        const RecordType* operator->() const {
+            Y_ASSERT(GetSelf()->Get());
+            return &(GetSelf()->Get()->Record);
+        }
+        RecordType& operator*() {
+            Y_ASSERT(GetSelf()->Get());
+            return GetSelf()->Get()->Record;
+        }
+        const RecordType& operator*() const {
+            Y_ASSERT(GetSelf()->Get());
+            return GetSelf()->Get()->Record;
+        }
+
+        TBusHeader* GetHeader() {
+            return GetSelf()->Get()->GetHeader();
+        }
+        const TBusHeader* GetHeader() const {
+            return GetSelf()->Get()->GetHeader();
+        }
+    };
+
+    template <class TBufferMessage>
+    class TBusBufferMessagePtr: public TBusBufferMessagePtrBase<TBusBufferMessagePtr<TBufferMessage>, TBufferMessage> {
+    protected:
+        TBufferMessage* Holder;
+
+    public:
+        TBusBufferMessagePtr(TBufferMessage* mess)
+            : Holder(mess)
+        {
+        }
+        static TBusBufferMessagePtr<TBufferMessage> DynamicCast(TBusMessage* message) {
+            return dynamic_cast<TBufferMessage*>(message);
+        }
+        TBufferMessage* Get() {
+            return Holder;
+        }
+        const TBufferMessage* Get() const {
+            return Holder;
+        }
+
+        operator TBufferMessage*() {
+            return Holder;
+        }
+        operator const TBufferMessage*() const {
+            return Holder;
+        }
+
+        operator TAutoPtr<TBusMessage>() {
+            TAutoPtr<TBusMessage> r(Holder);
+            Holder = 0;
+            return r;
+        }
+        operator TBusMessageAutoPtr() {
+            TBusMessageAutoPtr r(Holder);
+            Holder = nullptr;
+            return r;
+        }
+    };
+
+    template <class TBufferMessage>
+    class TBusBufferMessageAutoPtr: public TBusBufferMessagePtrBase<TBusBufferMessageAutoPtr<TBufferMessage>, TBufferMessage> {
+    public:
+        TAutoPtr<TBufferMessage> AutoPtr;
+
+    public:
+        TBusBufferMessageAutoPtr() {
+        }
+        TBusBufferMessageAutoPtr(TBufferMessage* message)
+            : AutoPtr(message)
+        {
+        }
+
+        TBufferMessage* Get() {
+            return AutoPtr.Get();
+        }
+        const TBufferMessage* Get() const {
+            return AutoPtr.Get();
+        }
+
+        TBufferMessage* Release() const {
+            return AutoPtr.Release();
+        }
+
+        operator TAutoPtr<TBusMessage>() {
+            return AutoPtr.Release();
+        }
+        operator TBusMessageAutoPtr() {
+            return AutoPtr.Release();
+        }
+    };
+
+    /////////////////////////////////////////////
+    /// \brief Generic protocol object for messages descibed with protobuf
+
+    /// \attention If you mix messages in the same protocol from more than
+    /// .proto file make sure that they have different MessageFile parameter
+    ///  in the NBus::TBusBufferMessage template
+
+    class TBusBufferProtocol: public TBusProtocol {
+    private:
+        TVector<TBusBufferBase*> Types;
+        std::array<ui32, ((1 << 16) >> 5)> TypeMask;
+
+        TBusBufferBase* FindType(int type);
+        bool IsRegisteredType(unsigned type);
+
+    public:
+        TBusBufferProtocol(TBusService name, int port);
+
+        ~TBusBufferProtocol() override;
+
+        /// register all the message that this protocol should handle
+        void RegisterType(TAutoPtr<TBusBufferBase> mess);
+
+        TArrayRef<TBusBufferBase* const> GetTypes() const;
+
+        /// serialized protocol specific data into TBusData
+        void Serialize(const TBusMessage* mess, TBuffer& data) override;
+
+        TAutoPtr<TBusMessage> Deserialize(ui16 messageType, TArrayRef<const char> payload) override;
+    };
+
+}