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#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;
};
}
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