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#pragma once
#include "grpc_server.h"
namespace NGrpc {
enum class EQueueEventStatus {
OK,
ERROR
};
template<class TCallback>
class TQueueEventCallback: public IQueueEvent {
public:
TQueueEventCallback(const TCallback& callback)
: Callback(callback)
{}
TQueueEventCallback(TCallback&& callback)
: Callback(std::move(callback))
{}
bool Execute(bool ok) override {
Callback(ok ? EQueueEventStatus::OK : EQueueEventStatus::ERROR);
return false;
}
void DestroyRequest() override {
delete this;
}
private:
TCallback Callback;
};
// Implementation of IQueueEvent that reduces allocations
template<class TSelf>
class TQueueFixedEvent: private IQueueEvent {
using TCallback = void (TSelf::*)(EQueueEventStatus);
public:
TQueueFixedEvent(TSelf* self, TCallback callback)
: Self(self)
, Callback(callback)
{ }
IQueueEvent* Prepare() {
Self->Ref();
return this;
}
private:
bool Execute(bool ok) override {
((*Self).*Callback)(ok ? EQueueEventStatus::OK : EQueueEventStatus::ERROR);
return false;
}
void DestroyRequest() override {
Self->UnRef();
}
private:
TSelf* const Self;
TCallback const Callback;
};
template<class TCallback>
inline IQueueEvent* MakeQueueEventCallback(TCallback&& callback) {
return new TQueueEventCallback<TCallback>(std::forward<TCallback>(callback));
}
template<class T>
inline IQueueEvent* MakeQueueEventCallback(T* self, void (T::*method)(EQueueEventStatus)) {
using TPtr = TIntrusivePtr<T>;
return MakeQueueEventCallback([self = TPtr(self), method] (EQueueEventStatus status) {
((*self).*method)(status);
});
}
} // namespace NGrpc
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