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#include "inproc.h"
#include "details.h"
#include "neh.h"
#include "location.h"
#include "utils.h"
#include "factory.h"
#include <util/generic/ptr.h>
#include <util/generic/string.h>
#include <util/generic/singleton.h>
#include <util/stream/output.h>
#include <util/string/cast.h>
using namespace NNeh;
namespace {
const TString canceled = "canceled";
struct TInprocHandle: public TNotifyHandle {
inline TInprocHandle(const TMessage& msg, IOnRecv* r, TStatCollector* sc) noexcept
: TNotifyHandle(r, msg, sc)
, Canceled_(false)
, NotifyCnt_(0)
{
}
bool MessageSendedCompletely() const noexcept override {
return true;
}
void Cancel() noexcept override {
THandle::Cancel(); //inform stat collector
Canceled_ = true;
try {
if (MarkReplied()) {
NotifyError(new TError(canceled, TError::Cancelled));
}
} catch (...) {
Cdbg << "inproc canc. " << CurrentExceptionMessage() << Endl;
}
}
inline void SendReply(const TString& resp) {
if (MarkReplied()) {
NotifyResponse(resp);
}
}
inline void SendError(const TString& details) {
if (MarkReplied()) {
NotifyError(new TError{details, TError::ProtocolSpecific, 1});
}
}
void Disable() {
F_ = nullptr;
MarkReplied();
}
inline bool Canceled() const noexcept {
return Canceled_;
}
private:
//return true when mark first reply
inline bool MarkReplied() {
return AtomicAdd(NotifyCnt_, 1) == 1;
}
private:
TAtomicBool Canceled_;
TAtomic NotifyCnt_;
};
typedef TIntrusivePtr<TInprocHandle> TInprocHandleRef;
class TInprocLocation: public TParsedLocation {
public:
TInprocLocation(const TStringBuf& addr)
: TParsedLocation(addr)
{
Service.Split('?', InprocService, InprocId);
}
TStringBuf InprocService;
TStringBuf InprocId;
};
class TRequest: public IRequest {
public:
TRequest(const TInprocHandleRef& hndl)
: Location(hndl->Message().Addr)
, Handle_(hndl)
{
}
TStringBuf Scheme() const override {
return TStringBuf("inproc");
}
TString RemoteHost() const override {
return TString();
}
TStringBuf Service() const override {
return Location.InprocService;
}
TStringBuf Data() const override {
return Handle_->Message().Data;
}
TStringBuf RequestId() const override {
return Location.InprocId;
}
bool Canceled() const override {
return Handle_->Canceled();
}
void SendReply(TData& data) override {
Handle_->SendReply(TString(data.data(), data.size()));
}
void SendError(TResponseError, const TString& details) override {
Handle_->SendError(details);
}
const TMessage Request;
const TInprocLocation Location;
private:
TInprocHandleRef Handle_;
};
class TInprocRequester: public IRequester {
public:
TInprocRequester(IOnRequest*& rqcb)
: RegisteredCallback_(rqcb)
{
}
~TInprocRequester() override {
RegisteredCallback_ = nullptr;
}
private:
IOnRequest*& RegisteredCallback_;
};
class TInprocRequesterStg: public IProtocol {
public:
inline TInprocRequesterStg() {
V_.resize(1 + (size_t)Max<ui16>());
}
IRequesterRef CreateRequester(IOnRequest* cb, const TParsedLocation& loc) override {
IOnRequest*& rqcb = Find(loc);
if (!rqcb) {
rqcb = cb;
} else if (rqcb != cb) {
ythrow yexception() << "shit happen - already registered";
}
return new TInprocRequester(rqcb);
}
THandleRef ScheduleRequest(const TMessage& msg, IOnRecv* fallback, TServiceStatRef& ss) override {
TInprocHandleRef hndl(new TInprocHandle(msg, fallback, !ss ? nullptr : new TStatCollector(ss)));
try {
TAutoPtr<TRequest> req(new TRequest(hndl));
if (IOnRequest* cb = Find(req->Location)) {
cb->OnRequest(req.Release());
} else {
throw yexception() << TStringBuf("not found inproc location");
}
} catch (...) {
hndl->Disable();
throw;
}
return THandleRef(hndl.Get());
}
TStringBuf Scheme() const noexcept override {
return TStringBuf("inproc");
}
private:
static inline ui16 Id(const TParsedLocation& loc) {
return loc.GetPort();
}
inline IOnRequest*& Find(const TParsedLocation& loc) {
return Find(Id(loc));
}
inline IOnRequest*& Find(ui16 id) {
return V_[id];
}
private:
TVector<IOnRequest*> V_;
};
}
IProtocol* NNeh::InProcProtocol() {
return Singleton<TInprocRequesterStg>();
}
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