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#include "mkql_stats_registry.h"
#include <util/generic/yexception.h>
#include <util/generic/vector.h>
#include <util/generic/hash_set.h>
#include <util/generic/singleton.h>
namespace NKikimr {
namespace NMiniKQL {
namespace {
/**
* vector based implementation of stats registry
*/
class TDefaultStatsRegistry: public IStatsRegistry {
public:
i64 GetStat(const TStatKey& key) const override {
return key.GetId() < Values_.size() ? Values_[key.GetId()] : 0;
}
void SetStat(const TStatKey& key, i64 value) override {
EnsureSize(key);
Values_[key.GetId()] = value;
}
void SetMaxStat(const TStatKey& key, i64 value) override {
EnsureSize(key);
i64& oldValue = Values_[key.GetId()];
oldValue = Max(value, oldValue);
}
void SetMinStat(const TStatKey& key, i64 value) override {
EnsureSize(key);
i64& oldValue = Values_[key.GetId()];
oldValue = Min(value, oldValue);
}
void AddStat(const TStatKey& key, i64 value) override {
EnsureSize(key);
Values_[key.GetId()] += value;
}
private:
void EnsureSize(const TStatKey& key) {
if (Y_UNLIKELY(Values_.size() <= key.GetId())) {
Values_.resize(key.GetId() + 10); // try to avoid too often resizing
}
}
private:
TVector<i64> Values_;
};
/**
* Key names set to prevent keys accidental duplication.
*/
class TKeyNames: private THashSet<TStringBuf> {
public:
bool AddIfNotExists(TStringBuf name) {
return insert(name).second;
}
};
} // namespace
ui32 TStatKey::IdSequence_ = 0;
TStatKey* TStatKey::KeysChain_ = nullptr;
TStatKey::TStatKey(TStringBuf name, bool deriv)
: Name_(name)
, Deriv_(deriv)
, Id_(IdSequence_++)
{
bool newOne = Singleton<TKeyNames>()->AddIfNotExists(name);
Y_ENSURE(newOne, "duplicated stat key: " << name);
SetNext(KeysChain_);
KeysChain_ = this;
}
IStatsRegistryPtr CreateDefaultStatsRegistry() {
return new TDefaultStatsRegistry;
}
} // namespace NMiniKQL
} // namespace NKikimr
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