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#include "udf_log.h"
#include <util/system/mutex.h>
#include <util/generic/hash.h>
#include <util/generic/maybe.h>
#include <util/string/join.h>
namespace NYql {
namespace NUdf {
namespace {
class TNullLogger : public ILogger {
public:
TLogComponentId RegisterComponent(const TStringRef& component) final {
Y_UNUSED(component);
return 0;
}
void SetDefaultLevel(ELogLevel level) final {
Y_UNUSED(level);
}
void SetComponentLevel(TLogComponentId component, ELogLevel level) final {
Y_UNUSED(component);
Y_UNUSED(level);
}
bool IsActive(TLogComponentId component, ELogLevel level) const final {
Y_UNUSED(component);
Y_UNUSED(level);
return false;
}
void Log(TLogComponentId component, ELogLevel level, const TStringRef& message) final {
Y_UNUSED(component);
Y_UNUSED(level);
Y_UNUSED(message);
}
};
class TSynchronizedLogger : public ILogger {
public:
TSynchronizedLogger(const TLoggerPtr& inner)
: Inner_(inner)
{}
TLogComponentId RegisterComponent(const TStringRef& component) final {
with_lock(Mutex_) {
return Inner_->RegisterComponent(component);
}
}
void SetDefaultLevel(ELogLevel level) final {
with_lock(Mutex_) {
Inner_->SetDefaultLevel(level);
}
}
void SetComponentLevel(TLogComponentId component, ELogLevel level) final {
with_lock(Mutex_) {
Inner_->SetComponentLevel(component, level);
}
}
bool IsActive(TLogComponentId component, ELogLevel level) const final {
with_lock(Mutex_) {
return Inner_->IsActive(component, level);
}
}
void Log(TLogComponentId component, ELogLevel level, const TStringRef& message) final {
with_lock(Mutex_) {
Inner_->Log(component, level, message);
}
}
private:
TLoggerPtr Inner_;
TMutex Mutex_;
};
class TLogger: public ILogger {
public:
TLogger(TLogProviderFunc func, TMaybe<ELogLevel> filter)
: Func_(func)
, Filter_(filter)
{
}
TLogComponentId RegisterComponent(const TStringRef& component) final {
auto [it, inserted] = Components_.emplace(TString(component), 1 + Components_.size());
if (inserted) {
Names_[it->second] = it->first;
}
return it->second;
}
void SetDefaultLevel(ELogLevel level) final {
DefLevel_ = level;
}
void SetComponentLevel(TLogComponentId component, ELogLevel level) final {
CompLevels_[component] = level;
}
bool IsActive(TLogComponentId component, ELogLevel level) const final {
if (Filter_ && !IsLogLevelAllowed(level, *Filter_)) {
return false;
}
if (!Names_.contains(component)) {
return false;
}
if (auto it = CompLevels_.find(component); it != CompLevels_.end()) {
return IsLogLevelAllowed(level, it->second);
}
if (DefLevel_) {
return IsLogLevelAllowed(level, *DefLevel_);
}
return true;
}
void Log(TLogComponentId component, ELogLevel level, const TStringRef& message) final {
if (IsActive(component, level)) {
Func_(Names_[component], level, message);
}
}
private:
const TLogProviderFunc Func_;
const TMaybe<ELogLevel> Filter_;
THashMap<TString, TLogComponentId> Components_;
THashMap<TLogComponentId, TString> Names_;
TMaybe<ELogLevel> DefLevel_;
THashMap<TLogComponentId, ELogLevel> CompLevels_;
};
class TLogProvider : public ILogProvider {
public:
TLogProvider(TLogProviderFunc func, TMaybe<ELogLevel> filter)
: Func_(func)
, Filter_(filter)
{}
TLoggerPtr MakeLogger() const final {
return new TLogger(Func_, Filter_);
}
private:
const TLogProviderFunc Func_;
const TMaybe<ELogLevel> Filter_;
};
}
TLoggerPtr MakeNullLogger() {
return new TNullLogger();
}
TLoggerPtr MakeSynchronizedLogger(const TLoggerPtr& inner) {
return new TSynchronizedLogger(std::move(inner));
}
#define SWITCH_ENUM_TYPE_TO_STR(name, val) \
case val: return TStringBuf(#name);
TStringBuf LevelToString(ELogLevel level) {
switch (static_cast<ui32>(level)) {
UDF_LOG_LEVEL(SWITCH_ENUM_TYPE_TO_STR)
}
return TStringBuf("unknown");
}
#define PARSE_ENUM_TYPE_FROM_STR(name, val) \
if (#name == str) return static_cast<ELogLevel>(val);
TMaybe<ELogLevel> TryLevelFromString(TStringBuf str) {
UDF_LOG_LEVEL(PARSE_ENUM_TYPE_FROM_STR)
return Nothing();
}
#define ENUM_STR_JOIN(name, val) \
#name,
TString LogLevelAvailables() {
return JoinSeq(", ",
{UDF_LOG_LEVEL(ENUM_STR_JOIN)}
);
}
TUniquePtr<ILogProvider> MakeLogProvider(TLogProviderFunc func, TMaybe<ELogLevel> filter) {
return new TLogProvider(func, filter);
}
} // namspace NUdf
} // namspace NYql
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