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#include "logger.h"
#include <util/datetime/base.h>
#include <util/stream/file.h>
#include <util/stream/format.h>
#include <util/stream/printf.h>
#include <util/stream/str.h>
#include <util/system/mutex.h>
#include <util/system/rwlock.h>
#include <util/system/thread.h>
namespace NYT {
////////////////////////////////////////////////////////////////////////////////
static TStringBuf StripFileName(TStringBuf path) {
TStringBuf l, r;
if (path.TryRSplit('/', l, r) || path.TryRSplit('\\', l, r)) {
return r;
} else {
return path;
}
}
static char GetLogLevelCode(ILogger::ELevel level) {
switch (level) {
case ILogger::FATAL: return 'F';
case ILogger::ERROR: return 'E';
case ILogger::INFO: return 'I';
case ILogger::DEBUG: return 'D';
}
Y_UNREACHABLE();
}
////////////////////////////////////////////////////////////////////////////////
class TNullLogger
: public ILogger
{
public:
void Log(ELevel level, const TSourceLocation& sourceLocation, const char* format, va_list args) override
{
Y_UNUSED(level);
Y_UNUSED(sourceLocation);
Y_UNUSED(format);
Y_UNUSED(args);
}
};
////////////////////////////////////////////////////////////////////////////////
class TLoggerBase
: public ILogger
{
public:
TLoggerBase(ELevel cutLevel)
: CutLevel_(cutLevel)
{ }
virtual void OutputLine(const TString& line) = 0;
void Log(ELevel level, const TSourceLocation& sourceLocation, const char* format, va_list args) override
{
if (level > CutLevel_) {
return;
}
TStringStream stream;
stream << TInstant::Now().ToStringLocal()
<< " " << GetLogLevelCode(level)
<< " [" << Hex(TThread::CurrentThreadId(), HF_FULL) << "] ";
Printf(stream, format, args);
stream << " - " << StripFileName(sourceLocation.File) << ':' << sourceLocation.Line << Endl;
TGuard<TMutex> guard(Mutex_);
OutputLine(stream.Str());
}
private:
ELevel CutLevel_;
TMutex Mutex_;
};
////////////////////////////////////////////////////////////////////////////////
class TStdErrLogger
: public TLoggerBase
{
public:
TStdErrLogger(ELevel cutLevel)
: TLoggerBase(cutLevel)
{ }
void OutputLine(const TString& line) override
{
Cerr << line;
}
};
ILoggerPtr CreateStdErrLogger(ILogger::ELevel cutLevel)
{
return new TStdErrLogger(cutLevel);
}
////////////////////////////////////////////////////////////////////////////////
class TFileLogger
: public TLoggerBase
{
public:
TFileLogger(ELevel cutLevel, const TString& path, bool append)
: TLoggerBase(cutLevel)
, Stream_(TFile(path, OpenAlways | WrOnly | Seq | (append ? ForAppend : EOpenMode())))
{ }
void OutputLine(const TString& line) override
{
Stream_ << line;
}
private:
TUnbufferedFileOutput Stream_;
};
ILoggerPtr CreateFileLogger(ILogger::ELevel cutLevel, const TString& path, bool append)
{
return new TFileLogger(cutLevel, path, append);
}
////////////////////////////////////////////////////////////////////////////////
class TBufferedFileLogger
: public TLoggerBase
{
public:
TBufferedFileLogger(ELevel cutLevel, const TString& path, bool append)
: TLoggerBase(cutLevel)
, Stream_(TFile(path, OpenAlways | WrOnly | Seq | (append ? ForAppend : EOpenMode())))
{ }
void OutputLine(const TString& line) override
{
Stream_ << line;
}
private:
TFileOutput Stream_;
};
ILoggerPtr CreateBufferedFileLogger(ILogger::ELevel cutLevel, const TString& path, bool append)
{
return new TBufferedFileLogger(cutLevel, path, append);
}
////////////////////////////////////////////////////////////////////////////////
static TRWMutex LoggerMutex;
static ILoggerPtr Logger;
struct TLoggerInitializer
{
TLoggerInitializer()
{
Logger = new TNullLogger;
}
} LoggerInitializer;
void SetLogger(ILoggerPtr logger)
{
auto guard = TWriteGuard(LoggerMutex);
if (logger) {
Logger = logger;
} else {
Logger = new TNullLogger;
}
}
ILoggerPtr GetLogger()
{
auto guard = TReadGuard(LoggerMutex);
return Logger;
}
////////////////////////////////////////////////////////////////////////////////
}
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