library/cpp/tvmauth/client/logger.h


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#pragma once 
 
#include <util/generic/ptr.h> 
 
namespace NTvmAuth { 
    class ILogger: public TAtomicRefCount<ILogger> { 
    public: 
        virtual ~ILogger() = default; 
 
        void Debug(const TString& msg) { 
            Log(7, msg); 
        } 
 
        void Info(const TString& msg) { 
            Log(6, msg); 
        } 
 
        void Warning(const TString& msg) { 
            Log(4, msg); 
        } 
 
        void Error(const TString& msg) { 
            Log(3, msg); 
        } 
 
    protected: 
        /*! 
         * Log event 
         * @param lvl is syslog level: 0(Emergency) ... 7(Debug) 
         * @param msg 
         */ 
        virtual void Log(int lvl, const TString& msg) = 0; 
    }; 
 
    class TCerrLogger: public ILogger { 
    public: 
        TCerrLogger(int level) 
            : Level_(level) 
        { 
        } 
 
        void Log(int lvl, const TString& msg) override; 
 
    private: 
        const int Level_; 
    }; 
 
    using TLoggerPtr = TIntrusivePtr<ILogger>; 
 
    class TDevNullLogger: public ILogger { 
    public: 
        static TLoggerPtr IAmBrave() { 
            return MakeIntrusive<TDevNullLogger>(); 
        } 
 
        void Log(int, const TString&) override { 
        } 
    }; 
}