log.h

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/*
 *              log.h
 *
 *      Copyright 2009 - 2017 Brenton Ross
 *
 *      This file is part of SASSY.
 *
 *   SASSY is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   SASSY is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with SASSY.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef CFI_LOG_H
#define CFI_LOG_H

#include <map>
#include <fstream>
#include "sx.h"
#include "udpsocket.h"
#include "ipc.h"

namespace SASSY
{

namespace cfi
{


class logstream : public std::ostream
{
private:
        std::streambuf *buffer;         // owned

protected:
        // static logstream *me;

        // static std::map< std::string, logstream * > *namedStreams;


        logstream( std::streambuf *buf );
public:
        virtual ~logstream();


        static logstream & instance();


        static logstream & instance( csr name );


        void severity( Severity sev);
};


// --------------------------------------------------------------


class logger
{
protected:
        Semaphore sem4;                         
        logger() : sem4('L') {}         
public:
        virtual ~logger() {}


        virtual int log( Severity sev, csr line ) = 0;


        virtual int log( csr logName, Severity sev, csr line ) = 0;
};

// --------------------------------------------------------------


class FormattingLogger : public logger
{
protected:

        std::string timeStamp();

        csr hostname();

        csr process();

        csr severity( Severity );


        int format( std::ostream & s, Severity sev, csr msg );
};

// --------------------------------------------------------------



class StdLogger : public FormattingLogger
{
public:
        enum Stream { COUT, CERR, CLOG };


public:

        explicit StdLogger( Stream cc ) : c(cc) {}

        // Implementations of the logger interface
        int log( Severity, csr line );
        int log( csr logName, Severity, csr line );

private:
        Stream c;
};

// --------------------------------------------------------------


class FileLogger : public FormattingLogger
{
protected:
        std::ofstream f;

public:

        FileLogger( const Path &fname );

        // Implementation of the logger interface
        int log( Severity, csr line );
        int log( csr logName, Severity, csr line );
};

// --------------------------------------------------------------
class PlainFileLogger : public logger
{
protected:
        std::ofstream f;

public:

        PlainFileLogger( const Path &fname );

        // Implementation of the logger interface
        int log( Severity, csr line );
        int log( csr logName, Severity, csr line );
};

// --------------------------------------------------------------


class UDPLogger : public FormattingLogger
{
protected:
        UDPClientSocket socket;
public:
        UDPLogger( csr hostname, int port );

        // Implementation of the logger interface
        int log( Severity, csr line );
        int log( csr logName, Severity, csr line );
};

// --------------------------------------------------------------


class TraceLogger : public logger
{
protected:
        std::ofstream f;

public:
        TraceLogger(const Path & fname );

        // Implementation of the logger interface
        int log( Severity, csr line );
        int log( csr logName, Severity, csr line );
};

// --------------------------------------------------------------


class SystemLogger : public logger
{
public:
        SystemLogger( csr ident );

        // Implementation of the logger interface
        int log( Severity, csr line );
        int log( csr logName, Severity, csr line );
};

} // namespace cfi
} // namespace SASSY

#endif /* LOG_H_ */