LogTarget.h

/*
 * Copyright (C) 2005-2012 by Dr. Marc Boris Duerner
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * As a special exception, you may use this file as part of a free
 * software library without restriction. Specifically, if other files
 * instantiate templates or use macros or inline functions from this
 * file, or you compile this file and link it with other files to
 * produce an executable, this file does not by itself cause the
 * resulting executable to be covered by the GNU General Public
 * License. This exception does not however invalidate any other
 * reasons why the executable file might be covered by the GNU Library
 * General Public License.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#ifndef Pt_System_LogTarget_h
#define Pt_System_LogTarget_h

#include <Pt/System/Api.h>
#include <Pt/System/LogLevel.h>
#include <Pt/NonCopyable.h>
#include <Pt/Atomicity.h>
#include <string>

namespace Pt {

namespace System {

class LogChannel;
class LogRecord;

class PT_SYSTEM_API LogTarget : protected Pt::NonCopyable
{
    friend class LogManager;

    protected:
        LogTarget(const std::string& name, LogTarget* parent = 0);

    public:
        virtual ~LogTarget();

        const std::string& name() const;

        int logLevel() const
        {
            return atomicGet(_loglevel);
        }

        void setLogLevel(LogLevel level);

        std::string channelUrl() const;

        void setChannel(const std::string& url);

        void log(const LogRecord& record);

        static LogTarget& get(const std::string& name);

    protected:
        LogTarget* parent() const
        { return _parent; }

        bool inheritsLogLevel() const;

        void assignLogLevel(int level, bool inherited);

        bool inheritsChannel() const;

        LogChannel* channel() const
        { return _channel; }

        void removeChannel();

        void assignChannel(LogChannel& ch);

    private:
        LogTarget* _parent;

        std::string _name;

        mutable volatile atomic_t _loglevel;

        bool _inheritLogLevel;

        LogChannel* _channel;

        bool _inheritChannel;
};

} // namespace System

} // namespace Pt

#endif // Pt_System_LogTarget_h