LogWriter.h

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/*
 * LogWriter.h
 *
 * Smalltalk like class library for C++
 * Logging facility with priorities and stream-like interface. Header.
 *
 * Copyright (c) 2004 Milan Cermak
 */
/*
 * 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.
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#ifndef __LOGWRITER_H
#define __LOGWRITER_H

#include <stlib/StreamDecorator.h>

#include <stlib/SequenceableCollection.h>
#include <stlib/String.h>
#include <stlib/os/Semaphore.h>

namespace Tools {

enum LogVerbosityLevel {
    LogNone, LogError, LogWarning, LogInfo, LogTraffic, LogDebug
};

class Filename;

class LogWriter : public Core::StreamDecorator
{
  protected:
    LogVerbosityLevel _level;
    OS::Semaphore *mutex;

  public:
    LogWriter(Stream *output);
    ~LogWriter(void);

    /* Instance creation protocol */
    static LogWriter *on(String *filename);
    static LogWriter *on(Filename *filename);

    /* Accessing protocol */
    virtual Object *next(void);
    virtual void nextPut(Object *object);
    virtual void nextPut(const char object);
    virtual void writeLog(LogVerbosityLevel level, Collection *collection);
    virtual void writeLog(LogVerbosityLevel level, const char *collection);

    virtual void logAll(void);
    virtual void logErrors(void);
    virtual void logWarnings(void);
    virtual void logInfos(void);
    virtual void logNone(void);
    virtual void logTraffic(void);
    virtual void logDebug(void);
    virtual LogVerbosityLevel verbosity(void);
    virtual void verbosity(LogVerbosityLevel level);

    /* Status protocol */
    virtual void close(void);
    virtual void commit(void);

    /* Testing protocol */
    virtual bool isBinary(void);

    /* Private protocol */
    virtual void writeLevel(LogVerbosityLevel level);

  protected:
    virtual SequenceableCollection *contentSpeciesFor(long items);
};

};

#endif /* __LOGWRITER_H */

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