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/******************************************************************************
 *
 * package:     
 * file:        dailyrollingfileappender.h
 * created:     September 2007
 * author:      Martin Heinrich
 *
 *
 * Copyright 2007 Martin Heinrich
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 ******************************************************************************/

#ifndef _DAILYROLLINGFILEAPPENDER_H
#define _DAILYROLLINGFILEAPPENDER_H


/******************************************************************************
 * Dependencies
 ******************************************************************************/

#include "fileappender.h"

#include <QtCore/QDateTime>


/******************************************************************************
 * Declarations
 ******************************************************************************/

namespace Log4Qt 
{

	/*!
	 * \brief The class DailyRollingFileAppender extends FileAppender so that the
	 *        underlying file is rolled over at a specified frequency.
	 *
	 * \note All the functions declared in this class are thread-safe.
	 *
	 * \note The ownership and lifetime of objects of this class are managed. See
	 *       \ref Ownership "Object ownership" for more details.
	 */
	class  LOG4QT_EXPORT DailyRollingFileAppender : public FileAppender
	{
			Q_OBJECT

			/*!
			 * The property holds the date pattern used by the appender.
			 *
			 * The default is DAILY_ROLLOVER for rollover at midnight each day.
			 *
			 * \sa datePattern(), setDatePattern()
			 */
			Q_PROPERTY(QString datePattern READ datePattern WRITE setDatePattern)

	public:
			/*!
			 * The enum DatePattern defines constants for date patterns.
			 *
			 * \sa setDatePattern(DatePattern)
			 */
			enum DatePattern
			{
				/*! The minutely date pattern string is "'.'yyyy-MM-dd-hh-mm". */
					MINUTELY_ROLLOVER = 0,
				/*! The hourly date pattern string is "'.'yyyy-MM-dd-hh". */
					HOURLY_ROLLOVER,
				/*! The half-daily date pattern string is "'.'yyyy-MM-dd-a". */
					HALFDAILY_ROLLOVER,
				/*! The daily date pattern string is "'.'yyyy-MM-dd". */
					DAILY_ROLLOVER,
				/*! The weekly date pattern string is "'.'yyyy-ww". */
					WEEKLY_ROLLOVER,
				/*! The monthly date pattern string is "'.'yyyy-MM". */
					MONTHLY_ROLLOVER
			};
			Q_ENUMS(DatePattern)

			DailyRollingFileAppender(QObject *pParent = 0);
			DailyRollingFileAppender(Layout *pLayout,
															 const QString &rFileName,
															 const QString &rDatePattern,
															 QObject *pParent = 0);
			virtual ~DailyRollingFileAppender();
	private:
			DailyRollingFileAppender(const DailyRollingFileAppender &rOther); // Not implemented
			DailyRollingFileAppender &operator=(const DailyRollingFileAppender &rOther); // Not implemented

	public:
			QString datePattern() const;

			/*!
		 * Sets the datePattern to the value specified by the \a datePattern
		 * constant.
		 */
			void setDatePattern(DatePattern datePattern);

			void setDatePattern(const QString &rDatePattern);

			virtual void activateOptions();

	protected:
			virtual void append(const LoggingEvent &rEvent);

			/*!
			 * Tests if all entry conditions for using append() in this class are
			 * met.
			 *
			 * If a conditions is not met, an error is logged and the function
			 * returns false. Otherwise the result of
			 * FileAppender::checkEntryConditions() is returned.
			 *
			 * The checked conditions are:
			 * - A valid pattern has been set (APPENDER_USE_INVALID_PATTERN_ERROR)
			 *
			 * The function is called as part of the checkEntryConditions() chain
			 * started by AppenderSkeleton::doAppend().
			 *
			 * \sa AppenderSkeleton::doAppend(),
			 *     AppenderSkeleton::checkEntryConditions()
			 */
			virtual bool checkEntryConditions() const;

	protected:
#ifndef QT_NO_DEBUG_STREAM
			/*!
			 * Writes all object member variables to the given debug stream
			 * \a rDebug and returns the stream.
			 *
			 * <tt>
			 * %DailyRollingFileAppender(name:"DRFA" activedatepattern:"'.'yyyy-MM-dd-hh-mm"
			 *                           appendfile:false bufferedio:true
			 *                           datepattern:"'.'yyyy-MM-dd-hh-mm"
			 *                           encoding:"" frequency:"MINUTELY_ROLLOVER"
			 *                           file:"log.txt" filter:0x0 immediateflush:true
			 *                           isactive:true isclosed:false layout:"TTCC"
			 *                           referencecount:1
			 *                           rollovertime:QDateTime("Mon Oct 22 05:23:00 2007")
			 *                           threshold: "NULL" writer: 0x0 )
			 * </tt>
			 * \sa QDebug, operator<<(QDebug debug, const LogObject &rLogObject)
			 */
			virtual QDebug debug(QDebug &rDebug) const;
#endif // QT_NO_DEBUG_STREAM

	private:
			void computeFrequency();
			void computeRollOverTime();
			QString frequencyToString() const;
			void rollOver();

	private:
			QString mDatePattern;
			DatePattern mFrequency;
			QString mActiveDatePattern;
			QDateTime mRollOverTime;
			QString mRollOverSuffix;
	};


	/**************************************************************************
	 * Operators, Helper
	 **************************************************************************/


	/**************************************************************************
	 * Inline
	 **************************************************************************/

	inline QString DailyRollingFileAppender::datePattern() const
	{   QMutexLocker locker(&mObjectGuard);
			return mDatePattern;   }

	inline void DailyRollingFileAppender::setDatePattern(const QString &rDatePattern)
	{   QMutexLocker locker(&mObjectGuard);
			mDatePattern = rDatePattern;    }


} // namespace Log4Qt 


// Q_DECLARE_TYPEINFO(::DailyRollingFileAppender, Q_COMPLEX_TYPE); // Use default


#endif // _DAILYROLLINGFILEAPPENDER_H