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https://github.com/YACReader/yacreader
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102 lines
3.5 KiB
C++
102 lines
3.5 KiB
C++
// Copyright (c) 2013, Razvan Petru
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// All rights reserved.
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// Redistribution and use in source and binary forms, with or without modification,
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// are permitted provided that the following conditions are met:
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// * Redistributions of source code must retain the above copyright notice, this
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// list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice, this
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// list of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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// * The name of the contributors may not be used to endorse or promote products
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// derived from this software without specific prior written permission.
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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// IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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// INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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// OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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// OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef QSLOGDESTFILE_H
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#define QSLOGDESTFILE_H
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#include "QsLogDest.h"
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#include <QFile>
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#include <QTextStream>
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#include <QtGlobal>
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#include <QSharedPointer>
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namespace QsLogging
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{
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class RotationStrategy
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{
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public:
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virtual ~RotationStrategy();
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virtual void setInitialInfo(const QFile &file) = 0;
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virtual void includeMessageInCalculation(const QString &message) = 0;
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virtual bool shouldRotate() = 0;
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virtual void rotate() = 0;
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virtual QIODevice::OpenMode recommendedOpenModeFlag() = 0;
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};
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// Never rotates file, overwrites existing file.
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class NullRotationStrategy : public RotationStrategy
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{
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public:
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virtual void setInitialInfo(const QFile &) {}
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virtual void includeMessageInCalculation(const QString &) {}
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virtual bool shouldRotate() { return false; }
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virtual void rotate() {}
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virtual QIODevice::OpenMode recommendedOpenModeFlag() { return QIODevice::Truncate; }
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};
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// Rotates after a size is reached, keeps a number of <= 10 backups, appends to existing file.
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class SizeRotationStrategy : public RotationStrategy
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{
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public:
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SizeRotationStrategy();
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static const int MaxBackupCount;
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virtual void setInitialInfo(const QFile &file);
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virtual void includeMessageInCalculation(const QString &message);
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virtual bool shouldRotate();
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virtual void rotate();
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virtual QIODevice::OpenMode recommendedOpenModeFlag();
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void setMaximumSizeInBytes(qint64 size);
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void setBackupCount(int backups);
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private:
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QString mFileName;
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qint64 mCurrentSizeInBytes;
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qint64 mMaxSizeInBytes;
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int mBackupsCount;
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};
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typedef QSharedPointer<RotationStrategy> RotationStrategyPtr;
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// file message sink
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class FileDestination : public Destination
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{
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public:
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FileDestination(const QString& filePath, RotationStrategyPtr rotationStrategy);
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virtual void write(const QString& message, Level level);
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virtual bool isValid();
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private:
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QFile mFile;
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QTextStream mOutputStream;
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QSharedPointer<RotationStrategy> mRotationStrategy;
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};
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}
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#endif // QSLOGDESTFILE_H
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