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181 lines
4.7 KiB
C++
181 lines
4.7 KiB
C++
//
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// RotateStrategy.h
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//
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// $Id: //poco/Main/Foundation/include/Poco/RotateStrategy.h#3 $
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//
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// Library: Foundation
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// Package: Logging
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// Module: FileChannel
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//
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// Definition of the RotateStrategy class and subclasses.
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//
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// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// Permission is hereby granted, free of charge, to any person or organization
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// obtaining a copy of the software and accompanying documentation covered by
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// this license (the "Software") to use, reproduce, display, distribute,
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// execute, and transmit the Software, and to prepare derivative works of the
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// Software, and to permit third-parties to whom the Software is furnished to
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// do so, all subject to the following:
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//
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// The copyright notices in the Software and this entire statement, including
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// the above license grant, this restriction and the following disclaimer,
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// must be included in all copies of the Software, in whole or in part, and
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// all derivative works of the Software, unless such copies or derivative
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// works are solely in the form of machine-executable object code generated by
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// a source language processor.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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#ifndef Foundation_RotateStrategy_INCLUDED
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#define Foundation_RotateStrategy_INCLUDED
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#include "Poco/Foundation.h"
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#include "Poco/Timespan.h"
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#include "Poco/Timestamp.h"
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#include "Poco/Exception.h"
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#include "Poco/LogFile.h"
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#include "Poco/StringTokenizer.h"
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#include "Poco/DateTimeParser.h"
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#include "Poco/NumberParser.h"
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namespace Poco {
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class Foundation_API RotateStrategy
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/// The RotateStrategy is used by LogFile to determine when
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/// a file must be rotated.
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{
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public:
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RotateStrategy();
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virtual ~RotateStrategy();
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virtual bool mustRotate(LogFile* pFile) = 0;
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/// Returns true if the given log file must
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/// be rotated, false otherwise.
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private:
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RotateStrategy(const RotateStrategy&);
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RotateStrategy& operator = (const RotateStrategy&);
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};
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template <class DT>
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class RotateAtTimeStrategy: public RotateStrategy
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/// The file is rotated at specified [day,][hour]:minute
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{
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public:
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RotateAtTimeStrategy(const std::string& rtime):
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_day(-1),
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_hour(-1),
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_minute(0)
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{
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if (rtime.empty())
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throw InvalidArgumentException("Rotation time must be specified.");
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if ((rtime.find(',') != rtime.npos) && (rtime.find(':') == rtime.npos))
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throw InvalidArgumentException("Invalid rotation time specified.");
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StringTokenizer timestr(rtime, ",:", StringTokenizer::TOK_TRIM | StringTokenizer::TOK_IGNORE_EMPTY);
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int index = 0;
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switch (timestr.count())
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{
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case 3: // day,hh:mm
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{
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std::string::const_iterator it = timestr[index].begin();
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_day = DateTimeParser::parseDayOfWeek(it, timestr[index].end());
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++index;
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}
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case 2: // hh:mm
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_hour = NumberParser::parse(timestr[index]);
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++index;
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case 1: // mm
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_minute = NumberParser::parse(timestr[index]);
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break;
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default:
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throw InvalidArgumentException("Invalid rotation time specified.");
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}
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getNextRollover();
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}
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~RotateAtTimeStrategy()
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{
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}
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bool mustRotate(LogFile* pFile)
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{
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if (DT() >= _threshold)
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{
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getNextRollover();
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return true;
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}
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return false;
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}
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private:
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void getNextRollover()
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{
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Timespan tsp(0, 0, 1, 0, 1000); // 0,00:01:00.001
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do
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{
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_threshold += tsp;
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}
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while (!(_threshold.minute() == _minute &&
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(-1 == _hour || _threshold.hour() == _hour) &&
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(-1 == _day || _threshold.dayOfWeek() == _day)));
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// round to :00.0 seconds
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_threshold.assign(_threshold.year(), _threshold.month(), _threshold.day(), _threshold.hour(), _threshold.minute());
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}
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DT _threshold;
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int _day;
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int _hour;
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int _minute;
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};
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class Foundation_API RotateByIntervalStrategy: public RotateStrategy
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/// The file is rotated when the log file
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/// exceeds a given age.
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{
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public:
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RotateByIntervalStrategy(const Timespan& span);
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~RotateByIntervalStrategy();
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bool mustRotate(LogFile* pFile);
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private:
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Timespan _span;
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};
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class Foundation_API RotateBySizeStrategy: public RotateStrategy
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/// The file is rotated when the log file
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/// exceeds a given size.
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{
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public:
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RotateBySizeStrategy(UInt64 size);
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~RotateBySizeStrategy();
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bool mustRotate(LogFile* pFile);
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private:
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UInt64 _size;
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};
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} // namespace Poco
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#endif // Foundation_RotateStrategy_INCLUDED
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