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109 lines
2.6 KiB
C++
109 lines
2.6 KiB
C++
//
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// PurgeStrategy.h
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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 PurgeStrategy class.
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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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// SPDX-License-Identifier: BSL-1.0
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//
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#ifndef Foundation_PurgeStrategy_INCLUDED
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#define Foundation_PurgeStrategy_INCLUDED
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#include <vector>
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#include "Poco/File.h"
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#include "Poco/Foundation.h"
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#include "Poco/Timespan.h"
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namespace Poco
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{
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class Foundation_API PurgeStrategy
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/// The PurgeStrategy is used by FileChannel
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/// to purge archived log files.
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{
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public:
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PurgeStrategy();
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virtual ~PurgeStrategy();
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virtual void purge(const std::string & path) = 0;
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/// Purges archived log files. The path to the
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/// current "hot" log file is given.
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/// To find archived log files, look for files
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/// with a name consisting of the given path
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/// plus any suffix (e.g., .1, .20050929081500, .1.gz).
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/// A list of archived files can be obtained by calling
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/// the list() method.
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protected:
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void list(const std::string & path, std::vector<File> & files);
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/// Fills the given vector with a list of archived log
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/// files. The path of the current "hot" log file is
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/// given in path.
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///
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/// All files with the same name as the one given in path,
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/// plus some suffix (e.g., .1, .20050929081500, .1.gz) are
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/// considered archived files.
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private:
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PurgeStrategy(const PurgeStrategy &);
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PurgeStrategy & operator=(const PurgeStrategy &);
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};
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class Foundation_API PurgeByAgeStrategy : public PurgeStrategy
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/// This purge strategy purges all files that have
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/// exceeded a given age (given in seconds).
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{
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public:
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PurgeByAgeStrategy(const Timespan & age);
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~PurgeByAgeStrategy();
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void purge(const std::string & path);
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private:
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Timespan _age;
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};
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class Foundation_API PurgeByCountStrategy : public PurgeStrategy
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/// This purge strategy ensures that a maximum number
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/// of archived files is not exceeded. Files are deleted
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/// based on their age, with oldest files deleted first.
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{
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public:
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PurgeByCountStrategy(int count);
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~PurgeByCountStrategy();
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void purge(const std::string & path);
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private:
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int _count;
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};
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class Foundation_API PurgeOneFileStrategy : public PurgeStrategy
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/// This purge strategy unconditionally purges one oldest file.
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/// If there are no archived files, it will truncate current "hot" log file.
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/// Intended usage: when there are no space left on device with logs.
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{
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public:
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void purge(const std::string & path);
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};
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} // namespace Poco
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#endif // Foundation_PurgeStrategy_INCLUDED
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