mirror of
https://github.com/pocoproject/poco.git
synced 2024-12-27 03:28:49 +01:00
249 lines
9.5 KiB
C++
249 lines
9.5 KiB
C++
//
|
|
// FileChannel.h
|
|
//
|
|
// $Id: //poco/Main/Foundation/include/Poco/FileChannel.h#2 $
|
|
//
|
|
// Library: Foundation
|
|
// Package: Logging
|
|
// Module: FileChannel
|
|
//
|
|
// Definition of the FileChannel class.
|
|
//
|
|
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
|
|
// and Contributors.
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person or organization
|
|
// obtaining a copy of the software and accompanying documentation covered by
|
|
// this license (the "Software") to use, reproduce, display, distribute,
|
|
// execute, and transmit the Software, and to prepare derivative works of the
|
|
// Software, and to permit third-parties to whom the Software is furnished to
|
|
// do so, all subject to the following:
|
|
//
|
|
// The copyright notices in the Software and this entire statement, including
|
|
// the above license grant, this restriction and the following disclaimer,
|
|
// must be included in all copies of the Software, in whole or in part, and
|
|
// all derivative works of the Software, unless such copies or derivative
|
|
// works are solely in the form of machine-executable object code generated by
|
|
// a source language processor.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
|
|
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
|
|
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
|
|
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
|
// DEALINGS IN THE SOFTWARE.
|
|
//
|
|
|
|
|
|
#ifndef Foundation_FileChannel_INCLUDED
|
|
#define Foundation_FileChannel_INCLUDED
|
|
|
|
|
|
#include "Poco/Foundation.h"
|
|
#include "Poco/Channel.h"
|
|
#include "Poco/Timestamp.h"
|
|
#include "Poco/Mutex.h"
|
|
|
|
|
|
namespace Poco {
|
|
|
|
|
|
class LogFile;
|
|
class RotateStrategy;
|
|
class ArchiveStrategy;
|
|
class PurgeStrategy;
|
|
|
|
|
|
class Foundation_API FileChannel: public Channel
|
|
/// A Channel that writes to a file. This class supports
|
|
/// flexible log file rotation and archiving, as well
|
|
/// as automatic purging of archived log files.
|
|
///
|
|
/// Only the message's text is written, followed
|
|
/// by a newline.
|
|
///
|
|
/// Chain this channel to a FormattingChannel with an
|
|
/// appropriate Formatter to control what is in the text.
|
|
///
|
|
/// The FileChannel support log file rotation based
|
|
/// on log file size or time intervals.
|
|
/// Archived log files can be compressed in gzip format.
|
|
/// Older archived files can be automatically deleted
|
|
/// (purged).
|
|
///
|
|
/// The rotation strategy can be specified with the
|
|
/// "rotation" property, which can take one of the
|
|
/// follwing values:
|
|
///
|
|
/// * never: no log rotation
|
|
/// * [day,][hh]:mm: the file is rotated on specified day/time
|
|
/// day - day is specified as long or short day name (Monday|Mon, Tuesday|Tue, ... );
|
|
/// day can be omitted, in which case log is rotated every day
|
|
/// hh - valid hour range is 00-23;
|
|
/// hour can be omitted, in which case log is rotated every hour
|
|
/// mm - valid minute range is 00-59;
|
|
/// minute must be specified
|
|
/// * daily: the file is rotated daily
|
|
/// * weekly: the file is rotated every seven days
|
|
/// * monthly: the file is rotated every 30 days
|
|
/// * <n> hours: the file is rotated every <n> hours, where
|
|
/// <n> is an integer greater than zero.
|
|
/// * <n> days: the file is rotated every <n> days, where
|
|
/// <n> is an integer greater than zero.
|
|
/// * <n> weeks: the file is rotated every <n> weeks, where
|
|
/// <n> is an integer greater than zero.
|
|
/// * <n> months: the file is rotated every <n> months, where
|
|
/// <n> is an integer greater than zero and
|
|
/// a month has 30 days.
|
|
/// * <n>: the file is rotated when its size exceeds
|
|
/// <n> bytes.
|
|
/// * <n> K: the file is rotated when its size exceeds
|
|
/// <n> Kilobytes.
|
|
/// * <n> M: the file is rotated when its size exceeds
|
|
/// <n> Megabytes.
|
|
///
|
|
/// Using the "archive" property it is possible to specify
|
|
/// how archived log files are named. The following values
|
|
/// for the "archive" property are supported:
|
|
///
|
|
/// * number: A number, starting with 0, is appended to
|
|
/// the name of archived log files. The newest
|
|
/// archived log file always has the number 0.
|
|
/// For example, if the log file is named
|
|
/// "access.log", and it fulfils the criteria
|
|
/// for rotation, the file is renamed to
|
|
/// "access.log.0". If a file named "access.log.0"
|
|
/// already exists, it is renamed to "access.log.1",
|
|
/// and so on.
|
|
/// * timestamp: A timestamp is appended to the log file name.
|
|
/// For example, if the log file is named
|
|
/// "access.log", and it fulfils the criteria
|
|
/// for rotation, the file is renamed to
|
|
/// "access.log.20050802110300".
|
|
///
|
|
/// Using the "times" property it is possible to specify
|
|
/// time mode for the day/time based rotation. The following values
|
|
/// for the "times" property are supported:
|
|
///
|
|
/// * utc: Rotation strategy is based on UTC time (default).
|
|
/// * local: Rotation strategy is based on local time.
|
|
///
|
|
/// Archived log files can be compressed using the gzip compression
|
|
/// method. Compressing can be controlled with the "compression"
|
|
/// property. The following values for the "compress" property
|
|
/// are supported:
|
|
///
|
|
/// * true: Compress archived log files.
|
|
/// * false: Do not compress archived log files.
|
|
///
|
|
/// Archived log files can be automatically purged, either if
|
|
/// they reach a certain age, or if the number of archived
|
|
/// log files reaches a given maximum number. This is
|
|
/// controlled by the purgeAge and purgeCount properties.
|
|
///
|
|
/// The purgeAge property can have the following values:
|
|
///
|
|
/// * <n> [seconds] the maximum age is <n> seconds.
|
|
/// * <n> minutes: the maximum age is <n> minutes.
|
|
/// * <n> hours: the maximum age is <n> hours.
|
|
/// * <n> days: the maximum age is <n> days.
|
|
/// * <n> weeks: the maximum age is <n> weeks.
|
|
/// * <n> months: the maximum age is <n> months, where a month has 30 days.
|
|
///
|
|
/// The purgeCount property has an integer value that
|
|
/// specifies the maximum number of archived log files.
|
|
/// If the number is exceeded, archived log files are
|
|
/// deleted, starting with the oldest.
|
|
///
|
|
/// For a more lightweight file channel class, see SimpleFileChannel.
|
|
{
|
|
public:
|
|
FileChannel();
|
|
/// Creates the FileChannel.
|
|
|
|
FileChannel(const std::string& path);
|
|
/// Creates the FileChannel for a file with the given path.
|
|
|
|
void open();
|
|
/// Opens the FileChannel and creates the log file if necessary.
|
|
|
|
void close();
|
|
/// Closes the FileChannel.
|
|
|
|
void log(const Message& msg);
|
|
/// Logs the given message to the file.
|
|
|
|
void setProperty(const std::string& name, const std::string& value);
|
|
/// Sets the property with the given name.
|
|
///
|
|
/// The following properties are supported:
|
|
/// * path: The log file's path.
|
|
/// * rotation: The log file's rotation mode. See the
|
|
/// FileChannel class for details.
|
|
/// * archive: The log file's archive mode. See the
|
|
/// FileChannel class for details.
|
|
/// * times: The log file's time mode. See the
|
|
/// FileChannel class for details.
|
|
/// * compress: Enable or disable compression of
|
|
/// archived files. See the FileChannel class
|
|
/// for details.
|
|
/// * purgeAge: Maximum age of an archived log file before
|
|
/// it is purged. See the FileChannel class for
|
|
/// details.
|
|
/// * purgeCount: Maximum number of archived log files before
|
|
/// files are purged. See the FileChannel class
|
|
/// for details.
|
|
|
|
std::string getProperty(const std::string& name) const;
|
|
/// Returns the value of the property with the given name.
|
|
/// See setProperty() for a description of the supported
|
|
/// properties.
|
|
|
|
Timestamp creationDate() const;
|
|
/// Returns the log file's creation date.
|
|
|
|
UInt64 size() const;
|
|
/// Returns the log file's current size in bytes.
|
|
|
|
const std::string& path() const;
|
|
/// Returns the log file's path.
|
|
|
|
static const std::string PROP_PATH;
|
|
static const std::string PROP_ROTATION;
|
|
static const std::string PROP_ARCHIVE;
|
|
static const std::string PROP_TIMES;
|
|
static const std::string PROP_COMPRESS;
|
|
static const std::string PROP_PURGEAGE;
|
|
static const std::string PROP_PURGECOUNT;
|
|
|
|
protected:
|
|
~FileChannel();
|
|
void setRotation(const std::string& rotation);
|
|
void setArchive(const std::string& archive);
|
|
void setCompress(const std::string& compress);
|
|
void setPurgeAge(const std::string& age);
|
|
void setPurgeCount(const std::string& count);
|
|
void purge();
|
|
|
|
private:
|
|
std::string _path;
|
|
std::string _times;
|
|
std::string _rotation;
|
|
std::string _archive;
|
|
bool _compress;
|
|
std::string _purgeAge;
|
|
std::string _purgeCount;
|
|
LogFile* _pFile;
|
|
RotateStrategy* _pRotateStrategy;
|
|
ArchiveStrategy* _pArchiveStrategy;
|
|
PurgeStrategy* _pPurgeStrategy;
|
|
FastMutex _mutex;
|
|
};
|
|
|
|
|
|
} // namespace Poco
|
|
|
|
|
|
#endif // Foundation_FileChannel_INCLUDED
|