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SimpleFileChannel.cpp

//
// SimpleFileChannel.cpp
//
// $Id: //poco/1.3/Foundation/src/SimpleFileChannel.cpp#2 $
//
// Library: Foundation
// Package: Logging
// Module:  SimpleFileChannel
//
// Copyright (c) 2005-2006, 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.
//


#include "Poco/SimpleFileChannel.h"
#include "Poco/LogFile.h"
#include "Poco/File.h"
#include "Poco/Message.h"
#include "Poco/Exception.h"
#include <cctype>


namespace Poco {


const std::string SimpleFileChannel::PROP_PATH          = "path";
const std::string SimpleFileChannel::PROP_SECONDARYPATH = "secondaryPath";
const std::string SimpleFileChannel::PROP_ROTATION      = "rotation";


SimpleFileChannel::SimpleFileChannel(): 
      _limit(0),
      _pFile(0)
{
}


00060 SimpleFileChannel::SimpleFileChannel(const std::string& path):
      _path(path),
      _secondaryPath(path + ".0"),
      _limit(0),
      _pFile(0)
{
}


SimpleFileChannel::~SimpleFileChannel()
{
      close();
}


00075 void SimpleFileChannel::open()
{
      FastMutex::ScopedLock lock(_mutex);
      
      if (!_pFile)
      {
            File primary(_path);
            File secondary(_secondaryPath);
            Timestamp pt = primary.exists() ? primary.getLastModified() : 0;
            Timestamp st = secondary.exists() ? secondary.getLastModified() : 0;
            std::string path;
            if (pt >= st)
                  path = _path;
            else
                  path = _secondaryPath;
            _pFile = new LogFile(path);
      }
}


00095 void SimpleFileChannel::close()
{
      FastMutex::ScopedLock lock(_mutex);

      delete _pFile;
      _pFile = 0;
}


00104 void SimpleFileChannel::log(const Message& msg)
{
      open();

      FastMutex::ScopedLock lock(_mutex);

      if (_limit > 0 && _pFile->size() >= _limit)
      {
            rotate();
      }
      _pFile->write(msg.getText());
}

      
00118 void SimpleFileChannel::setProperty(const std::string& name, const std::string& value)
{
      FastMutex::ScopedLock lock(_mutex);

      if (name == PROP_PATH)
      {
            _path = value;
            if (_secondaryPath.empty())
                  _secondaryPath = _path + ".0";
      }
      else if (name == PROP_SECONDARYPATH)
            _secondaryPath = value;
      else if (name == PROP_ROTATION)
            setRotation(value);
      else
            Channel::setProperty(name, value);
}


00137 std::string SimpleFileChannel::getProperty(const std::string& name) const
{
      if (name == PROP_PATH)
            return _path;
      else if (name == PROP_SECONDARYPATH)
            return _secondaryPath;
      else if (name == PROP_ROTATION)
            return _rotation;
      else
            return Channel::getProperty(name);
}


00150 Timestamp SimpleFileChannel::creationDate() const
{
      if (_pFile)
            return _pFile->creationDate();
      else
            return 0;
}

      
00159 UInt64 SimpleFileChannel::size() const
{
      if (_pFile)
            return _pFile->size();
      else
            return 0;
}


00168 const std::string& SimpleFileChannel::path() const
{
      return _path;
}


00174 const std::string& SimpleFileChannel::secondaryPath() const
{
      return _secondaryPath;
}


void SimpleFileChannel::setRotation(const std::string& rotation)
{
      std::string::const_iterator it  = rotation.begin();
      std::string::const_iterator end = rotation.end();
      UInt64 n = 0;
      while (it != end && std::isspace(*it)) ++it;
      while (it != end && std::isdigit(*it)) { n *= 10; n += *it++ - '0'; }
      while (it != end && std::isspace(*it)) ++it;
      std::string unit;
      while (it != end && std::isalpha(*it)) unit += *it++;
      
      if (unit == "K")
            _limit = n*1024;
      else if (unit == "M")
            _limit = n*1024*1024;
      else if (unit.empty())
            _limit = n;
      else if (unit == "never")
            _limit = 0;
      else
            throw InvalidArgumentException("rotation", rotation);
      _rotation = rotation;
}


void SimpleFileChannel::rotate()
{
      std::string newPath;
      if (_pFile->path() == _path)
            newPath = _secondaryPath;
      else
            newPath = _path;
      File f(newPath);
      if (f.exists())
      {
            try
            {
                  f.remove();
            }
            catch (...)
            {
            }
      }
      delete _pFile;
      _pFile = new LogFile(newPath);
}


} // namespace Poco

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