Logo Search packages:      
Sourcecode: poco version File versions  Download package

ArchiveStrategy.cpp

//
// ArchiveStrategy.cpp
//
// $Id: //poco/1.3/Foundation/src/ArchiveStrategy.cpp#4 $
//
// Library: Foundation
// Package: Logging
// Module:  FileChannel
//
// 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.
//


#include "Poco/ArchiveStrategy.h"
#include "Poco/NumberFormatter.h"
#include "Poco/File.h"
#include "Poco/Path.h"
#include "Poco/DeflatingStream.h"
#include "Poco/StreamCopier.h"
#include "Poco/Exception.h"
#include "Poco/ActiveDispatcher.h"
#include "Poco/ActiveMethod.h"
#include "Poco/Void.h"
#include "Poco/FileStream.h"


namespace Poco {


//
// ArchiveCompressor
//


class ArchiveCompressor: public ActiveDispatcher
{
public:
      ArchiveCompressor():
            compress(this, &ArchiveCompressor::compressImpl)
      {
      }
      
      ~ArchiveCompressor()
      {
      }
      
      ActiveMethod<Void, std::string, ArchiveCompressor, ActiveStarter<ActiveDispatcher> > compress;

protected:
      Void compressImpl(const std::string& path)
      {
            std::string gzPath(path);
            gzPath.append(".gz");
            FileInputStream istr(path, std::ios::binary | std::ios::in);
            if (!istr.good()) throw OpenFileException(path);
            FileOutputStream ostr(gzPath, std::ios::binary | std::ios::out);
            if (ostr.good())
            {
                  DeflatingOutputStream deflater(ostr, DeflatingStreamBuf::STREAM_GZIP);
                  StreamCopier::copyStream(istr, deflater);
                  deflater.close();
                  ostr.close();
                  istr.close();
                  File f(path);
                  f.remove();
            }
            else throw CreateFileException(gzPath);
            return Void();
      }
};


//
// ArchiveStrategy
//


ArchiveStrategy::ArchiveStrategy(): 
      _compress(false),
      _pCompressor(0)
{
}


ArchiveStrategy::~ArchiveStrategy()
{
      delete _pCompressor;
}


00114 void ArchiveStrategy::compress(bool flag)
{
      _compress = flag;
}


00120 void ArchiveStrategy::moveFile(const std::string& oldPath, const std::string& newPath)
{
      bool compressed = false;
      Path p(oldPath);
      File f(oldPath);
      if (!f.exists())
      {
            f = oldPath + ".gz";
            compressed = true;
      }
      std::string mvPath(newPath);
      if (_compress || compressed)
            mvPath.append(".gz");
      if (!_compress || compressed)
      {
            f.renameTo(mvPath);
      }
      else
      {
            f.renameTo(newPath);
            if (!_pCompressor) _pCompressor = new ArchiveCompressor;
            _pCompressor->compress(newPath);
      }
}


bool ArchiveStrategy::exists(const std::string& name)
{
      File f(name);
      if (f.exists())
      {
            return true;
      }
      else if (_compress)
      {
            std::string gzName(name);
            gzName.append(".gz");
            File gzf(gzName);
            return gzf.exists();
      }
      else return false;
}


//
// ArchiveByNumberStrategy
//


ArchiveByNumberStrategy::ArchiveByNumberStrategy()
{
}


ArchiveByNumberStrategy::~ArchiveByNumberStrategy()
{
}


LogFile* ArchiveByNumberStrategy::archive(LogFile* pFile)
{
      std::string basePath = pFile->path();
      delete pFile;
      int n = -1;
      std::string path;
      do
      {
            path = basePath;
            path.append(".");
            NumberFormatter::append(path, ++n);
      }
      while (exists(path));
      
      while (n >= 0)
      {
            std::string oldPath = basePath;
            if (n > 0)
            {
                  oldPath.append(".");
                  NumberFormatter::append(oldPath, n - 1);
            }
            std::string newPath = basePath;
            newPath.append(".");
            NumberFormatter::append(newPath, n);
            moveFile(oldPath, newPath);
            --n;
      }
      return new LogFile(basePath);
}


} // namespace Poco

Generated by  Doxygen 1.6.0   Back to index