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//
// ArchiveStrategy.cpp
//
// Library: Foundation
// Package: Logging
// Module: FileChannel
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#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"
#undef compress
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);
FileOutputStream ostr(gzPath);
try
{
DeflatingOutputStream deflater(ostr, DeflatingStreamBuf::STREAM_GZIP);
StreamCopier::copyStream(istr, deflater);
if (!deflater.good() || !ostr.good()) throw WriteFileException(gzPath);
deflater.close();
ostr.close();
istr.close();
}
catch (Poco::Exception&)
{
// deflating failed - remove gz file and leave uncompressed log file
ostr.close();
Poco::File gzf(gzPath);
gzf.remove();
return;
}
File f(path);
f.remove();
return;
}
};
//
// ArchiveStrategy
//
ArchiveStrategy::ArchiveStrategy():
_compress(false),
_pCompressor(0)
{
}
ArchiveStrategy::~ArchiveStrategy()
{
delete _pCompressor;
}
void ArchiveStrategy::compress(bool flag)
{
_compress = flag;
}
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
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