rstudio/src/cpp/core/FileLogWriter.cpp at master · andschar/rstudio · GitHub

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* FileLogWriter.cpp

* Unless you have received this program directly from RStudio pursuant

* to the terms of a commercial license agreement with RStudio, then

* this program is licensed to you under the terms of version 3 of the

* GNU Affero General Public License. This program is distributed WITHOUT

* ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT,

* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the

* AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details.

#include <core/FileLogWriter.hpp>

#include <core/FileInfo.hpp>

#include <core/FileSerializer.hpp>

#include <core/system/System.hpp>

#include <core/Thread.hpp>

namespace rstudio {

namespace core {

FileLogWriter::FileLogWriter(const std::string& programIdentity,

int logLevel,

const FilePath& logDir)

: programIdentity_(programIdentity),

logLevel_(logLevel)

{

logDir.ensureDirectory();

logFile_ = logDir.childPath(programIdentity + ".log");

rotatedLogFile_ = logDir.childPath(programIdentity + ".rotated.log");

if (!logFile_.exists())

{

// swallow errors -- we can't log so it doesn't matter

core::appendToFile(logFile_, "");

}

FileLogWriter::~FileLogWriter()

{

try

{

// we don't keep a file handle open so do nothing here

}

catch(...)

{

}

void FileLogWriter::log(core::system::LogLevel logLevel,

const std::string& message)

{

log(programIdentity_, logLevel, message);

}

void FileLogWriter::log(const std::string& programIdentity,

core::system::LogLevel logLevel,

const std::string& message)

{

if (logLevel > logLevel_)

return;

LOCK_MUTEX(mutex_)

{

rotateLogFile();

// Swallow errors--we can't do anything anyway

core::appendToFile(logFile_, formatLogEntry(programIdentity, message));

}

END_LOCK_MUTEX

}

#define LOGMAX (2048*1024) // rotate/remove every 2 megabytes

bool FileLogWriter::rotateLogFile()

{

if (logFile_.exists() && logFile_.size() > LOGMAX)

{

// first remove the rotated log file if it exists (ignore errors because

// there's nothing we can do with them at this level)

rotatedLogFile_.removeIfExists();

// now rotate the log file

logFile_.move(rotatedLogFile_);

return true;

}

return false;

}

} // namespace core

} // namespace rstudio

rstudio/src/cpp/core/FileLogWriter.cpp at master · andschar/rstudio · GitHub

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