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/* Copyright (C) 2003 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA */
#include <ndb_global.h>
#include <FileLogHandler.hpp>
#include <File.hpp>
//
// PUBLIC
//
FileLogHandler::FileLogHandler() :
LogHandler(),
m_maxNoFiles(MAX_NO_FILES),
m_maxFileSize(MAX_FILE_SIZE),
m_maxLogEntries(MAX_LOG_ENTRIES)
{
m_pLogFile = new File_class("logger.log", "a+");
}
FileLogHandler::FileLogHandler(const char* aFileName,
int maxNoFiles,
long maxFileSize,
unsigned int maxLogEntries) :
LogHandler(),
m_maxNoFiles(maxNoFiles),
m_maxFileSize(maxFileSize),
m_maxLogEntries(maxLogEntries)
{
m_pLogFile = new File_class(aFileName, "a+");
}
FileLogHandler::~FileLogHandler()
{
delete m_pLogFile;
}
bool
FileLogHandler::open()
{
bool rc = true;
if (m_pLogFile->open())
{
if (isTimeForNewFile())
{
if (!createNewFile())
{
setErrorCode(errno);
rc = false;
}
}
}
else
{
setErrorCode(errno);
rc = false;
}
return rc;
}
bool
FileLogHandler::close()
{
bool rc = true;
if (!m_pLogFile->close())
{
setErrorCode(errno);
rc = false;
}
return rc;
}
void
FileLogHandler::writeHeader(const char* pCategory, Logger::LoggerLevel level)
{
char str[LogHandler::MAX_HEADER_LENGTH];
m_pLogFile->writeChar(getDefaultHeader(str, pCategory, level));
}
void
FileLogHandler::writeMessage(const char* pMsg)
{
m_pLogFile->writeChar(pMsg);
}
void
FileLogHandler::writeFooter()
{
static int callCount = 0;
m_pLogFile->writeChar(getDefaultFooter());
/**
* The reason I also check the number of log entries instead of
* only the log size, is that I do not want to check the file size
* after each log entry which requires system calls and is quite slow.
* TODO: Any better way?
*/
if (callCount % m_maxLogEntries != 0) // Check every m_maxLogEntries
{
if (isTimeForNewFile())
{
if (!createNewFile())
{
// Baby one more time...
createNewFile();
}
}
callCount = 0;
}
callCount++;
m_pLogFile->flush();
}
//
// PRIVATE
//
bool
FileLogHandler::isTimeForNewFile()
{
return (m_pLogFile->size() >= m_maxFileSize);
}
bool
FileLogHandler::createNewFile()
{
bool rc = true;
int fileNo = 1;
char newName[PATH_MAX];
time_t newMtime, preMtime = 0;
do
{
if (fileNo >= m_maxNoFiles)
{
fileNo = 1;
BaseString::snprintf(newName, sizeof(newName),
"%s.%d", m_pLogFile->getName(), fileNo);
break;
}
BaseString::snprintf(newName, sizeof(newName),
"%s.%d", m_pLogFile->getName(), fileNo++);
newMtime = File_class::mtime(newName);
if (newMtime < preMtime)
{
break;
}
else
{
preMtime = newMtime;
}
} while (File_class::exists(newName));
m_pLogFile->close();
if (!File_class::rename(m_pLogFile->getName(), newName))
{
setErrorCode(errno);
rc = false;
}
// Open again
if (!m_pLogFile->open())
{
setErrorCode(errno);
rc = false;
}
return rc;
}
bool
FileLogHandler::setParam(const BaseString ¶m, const BaseString &value){
if(param == "filename")
return setFilename(value);
if(param == "maxsize")
return setMaxSize(value);
if(param == "maxfiles")
return setMaxFiles(value);
setErrorStr("Invalid parameter");
return false;
}
bool
FileLogHandler::setFilename(const BaseString &filename) {
close();
if(m_pLogFile)
delete m_pLogFile;
m_pLogFile = new File_class(filename.c_str(), "a+");
return open();
}
bool
FileLogHandler::setMaxSize(const BaseString &size) {
char *end;
long val = strtol(size.c_str(), &end, 0); /* XXX */
if(size.c_str() == end || val < 0)
{
setErrorStr("Invalid file size");
return false;
}
if(end[0] == 'M')
val *= 1024*1024;
if(end[0] == 'k')
val *= 1024;
m_maxFileSize = val;
return true;
}
bool
FileLogHandler::setMaxFiles(const BaseString &files) {
char *end;
long val = strtol(files.c_str(), &end, 0);
if(files.c_str() == end || val < 1)
{
setErrorStr("Invalid maximum number of files");
return false;
}
m_maxNoFiles = val;
return true;
}
bool
FileLogHandler::checkParams() {
if(m_pLogFile == NULL)
{
setErrorStr("Log file cannot be null.");
return false;
}
return true;
}
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