src/server/Logger.cxx

   1 /***************************************************************************
   2  *   Copyright (C) 2007 by www.databasecache.com                           *
   3  *   Contact: praba_tuty@databasecache.com                                 *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15   ***************************************************************************/
  16 #include<Debug.h>
  17 int Logger::createLogRecord(LogLevel level, char* filename,
  18                               int lineNo, char* message, char **buffer)
  19 {
  20     char    tempBuffer[25];
  21     struct timeval timeStamp;
  22     os::gettimeofday(&timeStamp);
  23     struct tm*      tempTm = os::localtime(&timeStamp.tv_sec);
  24     strftime(tempBuffer, 25, "%d/%m/%Y %H:%M:%S.", tempTm);
  25     snprintf(*buffer, MAX_TRACE_LOG_LENGTH, "%s::%s:%d::%s::%d::%d::%lu::%s\n",
  26         levelNames[level], tempBuffer, timeStamp.tv_usec,
  27         filename, lineNo,
  28         os::getpid(),
  29         os::getthrid(),
  30         message);
  31     return 0;
  32 }
  33
  34 //TODO::Multiple files: If it exceeeds some configured size, it rolls over to
  35 //next with suffix like file.1, file.2, ...
  36 int Logger::log(LogLevel level, char* filename,
  37                   int lineNo, char *format, ...)
  38 {
  39     if (LogOff == configLevel) return 0;
  40     if (level <= configLevel )
  41     {
  42         va_list ap;
  43         char mesgBuf[1024];
  44         va_start(ap, format);
  45
  46         int err = ::vsnprintf(mesgBuf, sizeof(mesgBuf), format,ap);
  47         if(err < 0) {
  48             return err;
  49         }
  50         char *buffer = new char[MAX_TRACE_LOG_LENGTH];
  51         createLogRecord(level, filename, lineNo, mesgBuf, &buffer);
  52         //TODO::There is some issue in locking. Need to look into this and then
  53         //uncomment the below lines
  54         //int ret = mutex_.tryLock(5, 100000);
  55         int ret = 0;
  56         if (ret != 0)
  57         {
  58             printError(ErrLockTimeOut,"Unable to acquire logger Mutex");
  59             delete[] buffer;
  60             return -1;
  61         }
  62         os::write(fdLog, buffer, strlen(buffer));
  63         os::fsync(fdLog);
  64         //mutex_.releaseLock();
  65         delete[] buffer;
  66     }
  67     return 0;
  68 }
  69
  70 DbRetVal Logger::startLogger(char *filename, bool isCreate)
  71 {
  72     char file[256];
  73     int i =0;
  74     if (isCreate)
  75     {
  76         while (true)
  77         {
  78             sprintf(file, "%s.%d", filename, i);
  79             //check if file exists. If not create it
  80             if (::access(file, F_OK) != 0 ) break;
  81             i++;
  82         }
  83         fdLog = os::openFile(file, fileOpenCreat,0);
  84     }
  85     else
  86     {
  87         int newlyCreatedID =0;
  88         while (true)
  89         {
  90             sprintf(file, "%s.%d", filename, i);
  91             //check if file exists. If not create it
  92             if (::access(file, F_OK) != 0 ) break;
  93             newlyCreatedID = i;
  94             i++;
  95         }
  96         sprintf(file, "%s.%d", filename, newlyCreatedID );
  97         fdLog = os::openFile(file, fileOpenAppend,0);
  98     }
  99     if (fdLog == -1)
 100     {
 101         printError(ErrSysInit,"Unable to create log file. Check whether server started\n");
 102         return ErrSysInit;
 103     }
 104     //TODO::get this value from configuration file
 105     configLevel= LogFinest;
 106     return OK;
 107 }
 108
 109 void Logger::stopLogger()
 110 {
 111     os::closeFile(fdLog);
 112 }