kdc_proxy Log Registration API

Prototype

uint32_t SetLogCallback(SetLogCallbackFunc cb);

Parameters

The connector needs to provide a four-parameter log function, specifying the severity level, log message, file name, and line number, respectively.

Return Values

Precautions

You are advised to call this API at the very beginning to ensure that kdc_proxy can log the subsequent runtime status.

Examples

1. Prepare the connector log function.

   static void stress_log(int32_t severity, const char *msg, const char *file, int32_t line)
   {
   const char *level;
   switch (severity) {
   case 0: level = "DEBUG"; break;
   case 1: level = "INFO "; break;
   case 2: level = "WARN "; break;
   default: level = "ERROR"; break;
   }
   struct timespec ts;
   clock_gettime(CLOCK_REALTIME, &ts);
   struct tm *tm_info = localtime(&ts.tv_sec);
   char timestamp[32];
   strftime(timestamp, sizeof(timestamp), "%Y-%m-%d %H:%M:%S", tm_info);
   int millis = (int)(ts.tv_nsec / 1000000);
   if (g_worker_log) {
   fprintf(g_worker_log, "[%s.%03d] [%s] [kdc_proxy] [%s:%d] %s\n",
   timestamp, millis, level, file, line, msg);
   fflush(g_worker_log);
   }
   }

2. Call the API to set the log callback function for kdc_proxy (only once).

   uint32_t ret = SetLogCallback(stress_log);
   if (ret != 0) {
   // Handle the error.
   return;
   }