code: public function getLog()
      {
          if (!isset($this->_log)) {
              $this->_log = new DataInterfaceLog();
              if (!empty($this->interface)) {
                  $this->_log->data_interface_id = $this->interface->interfaceObject->id;
              }
              $this->_log->status = 'running';
              $this->_log->started = date("Y-m-d G:i:s");
              $this->_log->peak_memory = memory_get_usage();
          }
  
          return $this->_log;
      }
docs: Get log.