public function init()
    {
        // Build up the complete path to the heartbeat file
        $this->heartbeatFile = APPSERVER_BP . DIRECTORY_SEPARATOR . 'var' . DIRECTORY_SEPARATOR .
            'run' . DIRECTORY_SEPARATOR . self::HEARTBEAT_FILE_NAME;

        // Init the parent as well, as we have to get some mappings
        parent::init();
    }