vyants\daemon\DaemonController::runDaemon PHP Method

    public final function runDaemon($job)
    {
        if ($this->isMultiInstance) {
            $this->flushLog();
            $pid = pcntl_fork();
            if ($pid == -1) {
                return false;
            } elseif ($pid !== 0) {
                static::$currentJobs[$pid] = true;
                return true;
            } else {
                $this->cleanLog();
                $this->renewConnections();
                //child process must die
                $this->trigger(self::EVENT_BEFORE_JOB);
                $status = $this->doJob($job);
                $this->trigger(self::EVENT_AFTER_JOB);
                if ($status) {
                    $this->halt(self::EXIT_CODE_NORMAL);
                } else {
                    $this->halt(self::EXIT_CODE_ERROR, 'Child process #' . $pid . ' return error.');
                }
            }
        } else {
            $this->trigger(self::EVENT_BEFORE_JOB);
            $status = $this->doJob($job);
            $this->trigger(self::EVENT_AFTER_JOB);
            return $status;
        }
    }