Resque\Job::getInstance PHP Метод

    public function getInstance()
    {
        if (!is_null($this->instance)) {
            return $this->instance;
        }
        if (!class_exists($this->class)) {
            throw new \RuntimeException('Could not find job class "' . $this->class . '"');
        }
        if (!method_exists($this->class, $this->method) or !is_callable(array($this->class, $this->method))) {
            throw new \RuntimeException('Job class "' . $this->class . '" does not contain a public "' . $this->method . '" method');
        }
        $class = new \ReflectionClass($this->class);
        if ($class->isAbstract()) {
            throw new \RuntimeException('Job class "' . $this->class . '" cannot be an abstract class');
        }
        $instance = $class->newInstance();
        return $this->instance = $instance;
    }