public function getValue($forceRefresh = false) {
		if ($this->_value === null || $forceRefresh) {
			if ($this->name === null) {
				throw new InvalidConfigException(get_class($this)." requires a name!");
			}
			$this->_value = (int) $this->getConnection()->getSlave()->get($this->name);
		}
		return $this->_value;
	}