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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2012 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
// $Id: Cache.class.php 2702 2012-02-02 12:35:01Z liu21st $
/**
+------------------------------------------------------------------------------
* 缓存管理类
+------------------------------------------------------------------------------
* @category Think
* @package Think
* @subpackage Util
* @author liu21st <liu21st@gmail.com>
* @version $Id: Cache.class.php 2702 2012-02-02 12:35:01Z liu21st $
+------------------------------------------------------------------------------
*/
class Cache {
/**
+----------------------------------------------------------
* 是否连接
+----------------------------------------------------------
* @var string
* @access protected
+----------------------------------------------------------
*/
protected $connected ;
/**
+----------------------------------------------------------
* 操作句柄
+----------------------------------------------------------
* @var string
* @access protected
+----------------------------------------------------------
*/
protected $handler ;
/**
+----------------------------------------------------------
* 缓存连接参数
+----------------------------------------------------------
* @var integer
* @access protected
+----------------------------------------------------------
*/
protected $options = array();
/**
+----------------------------------------------------------
* 连接缓存
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @param string $type 缓存类型
* @param array $options 配置数组
+----------------------------------------------------------
* @return object
+----------------------------------------------------------
* @throws ThinkExecption
+----------------------------------------------------------
*/
public function connect($type='',$options=array()) {
if(empty($type)) $type = C('DATA_CACHE_TYPE');
$type = strtolower(trim($type));
$class = 'Cache'.ucwords($type);
if(is_file(CORE_PATH.'Driver/Cache/'.$class.'.class.php')) {
// 内置驱动
$path = CORE_PATH;
}else{ // 扩展驱动
$path = EXTEND_PATH;
}
if(require_cache($path.'Driver/Cache/'.$class.'.class.php'))
$cache = new $class($options);
else
throw_exception(L('_CACHE_TYPE_INVALID_').':'.$type);
return $cache;
}
public function __get($name) {
return $this->get($name);
}
public function __set($name,$value) {
return $this->set($name,$value);
}
public function __unset($name) {
$this->rm($name);
}
public function setOptions($name,$value) {
$this->options[$name] = $value;
}
public function getOptions($name) {
return $this->options[$name];
}
/**
+----------------------------------------------------------
* 取得缓存类实例
+----------------------------------------------------------
* @static
* @access public
+----------------------------------------------------------
* @return mixed
+----------------------------------------------------------
*/
static function getInstance() {
$param = func_get_args();
return get_instance_of(__CLASS__,'connect',$param);
}
// 队列缓存
protected function queue($key) {
static $_handler = array(
'file'=>array('F','F'),
'xcache'=>array('xcache_get','xcache_set'),
'apc'=>array('apc_fetch','apc_store'),
);
$queue = isset($this->options['queue'])?$this->options['queue']:'file';
$fun = $_handler[$queue];
$value = $fun[0]('think_queue');
if(!$value) {
$value = array();
}
// 进列
array_push($value,$key);
if(count($value) > $this->options['length']) {
// 出列
$key = array_shift($value);
// 删除缓存
$this->rm($key);
}
return $fun[1]('think_queue',$value);
}
}
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