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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: CacheMemcache.class.php 2728 2012-02-12 04:12:51Z liu21st $
/**
+-------------------------------------
* Memcache缓存驱动类
+-------------------------------------
*/
class CacheMemcache extends Cache {
/**
+----------------------------------------------------------
* 架构函数
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
*/
function __construct($options='') {
if ( !extension_loaded('memcache') ) {
throw_exception(L('_NOT_SUPPERT_').':memcache');
}
if(empty($options)) {
$options = array (
'host' => C('MEMCACHE_HOST') ? C('MEMCACHE_HOST') : '127.0.0.1',
'port' => C('MEMCACHE_PORT') ? C('MEMCACHE_PORT') : 11211,
'timeout' => C('DATA_CACHE_TIMEOUT') ? C('DATA_CACHE_TIMEOUT') : false,
'persistent' => false,
'expire' =>C('DATA_CACHE_TIME'),
'length' =>0,
);
}
$this->options = $options;
$func = $options['persistent'] ? 'pconnect' : 'connect';
$this->handler = new Memcache;
$this->connected = $options['timeout'] === false ?
$this->handler->$func($options['host'], $options['port']) :
$this->handler->$func($options['host'], $options['port'], $options['timeout']);
}
/**
+----------------------------------------------------------
* 是否连接
+----------------------------------------------------------
* @access private
+----------------------------------------------------------
* @return boolen
+----------------------------------------------------------
*/
private function isConnected() {
return $this->connected;
}
/**
+----------------------------------------------------------
* 读取缓存
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @param string $name 缓存变量名
+----------------------------------------------------------
* @return mixed
+----------------------------------------------------------
*/
public function get($name) {
N('cache_read',1);
return $this->handler->get($name);
}
/**
+----------------------------------------------------------
* 写入缓存
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @param string $name 缓存变量名
* @param mixed $value 存储数据
* @param integer $expire 有效时间（秒）
+----------------------------------------------------------
* @return boolen
+----------------------------------------------------------
*/
public function set($name, $value, $expire = null) {
N('cache_write',1);
if(is_null($expire)) {
$expire = $this->options['expire'];
}
if($this->handler->set($name, $value, 0, $expire)) {
if($this->options['length']>0) {
// 记录缓存队列
$this->queue($name);
}
return true;
}
return false;
}
/**
+----------------------------------------------------------
* 删除缓存
*
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @param string $name 缓存变量名
+----------------------------------------------------------
* @return boolen
+----------------------------------------------------------
*/
public function rm($name, $ttl = false) {
return $ttl === false ?
$this->handler->delete($name) :
$this->handler->delete($name, $ttl);
}
/**
+----------------------------------------------------------
* 清除缓存
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @return boolen
+----------------------------------------------------------
*/
public function clear() {
return $this->handler->flush();
}
}
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