/**
* Redis缓存操作
* @author hxm
* @version 1.0
* @since 2015.05.04
*/
class RCache extends Object implements CacheFace
{
private $redis = null; //redis对象
private $sId = 1; //servier服务ID
private $con = null;//链接资源
/**
* 初始化Redis
*
* @return Object
*/
public function __construct()
{
if ( !class_exists('Redis') )
{
throw new QException('PHP extension does not exist: Redis');
}
$this->redis = new Redis();
}
/**
* 链接memcahce服务
*
* @access private
* @param string $key 关键字
* @param string $value 缓存内容
* @return array
*/
private function connect( $sid )
{
$file = $this->CacheFile();
require $file;
if(! isset($cache) )
{
throw new QException('缓存配置文件不存在'.$file);
}
$server = $cache[$this->cacheId];
$sid = isset($sid) == 0 ? $this->sId : $sid;//memcache服务选择
if ( ! $server[$sid])
{
throw new QException('当前操作的缓存服务器配置文件不存在');
}
$host = $server[$sid]['host'];
$port = $server[$sid]['port'];
try {
$this->redis->connect( $host , $port );
} catch (Exception $e) {
exit('memecache连接失败，错误信息：'. $e->getMessage());
}
}
/**
* 写入缓存
*
* @access private
* @param string $key 关键字
* @param string $value 缓存内容
* @return array
*/
public function set( $key , $value , $sid , $expire = 0)
{
$data = $this->get($key , $sid); //如果已经存在key值
if( $data )
{
return $this->redis->getset( $key , $value);
} else {
return $this->redis->set( $key , $value);
}
}
/**
* 读取缓存
*
* @access private
* @param string $key 关键字
* @param int $sid 选择第几台memcache服务器
* @return array
*/
public function get( $key , $sid)
{
$this->connect( $sid );
return $this->redis->get($key);
}
/**
* 清洗(删除)已经存储的所有的元素
*
* @access private
* @return array
*/
public function flush()
{
$this->connect();
return $this->redis->flushall();
}
/**
* 删除缓存
*
* @access private
* @param string $key 关键字
* @param int $sid 选择第几台memcache服务器
* @return array
*/
public function remove( $key , $sid)
{
$this->connect();
return $this->redis->del($key);
}
/**
* 析构函数
* 最后关闭memcache
*/
public function __destruct()
{
if($this->redis)
{
$this->redis->close();
}
}
}