<?php
	/**
	* @desc 
	* 
	* memcache class
	*/
	class Mcache {
		
		public $is_compress = false;
		public $expire = false;
		public $cache;
		
		public function Mcache($g_memcahe_conf) {
			$this->is_compress = COMPRESSED ? MEMCACHE_COMPRESSED : false;
			$this->expire   = MEM_EXPIRES ? MEM_EXPIRES : false;
			$this->cache	= new Memcache();
			$this->connect($g_memcahe_conf);
		}
		/**
		* @desc 
		*  添加Memcache地址， 打开一个到Memcache的连接
		*/
		public function connect($g_memcahe_conf) {
			
			// multi-server config
			if(!empty($g_memcahe_conf[0])){
				foreach ($g_memcahe_conf as $conf){
					$this->cache->addServer($conf['server'], $conf['port'], $conf['per'], $conf['weight'], $conf['timeout'],  $conf['retry']);
				}				
			}
			// single server config
			else{
				$this->cache->addServer(
					$g_memcahe_conf['server'], 
					$g_memcahe_conf['port'], 
					$g_memcahe_conf['per'], 
					$g_memcahe_conf['weight'], 
					$g_memcahe_conf['timeout'], 
					$g_memcahe_conf['retry']);
			}
		}
		/**
		* @desc 
		*  向Memcache添加一个值，如果已经存在，则覆写
		*/
		public function set($key, $val) {
			return $this->cache->set($key, $val, $this->is_compress,$this->expire);
		}

		/**
		* @desc 
		* 添加一个值，如果已经存在，则返回false
		*/
		public function add($key, $val) {
			return $this->cache->add($key, $val, $this->is_compress,$this->expire);
		}
		/**
		* @desc 
		* 替换一个已经存在Memcache服务器上的项目（功能类似Memcache::set）
		*/
		public function replace($key, $val) {
			return $this->cache->replace($key, $val, $this->is_compress,$this->expire);
			
		}
		/**
		* @desc 
		* 删除一个Memcache上的key值
		*/
		public function del($key) {
			return $this->cache->delete($key);
		}
		/**
		* @desc 
		* 刷新所有Memcache上保存的项目
		*/
		public function flush() {
			return $this->cache->flush();
		}
		/**
		* @desc 
		* 从Memcache上获取一个key值
		* 
		*/
		public function get($key) {
			return $this->cache->get($key);
		}
		/**
		* @desc 
		* 获取进程池中所有进程的运行系统统计
		*/
		public function getStats($par="") {
			return $this->cache->getExtendedStats($par);
		}
	}
?>