\ticky\cache\drivermemcached

<?php

namespace ticky\cache\driver;

use ticky\cache\contract;

class memcached extends contract {

    //todo
    protected $link = null;
    protected $config = array(
        'host' => '127.0.0.1', // memcache主机
        'port' => 11211, // memcache端口
        'timeout' => 0, // 超时时间(秒)
        'expire' => 0, // 有效期(秒)
        'persistent' => false, // 是否长连接
        'prefix' => '', // 前缀
    );

    /**
     * 构造函数
     * @param array $config
     * @access public
     */
    public function __construct($config = array()) {
        if (!extension_loaded('memcache')) {
            showmsg('not support: memcache', 'stop');
        }
        if (!empty($config)) {
            $this->config = array_merge($this->config, $config);
        }
        $this->link = new Memcache();
        $this->link->addServer($this->config['host'], $this->config['port'], $this->config['persistent']);
    }

    public function exists($key) {
        $file = $this->_file($key);
        if (!is_file($file)) {
            return false;
        }
        return true;
    }

    /**
     * 设置数据
     * @param	string   $name
     * @param	void 	 $value
     * @param	string   $expire
     * @return  void
     */
    public function set($name, $value, $expire = null) {
        $expire = $expire ? $expire : $this->config['expire'];
        if (is_array($value)) {
            $value = json_encode($value);
        }
        return $this->link->set($name, $value, false, $expire);
    }

    /**
     * 获取数据
     * @param	string   $name
     * @return  string
     */
    public function get($name) {
        $value = $this->link->get($name);
        $value_serl = json_decode($value, true);
        if (is_array($value_serl)) {
            return $value_serl;
        }
        return $value;
    }

    /**
     * 删除数据
     * @param	string   $name
     * @return  void
     */
    public function delete($name) {
        return $this->link->delete($name);
    }

    /**
     * 清空数据
     * @return  void
     */
    public function clean() {
        return $this->link->flush();
    }

}