/**

* 工厂方法模式

* -------------

* @author zhangqian

* @version v1.0

*/

//缓存接口

interface cache {

public function init($conf);

public function setVal($key , $val);

public function getVal($key);

public function delVal($key);

public function autoIncreament($key);

}

//mem

class mymemCache implements cache {

//mymem连接

public function init($conf)

{

echo '初始化mymem';

}

public function setVal($key , $val)

{

echo 'mem设置值';

}

public function getVal($key)

{

echo 'mem获取值';

}

public function delVal($key)

{

echo 'mem删除值';

}

public function autoIncreament($key)

{

echo 'mem自增';

}

}

//redis

class redisCache implements cache {

//redis连接

public function init($arr)

{

echo '初始化redis';

}

public function setVal($key , $val)

{

echo 'redis设置值';

}

public function getVal($key)

{

echo 'redis获取值';

}

public function delVal($key)

{

echo 'redis删除值';

}

public function autoIncreament($key)

{

echo 'redis自增';

}

}

class cacheFactory

{

private static $obj;

private static $type;

private static $conf;

private static $allowtype = array('mymem','redis');

private static function getConfig()

{

//include_once('config.php');加载配置文件 获取缓存的类型 及缓存的配置参数

global $_SC;

self::$type = $_SC['cachetype'];//做空值的判断

self::$conf = $_SC['cacheconf'];//做空值的判断

}

//外部调用创建缓存对象

public static function CreateOperation(){

self::getConfig();

try

{

$error = '未知的缓存类型';

if(in_array(self::$type , self::$allowtype))

{

$type = self::$type.'Cache';

self::$obj = new $type;

self::$obj->init(self::$conf);//连接

}

else

throw new Exception($error);

}

catch (Exception $e) {

echo 'Caught exception: ', $e->getMessage(), "\n";

exit;

}

return self::$obj;

}

}

$_SC = array();

$_SC['cachetype'] = 'redis';//mymem

$_SC['cacheconf'] = array();

$cache = cacheFactory::CreateOperation();

$cache->setVal('a',1);

echo '

';

$a = $cache->getVal('a');

echo '

';

$cache->delVal('a');

?>