How to selectively clear the cache (using tags or another option) with the Memchached backend and Zend Framework

Question

We use Memcached and Zend Framework in our web project. Now we need to clean the cache selectively using tags, as specified in the Zend_Cache API .

Unfortunately, memcached does not support tags .

I found these workarounds:

• Memcached-tag project . Has anyone tested it? How to implement it with Zend?
• Use wildchards, as in this question , but it seems a bit confusing, less transparent, and harder to implement with Zend.
• Use this implementation, or this one , to support tags in Memcached, despite the flaws.
• Any other option?

Thanks in advance

Answer 1

You're right. Memcache does not support tags.

You can use a different key value to implement the tag for memcache.

EX:

$this->objCache->save($arrResults, $strKey,array($strMyTag),$intCacheTime) // note : array($strMyTag) don't work for Memcache MemcacheTag::setTag($strKey, $strMyTag) // our work around 

About the setTag and MemcacheTag method:

 function setTag($strKey,$strTag){ $arrKey = $cacheOjb->get($strTag); $arrKey[]= $strKey; } function deleteCacheWithTag($strTag){ $arrKey = $cacheOjb->get($strTag); foreach ($arrKey as $strKey){ $objCache->delete($strKey); } } 

This work is pretty simple and works for my projects.

* Note: these codes need modification; sorry for posting in a hurry