create new cache type in magento

To create new cache type in magento, only add this code to config.xml of your extensions

Your Custom Cache Label
Description of cache type.
YOUR_CACHE_TAG

when you want use your cache type. we can use this code below.

$cacheGroup = 'your_cache_type';
$useCache = Mage::app()->useCache($cacheGroup);
if (true === $useCache) {
    // Cache is active
} else {
    // Cache is not active
}

so, now, we have 1 problem , that is : how to refresh all cache associate with that cache type. this is 1 solution to do it: the first , i create a observer for event : adminhtml_cache_refresh_type. Can you add this code in global tag in config.xml

singleton
YourNameSpace_YourExtenstion_Model_Observer
adminhtml_cache_refresh_type

now, we can create file name as: Observer.php follow this path: YourNameSpace/YourExtenstion/Model/Observer.php and add this code in to Observer.php

class YourNameSpace_YourExtenstion_Model_Observer
{
 public function adminhtml_cache_refresh_type($observer)
 {
  $request = Mage::app()->getRequest()->getPost('types');
  if(in_array('ee_content', $request))
  {
   $cache = Mage::app()->getCache();
   $tags = $cache->getTags();
   $ee_content = '';
   foreach($tags as $tag)
   {
    if(strpos($tag, 'ee_content'))
    {
     $ee_content = $tag;
    }
   }
   if($ee_content !='')
   {


    $ids = $cache->getIdsMatchingAnyTags(array($ee_content));
    foreach($ids as $id)
    {
     $cache->remove($id);
    }
   }

  }
 }
}