Full Page Cache : Enterprise PageCache Model Validator

How to work/flow Enterprise_PageCache_Model_Container_Placeholder class in Magento?
(Magento EE 1.13.0.2)Object: $this => Enterprise_PageCache_Model_Validator

Following constants is used in above class :

• const XML_PATH_DEPENDENCIES_CHANGE = ‘adminhtml/cache/dependency/change’;
• const XML_PATH_DEPENDENCIES_DELETE = ‘adminhtml/cache/dependency/delete’;

Following variables is used in above class :

• Data change dependency :
  protected $_dataChangeDependency = array(
  ‘Mage_Catalog_Model_Product’,
  ‘Mage_Catalog_Model_Category’,
  ‘Mage_Catalog_Model_Resource_Eav_Attribute’,
  ‘Mage_Tag_Model_Tag’,
  ‘Mage_Review_Model_Review’,
  ‘Enterprise_Cms_Model_Hierarchy_Node’,
  ‘Enterprise_Banner_Model_Banner’,
  ‘Mage_Core_Model_Store_Group’,
  ‘Mage_Poll_Model_Poll’,
  );
• Data delete dependency :
  protected $_dataDeleteDependency = array(
  ‘Mage_Catalog_Model_Category’,
  ‘Mage_Catalog_Model_Resource_Eav_Attribute’,
  ‘Mage_Tag_Model_Tag’,
  ‘Mage_Review_Model_Review’,
  ‘Enterprise_Cms_Model_Hierarchy_Node’,
  ‘Enterprise_Banner_Model_Banner’,
  ‘Mage_Core_Model_Store_Group’,
  ‘Mage_Poll_Model_Poll’,
  );

Functions in class Enterprise_PageCache_Model_Validator
There are 10 functions are present in class Enterprise_PageCache_Model_Validator

• /**Mark full page cache as invalidated
  * @deprecated after 1.12.0.2 **/
  protected function _invelidateCache(){}
• /** Mark full page cache as invalidated **/
  protected function _invalidateCache()
  {
  Mage::app()->getCacheInstance()->invalidateType(‘full_page’);
  }
• /**Get list of all classes related with object instance
  * @param $object * @return array*/
  protected function _getObjectClasses($object){}
• /**Check if during data change was used some model related with page cache and invalidate cache
  * @param mixed $object
  * @return Enterprise_PageCache_Model_Validator*/
  public function checkDataChange($object){}
• /**Check if during data delete was used some model related with page cache and invalidate cache*/
  * @param mixed $object
  * @return Enterprise_PageCache_Model_Validator
  public function checkDataDelete($object){}
• /**Clean cache by entity tags
  * @param Mage_Core_Model_Abstract $object
  * @return Enterprise_PageCache_Model_Validator**/
  public function cleanEntityCache(Mage_Core_Model_Abstract $object) {}
• /** Retrieves cache instance
  * @return Mage_Core_Model_Cache **/
  protected function _getCacheInstance()
  {
  return Enterprise_PageCache_Model_Cache::getCacheInstance();
  }
• /**Returns array of data change dependencies from config
  *@return array **/
  protected function _getDataChangeDependencies()
  {
  return $this->_getDataDependencies(self::XML_PATH_DEPENDENCIES_CHANGE);
  }
• /**Returns array of data delete dependencies from config
  * @return array*/
  protected function _getDataDeleteDependencies()
  {
  return $this->_getDataDependencies(self::XML_PATH_DEPENDENCIES_DELETE);
  }
• /** Get data dependencies by xpath
  * @param string $xpath * @return array */
  protected function _getDataDependencies($xpath)
  {
  $node = Mage::getConfig()->getNode($xpath);
  return (!$node)? array() : array_values($node->asArray());
  }

Variation of sample data for different pages (Homepage, Product Listing Page, Product Info Page)

Variables: These values for Homepage

URL : https://localhost/oscp-store/mage-ent-test/index.php

• $_dataChangeDependency = Array [9]0 = Mage_Catalog_Model_Product
  1 = Mage_Catalog_Model_Category
  2 = Mage_Catalog_Model_Resource_Eav_Attribute
  3 = Mage_Tag_Model_Tag
  4 = Mage_Review_Model_Review
  5 = Enterprise_Cms_Model_Hierarchy_Node
  6 = Enterprise_Banner_Model_Banner
  7 = Mage_Core_Model_Store_Group
  8 = Mage_Poll_Model_Poll
• $_dataDeleteDependency = Array [8]0 = Mage_Catalog_Model_Category
  1 = Mage_Catalog_Model_Resource_Eav_Attribute
  2 = Mage_Tag_Model_Tag
  3 = Mage_Review_Model_Review
  4 = Enterprise_Cms_Model_Hierarchy_Node
  5 = Enterprise_Banner_Model_Banner
  6 = Mage_Core_Model_Store_Group
  7 = Mage_Poll_Model_Poll

Note : It gives same output for Product Listing page and Product Info page