/joomla/libraries/joomla/cache/controller/view.php
PHP | 121 lines | 57 code | 17 blank | 47 comment | 18 complexity | 018fa5c3bf2517c39adf5d7942b546c9 MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.1, BSD-3-Clause, JSON
- <?php
- /**
- * @version $Id: view.php 18013 2010-07-03 03:42:31Z infograf768 $
- * @package Joomla.Framework
- * @subpackage Cache
- * @license GNU General Public License version 2 or later; see LICENSE.txt
- */
- // No direct access
- defined('JPATH_BASE') or die;
- /**
- * Joomla! Cache view type object
- *
- * @package Joomla.Framework
- * @subpackage Cache
- * @since 1.6
- */
- class JCacheControllerView extends JCacheController
- {
- /**
- * Get the cached view data
- *
- * @param object $view The view object to cache output for
- * @param string $method The method name of the view method to cache output for
- * @param string $group The cache data group
- * @param string $id The cache data id
- * @return boolean True if the cache is hit (false else)
- * @since 1.6
- */
- public function get(&$view, $method, $id=false, $wrkarounds=true)
- {
- // If an id is not given generate it from the request
- if ($id == false) {
- $id = $this->_makeId($view, $method);
- }
- $data = false;
- $data = $this->cache->get($id);
- $locktest = new stdClass;
- $locktest->locked = null;
- $locktest->locklooped = null;
- if ($data === false) {
- $locktest = $this->cache->lock($id,null);
- // if the loop is completed and returned true the means the lock has been set
- // if looped is true try to get the cached data again; it could exist now
- if ($locktest->locked == true && $locktest->locklooped == true) {
- $data = $this->cache->get($id);
- }
- // false means that locking is either turned off or maxtime has been exceeeded, execute the view
- }
- if ($data !== false) {
- $data = unserialize(trim($data));
- if ($wrkarounds === true) {
- echo JCache::getWorkarounds($data);
- }
- else { // no workarounds, all data is stored in one piece
- echo (isset($data)) ? $data : null;
- }
- if ($locktest->locked == true) {
- $this->cache->unlock($id);
- }
- return true;
- }
- /*
- * No hit so we have to execute the view
- */
- if (method_exists($view, $method)) {
- // if previous lock failed try again
- if ($locktest->locked == false) {
- $locktest = $this->cache->lock($id);
- }
- // Capture and echo output
- ob_start();
- ob_implicit_flush(false);
- $view->$method();
- $data = ob_get_contents();
- ob_end_clean();
- echo $data;
- /*
- * For a view we have a special case. We need to cache not only the output from the view, but the state
- * of the document head after the view has been rendered. This will allow us to properly cache any attached
- * scripts or stylesheets or links or any other modifications that the view has made to the document object
- */
- $cached = array();
- $cached = $wrkarounds == true ? JCache::setWorkarounds($data) : $data;
- // Store the cache data
- $this->cache->store(serialize($cached), $id);
- if ($locktest->locked == true) {
- $this->cache->unlock($id);
- }
- }
- return false;
- }
- /**
- * Generate a view cache id.
- *
- * @param object $view The view object to cache output for
- * @param string $method The method name to cache for the view object
- * @return string MD5 Hash : view cache id
- * @since 1.6
- */
- private function _makeId(&$view, $method)
- {
- return md5(serialize(array(JCache::makeId(), get_class($view), $method)));
- }
- }