APCCache.inc.php

<?php
 
import('lib.pkp.classes.cache.GenericCache');
 
class apc_false {};
 
class APCCache extends GenericCache {
   function __construct($context, $cacheId, $fallback) {
      parent::__construct($context, $cacheId, $fallback);
   }
 
   function flush() {
      $prefix = INDEX_FILE_LOCATION . ':' . $this->getContext() . ':' . $this->getCacheId();
      $info = apc_cache_info('user');
      foreach ($info['cache_list'] as $entry) {
         if (substr($entry['info'], 0, strlen($prefix)) == $prefix) apc_delete($entry['info']);
      }
   }
 
   function getCache($id) {
      $key = INDEX_FILE_LOCATION . ':'. $this->getContext() . ':' . $this->getCacheId() . ':' . $id;
      $returner = unserialize(apc_fetch($key));
      if ($returner === false) return $this->cacheMiss;
      if (get_class($returner) === 'apc_false') $returner = false;
      return $returner;
   }
 
   function setCache($id, $value) {
      $key = INDEX_FILE_LOCATION . ':'. $this->getContext() . ':' . $this->getCacheId() . ':' . $id;
      if ($value === false) $value = new apc_false;
      apc_store($key, serialize($value));
   }
 
   function getCacheTime() {
      return null;
   }
 
   function setEntireCache($contents) {
      foreach ($contents as $id => $value) {
         $this->setCache($id, $value);
      }
   }
}