GenericCache.inc.php

<?php
 
// Pseudotype to represent a cache miss
class generic_cache_miss {
}
 
class GenericCache {
   var $context;
 
   var $cacheId;
 
   var $cacheMiss;
 
   var $fallback;
 
   function __construct($context, $cacheId, $fallback) {
      $this->context = $context;
      $this->cacheId = $cacheId;
      $this->fallback = $fallback;
      $this->cacheMiss = new generic_cache_miss;
   }
 
   function get($id) {
      $result = $this->getCache($id);
      if (is_object($result) && get_class($result) === 'generic_cache_miss') {
         $result = call_user_func_array($this->fallback, array($this, $id));
      }
      return $result;
   }
 
   function set($id, $value) {
      return $this->setCache($id, $value);
   }
 
   function flush() {
   }
 
   function setEntireCache($contents) {
      $this->flush();
      foreach ($contents as $id => $value) {
         $this->setCache($id, $value);
      }
   }
 
   function getCache($id) {
      return $this->cacheMiss;
   }
 
   function setCache($id, $value) {
   }
 
   function close() {
   }
 
   function getContext() {
      return $this->context;
   }
 
   function getCacheId() {
      return $this->cacheId;
   }
 
   function getCacheTime() {
      // Since it's not really cached, we'll consider it to have been cached just now.
      return time();
   }
}