src/applications/diviner/cache/DivinerDiskCache.php

   1 <?php
   2
   3 abstract class DivinerDiskCache extends Phobject {
   4
   5   private $cache;
   6
   7   public function __construct($cache_directory, $name) {
   8     $dir_cache = id(new PhutilDirectoryKeyValueCache())
   9       ->setCacheDirectory($cache_directory);
  10     $profiled_cache = id(new PhutilKeyValueCacheProfiler($dir_cache))
  11       ->setProfiler(PhutilServiceProfiler::getInstance())
  12       ->setName($name);
  13     $this->cache = $profiled_cache;
  14   }
  15
  16   protected function getCache() {
  17     return $this->cache;
  18   }
  19
  20   public function delete() {
  21     $this->getCache()->destroyCache();
  22     return $this;
  23   }
  24
  25   /**
  26    * Convert a long-form hash key like `ccbbaaaaaaaaaaaaaaaaaaaaaaaaaaaaN` into
  27    * a shortened directory form, like `cc/bb/aaaaaaaaN`. In conjunction with
  28    * @{class:PhutilDirectoryKeyValueCache}, this gives us nice directories
  29    * inside `.divinercache` instead of a million hash files with huge names at
  30    * the top level.
  31    */
  32   protected function getHashKey($hash) {
  33     return implode(
  34       '/',
  35       array(
  36         substr($hash, 0, 2),
  37         substr($hash, 2, 2),
  38         substr($hash, 4, 8),
  39       ));
  40   }
  41
  42 }