includes/ParserCache.php

   1 <?php
   2
   3 class ParserCache
   4 {
   5         function getKey( &$article, &$user ) {
   6                 global $wgDBname;
   7                 $hash = $user->getPageRenderingHash();
   8                 $pageid = intval( $article->getID() );
   9                 $key = "$wgDBname:pcache:idhash:$pageid-$hash";
  10                 return $key;
  11         }
  12
  13         function get( &$article, &$user ) {
  14                 global $wgMemc, $wgCacheEpoch;
  15                 $fname = "ParserCache::get";
  16                 wfProfileIn( $fname );
  17
  18                 $hash = $user->getPageRenderingHash();
  19                 $pageid = intval( $article->getID() );
  20                 $key = $this->getKey( $article, $user );
  21                 $value = $wgMemc->get( $key );
  22                 if ( $value ) {
  23                         # Delete if article has changed since the cache was made
  24                         $touched = $article->getTouched();
  25                         if ( $value->getTouched() != $touched || $touched > $wgCacheEpoch ) {
  26                                 $wgMemc->delete( $key );
  27                                 $value = false;
  28                         }
  29                 } else {
  30                         $value = false;
  31                 }
  32
  33                 wfProfileOut( $fname );
  34                 return $value;
  35         }
  36
  37         function save( $parserOutput, &$article, &$user ){
  38                 global $wgMemc;
  39                 $key = $this->getKey( $article, $user );
  40                 $touched = $article->getTouched();
  41                 $parserOutput->setTouched( $touched );
  42                 $parserOutput->mText .= "\n<-- Saved in parser cache with key $key and timestamp $touched -->\n";
  43
  44                 if( $parserOutput->containsOldMagic() ){
  45                         $expire = 3600; # 1 hour
  46                 } else {
  47                         $expire = 7*86400; # 7 days
  48                 }
  49
  50                 $wgMemc->set( $key, $parserOutput, $expire );
  51         }
  52
  53 }
  54
  55
  56 ?>