includes/objectcache/ObjectCache.php

   1 <?php
   2 /**
   3  * Functions to get cache objects
   4  *
   5  * @file
   6  * @ingroup Cache
   7  */
   8
   9 global $wgCaches;
  10 $wgCaches = array();
  11
  12 /**
  13  * Get a cache object.
  14  * @param $inputType Integer: cache type, one the the CACHE_* constants.
  15  *
  16  * @return BagOStuff
  17  */
  18 function &wfGetCache( $inputType ) {
  19         global $wgCaches, $wgMemCachedServers, $wgMemCachedDebug, $wgMemCachedPersistent;
  20         $cache = false;
  21
  22         if ( $inputType == CACHE_ANYTHING ) {
  23                 reset( $wgCaches );
  24                 $type = key( $wgCaches );
  25                 if ( $type === false || $type === CACHE_NONE ) {
  26                         $type = CACHE_DB;
  27                 }
  28         } else {
  29                 $type = $inputType;
  30         }
  31
  32         if ( $type == CACHE_MEMCACHED ) {
  33                 if ( !array_key_exists( CACHE_MEMCACHED, $wgCaches ) ) {
  34                         $wgCaches[CACHE_MEMCACHED] = new MemCachedClientforWiki(
  35                                 array('persistant' => $wgMemCachedPersistent, 'compress_threshold' => 1500 ) );
  36                         $wgCaches[CACHE_MEMCACHED]->set_servers( $wgMemCachedServers );
  37                         $wgCaches[CACHE_MEMCACHED]->set_debug( $wgMemCachedDebug );
  38                 }
  39                 $cache =& $wgCaches[CACHE_MEMCACHED];
  40         } elseif ( $type == CACHE_ACCEL ) {
  41                 if ( !array_key_exists( CACHE_ACCEL, $wgCaches ) ) {
  42                         if ( function_exists( 'eaccelerator_get' ) ) {
  43                                 $wgCaches[CACHE_ACCEL] = new eAccelBagOStuff;
  44                         } elseif ( function_exists( 'apc_fetch') ) {
  45                                 $wgCaches[CACHE_ACCEL] = new APCBagOStuff;
  46                         } elseif( function_exists( 'xcache_get' ) ) {
  47                                 $wgCaches[CACHE_ACCEL] = new XCacheBagOStuff();
  48                         } elseif( function_exists( 'wincache_ucache_get' ) ) {
  49                                 $wgCaches[CACHE_ACCEL] = new WinCacheBagOStuff();
  50                         } else {
  51                                 $wgCaches[CACHE_ACCEL] = false;
  52                         }
  53                 }
  54                 if ( $wgCaches[CACHE_ACCEL] !== false ) {
  55                         $cache =& $wgCaches[CACHE_ACCEL];
  56                 }
  57         } elseif ( $type == CACHE_DBA ) {
  58                 if ( !array_key_exists( CACHE_DBA, $wgCaches ) ) {
  59                         $wgCaches[CACHE_DBA] = new DBABagOStuff;
  60                 }
  61                 $cache =& $wgCaches[CACHE_DBA];
  62         }
  63
  64         if ( $type == CACHE_DB || ( $inputType == CACHE_ANYTHING && $cache === false ) ) {
  65                 if ( !array_key_exists( CACHE_DB, $wgCaches ) ) {
  66                         $wgCaches[CACHE_DB] = new SqlBagOStuff('objectcache');
  67                 }
  68                 $cache =& $wgCaches[CACHE_DB];
  69         }
  70
  71         if ( $cache === false ) {
  72                 if ( !array_key_exists( CACHE_NONE, $wgCaches ) ) {
  73                         $wgCaches[CACHE_NONE] = new FakeMemCachedClient;
  74                 }
  75                 $cache =& $wgCaches[CACHE_NONE];
  76         }
  77
  78         return $cache;
  79 }
  80
  81 /** Get the main cache object */
  82 function &wfGetMainCache() {
  83         global $wgMainCacheType;
  84         $ret =& wfGetCache( $wgMainCacheType );
  85         return $ret;
  86 }
  87
  88 /** Get the cache object used by the message cache */
  89 function &wfGetMessageCacheStorage() {
  90         global $wgMessageCacheType;
  91         $ret =& wfGetCache( $wgMessageCacheType );
  92         return $ret;
  93 }
  94
  95 /** Get the cache object used by the parser cache */
  96 function &wfGetParserCacheStorage() {
  97         global $wgParserCacheType;
  98         $ret =& wfGetCache( $wgParserCacheType );
  99         return $ret;
 100 }