de20376cc1
As Brion points out in <https://bugzilla.wikimedia.org/show_bug.cgi?id=29747#c7>, the shared memory functions are very buggy. In fact, eAccelerator has disabled the shared memory functions by default for awhile now. I didn't touch APC, XCache or WinCache, but I imagine they suffer from the same problems.
117 lines
2.9 KiB
PHP
117 lines
2.9 KiB
PHP
<?php
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/**
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* Functions to get cache objects
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*
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* @file
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* @ingroup Cache
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*/
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class ObjectCache {
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static $instances = array();
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/**
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* Get a cached instance of the specified type of cache object.
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*
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* @param $id
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*
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* @return object
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*/
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static function getInstance( $id ) {
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if ( isset( self::$instances[$id] ) ) {
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return self::$instances[$id];
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}
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$object = self::newFromId( $id );
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self::$instances[$id] = $object;
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return $object;
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}
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/**
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* Clear all the cached instances.
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*/
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static function clear() {
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self::$instances = array();
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}
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/**
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* Create a new cache object of the specified type.
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*
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* @param $id
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*
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* @return ObjectCache
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*/
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static function newFromId( $id ) {
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global $wgObjectCaches;
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if ( !isset( $wgObjectCaches[$id] ) ) {
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throw new MWException( "Invalid object cache type \"$id\" requested. " .
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"It is not present in \$wgObjectCaches." );
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}
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return self::newFromParams( $wgObjectCaches[$id] );
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}
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/**
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* Create a new cache object from parameters
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*
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* @param $params array
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*
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* @return ObjectCache
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*/
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static function newFromParams( $params ) {
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if ( isset( $params['factory'] ) ) {
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return call_user_func( $params['factory'], $params );
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} elseif ( isset( $params['class'] ) ) {
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$class = $params['class'];
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return new $class( $params );
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} else {
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throw new MWException( "The definition of cache type \"" . print_r( $params, true ) . "\" lacks both " .
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"factory and class parameters." );
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}
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}
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/**
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* Factory function referenced from DefaultSettings.php for CACHE_ANYTHING
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*/
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static function newAnything( $params ) {
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global $wgMainCacheType, $wgMessageCacheType, $wgParserCacheType;
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$candidates = array( $wgMainCacheType, $wgMessageCacheType, $wgParserCacheType );
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foreach ( $candidates as $candidate ) {
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if ( $candidate !== CACHE_NONE && $candidate !== CACHE_ANYTHING ) {
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return self::getInstance( $candidate );
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}
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}
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return self::getInstance( CACHE_DB );
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}
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/**
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* Factory function referenced from DefaultSettings.php for CACHE_ACCEL.
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*
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* @return ObjectCache
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*/
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static function newAccelerator( $params ) {
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if ( function_exists( 'apc_fetch') ) {
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$id = 'apc';
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} elseif( function_exists( 'xcache_get' ) && wfIniGetBool( 'xcache.var_size' ) ) {
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$id = 'xcache';
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} elseif( function_exists( 'wincache_ucache_get' ) ) {
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$id = 'wincache';
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} else {
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throw new MWException( "CACHE_ACCEL requested but no suitable object " .
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"cache is present. You may want to install APC." );
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}
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return self::newFromId( $id );
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}
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/**
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* Factory function that creates a memcached client object.
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* The idea of this is that it might eventually detect and automatically
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* support the PECL extension, assuming someone can get it to compile.
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*
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* @param $params array
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*
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* @return MemcachedPhpBagOStuff
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*/
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static function newMemcached( $params ) {
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return new MemcachedPhpBagOStuff( $params );
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}
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}
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