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<?php
/**
* @file
* @ingroup Cache
*/
/**
* FakeMemCachedClient imitates the API of memcached-client v. 0.1.2.
* It acts as a memcached server with no RAM, that is, all objects are
* cleared the moment they are set. All set operations succeed and all
* get operations return null.
* @ingroup Cache
*/
class FakeMemCachedClient {
function add ($key, $val, $exp = 0) { return true; }
function decr ($key, $amt=1) { return null; }
function delete ($key, $time = 0) { return false; }
function disconnect_all () { }
function enable_compress ($enable) { }
function forget_dead_hosts () { }
function get ($key) { return null; }
function get_multi ($keys) { return array_pad(array(), count($keys), null); }
function incr ($key, $amt=1) { return null; }
function replace ($key, $value, $exp=0) { return false; }
function run_command ($sock, $cmd) { return null; }
function set ($key, $value, $exp=0){ return true; }
function set_compress_threshold ($thresh){ }
function set_debug ($dbg) { }
function set_servers ($list) { }
}
global $wgCaches;
$wgCaches = array();
/**
* Get a cache object.
* @param int $inputType cache type, one the the CACHE_* constants.
*/
function &wfGetCache( $inputType ) {
global $wgCaches, $wgMemCachedServers, $wgMemCachedDebug, $wgMemCachedPersistent;
$cache = false;
if ( $inputType == CACHE_ANYTHING ) {
reset( $wgCaches );
$type = key( $wgCaches );
if ( $type === false || $type === CACHE_NONE ) {
$type = CACHE_DB;
}
} else {
$type = $inputType;
}
if ( $type == CACHE_MEMCACHED ) {
if ( !array_key_exists( CACHE_MEMCACHED, $wgCaches ) ) {
if ( !class_exists( 'MemcachedClientforWiki' ) ) {
class MemCachedClientforWiki extends memcached {
function _debugprint( $text ) {
wfDebug( "memcached: $text" );
}
}
}
$wgCaches[CACHE_MEMCACHED] = new MemCachedClientforWiki(
array('persistant' => $wgMemCachedPersistent, 'compress_threshold' => 1500 ) );
$wgCaches[CACHE_MEMCACHED]->set_servers( $wgMemCachedServers );
$wgCaches[CACHE_MEMCACHED]->set_debug( $wgMemCachedDebug );
}
$cache =& $wgCaches[CACHE_MEMCACHED];
} elseif ( $type == CACHE_ACCEL ) {
if ( !array_key_exists( CACHE_ACCEL, $wgCaches ) ) {
if ( function_exists( 'eaccelerator_get' ) ) {
$wgCaches[CACHE_ACCEL] = new eAccelBagOStuff;
} elseif ( function_exists( 'apc_fetch') ) {
$wgCaches[CACHE_ACCEL] = new APCBagOStuff;
} elseif( function_exists( 'xcache_get' ) ) {
$wgCaches[CACHE_ACCEL] = new XCacheBagOStuff();
} elseif ( function_exists( 'mmcache_get' ) ) {
$wgCaches[CACHE_ACCEL] = new TurckBagOStuff;
} else {
$wgCaches[CACHE_ACCEL] = false;
}
}
if ( $wgCaches[CACHE_ACCEL] !== false ) {
$cache =& $wgCaches[CACHE_ACCEL];
}
} elseif ( $type == CACHE_DBA ) {
if ( !array_key_exists( CACHE_DBA, $wgCaches ) ) {
$wgCaches[CACHE_DBA] = new DBABagOStuff;
}
$cache =& $wgCaches[CACHE_DBA];
}
if ( $type == CACHE_DB || ( $inputType == CACHE_ANYTHING && $cache === false ) ) {
if ( !array_key_exists( CACHE_DB, $wgCaches ) ) {
$wgCaches[CACHE_DB] = new MediaWikiBagOStuff('objectcache');
}
$cache =& $wgCaches[CACHE_DB];
}
if ( $cache === false ) {
if ( !array_key_exists( CACHE_NONE, $wgCaches ) ) {
$wgCaches[CACHE_NONE] = new FakeMemCachedClient;
}
$cache =& $wgCaches[CACHE_NONE];
}
return $cache;
}
/** Get the main cache object */
function &wfGetMainCache() {
global $wgMainCacheType;
$ret =& wfGetCache( $wgMainCacheType );
return $ret;
}
/** Get the cache object used by the message cache */
function &wfGetMessageCacheStorage() {
global $wgMessageCacheType;
$ret =& wfGetCache( $wgMessageCacheType );
return $ret;
}
/** Get the cache object used by the parser cache */
function &wfGetParserCacheStorage() {
global $wgParserCacheType;
$ret =& wfGetCache( $wgParserCacheType );
return $ret;
}
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