mediawiki-extensions-Echo/includes/cache/RevisionLocalCache.php

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<?php
/**
* Cache class that maps revision id to Revision object
*/
class EchoRevisionLocalCache extends EchoLocalCache {
/**
* @var EchoRevisionLocalCache
*/
private static $instance;
/**
* The current wiki id
* @var string|null
*/
private static $wiki;
/**
* Create a EchoRevisionLocalCache object
* @return EchoRevisionLocalCache
*/
public static function create() {
// A job queue may run against multiple wikis,
// initialize a new one for the current wiki
if ( wfWikiId() != self::$wiki ) {
self::$instance = null;
self::$wiki = wfWikiId();
}
if ( !self::$instance ) {
self::$instance = new EchoRevisionLocalCache();
}
return self::$instance;
}
/**
* {@inheritDoc}
*/
protected function resolve() {
if ( $this->lookups ) {
// @Todo Add newFromIds() to Revision
$dbr = wfGetDB( DB_SLAVE );
$fields = array_merge(
Revision::selectFields(),
Revision::selectPageFields(),
Revision::selectUserFields()
);
$res = $dbr->select(
array( 'revision', 'page', 'user' ),
$fields,
array( 'rev_id' => $this->lookups ),
__METHOD__,
array(),
array(
'page' => Revision::pageJoinCond(),
'user' => Revision::userJoinCond()
)
);
if ( $res ) {
foreach ( $res as $row ) {
$this->targets->set( $row->rev_id, new Revision( $row ) );
}
$this->lookups = array();
}
}
}
}