}
/**
- * Create a new BacklinkCache or reuse any existing one
+ * Create a new BacklinkCache or reuse any existing one.
+ * Currently, only one cache instance can exist; callers that
+ * need multiple backlink cache objects should keep them in scope.
*
* @param Title $title : Title object to get a backlink cache for
* @return BacklinkCache
*/
public static function get( Title $title ) {
if ( !self::$cache ) { // init cache
- self::$cache = new ProcessCacheLRU( 2 );
+ self::$cache = new ProcessCacheLRU( 1 );
}
$dbKey = $title->getPrefixedDBkey();
if ( !self::$cache->has( $dbKey, 'obj' ) ) {
/**
* Get the field name prefix for a given table
* @param $table String
+ * @throws MWException
* @return null|string
*/
protected function getPrefix( $table ) {
* Get the SQL condition array for selecting backlinks, with a join
* on the page table.
* @param $table String
+ * @throws MWException
* @return array|null
*/
protected function getConditions( $table ) {
default:
$conds = null;
wfRunHooks( 'BacklinkCacheGetConditions', array( $table, $this->title, &$conds ) );
- if( !$conds )
+ if( !$conds ) {
throw new MWException( "Invalid table \"$table\" in " . __CLASS__ );
+ }
}
return $conds;
* Partition a DB result with backlinks in it into batches
* @param $res ResultWrapper database result
* @param $batchSize integer
+ * @throws MWException
* @return array @see
*/
protected function partitionResult( $res, $batchSize ) {