protected final static function initHooks()
    {
        if ( isset( $init ) )
            return;

        static $init = true;

        $ini = eZINI::instance( 'content.ini' );

        self::attachHooks( 'preQueue', $ini->variable( 'PublishingSettings', 'AsynchronousPublishingPreQueueHooks' ) );
        self::attachHooks( 'postHandling', $ini->variable( 'PublishingSettings', 'AsynchronousPublishingPostHandlingHooks' ) );
    }