silverstripe-fulltextsearch/code/search/processors/SearchUpdateMessageQueueProcessor.php

<?php

class SearchUpdateMessageQueueProcessor extends SearchUpdateProcessor {
	/**
	 * The MessageQueue to use when processing updates
	 * @config
	 * @var string
	 */
	private static $reindex_queue = "search_indexing";

	public function triggerProcessing() {
		MessageQueue::send(
			Config::inst()->get('SearchMessageQueueUpdater', 'reindex_queue'),
			new MethodInvocationMessage($this, "process")
		);
	}
}