ContactsService.java

	public String rebuildIndex() throws InterruptedException {
		FullTextEntityManager fullTextEntityManager = Search
				.getFullTextEntityManager(entityManager);
		Future<?> future = fullTextEntityManager.createIndexer()
				.batchSizeToLoadObjects(30).threadsForSubsequentFetching(8)
				.threadsToLoadObjects(4).cacheMode(CacheMode.NORMAL).start();
		return future.isDone() ? "Index rebuilt successfully"
				: "Index recreation in progress";
	}