lucene: reopen indexreader after index

Question

when my search server start to run, it will load all of the index at once for all queries. However, it's still use the old index even if I rebuild the index. So I think the I should tell the indexReader of searcher to reopen index after the server rebuild the index, but how to implement it? Maybe use producer-consumer pattern? Although I can use indexReader.isCurrent() to check whether the index have changed, but I have to check this ever times to search or at some period. Is there any more efficient and real-time way?

Answer 1

A convenient way to do what you are describing is to use Lucene's helper class SearcherManager. If you are interested in doing near-realtime search, you might also be interested in NRTManager.

There is a very nice blog article about these two classes on Mike McCandless' blog.