Jon
I ended up adapting your approach. The solution involves keeping a LRU
cache of page boundary scoredocs and their respective positions. New
positions are added to the cache as new pages are discovered. To cut
down on searches, when scrolling backwards and forwards, the search
begins from nearest cached position.
Cheers
Jamie
On 2014/06/03, 3:24 PM, Jon Stewart wrote:
With regards to pagination, is there a way for you to cache the
IndexSearcher, Query, and TopDocs between user pagination requests (a
lot of webapp frameworks have object caching mechanisms)? If so, you
may have luck with code like this:
void ensureTopDocs(final int rank) throws IOException {
if (StartDocIndex > rank) {
Docs = Searcher.search(SearchQuery, TOP_DOCS_WINDOW);
StartDocIndex = 0;
}
int len = Docs.scoreDocs.length;
while (StartDocIndex + len <= rank) {
StartDocIndex += len;
Docs = Searcher.searchAfter(Docs.scoreDocs[len - 1],
SearchQuery, TOP_DOCS_WINDOW);
len = Docs.scoreDocs.length;
}
}
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