They'll be in synch forever unless and until you *change* the index. Once you do anything with an IndexWriter, you have to be very careful about relying on doc IDs.
But remember that opening a searcher takes a snapshot of the index and that reader/searcher will NOT see changes. So you could think about building your cache and using it *as long as you haven't closed/reopened your index reader*. The cache and search will be in synch for that interval. Best Erick On Fri, Apr 18, 2008 at 9:14 AM, Shailendra Mudgal < [EMAIL PROTECTED]> wrote: > Hi Erik Thanks for you prompt reply. > > So if i refresh the searcher in every one hour and that time itself if i > refresh this cache also, is this going to work? I mean will the document > ids > will be in sync for that one hour. > > > On Fri, Apr 18, 2008 at 2:02 AM, Erick Erickson <[EMAIL PROTECTED]> > wrote: > > > Doc IDs are NOT permanent. If you don't change your index at all > > (delete especially, but sometimes adding/optimizing can chage IDs) > > then you can re-use them. Otherwise not. > > > > > > On Thu, Apr 17, 2008 at 1:45 PM, Shailendra Mudgal < > > [EMAIL PROTECTED]> wrote: > > > > > Hi All, > > > > > > I have a small confusion regarding the document ids which we collect > > using > > > HitCollector.collect() method. Here is the description of the > confusion > > : > > > > > > First i created a FieldCache of type <docID, <list of companyIDs>> > using > > a > > > query which collects all the articles which are only a month old. I am > > > storing them into a map. > > > > > > So now my cache has same document id 's associated with their field > > value > > > ready in the memory. > > > > > > Now suppose for a search which has duration less then a month, i get a > > > list > > > of docIds using hit collector. Can i map these document ids to the > map, > > > which i created earlier. And use those field values??? > > > > > > > > > Any help will be appreciated .... > > > > > > Regards, > > > Shailendra > > > > > >
