Yes, I replied 4 days ago, is your SPAM filter interfering? On Tue, Mar 10, 2009 at 8:35 AM, Ganesh <emailg...@yahoo.co.in> wrote:
> Any reply on this? > > ----- Original Message ----- From: "Ganesh" <emailg...@yahoo.co.in> > To: <java-user@lucene.apache.org> > Sent: Monday, March 09, 2009 11:28 AM > Subject: Re: Questions about analyzer > > > Mike in of his replies to the thread "Faceted search using Lucene", gave >> the following code review comment >> >> * You are creating a new Analyzer & QueryParser every time, also >> creating unnecessary garbage; instead, they should be created once >> & reused. >> >> This made me to ask the below questions. >> Is QueryParser and Analyzer thread safe? >> > > >> Based on the application default langauge, i need to pick analyzer. Few >> analyzers (Russian, French) are available in both Contrib and Snowball. >> Which is more reliable? >> >> Reagrds >> Ganesh >> >> >> ----- Original Message ----- From: "Erick Erickson" < >> erickerick...@gmail.com> >> To: <java-user@lucene.apache.org> >> Sent: Friday, March 06, 2009 6:47 PM >> Subject: Re: Questions about analyzer >> >> >> See below >>> On Fri, Mar 6, 2009 at 1:44 AM, Ganesh <emailg...@yahoo.co.in> wrote: >>> >>> Hello all >>>> >>>> 1) >>>> Which is best to use Snowball analyzer or Lucene contrib analyzer? There >>>> is >>>> no inbuilt stop word list for Snowball analyzer? >>>> >>>> >>> What is the "Lucene contrib analyzer"? There are 12 of them...... >>> And regardless, the answer is "It depends" on what >>> you're trying to accomplish, which you haven't stated. >>> >>> I don't know if there's a default set of stop words, but this >>> seems like a pretty easy thing to test for yourself. >>> >>> >>> >>>> 2) >>>> Whether Analyzer and QueryParser are thread-free. They could created >>>> once >>>> and use it in as many threads? >>>> >>>> From the FAQ ( >>> >>> http://wiki.apache.org/lucene-java/LuceneFAQ#head-42833b3bb259e10c64424a892a3f04840a187d80 >>> ) >>> >>> Is the QueryParser thread-safe? >>> >>> No, it's not. >>> >>> >>> I'm unsure about analyzers, but they are so lightweight I wouldn't >>> >>> go to the trouble of sharing them among threads just to be safe. >>> >>> >>> >>> >>>> 3) >>>> I am using Snowball Analyzer to do index and search., When i search for >>>> windows AND vista, QueryParser is adding AND as part of search, But i am >>>> expecting something like +windows +vista. >>>> >>>> >>> How do you know this? Is the the result of query.toString? And is >>> the "AND" *in your query* uppercase? One of the quirks of Lucene >>> is that it requires 'and', 'or' and 'not' to be uppercase to be >>> interpreted as you expect. >>> >>> Best >>> Erick >>> >>> >>> >>>> Regards >>>> Ganesh >>>> Send instant messages to your online friends >>>> http://in.messenger.yahoo.com >>>> --------------------------------------------------------------------- >>>> To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org >>>> For additional commands, e-mail: java-user-h...@lucene.apache.org >>>> >>>> >>>> >>> >> Send instant messages to your online friends >> http://in.messenger.yahoo.com >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org >> For additional commands, e-mail: java-user-h...@lucene.apache.org >> >> > Send instant messages to your online friends http://in.messenger.yahoo.com > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > >
