Did you have a practical example of the use of SearchManager (initialize, use to do research)?
Thanks in advance. 2013/9/5 Stephen Green <[email protected]> > You can implement a ServletListener for your app and open the index there > (in the contextInitialized method). You can then create the SearcherManager > from the IndexReader/Searcher and store it in the ServletContext, where it > can be fetched out by your REST servlets. > > This is a typical pattern that we use for lots of Web apps that use > resources like Lucene. > > > On Thu, Sep 5, 2013 at 12:05 PM, Ian Lea <[email protected]> wrote: > > > I use a singleton class but there are other ways in tomcat. Can't > > remember what - maybe application scope. > > > > > > -- > > Ian. > > > > > > On Thu, Sep 5, 2013 at 4:46 PM, David Miranda <[email protected] > > > > wrote: > > > Where I can initialize the SearchManager variable to after use it in > the > > > REST servlet to do research in the index? > > > > > > > > > 2013/9/5 Ian Lea <[email protected]> > > > > > >> I think that blog post was bleeding edge and the API changed a bit > > >> subsequently. > > >> > > >> I use > > >> > > >> Directory dir = whatever; > > >> SearcherManager sm = new SearcherManager(dir, new SearcherFactory()); > > >> > > >> to get default behaviour. The javadocs for SearcherFactory explain > > >> that you can write your own implementation if you want custom > > >> behaviour such as warming. > > >> > > >> > > >> -- > > >> Ian. > > >> > > >> > > >> On Thu, Sep 5, 2013 at 3:53 PM, David Miranda < > > [email protected]> > > >> wrote: > > >> > Hi, > > >> > > > >> > I'm trying to implement my code with SearchManager to make my app > > >> > thread-safe. I'm follow this post: > > >> > > > >> > > > http://blog.mikemccandless.com/2011/09/lucenes-searchermanager-simplifies.html > > >> > > > >> > There is a class that implements "SearchWarmer". I can't find this > > class > > >> in > > >> > the Lucene library, what class is that? > > >> > > > >> > Thanks. > > >> > > > >> > > > >> > 2013/9/5 Aditya <[email protected]> > > >> > > > >> >> Hi > > >> >> > > >> >> You want to use REST service for your search, then my advice would > > be to > > >> >> use Solr. As it has buitl-in functionality of REST API. > > >> >> > > >> >> If you want to use Lucene then below are my comments: > > >> >> 1. In do search function, you are creating reader object. If this > > call > > >> is > > >> >> invoked for every query then it would be very expensive. You need > to > > >> create > > >> >> it once globally and re opon it, if the index is modified. Its > better > > >> use > > >> >> SearchManager. > > >> >> > > >> >> Regards > > >> >> Aditya > > >> >> www.findbestopensource.com - Search from 1 Million open source > > >> projects. > > >> >> > > >> >> > > >> >> > > >> >> On Thu, Sep 5, 2013 at 6:46 AM, David Miranda < > > >> [email protected] > > >> >> >wrote: > > >> >> > > >> >> > Hi, > > >> >> > > > >> >> > I'm developing a web application, that contains a REST service in > > the > > >> >> > Tomcat, that receives several requests per second. > > >> >> > The REST requests do research in a Lucene index, to do this i use > > the > > >> >> > IndexSearch. > > >> >> > > > >> >> > My questions are: > > >> >> > - There are concurrency problems in multiple research? > > >> >> > - What the best design pattern to do this? > > >> >> > > > >> >> > public class IndexResearch(){ > > >> >> > > private static int MAX_HITS = 500; > > >> >> > > private static String DIRECTORY = "indexdir"; > > >> >> > > private IndexSearcher searcher; > > >> >> > > private StandardAnalyzer analyzer; > > >> >> > > > > >> >> > > > >> >> > > > >> >> > > > >> >> > > public IndexResearch(){ > > >> >> > > } > > >> >> > > public String doSearch(String text){ > > >> >> > > analyzer = new StandardAnalyzer(Version.LUCENE_43); > > >> >> > > topic = QueryParser.escape(topic); > > >> >> > > Query q = new QueryParser(Version.LUCENE_43, "field", > > analyzer > > >> >> > > ).parse(text); > > >> >> > > File indexDirectory = new File(DIRECTORY); > > >> >> > > IndexReader reader; > > >> >> > > reader = > > >> DirectoryReader.open(FSDirectory.open(indexDirectory)); > > >> >> > > searcher = new IndexSearcher(reader); > > >> >> > > > > >> >> > /*more code*/ > > >> >> > > > >> >> > > } > > >> >> > > } > > >> >> > > > >> >> > > > >> >> > Can I create, in the servlet, one object of this class per client > > >> request > > >> >> > (Is that the best design pattern)? > > >> >> > > > >> >> > Thanks in advance. > > >> >> > > > >> >> > > >> > > > >> > > > >> > > > >> > -- > > >> > Cumprimentos, > > >> > David Miranda > > >> > > >> --------------------------------------------------------------------- > > >> To unsubscribe, e-mail: [email protected] > > >> For additional commands, e-mail: [email protected] > > >> > > >> > > > > > > > > > -- > > > Cumprimentos, > > > David Miranda > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [email protected] > > For additional commands, e-mail: [email protected] > > > > > > > -- > Stephen Green > http://thesearchguy.wordpress.com > -- Cumprimentos, David Miranda
