If the reopen suggestion doesn't fix it, I suggest that you cut down your singleton class to the absolute minimum, wrap it in a junit test case that demonstrates the problem and post the code here.
-- Ian. On Mon, Dec 15, 2008 at 10:06 PM, Zender00 <danielpenn...@gmx.net> wrote: > > Hi Paul, > thanks for your reply. > > I compared your source code and it seems that you are using the same > mechanism for the singleton like me... I am using lucene 2.4 and get the > exception above explained. > I am wondering why because I only create an instance of my lucene object > (which itself constructs an IndexReader/IndexWriter in its constructor) and > return this instance to objects which want to execute some lucene > operations. So I only applied the singleton-pattern. > I am still wondering why these pattern results in my exception. Why could it > happen, that these Streams (IndexWriter/IndexReader) close itself. In my > opinion it is completely legal to do so. > > Any other suggestions? > > > > polx wrote: >> >> >> Le 15-déc.-08 à 13:09, Zender00 a écrit : >>> in my opinion it is possible to use a reader and writer >>> simultanesously on >>> the same index. In my already working lucene class, I use they are >>> both open >>> all the time. >> >> mmmh... >> >>> But this isnt the reason for my exception. It seems that lucene cannot >>> handle my singleton. How did you implement your singleton with >>> lucene? Which >>> lucene version? >> >> 2.3.1, source code APL and GPL at: >> http://svn.activemath.org/intergeo/Platform/SearchI2G/index/ >> >> in another project, this was used with Lucene 2.0. >> >> paul >> >>> polx wrote: >>>> >>>> We use singletons all the time, >>>> >>>> Just be careful that are writer and a reader cannot be opened >>>> simultaneously on the same index. Either you write or your read (and >>>> delete). >>>> >>>> paul >>>> >>>> >>>> Le 15-déc.-08 à 12:06, Zender00 a écrit : >>>> >>>>> >>>>> I extend my original post: >>>>> How is it possible to use lucene in 2 diffent classes / objects, if >>>>> I dont >>>>> want to use static methods/variables? >>>>> (one object read/writer, the other is read only) >>>>> >>>>> Kind regards, >>>>> D. Penning >>>>> >>>>> Zender00 wrote: >>>>>> >>>>>> Hi, >>>>>> I tried to implement a singleton pattern for my already working >>>>>> lucene >>>>>> object. >>>>>> But there is a strange error when I tried to access the instance. >>>>>> >>>>>> When my Singleton GetInstance() method is executed for the first >>>>>> time it >>>>>> creates a new instance of my lucene object. There are some member >>>>>> variables in this object like an IndexWriter and IndexReader. These >>>>>> objects are created in the constructor and I can access them >>>>>> directly in >>>>>> the constructor successfully. >>>>>> GetInstance() now returns this lucene object and I have to execute >>>>>> some >>>>>> operations on it. But the IndexWriter seems to be closed meanwhile >>>>>> and I >>>>>> got the exception: >>>>>> >>>>>> "org.apache.lucene.store.AlreadyClosed Exception: this >>>>>> IndexWriter is >>>>>> closed" when my object tries to writer some documents. >>>>>> >>>>>> How could this happen? Isn't it possible to use lucene with a >>>>>> singleton-pattern? >>>>>> >>>>>> Kind regards, >>>>>> D. Penning >>>>>> >>>>> >>>>> -- >>>>> View this message in context: >>>>> http://www.nabble.com/Singleton-and-Lucene%3A-org.apache.lucene.store.AlreadyClosed-tp20983056p21011945.html >>>>> Sent from the Lucene - Java Users mailing list archive at >>>>> Nabble.com. >>>>> >>>>> >>>>> --------------------------------------------------------------------- >>>>> To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org >>>>> For additional commands, e-mail: java-user-h...@lucene.apache.org >>>>> >>>> >>>> >>>> >>>> >>> >>> -- >>> View this message in context: >>> http://www.nabble.com/Singleton-and-Lucene%3A-org.apache.lucene.store.AlreadyClosed-tp20983056p21012798.html >>> Sent from the Lucene - Java Users mailing list archive at Nabble.com. >>> >>> >>> --------------------------------------------------------------------- >>> To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org >>> For additional commands, e-mail: java-user-h...@lucene.apache.org >>> >> >> >> >> > > -- > View this message in context: > http://www.nabble.com/Singleton-and-Lucene%3A-org.apache.lucene.store.AlreadyClosed-tp20983056p21022920.html > Sent from the Lucene - Java Users mailing list archive at Nabble.com. > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > > --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
