I'm also quite unhappy with FSDirectory and locking issues... Worst thing is that it creates locks on file system, and those files are not temporary. If JVM crashes for whatever reason - they are still there ( this is extremely inconveninet while debugging... )
Another reasin is that it's in no way friendly for IoC environment. It can not be created via constructor. Why? I had to write wrapper which delegates to FSDirectory, but this is not an elegant solution... It's not as unfriendly as hibernate ( for IoC via pico ) , but still unfriendly... > Therefore we dug in a bit more...... > > Long answer - theres a heap of horrible, horrible > code in the FSDirectory that tries to be clever and > I think its not quite working correctly. > > Two types of lock - write.lock and commit.lock. The > write.lock is used exclusively for synchronising the > indexing of documents and has *no* impact on > searching whatsoever. > > Commit.lock is another little story. Commit.lock is > used for two things - stopping indexing processes > from overwriting segments that another one is > currently using, and stopping IndexReaders from > overwriting each other when they delete entries > (dcon't even start asking my why a bloody > IndexReader can delete documents). > > *However*, theres another naughty little usage that > isn't listed in any of the documentation, and here > it is.... > > Doug Cutting wrote FSDirectory in such a way that it > caches a directory. Hence, if FSDirectory is called > more than once with the same directory, the > FSDirectory class uses a static Hashtable to return > the current values. However, if FSDirectory is > called with a *different* directory, it engages a > commit.lock while it updates the values. It *also* > makes that Hashtable (sychronised). ===== ----[ Konstantin Pribluda ( ko5tik ) ]---------------- Zu Verstärkung meines Teams suche ich ab Sofort einen Softwareentwickler[In] für die Festanstellung. Arbeitsort: Mainz Skills: Programmieren, Kenntnisse in OpenSource-Bereich ----[ http://www.pribluda.de ]------------------------ __________________________________ Do you Yahoo!? New and Improved Yahoo! Mail - 100MB free storage! http://promotions.yahoo.com/new_mail --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
