That is correct, as long as you incRef the reader before starting each
query, and decRef the reader after finishing each query.
If you call close() during this time, the reader is not actually
closed until decRef is called for all previous incRefs.
Be certain that once you close() a reader there is no way a new query
can grab that reader. That would be a thread hazard that could result
in using an already closed reader.
Also be certain you always decRef, eg in a finally clause.
Mike
Khawaja Shams wrote:
Hello, Thank you for your ideas. While these look promising, it
seems like
there are many places within Lucene's codebase that are invoking the
incRef
and decRef methods. Upon a shallow analysis of the code, it seems
like I
can call close, and the doClose method does not get called until
refCount is
0. Can anyone correct or confirm my assumption that you can call
close and
any query in progress as you call close will succeed because the
reader
won't be closed until the refCount is 0. Thanks again!
On Wed, Oct 15, 2008 at 3:10 AM, Michael McCandless <
[EMAIL PROTECTED]> wrote:
As of 2.4.0 they are public.
Mike
Ganesh wrote:
incRef/decRef methods are protected. Is there any other way to use
these
methods without extending it?
Regards
Ganesh
----- Original Message ----- From: "Michael McCandless" <
[EMAIL PROTECTED]>
To: <java-user@lucene.apache.org>
Sent: Wednesday, October 15, 2008 2:31 PM
Subject: Re: Closing Index Reader
Ganesh wrote:
Yes. Once the Indexreader is closed, you should not do make any
calls
with that object.
Extend the IndexReader to add support for reference count. Close
the
reader once the count is zero.
Actually you can just use the [expert] incRef/decRef methods on
IndexReader to track in-flight searches still using it. You
shouldn't have
to extend it.
Mike
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