That is correct.
On Dec 13, 2006, at 4:48 PM, Otis Gospodnetic wrote:
Aaaah, I think I get it.
TermIndexReader can be shared by multiple threads.
Each thread will need access to SegmentTermEnum inside the TIR, but
since each of them will search, scan, and seek to a different
location, each threads needs its own copy/clone of the original
SegmentTermEnum.
ThreadLocal is then used as a simple cache for the clone of the
original SegmentTermEnum, so a single thread can get to it without
repeating scan/seek stuff, and so that each thread works with its
own clone of SegmentTermEnum.
Otis
----- Original Message ----
From: Otis Gospodnetic <[EMAIL PROTECTED]>
To: [email protected]
Sent: Wednesday, December 13, 2006 4:53:45 PM
Subject: TermInfosReader and clone of SegmentTermEnum
Hi,
I'm looking at Robert Engels' patches in http://issues.apache.org/
jira/browse/LUCENE-436 and looking at TermInfosReader.
I think I understand why there is ThreadLocal there in the first
place - to act as a per-thread cache for the expensive to compute
SegmentTermEnum.... yes?
But why is there is need to clone() the (original) SegmentTermEnum?
Thanks,
Otis
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