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Posted to java-user@lucene.apache.org by "m.harig" <m....@gmail.com> on 2009/10/02 18:52:30 UTC
index reader for multiple indexes
hello all ,
am merging more than one indexes to search a document , how do i use
IndexReader here to open multiple indexes? (since IndexReader will open one
directory at a time) could any1 please suggest me?
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Re: index reader for multiple indexes
Posted by David Causse <dc...@spotter.com>.
On Fri, Oct 02, 2009 at 11:40:09PM -0700, m.harig wrote:
>
> Thanks Uwe Schindler ,
>
> If i use an IndexReader[] to use MultiReader , will it be thread
> safe? because i've to reopen my IndexReader to check whether my index is
> updated or not . In this case how do i handle it? please suggest me
Hi,
AFAIK readers are cloned when they are used inside MultiReader, so I
guess reopening a single reader outside MultiReader has no effect and
reopen on MultiReader reopen all the readers.
So I think there is no way to reopen one specific reader inside a
MultiReader without a new instance of the MultiReader.
IMHO the easy way is to use MultiReader as a normal reader (with
default constructor MultiReader(IndexReader... readers) ), forget the
original readers and use reopen on the MultiReader. It should be
thread-safe.
You should check the sources for more complicated usage.
>
>
>
> Uwe Schindler wrote:
> >
> > Use MultiReader which is an IndexReader on top of various
> > Sub-IndexReaders.
> >
> > -----
> > Uwe Schindler
> > H.-H.-Meier-Allee 63, D-28213 Bremen
> > http://www.thetaphi.de
> > eMail: uwe@thetaphi.de
> >
> >> -----Original Message-----
> >> From: m.harig [mailto:m.harig@gmail.com]
> >> Sent: Friday, October 02, 2009 6:52 PM
> >> To: java-user@lucene.apache.org
> >> Subject: index reader for multiple indexes
> >>
> >>
> >> hello all ,
> >>
> >> am merging more than one indexes to search a document , how do i
> >> use
> >> IndexReader here to open multiple indexes? (since IndexReader will open
> >> one
> >> directory at a time) could any1 please suggest me?
> >>
> >>
> >> --
> >> View this message in context: http://www.nabble.com/index-reader-for-
> >> multiple-indexes-tp25716741p25716741.html
> >> Sent from the Lucene - Java Users mailing list archive at Nabble.com.
> >>
> >>
> >> ---------------------------------------------------------------------
> >> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
> >> For additional commands, e-mail: java-user-help@lucene.apache.org
> >
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
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> >
> >
> >
>
> --
> View this message in context: http://www.nabble.com/index-reader-for-multiple-indexes-tp25716741p25726159.html
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>
>
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--
David Causse
Spotter
http://www.spotter.com/
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RE: index reader for multiple indexes
Posted by "m.harig" <m....@gmail.com>.
Thanks Uwe Schindler ,
If i use an IndexReader[] to use MultiReader , will it be thread
safe? because i've to reopen my IndexReader to check whether my index is
updated or not . In this case how do i handle it? please suggest me
Uwe Schindler wrote:
>
> Use MultiReader which is an IndexReader on top of various
> Sub-IndexReaders.
>
> -----
> Uwe Schindler
> H.-H.-Meier-Allee 63, D-28213 Bremen
> http://www.thetaphi.de
> eMail: uwe@thetaphi.de
>
>> -----Original Message-----
>> From: m.harig [mailto:m.harig@gmail.com]
>> Sent: Friday, October 02, 2009 6:52 PM
>> To: java-user@lucene.apache.org
>> Subject: index reader for multiple indexes
>>
>>
>> hello all ,
>>
>> am merging more than one indexes to search a document , how do i
>> use
>> IndexReader here to open multiple indexes? (since IndexReader will open
>> one
>> directory at a time) could any1 please suggest me?
>>
>>
>> --
>> View this message in context: http://www.nabble.com/index-reader-for-
>> multiple-indexes-tp25716741p25716741.html
>> Sent from the Lucene - Java Users mailing list archive at Nabble.com.
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
>> For additional commands, e-mail: java-user-help@lucene.apache.org
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
> For additional commands, e-mail: java-user-help@lucene.apache.org
>
>
>
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RE: index reader for multiple indexes
Posted by Uwe Schindler <uw...@thetaphi.de>.
Use MultiReader which is an IndexReader on top of various Sub-IndexReaders.
-----
Uwe Schindler
H.-H.-Meier-Allee 63, D-28213 Bremen
http://www.thetaphi.de
eMail: uwe@thetaphi.de
> -----Original Message-----
> From: m.harig [mailto:m.harig@gmail.com]
> Sent: Friday, October 02, 2009 6:52 PM
> To: java-user@lucene.apache.org
> Subject: index reader for multiple indexes
>
>
> hello all ,
>
> am merging more than one indexes to search a document , how do i
> use
> IndexReader here to open multiple indexes? (since IndexReader will open
> one
> directory at a time) could any1 please suggest me?
>
>
> --
> View this message in context: http://www.nabble.com/index-reader-for-
> multiple-indexes-tp25716741p25716741.html
> Sent from the Lucene - Java Users mailing list archive at Nabble.com.
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
> For additional commands, e-mail: java-user-help@lucene.apache.org
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