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From "Erik Hatcher" <li...@ehatchersolutions.com>
Subject Re: Indexes in WAR files
Date Wed, 13 Feb 2002 00:48:11 GMT
Les,

I look forward to the results of your work on this!

    Erik


----- Original Message -----
From: "Les Hughes" <leslie.hughes@rubus.com>
To: "'Lucene Developers List'" <lucene-dev@jakarta.apache.org>
Sent: Tuesday, February 12, 2002 2:21 PM
Subject: RE: Indexes in WAR files


>
> Hi Erik,
>
> Reading the servlet spec again it says that calls such as
> servletcontext.getRealPath() will *possibly* return null if the content is
> being served from a war as opposed the physical path on disk - I'm
informed
> that weblogic actually returns the name of the warfile and not the
exploded
> location. But you're right, Tomcat works differently.
>
> So in order to isolate from different interpretations of the spec, I'm
going
> to knock up a WARDirectory that probably will wrap a RAMDirectory (going
> back to the servlet container to getResourceAsStream seems awfully
expensive
> to me) as a first go.
> I'll post my efforts in a couple of days.
>
>
> Any comments on my thoughts for using the decorator pattern with
> Directory(s) (below)?
>
>
> Bye,
>
> Les
>
>
>
>
> > -----Original Message-----
> > From: Erik Hatcher [mailto:lists@ehatchersolutions.com]
> > Sent: 12 February 2002 14:50
> > To: Lucene Developers List
> > Subject: Re: Indexes in WAR files (was RE: [SUBMIT] docweb demo app)
> >
> >
> > So you're talking about a servlet container that does not
> > expand the WAR
> > into filesystem files?  Hmmm, I haven't encountered that scenario, but
> > surely sounds like you're right in that it won't work without
> > modifications
> > to Lucene to pull an index from a "resource".
> >
> > I've been embedding indexes into WAR files for quite a while
> > and it works
> > fine with both Resin and Tomcat 4 - but both of those expand
> > the WAR file
> > into a filesystem tree.
> >
> >     Erik
> >
> >
> > ----- Original Message -----
> > From: "Les Hughes" <leslie.hughes@rubus.com>
> > To: "''Lucene Developers List' '" <lucene-dev@jakarta.apache.org>
> > Sent: Tuesday, February 12, 2002 5:30 AM
> > Subject: Indexes in WAR files (was RE: [SUBMIT] docweb demo app)
> >
> >
> > >
> > >
> > >
> > > Thanks Erik.
> > >
> > > Not too sure my question was clear. What I'm trying to do
> > is to create a
> > > searchable reference info system (ie bunch of
> > documentation...:-) that is
> > > packaged into a warfile, dropped into a servlet container
> > and run 'in
> > place'
> > > In other words, I can't have the index on the filesystem
> > but instead, it's
> > > prebuilt and packaged into the WAR file.
> > >
> > > So at the moment, Lucene on seems to be able to access file
> > system indexes
> > > (via the FSDirectory) or RAM based indexes via the
> > RAMDirectory (which I
> > > understand has a few problems with arrayindexoutofbounds
> > exceptions...)
> > >
> > > What I was thinking about doing was twofold.
> > >
> > > 1) Modify the Directory classes so that they follow more of
> > a decorator
> > > pattern (as in Directory dir = new RAMDirectory(new XXXDirectory(new
> > > FSDirectory()) instead of the manual initialisation code
> > that I've found
> > on
> > > the list
> > >
> > (http://www.mail-archive.com/lucene-user@jakarta.apache.org/ms
> > g00196.html)
> > > and
> > >
> > > 2) Create a WARDirectory for *readonly* access to a
> > pre-built index stored
> > > in a WAR.
> > >
> > >
> > > So, am I barking up the wrong tree?
> > >
> > >
> > > Bye,
> > >
> > > Les
> > >
> > >
> > >
> > > -----Original Message-----
> > > From: Erik Hatcher
> > > To: 'Lucene Developers List'
> > > Sent: 2/11/02 10:36 PM
> > > Subject: Re: [SUBMIT] docweb demo app
> > >
> > > ----- Original Message -----
> > > From: "Les Hughes" <leslie.hughes@rubus.com>
> > >
> > > > 1) Thanks for the Ant task - that'll save me some time on
> > the train
> > > tomorrow
> > > > ;-)
> > >
> > > You're welcome!
> > >
> > > > 2) Maybe I need to RTFM but does the index run straight
> > out of the WAR
> > > file?
> > > > I was thinking about creating a WARDirectory to do this
> > but if it's
> > > possible
> > > > some other way I'd be interested to hear.
> > >
> > > The index is built when someone runs it manually from Lucene's CVS
> > > directory
> > > locally currently.  The idea is that it will be incorporated into
> > > distribution builds (perhaps as a separate download since
> > its about a
> > > 2MB
> > > WAR) in the future.  What I patched doesn't make it automatically
> > > happen...
> > > that comes after there is lucene-dev signoff and it gets
> > rolled into the
> > > main distribution build dependency graph.
> > >
> > >     Erik
> > >
> > >
> > >
> > > --
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