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From Erik Hatcher <>
Subject Re: IndexSearcher on JAR resources?
Date Thu, 12 Sep 2002 09:23:57 GMT
Tim Dawson wrote:
> I need to do almost exactly the same thing as Erik - create a read-only
> index on our "help" webapp that will be packaged inside an ear file.

Eventually I'll have a look at implementing this (and of course 
contributing it back to Lucene's codebase) - its on my to-do list.  But 
if you want to beat me to it, even better!  It could be a few months 
before I actually get to it, since the filesystem works fine for my 
demonstration environment.

> I'll probably end up creating an ant task to do the actual indexing.

Save yourself a bit of leg-work - and reuse what I've already done.  Its 
in the Lucene sandbox CVS area already.  It could use a little work, but 
it does work nicely for what I've pushed through it to index text and 
HTML files.  It also has quite speedy dependency checking, so if you 
index the same files a second time, its much much faster as it just 
compares dates and ignores them.  If you aren't indexing filesystem 
files then this won't work out of the box for you, but might serve as a 
starting point.

> Has anybody packaged indexes into a jar before? Why is the API so
> restrictive as to require an open filesystem?

I suspect that leveraging the read-only FSDirectory would work, although 
I have not looked at the code to see how tough or easy that might be.


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