On Fri, Feb 18, 2005 at 04:45:50PM -0500, Mike Rose wrote: > I can comment on this since I'm in the middle of excising Oracle text > searching and replacing it with Lucene in one of my projects.
Intereseting, particularly as it's from somebody who's already tried an existing in-db fulltext search feature. > All in all, I don't think that a JDBC wrapper is going to do what > you want. I wasn't thinking about trying to do the whole thing under the JDBC driver. Mainly I was thinking that one key point is that you need to treat the lucene index somewhat like a cache. This also means that you have to watch database writes and make sure you update your cache, which means you have to have some sort of single point of data access to monitor. Well, we already have that - it's called the JDBC driver. The general design I was eyeing speculatively is basically that the driver would be set up with a reference to an object that implements a CacheManager interface. This interface basically gives the driver a way to notify the cache manager of when certain tables and columns are being edited. Exactly how is another question. I don't know enough of the innards of, say, a PreparedStatement, to say more. It could be as simple as sending the CacheManager a copy of every SQL query string and letting the CacheManager figure out the rest. Ideally I'd like it to be a little bit more structured. From there, it's the CacheManager's job to decide what to do about it, and how to do it. This leaves the tricky issue of mapping from a specific database to a specific lucene index up to the developer. -- Steven J. Owens [EMAIL PROTECTED] "I'm going to make broad, sweeping generalizations and strong, declarative statements, because otherwise I'll be here all night and this document will be four times longer and much less fun to read. Take it all with a grain of salt." - http://darksleep.com/notablog --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]