Re: Design validation please?

Phillip Rhodes wrote:
> I need to keep a database in sync with a lucene index.  The database and
> JVM application that updates it may be on a different machine than the
> lucene index.  I was thinking that using a publish/subscribe model would
> solve this problem.
>
> Something like this;
> 1) Java application updates database and publishes message to jms queue
> about the db update
> 2) Java subscribers to the queue update their lucene indexes.
>
> While this sounds good to me, introducing JMS into the application stack
> is of concern since I am already running a database, lucene indexers,
> spring, hibernate, 3+ different war files as part of the techology
> stack, and I am wondering if I am overengineering my idea.
> I would appreciate some validation/repudiation on my idea to use open
> jms in my application.
>   
Sounds like a reasonable approach. A database only approach I have seen 
used, uses triggers to track changes.
Changes are logged to a single table, which is polled by one or more 
applications (effectively the 'subscribers').

> And what exact license does open jms use?
>   
http://openjms.sourceforge.net/license.html
> Is it possible to startup in a container like tomcat as a server, or
> does it need to run as a standalone server?
>
>   
See 
http://article.gmane.org/gmane.comp.java.openjms.user/2624/match=tomcat+server

-Tim


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