[jboss-dev-forums] [Design of Messaging on JBoss (Messaging/JBoss)] - Re: JMS specific columns in DB

[clebert.suconic@jboss.com]

I would prefer a normalized database as I have stated before. By normalized I mean.. just having these fields on the table.

On my understanding these tables are the tables for our current JMS implementation. (look at those table names... JMS_message, JMS_reference ...)
 
Adding a new field on the database doesn't mean you are adding dependency to your code. The day we need another system, we will change the JDBCPersistenceManager or implement a new one. To me JDBCPersistenceManager is like a hibernate that maps our columns to databases. If some day we need extra data... we change the
persistenceManager.
 
If some day we have pluggable systems... I would say we will implement plugable persistence managers. and having columns created according to what's plugged/needed. 
 
So.. in another words... if we have a new system... we just implement a new PersistentManager
 


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