programmatically add roster items and users

hi.

i'm creating an application that interact with openfire jabber server.

my application have to programmatically create Users, RosterItems...

I use a postgresql database and create Users and RosterItems directly on the database.

The problem is that openfire has cached data and the changes won't take effect until server restarts.

Is there any way to force cache renewal, or a better way to add Users and RosterItems etc without writing directly on db?

Thank you in advance

Paolo Chiodi