Unable to create dynamic JDBC Connections in RMI Server

Question

Hi,
Goal: Using Swing client to connect to a variety of JDBC databases via RMI dynamically....
J2SE : 1.4.2
J2EE: 1.31
Databases: Oracle 9i(R2), MySQL 4.0, MS Access 2000
Platform : Windows 2000 SP4 (Professional and Server)
I have a working client-server application using RMI to connect to a single database. I want the ability
to create JDBC connections dynmically by invoking a RMI method after it has been bound. Presently
I am getting null pointers. Anybody offer any solutions or work arounds?

Answer 1

Goal: Using Swing client to connect to a variety of
JDBC databases via RMI dynamically....Actually what u want from the client swing is to form a Form using the datamodel from the database, invoke query as the client is allowed and wants and update changes. I hope I got it right, thats what u want.
Actually as per my knowledge goes thats what any Database 3-tier program should do.
I have a working client-server application using RMI
to connect to a single database. I want the ability
to create JDBC connections dynmically by invoking a
RMI method after it has been bound. Presently
I am getting null pointers. Anybody offer any
solutions or work arounds?Database connections are only needed as long as the query to the database are being processed. So for ur solution if u have a RMI method that, will invoke first, the database connection and then process the query and then disconnect it , would be enough. When multiple clients will call the method there will be multiple connections to the database as they can have threads working or if u want one process at a time u can sycronize the method. This RMI method will only return the result set of the query and that would be enough for ur solution. Now to be able to say why ur getting null pointers I would need the code u r using.