Check out this article http://www.javaworld.com/javaworld/jw-05-2002/jw-0524-sql.html
A nice to way to keep the ResultSet in yr db classes and allow your other classes to remain ignorant of db access. -----Original Message----- From: Kirby Vandivort [mailto:[EMAIL PROTECTED] Sent: Wednesday, February 26, 2003 12:59 To: [EMAIL PROTECTED] Subject: [OT] database access philosophy Hello, I'm in the process of converting an old webapp over to using struts and, in the process, I decide to clean up the database access. Old Way: I had written a connection pool and instantiated an instance of this that was passed to all methods that needed the db, and they they had the sql code embedded in the methods. New Way that I'm working on: I've set up a DataSource for my jdbc connection, and I'm partitioning off all of the database access code into it's own package. If my business logic needs database info, it calls a method from the database access package to get it. My problem: Many methods from the database access return simple data. However, I currently have it written so that some of the more complex ones return a ResultSet, which I'm not really happy with. This exposes the DB layer to the business logic, but I'm not totally sure what the best way to avoid this is. In addition, this doesn't work :( because the underlying connection gets closed when the database access method exists, and the ResultSet is no longer valid. SO, I am wondering what people do when they need to return all of the data in a ResultSet to their business layer. Do you have to go to the hassle of copying everything to some sort of data structure, or is there a better, cleaner, faster way to handle this? (I'm kind of assuming that the ResultSet will be small enough to fit in memory and there won't be issues with pulling it in in pieces; how would that be handled, though?) Thanks, -- Kirby Vandivort Theoretical and Computational Biophysics Email: [EMAIL PROTECTED] 3051 Beckman Institute http://www.ks.uiuc.edu/~kvandivo/ University of Illinois Phone: (217) 244-5711 405 N. Mathews Ave Fax : (217) 244-6078 Urbana, IL 61801, USA --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
