An underlying question may be whether a ConnectionAdaptor or a DataAdaptor is a business class. I believe it would really be a data access or resource-layer class that is provided for the use of business classes (or other data access class). Such an adaptor can be ~configured~ with a DataSource that is then used (internally) to provide a connection to the business classes (a la Struts).
-Ted. Craig R. McClanahan wrote: > > On Fri, 6 Sep 2002, Craig Tataryn wrote: > > >>Date: Fri, 06 Sep 2002 17:57:42 -0500 >>From: Craig Tataryn <[EMAIL PROTECTED]> >>Reply-To: Struts Users Mailing List <[EMAIL PROTECTED]> >>To: [EMAIL PROTECTED] >>Subject: Re: Alternative Datsource Hot-potatoing... >> >>Thanks Ted, I'll check it out. But just out of curiosity, why would you >>ever want your Business Layer to know about Datasources? >> >>Craig. >> > > This "Craig" stuff is going to get confusing :-). > > The strategic issue, IMHO, is that you want business layer classes to know > the absolute minimum information possible to achieve its objectives. In > the particular case at hand, the minimum possible knowledge would be > what java.sql.Connection to use for their JDBC activities. If you're in a > batch-mode single threaded application, why would you want to go to all > the effort to establish a DataSource object, when you'd only ever use a > single Connection from it? If you're going to pass in a reference to a > JDBC-something object, it seems better to me that you pass a Connection > instead -- that way a batch app can pass the one-and-only Connection it > creates, and the business logic layer is none the wiser. > > Craig (McClanahan :-) > > > > -- > To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> > For additional commands, e-mail: <mailto:[EMAIL PROTECTED]> > > -- Ted Husted, Husted dot Com, Fairport NY US co-author, Java Web Development with Struts Order it today: <http://husted.com/struts/book.html> -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
