Kris,
You are correct that RequestVar and SessionVar reference the same underlying
data no matter what instances they are part of. There are a bunch of design
reasons for this. If you have a bunch of instance variables that have
different things that need cleaning up, I'd suggest not using RequestVar.
Sorry,
David
On Sat, Sep 27, 2008 at 11:34 AM, Kris Nuttycombe <[EMAIL PROTECTED]
> wrote:
>
> For the record, here's my ugly-ass workaround, depending upon the fact
> that cleanupFunc is called to obtain the cleanup function at the same
> time that the default value is set.
>
> import javax.naming.InitialContext
> import net.liftweb.util.{Can,Full,Log}
> import net.liftweb.http.RequestVar
>
> object JNDIResource {
> val context = new InitialContext()
> }
>
> import JNDIResource._
>
> abstract class JNDIResource[T](val name: String) extends
> RequestVar[T](context.lookup(name).asInstanceOf[T]) {
>
> // This is way too dependent upon an implementation detail of the
> superclass.
> override def cleanupFunc : Can[() => Unit] = {
> Log.debug("Initializing JNDI resource " + name + "(" + this.is + ")")
> initialize(this.is) //this will result in a recursive call, but
> the the order of operations is such that it will take the other
> branch.
>
> Full(() => {
> Log.debug("Releasing JNDI resource " + name + "(" + this.is + ")")
> dispose(this.is)
> })
> }
>
> /**
> * Subclasses should override this method to provide initialization
> of the resource
> */
> protected def initialize(resource : T) {
> }
>
> /**
> * Subclasses should override this method to provide cleanup on the
> resource
> */
> protected def dispose(resource: T) {
> }
> }
>
> >
>
--
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