On Tue, Feb 3, 2009 at 1:06 PM, Alli <allilis...@gmail.com> wrote:
>
> Evening,
>
> During the lifetime of a session, the session may have uploaded bunch
> of files and these need to be able to be destroyed/unlinked when a
> session ends.
>
> When user uploads a file it's parent dir is determined by the session
> unique ID and the remote address of the uploader. The name is e.g. /
> tmp/sha1 hash of session id and remote address'. This means in order
> to determine what to destroy I need to know what remote address the
> session belongs to. I am setting that when uploading a file has been
> uploaded successfully.
>
> In Boot.scala I want to do something like:
> // Set session handler.
> LiftSession.onAboutToShutdownSession = List[LiftSession => Unit](
> session => {
> var sessId = session.uniqueId
> val remoteIp = session.get("remoteAddress")
> val myTempDir = new TempDirWeb(sessId, remoteIp)
> myTempDir.unlinkall()
> })
>
> Problem with this is that the LiftSession.get[T]() method is package
> private (liftweb). I can think of some other scenarios where one would
> need access to the session variables before destroying the session.
>
> Does this make sense or is my design just plain wrong? :).
get is typesafe, so exposing it would make it not type safe. It's always
accessed via SessionVars.
You can do something like:
object ReportAddress extends SessionVar[String]("") {
def cleanUp() {
S.session.map{ sess =>
val td = new TempDirWeb(sess.uniqueId, this.is)
td.unlinkall()
}
}
registerCleanupFunc(cleanUp _)
}
Each SessionVar (and RequestVar) has a cleanup func that will be called as
the Var is going away.
>
> Cheers,
> Alfred
>
>
>
> >
>
--
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
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