Been testing this stuff and my object is like this:
object ReportAddress extends SessionVar[String]("") {
def cleanUp() = {
println(S.session)
S.session.map { sess =>
println("Session ID: " + sess.uniqueId)
println("REM ADDRESS: " + this.is)
val tempDir = ...
// Remove the temporary dir for this session.
tempDir.destroy()
}
}
registerCleanupFunc(cleanUp _)
}
println(S.session) always gives me "Empty"
Any idea what could cause this?
On Feb 3, 10:38 pm, David Pollak <feeder.of.the.be...@gmail.com>
wrote:
> On Tue, Feb 3, 2009 at 2:13 PM, Alli <allilis...@gmail.com> wrote:
>
> > Makes a lot of sense, thanks David.
>
> > Always amazes me how good and clean the design of lift is.
>
> Flattery will get you a lot... :-)
>
>
>
>
>
> > On Feb 3, 9:49 pm, David Pollak <feeder.of.the.be...@gmail.com> wrote:
> > > 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 frameworkhttp://liftweb.net
> > > Beginning Scalahttp://www.apress.com/book/view/1430219890
> > > Follow me:http://twitter.com/dpp
> > > Git some:http://github.com/dpp
>
> --
> Lift, the simply functional web frameworkhttp://liftweb.net
> Beginning Scalahttp://www.apress.com/book/view/1430219890
> Follow me:http://twitter.com/dpp
> Git some:http://github.com/dpp
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