Makes a lot of sense, thanks David. Always amazes me how good and clean the design of lift is.
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 --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Lift" group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~----------~----~----~----~------~----~------~--~---