On Mon, Nov 9, 2009 at 10:10 PM, Jack Widman <[email protected]> wrote:
> The only difference between your working code and mine is that mine has a > process in the background that is always running and puts Foo objects on a > queue whenever they are ready. Where can I start this long running process > so that it doesn't interfere with the lowPriority method that takes things > off the queue and rerenders the page. I tried starting the process in its > own Actor that I start in localSetup but it seems somehow to be blocking the > lowPriority method from doing its thing. > I have no idea what this means... sorry. Please post actual runnable code and we can help you debug. > > On Sun, Nov 8, 2009 at 11:35 PM, David Pollak < > [email protected]> wrote: > >> Jack, >> >> I reproduced your code and it seems to work fine. I've enclosed a working >> copy. >> >> Some comments about your code: >> >> - The foos variable and the foo variable may be getting confused in >> the code... the render method may be rendering the same thing based on the >> unchanging foos variable. >> - Doing null testing is a sign that you have logic errors in your >> code. I strongly recommend using either Box or Option for everything that >> can logically not contain a value/reference. If you're bridging out to >> Java >> code and are expecting null from the Java code, write a small bridge that >> will wrapper the Java return values in Box/Option. >> - You have a case class (Tick) that contains no parameters. Please >> use a case object instead. >> - Your Tick look is a spin loop. You fire a Tick message as part of >> processing the Tick message. I would suggest that if you're polling, that >> you have a reasonable poll interval, otherwise you'll starve your CPU. >> Further, having reRender on each loop through means that you're forcing a >> lot of bytes over the wire rather than only doing a reRender on changed >> values. >> >> Thanks, >> >> David >> >> On Sun, Nov 8, 2009 at 3:47 PM, Jack Widman <[email protected]>wrote: >> >>> Sorry. Here it is: As I said, I know that when render is called, >>> foo.getValue has the right value. But it does not show on the screen, unless >>> I refresh the browser. >>> >>> package com.foo.comet >>> >>> import net.liftweb._ >>> import http._ >>> import js._ >>> import JsCmds._ >>> import net.liftweb.util._ >>> import net.liftweb.http._ >>> import _root_.scala.xml._ >>> import scala.actors._ >>> import com.authoritude.snippet._ >>> import scala.collection.mutable.Queue >>> import net.liftweb.http.SessionVar >>> >>> >>> class MyComet extends CometActor { >>> >>> override def defaultPrefix = Full("auth") >>> >>> private var foos = FooManager.getFoos >>> >>> def createDisplay(foos:List[Foo]):NodeSeq = { >>> <span id="go"><table> >>> { >>> for {foo <- foos} yield <tr><td>{foo.getValue}</td></tr> >>> } >>> >>> </table></span> >>> } >>> >>> def render = { bind("foo" -> createDisplay(foos)) } >>> >>> override def localSetup = { >>> super.localSetup >>> this ! Tick >>> } >>> >>> var foo:Foo = null >>> override def lowPriority = { >>> case Tick => { >>> foo=FooQueue.getLatest >>> if (foo!=null && foo.getValue > -1) { >>> blogs = FooManager.process(foo, foos) >>> } else if (foo!=null){ >>> foos = foos.remove((f:Foo)=>(f.id==foo.id)) >>> } >>> reRender(false) >>> this ! Tick >>> } >>> } >>> } >>> >>> case class Tick >>> >>> >>> >>> On Sun, Nov 8, 2009 at 5:31 AM, Timothy Perrett <[email protected] >>> > wrote: >>> >>>> >>>> Without posting your code it's going to be tough to help you. >>>> >>>> Cheers, Tim >>>> >>>> Sent from my iPhone >>>> >>>> On 8 Nov 2009, at 08:14, jack <[email protected]> wrote: >>>> >>>> > >>>> > By the way, I know that when render is called, all the variables have >>>> > the right values. I just don't see it on the screen unless I refresh >>>> > it. >>>> > >>>> > On Nov 8, 3:12 am, jack <[email protected]> wrote: >>>> >> I have a CometActor. render is called when it is supposed to be but I >>>> >> don't see the changes. If I refresh the page at anytime, I do see the >>>> >> changes. Any idea what might cause this? >>>> > > >>>> > >>>> >>>> >>>> >>> >>> >>> -- >>> Jack Widman >>> >>> co-founder / cto, Authoritude, Inc. >>> >>> 203-641-9355 >>> >>> >>> >>> >> >> >> -- >> Lift, the simply functional web framework http://liftweb.net >> Beginning Scala http://www.apress.com/book/view/1430219890 >> Follow me: http://twitter.com/dpp >> Surf the harmonics >> >> >> >> > > > -- > Jack Widman > > co-founder / cto, Authoritude, Inc. > > 203-641-9355 > > > > -- Lift, the simply functional web framework http://liftweb.net Beginning Scala http://www.apress.com/book/view/1430219890 Follow me: http://twitter.com/dpp Surf the harmonics --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Lift" group. 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