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From "Andrew Robinson" <andrew.rw.robin...@gmail.com>
Subject Re: Lazy loading tree is crashed by fast clicking users
Date Tue, 25 Mar 2008 16:06:51 GMT
I personally do not. I would recommend a search of the archives for
double click as that has the same issue (user double clicking a
command button for example)

-Andrew

On Tue, Mar 25, 2008 at 10:00 AM, Martin Schlierf <M.Schlierf@cadenas.de> wrote:
> Thanks,
>  I already thought about disabling the client but I thought there has to be a
>  way to fix that issue in a user friendlier way. But perhaps there is no way
>  around this.
>
>  Do you know an easy way to sync the views, I don't know where to do that.
>
>
>
>  -----Ursprüngliche Nachricht-----
>  Von: Andrew Robinson [mailto:andrew.rw.robinson@gmail.com]
>  Gesendet: Dienstag, 25. März 2008 16:40
>
>
> An: MyFaces Discussion
>  Betreff: Re: Lazy loading tree is crashed by fast clicking users
>
>  making everything synchronized will probably not help as the component
>  and renderer are not thread safe and they interact with the model at
>  different times. Just synchronizing methods will not protect the
>  critical section of the code. You should probably either (1) disable
>  the client side on form submit to prevent multiple clicks or (2)
>  synchronize access to the view for a user so that if the view is
>  posted twice the second has to wait for the first to fully complete
>  the faces lifecycle or (3) throw an exception using a counter if the
>  user does not wait for the first and force them to reload the page,
>  losing all of their state for being such a naughty user. A combination
>  of all 3 may be helpful.
>
>  -Andrew
>
>  On Tue, Mar 25, 2008 at 7:11 AM, Martin Schlierf <M.Schlierf@cadenas.de>
>  wrote:
>  > The code for the lazy loading method is very complicated in my app.
>  >  I use java code to call an application that gets the nodes through a VB
>  >  interface from an Application written in C++.
>  >
>  >  I think the problem is not the lazy loading itself but the
>  treewalker.next()
>  >  or the HTMLTreeRenderer
>  >
>  >  Anyway, thanks for your help, I just want to know if there are people
>  here
>  >  that have seen errors like that with their implementations.
>  >
>  >  The problem is that if users are clicking very fast, without waiting util
>  >  one node has opened, the renderer hangs (not my lazy loading).
>  >
>  >  So it looks for me that in the treewalker, there are some variables
>  >  manipulated by other threads or something, but I made everything
>  >
>  > synchronized.
>  >
>  >  -----Ursprüngliche Nachricht-----
>  >  Von: Andrew Robinson [mailto:andrew.rw.robinson@gmail.com]
>  >  Gesendet: Dienstag, 25. März 2008 14:01
>  >
>  >
>  > An: MyFaces Discussion
>  >  Betreff: Re: Lazy loading tree is crashed by fast clicking users
>  >
>  >  That didn't clarify anything at all. Please show us code, we are not
>  >  mind readers :)
>  >
>  >
>  >  On 3/25/08, Martin Schlierf <M.Schlierf@cadenas.de> wrote:
>  >  > Hello, I wrote my own tree nodes.
>  >  > In the getChildren() method I load the child nodes from the file
>  system.
>  >  > The methods for loading the child nodes are all synchronized...
>  >  >
>  >  > -----Ursprüngliche Nachricht-----
>  >  > Von: Andrew Robinson [mailto:andrew.rw.robinson@gmail.com]
>  >  > Gesendet: Donnerstag, 20. März 2008 16:27
>  >  > An: MyFaces Discussion
>  >  > Betreff: Re: Lazy loading tree is crashed by fast clicking users
>  >  >
>  >  > How are you lazy loading the tree2. There is no built in support for
>  >  > it, so your problem is completely dependent on your implementation of
>  >  > it.
>  >  >
>  >  > On Thu, Mar 20, 2008 at 6:00 AM, Martin Schlierf
>  <M.Schlierf@cadenas.de>
>  >  > wrote:
>  >  > >
>  >  > >
>  >  > >
>  >  > >
>  >  > > Hi,
>  >  > >
>  >  > > I'm facing problems with a lazy loading Tree2.
>  >  > >
>  >  > > My nodes load data from the file system to get its children in the
>  tree.
>  >  > > This takes some seconds to load.
>  >  > >
>  >  > >
>  >  > >
>  >  > > For example the user gets the root node which has 5 child nodes.
>  >  > >
>  >  > > If the user clicks on all 5 plus signs to open the nodes the renderer
>  >  > never
>  >  > > finishes. If the user just clicks one node and waits it is no
>  problem.
>  >  > >
>  >  > >
>  >  > >
>  >  > > It may be that my implementation of the nodes has error but I cannot
>  >  find
>  >  > > them.
>  >  > >
>  >  > >
>  >  > >
>  >  > > Has anyone seen such problems with a own lazy loading node tree
>  >  structure?
>  >  > >
>  >  > >
>  >  > >
>  >  > > Thanks, Martin
>  >  > >
>  >  > >
>  >  >
>  >  >
>  >
>  >
>
>

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