once the size() is requested and then iterator() is requested (so that are 2
calls to the dataprovider)
And if you know the set is not that large you can do it in one sql call
instead of 2.
(and not all db's are supporting start and limit in sql anyway so you need
to query them)
johan
On 1/18/07, Igor Vaynberg <[EMAIL PROTECTED]> wrote:
im not really sure what/where/why would be asked for twice?
dataview caches the size() for the duration of the request, and iterator()
is only called once per request...
-igor
On 1/18/07, Tim Squires <[EMAIL PROTECTED]> wrote:
>
> Thanks Igor, the DataProvider /was/ caching the results. Do you know if
> there's a nice way of retrieving the iterator and size without
> retrieving the results twice?
>
> i.e. I currently have
>
> public Iterator iterator(int first, int count) {
> return
> ATMInstallsDao.getFromApplicationContext().getAllTasks().subList(first,
> first + count)
> .iterator();
> }
>
> public int size() {
> return
> ATMInstallsDao.getFromApplicationContext().getAllTasks().size();
> }
>
> Since it's using Sping/Hibernate/EhCache it does not actually go back to
> the database but it would be nice not to ask the cache for the results
> twice.
>
> Thanks,
> Tim
>
> ________________________________
>
> From: [EMAIL PROTECTED]
> [mailto: [EMAIL PROTECTED] On Behalf Of Igor
> Vaynberg
> Sent: 17 January 2007 16:07
> To: wicket-user@lists.sourceforge.net
> Subject: Re: [Wicket-user] DataView modelChanged
>
>
> you dont need to do anything. next request the dataprovider is polled
> again. if the dataview really doesnt refresh make sure your
> dataprovider/orm layer are not doing any caching.
>
> -igor
>
>
>
> On 1/17/07, Tim Squires <[EMAIL PROTECTED]> wrote:
>
> Hi again,
>
> I have a simple DataView where one of the columns contains a
> Link which
> onClick modifies the data. What is the best way of telling the
> DataView
> that the model has changed. I've tried a few things, see the
> comments
> in the code....
>
> Thanks for your help,
> Tim
>
> DataView dataView = new DataView("tasks",
> new UserTaskDataProvider(user))
> {
>
> protected void populateItem(final Item
> item) {
> final TaskInstance task =
> (TaskInstance)
> item.getModelObject();
>
> item.add(new Label("taskName",
> task.getName()));
>
> // add a link that, when
> clicked,
> assigns the task back to
> // the group
> Link assignLink = new
> Link("assignLink")
> {
> @Override
> public void onClick() {
>
> ATMInstallsDao.getFromApplicationContext ()
>
> .assignTaskToGroup(task.getId(),
>
> "InstallsTeam");
>
>
> //-------------PLEASE
> HELP WITH THIS BIT---------
>
>
>
> // tell wicket
> that
> we've changed the model so it
> // updates the
> page
>
> //tried.......
>
> //
> modelChanged(); -
> does nothing (the Link objects model??)
> //
> DataView.this.modelChanged (); - does not compile no DataView
> parent???
> // This works
> but is not
> really the most efficient!.....
>
> getRequestCycle().setResponsePage(new UserTasksPage(userName));
>
>
>
>
>
> //------------------------------------------------
>
> }
> };
> assignLink.add(new
> Label("assignLinkLabel",
> "assign to
> group"));
> item.add(assignLink);
>
>
> }
> };
>
>
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