[Laszlo-dev] Fwd: [JIRA] Created: (LPP-4632) Dataset doesn't send oninit event

[P T Withington]

On 2007-09-03, at 09:41 EDT, Henry Minsky wrote:

> On 9/3/07, P T Withington <ptw at openlaszlo.org> wrote:
>> It would make sense to me that a static dataset would send an
>> 'ondata' event at startup.  It seems like a reasonable thing to  
>> expect.
>>
>> But.  I bet that is going to raise the issue of what should happen if
>> someone sends an event and no one is listening.  It is easy for me to
>> imagine that a static dataset might send this event before the
>> relevant listeners have been initialized sufficiently to be  
>> listening.
>>
> I think that's what is happening, the startup for initialiazing the
> dataset calls this routine
> function setData( data , headers ) {
>     if ( data == null ) return;
>     if (data instanceof Array) {
>         this.setChildNodes( data );
>     } else {
>         this.setChildNodes( [data] );
>     }
>
>     this.data = data;
>
>     if ('responseheaders' in this && this.responseheaders != null) {
>         this.responseheaders.destroy();
>     }
>     this.responseheaders = headers;
>
>     if (this.ondata.ready) this.ondata.sendEvent( this );
> }
>
> And I suspect that the last line, "if (this.ondata.ready) " is
> returning false because
> some listener isn't set yet (what makes an event "ready"?)

Well I would propose a wakeup-waiting solution, but I think that is  
too risky for Wafflecone.  Note that implementing that would mean we  
would lose Max's .ready optimization.