Hi Derrell,
Am 26.01.2007 um 15:11 schrieb [EMAIL PROTECTED]:
> Andreas Junghans <[EMAIL PROTECTED]> writes:
>
>> Besides, there's already the "callAsyncListeners" method which has
>> the same purpose as "callAsync" but behaves more "qooxdoo-ish" (using
>> the standard listener concept where you can add a listener with a
>> specific "this" context).
>>
>> However, I think the callAsyncListeners method needs some rework (I
>> don't know who implemented it - Derrell?). I don't see an easy way to
>> find out which server method was called when the result arrives,
>> which makes it hard to have concurrent asynchronous calls. I think we
>> should pass something like {result: ..., methodName: ..., id: ...} to
>> the listeners.
>
> Yes, I implemented it. It's in use in the Samba Web Administration
> Tool in
> samba4, which uses the Finite State Machine to handle all events.
>
> The id is in the result that's passed as data to the listener. In
> fact, in
> the "completed" event handler (Rpc.c:311), we verify that it
> matches the
> sequence number of the request. Is there something other than this
> id that's
> missing? (We've never provided the method name on any async
> response. I
> believe it's up to to the caller to save that information,
> referenced by the
> id, if the caller needs it.)
I think we're talking about different things. What I mean is this use
case:
var rpc = new qx.io.remote.Rpc(...);
rpc.addEventListener("completed", mySuccessListener);
rpc.addEventListener("failed", myFailureListener);
rpc.callAsyncListeners(true, "serverMethod1", param1, param2);
rpc.callAsyncListeners(true, "serverMethod2", param1, param2);
Now look at the code in handleRequestFinished that fires the
"completed" event:
case 2: // async with event listeners
// Dispatch the event to our listeners.
if (! ex) {
eventTarget.createDispatchDataEvent(eventType, result);
What gets passed as event data is the method result (e.g. a string),
not the whole structure (result, id, etc.).
Under these circumstances, when my "completed" listener is called,
how am I supposed to know which of the two methods I called just
returned? All I have is the event type ("completed") and the method
result (e.g. "Foobar"). Did "serverMethod1" return "Foobar", or was
it "serverMethod2"? I don't have an id or anything else that would
tell me. Sure, I call "serverMethod1" first, but maybe it takes much
longer than "serverMethod2".
Regards,
Andreas
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