Re: [Pharo-project] Announcements question

Nov. 4, 2009

      Hi Keith, thanks for your reply.
I've tried your implementation a bit this way:

| testAnn |
testAnn := WAAnnouncer with: { 1 . 2 }.
testAnn
    subscribe: AnnouncementMockA
    send: #value:
    to: ExampleObject new.
...
testAnn announce: AnnouncementMockA.

but in ExampleObject>>value: anObject

anObject happens to be an AnnouncementMockA and not { 1 . 2 } which is what
I'm trying to achieve. I know I can do anything with the AnnouncementMockA
at signalling time, but I have the collection { 1 . 2 } only at registering
time.
Do you have an example of this behavior with your implementation?

Just thinking, I'm wondering why a subscriber must be a class :

    eventSource
        subscribe: AnnouncementMockA
        send: #value:
        to: anObject.

but not an instance, it could be:

    eventSource
        subscribe: ( AnnouncementMockA named: 'a' with: argument )
        send: #value:
        to: anObject.

this way would prevent announcement class explosion too.

HernÃ¡n

2009/11/4 keith <keith_hodges@yahoo.co.uk>
...
On 4 Nov 2009, at 21:50, HernÃ¡n Morales Durand wrote:
...
Hi, I'm using AXAnnouncements but I suppose this question is valid
for other implementations. In SASE (the "triggerEvent" event
framework) one could subscribe an event for an object specifying an
argument at registration time:
eventSource
  when: #eventName send: #aSelector to: anObject with: argument
I've looked at Announcements and it seems this kind of registration
isn't supported without using blocks. Am I right?
Before getting into details I just want to check. What people do to
specify an argument at registration time with Announcements?
Cheers,
HernÃ¡n
Your announcement is an object of your own design. You can put
parameters as instance variables in your announcement subclass.
The default implementation does not support the ability to send
methods to objects in the manner that you describe.
My Wandering Announcements package does have an enhancement to support
this,
it is available in the squeaksource.com/Jetsam repository.
Keith
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