Hi Bernhard.
I'm not sure I follow. With both GetResponseEvent and
PostResponseEvent, I can retrieve the request/response objects. Because
of the way objects pass in PHP, both are mutable in practice.
When I say "info" hooks/events, I don't mean notification events. I
mean "tell me about yourself" data-collection events. For the specific
case at hand, it would be asking all modules to return a RouteCollection
(or in other cases an array of objects, or array of arrays), and then
deliberately allowing other modules to modify that RouteCollection
rather than passing an event that implicitly allows the collection to be
modified by virtue of PHP's object passing semantics.
It's certainly possible that I'm over thinking this, but I know I'm
going to be asked to establish an easy pattern (because Drupal is like
that), so I want to make sure it's a Symfony-friendly pattern.
--Larry Garfield
On 11/7/12 5:16 AM, Bernhard Schussek wrote:
Hi Larry,
Currently, Symfony distinguishes between these sorts of events as you
said, by providing mutable or immutable event objects. If an event
object is immutable, the event is clearly an "info" event. If the event
object is mutable, it would be an "alter" event.
For example, GetResponseEvent [1] in HttpKernel is an "alter" event,
while PostResponseEvent [2] is an "info" event.
I don't think you need a more sophisticated pattern than that.
Cheers,
Bernhard
[1]
https://github.com/symfony/symfony/blob/master/src/Symfony/Component/HttpKernel/Event/GetResponseEvent.php
[2]
https://github.com/symfony/symfony/blob/master/src/Symfony/Component/HttpKernel/Event/PostResponseEvent.php
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