Le 17/05/2011 01:14, renegare a écrit :
Hey, just got my head around how to setup an event listener via the
configuration:
services:
my_listerner_service_name:
class: Namespace\For\My\Listener\CustomListener
tags:
- { name: kernel.listener, priority: 0 }
Then you need to create your class (Namespace\For\My\Listener
\CustomListener) with a 'register' method.
The register method was the old implementation. Please update to the
current one.
But I'm thinking (magento experience) this could be simplified.
Configuration could simply be this:
listeners:
event_name_sting:
class: Namespace\For\My\Listener\CustomListener
method: observe
singleton: true
priority: 0
There will be a class/bundle that knows how to compile this, but the
logic is simply, when the event 'event_name_sting' is dispatched, the
class Namespace\For\My\Listener\CustomListener is initiated and the
method 'observe' (which has only one argument - Event object) is
called.
Note: the singleton parameter, should give added functionality so the
listener created should be kept in memory and not recreated if it were
to be called again for another event ... possibly through another
method.
What you guys think ... or can already be done?
M.
The issue with your proposal is that all listeners would have to be
registered in the configuration of the ListenerBundle. And other bundles
*cannot* change this configuration so all listeners would have to be
registered by the end-user. This does not make any sense.
Thus, as soon as your listener needs to observe several events or have
dependencies, you need to use a service to reuse the listener and inject
the dependencies. This cannot be done with your proposal.
Tags are what is needed here: the FrameworkBundle needs to be able to
get all listeners to register them in the event dispatcher, whatever
bundle they come from.
--
Christophe | Stof
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