How to use ZF2's EventManager over multiple classes (and modules)?

Question

I am having the following setup: In a controller I trigger an event and I want to attach multiple listeners to it at other places.

Currently I have the following listener in my onBootstrap :

$e->getApplication()->getServiceManager()->get('EventManager')->attach('*', function($e) {
    var_dump($e->getName());
});

The following piece of code as a factory :

'Application\Controller\Foo' => function(ControllerManager $cm) {
    $eventManager = $cm->getServiceLocator()->get('EventManager');
    $controller = new \Application\Controller\FooController();
    $controller->setEventManager($eventManager);
    return $controller;
},

And finally the following trigger within my controller :

$this->getEventManager()->trigger('foo-finished', 'finishedAction', array(
    'obj' => $foo->someObject()
));

So it should both be the same EventManager as I receive it from the service locator and inject it into the controller. Still I get no output at all. I also tried using $e->getApplication()->getEventManager() when attaching to events, but this only gives me the ZF internal events.

I read about the SharedEventManager , but I do not fully understand why I should pass a context. I tried it like this (which is as I understood it), but still no output.

$e->getApplication()->getServiceManager()->get('EventManager')
    ->getSharedManager()
    ->attach('finishedAction', '*', function() { ... });

So, what am I doing wrong? I just want to trigger events and catch them in possibly different modules, but it seems to be made so complicated...

Answer 1

By default the EventManager service is not shared, this means that every time you call $serviceLocator->get('EventManager') you will get a different instance, that's why you should use the SharedEventManager - take a look at @Crisp's link to see how to use it.

One more tip: Don't try to inject the Mvc EventManager in your objects, each object should trigger their own events.

Answer 2

The following worked for me (not the order of getEventManager and getSharedManager), also note the order of event name and the context (or identifier).

$e->getApplication()->getEventManager()->getSharedManager()->attach('*', 'finishedAction', function() { ... });

Regards!