Enterprise Edition Controller events not firing if Full Page Cache is enabled

Question

So on one of our recent launches we had a lot of events that we were observer such as controller_action_predispatch. Once the site went live we started noticing that our obs

Answer 1

controller_front_send_response_before

This event will be fired irrespective of FPC enabled

Answer 2

The only reliable event to listen for with and without Full Page Cache enabled is http_response_send_before.

Answer 3

See here if you want to learn how Caching works with Magento Enterprise

http://magentophp.blogspot.com/2011/02/magento-enterprise-full-page-caching.html

Answer 4

Given the nature of the full page caching, I'd call this "works as intended". While it can be a little strange not to have some events firing, they had to pick a line and this one makes sense to me, especially since the controller is never really dispatched.

You should use those controller dispatch events for anything that affects the page (as it still needs to be generated), but if you are using it for tracking and such, no it would not be appropriate.