Question

Let’s say I’ve two services:

get('my_first_service')
get('my_second_service')

I want to do something like this:

$this->get('my_first_service')->doSomething($this->get('my_second_service'));

This is some initialization code that must be active everywhere in the project. As far as I see I have a few options (both services originates from the vendor-dir (haven’t writtem them myself)):

1. Add the above code (with some modifications) in app.php and/or app_dev.php
2. Add the above code to every controller action
3. Create a service with the services as arguments and add the above code in the constructor

The first option seems a little bit “unusual” as I don’t link editing the app.php file for something link this. The second option is too inefficient as I need to do this for dozens of actions. The third action seems better but I still need to call this service from somewhere in order to execute the constructor right?

I have the feeling I’m missing a possibility… there must be a better place for this kind of initialization code right?

Answer 1

If you really want to do execute your code before EVERY action, you can listen for the event kernel.controller.

Check this example in the cookboook.

Your listener is a service so you can inject both of your services if needed.