Symfony2服务结构

Question

I am having a hard time understanding Symfony2 services. I have read lots of stuff everywhere (including some here in SO) but none seems to fully explain it.

Suppose I have a bundle A and a separated bundle B. I want B functionality available to the A bundle. I want to inject B in the service container so A will be able to use it.

Which bundle should have a Services directory? Which one should have a configuration file? Both if needed? And where the Extension goes? Why?

Answer 1

Read these two questions and my answers to them first:

• Symfony2 conceptual issue: general bundles vs. specific ones,
• Should everything really be a bundle in Symfony 2?

Assuming you're talking about app specific bundles, I suggest having one bundle only and keep services out it. Then, you could register your services in several ways:

• Directly in the config.yml,
• Creating an extension class in your AppBundle, or
• Via annotations from JMSDiExtraBundle — this is what I prefer personally.