Spring annotation and lifecycle.

Question

I have 2 questions specific to Spring.

1. Does @Component, @Service have to be on the implementation or interface ? And which one is the preferred method ?

2. If there is an external configuration class I have for eg ApplicationConfiguration. How do I hook this class into the Spring lifecycle ? What is the point I should look for ?

Answer 1

1. It should be on the implementation.
2. You should have text .properties file for your configuration.