Spring framework Flashcards
1
Q
What stereotype annotations are there in spring?
A
- @Component - generic
- @Controller - controller in spring mvc web app
- @Service - class in business layer
- @Repository - class working with spring data repositories
- @Configuration - class with @Beans
- @RestController - specialised controller combining @Controller & @ResponseBody
2
Q
How could you add a bean for test purposes in spring?
A
- create a @TestConfiguration class
- explicitly @Import into test class as this type of stereotype isn’t picked up by component scanning and so won’t be picked up by other test classes
3
Q
What is IOC in the spring framework?
A
inversion of control - the ioc container manages the lifecycle of beans in the conxtext, instead of in the app.
4
Q
What is DI in spring?
A
When the ioc container injects dependencies from the context into the bean via e.g constructor injection.
5
Q
What is component scanning in spring?
A
- telling spring what paths to look at for picking up annotated classes
- default paths can be defined and packaged excluded
6
Q
What is a Messaging Gateway?
A
A messaging gateway typically acts as a translation mechanism, abstracting the details of formatting, protocols, and message transfer to enable communication between different systems by ensuring compatibility and understanding on the receiving end.
