Spring Boot Dependency Injection with Autowiring... wut?

I've been trying to catch up on Java now, doing advanced courses on Coursera featuring graph-theory, data structures and algorithms and all that stuff. Then I went on to do some hands on, practical "How To" type tutorials, and as long as one follows the instructor, all goes well.

The problem arises though, when I try to add some features or new data to the application. All through the tutorials the instructor adds all these @Autowired properties all around, but I can't seem do grok how they are actually populated. I am not even sure where in the app the values for these are initialized or marked or whatever to be used as the value to be magically inserted by the framework.

I do understand that the Spring Boot framework does the magic under the hood using dependency injection, but now how to utilize that magic on purpose and control it.


Did you find this post useful? Show some love!

Hey, I understand the feeling. Spring boot magic can feel a bit overwhelming at first. I thought this might help: docs.spring.io/spring-boot/docs/cu...

Wow, thanks for the tip! That does help and gives me more terms to search for!

Classic DEV Post from Aug 28

Babel 7 is Released!

After almost 2 years of work, Babel 7 is out!

Morten Olsrud
Dev doing sysops and technical project leading, advising and what ever pops up. Working mostly in the web-space these days, but educated and certified (though expired) in Java.

Where the wild code grows

Sign up (for free)