Java Spring Boot Framework notes

https://www.youtube.com/watch?v=mwWJvR_B_XM

What is Inversion of Control?

• It inverts control of the system so execution is not tied to ONE specific piece of code
• Components are not responsible for handling the creation of the dependency’s which it needs

Benefits

• Loose coupling
• Enhanced Testability

What is Dependency Injection?

• Dependency injection is a pattern that implements IoC

• Spring Frameworks IoC will create the objects, wire them together, configure and manage complete lifecycle from creation till destruction.

• The control which is being inverted is the creation of dependencies which our objects will use.

  

Example of How Spring deals with it

1. We have this Class A that is in the Spring IoC Container and Class A’s dependencies are also put in the container as well.
2. The Class A dependencies will be put IN Class A
3. A final object is created and given to us which is ready to use

Types of Dependency Injections