Dependency injection is a very important design principle for working simply and at the same time with major security. It lets us write a very simple code to test. Java uses this principle since Java EE 5 through the CDI specifications.
The first Java frameworks to host this technology were the following:
- Seam: Firstly, it was a set of utilities to work better with web applications. Next, it was discontinued and integrated in the Java EE 5 specifications; now it represents the main standard that a developer must use.
- Spring: This was the first Java dependency injection framework born exclusively for complex Java applications. Now it is an evolved set of plugins where you can build anything through dependency injection. It remains an alternative to Java EE.
Contexts and Dependency Injection (CDI) is a set of annotations and services that make...
