Contexts and Dependency Injection Framework

Contexts and Dependency Injection (CDI) is an interface that standardizes dependency injection for Java EE. It defines different annotations for dependency injection like @Named, @Inject, @Scope, @Singleton, etc. Different CDI implementation frameworks provide support and functionality for these annotations.

@Named is used to define a bean and @Inject is used for autowiring one bean into another. Spring supports most of the annotations defined by CDI.

For the code example shown in this lesson, we have created a sub-package called lesson12 inside the package io.datajek.spring.basics.movierecommendersystem.The package contains MovieRecommenderSystemApplication.java, Filter.java, ContentBasedFilter.java, CollaborativeFilter.java, and RecommenderImplementation.java files.To be able to use CDI annotations in our Spring application, we need to add a dependency in the pom.xml file as follows: