One of the first integration frameworks we discussed in this book was the Contexts and Dependency Injection (CDI) standard. It lets us define how we should bind beans together depending on @Inject annotations, to avoid having to write code to init and bind all our beans together. If we are already using CDI in our application, we have already seen we can use injected Kie Sessions, Kie Containers, and Kie Bases in previous chapter. There is no other required change in our application, other than a CDI implementation dependency.

In our chapter-11/chapter-11-ci example, we use Weld (http://weld.cdi-spec.org/) as an implementation by adding this dependency into our POM file:

<dependency><groupId>org.jboss.weld.se</groupId>
    <artifactId>weld-se-core</artifactId>
    <version>1.1.28.Final</version>
</dependency>

Also, we need to define an empty beans.xml file inside our project, in the src/main/resources/META-INF folder. Doing these two things lets our Java runtime understand it should start injecting beans, depending on our class annotations.