dependency injection - Meaning of bean discovery mode annotated in CDI 1.1

Question

I am migrating an application to Java EE 7 and would like to CDI 1.1. But I don't get the meaning of bean-discovery-mode="annotated". The CDI 1.1 specification is not very helpful. At least I have not found any useful paragraph. Did I miss it?

This example runs perfectly with bean-discovery-mode="all" and injects an instance of LoggingClass:

public class LoggingClass {
    public Logger logger = Logger.getLogger("ALOGGER");

}

@Test
public class MMLoggerProducerIT extends Arquillian {

    @Inject private LoggingClass lc;

}

But if I change from bean-discovery-mode="all" to bean-discovery-mode="annotated" the container is not able to inject an instance into the field lc.

How do I have to annotate LoggingClass to use bean-discovery-mode="annotated" correctly?

Answer 1

When using bean-discovery-mode="annotated" only classes with a bean defining annotation are discovered. All other classes are ignored. Any scope type is a bean defining annotation. If a scope type is declared on a bean class, then the bean class is said to have a bean defining annotation [spec]. The 1.1 spec is not completely clear here. Only classes with a @NormalScope scope or @Dependent pseudo scope are discovered, @javax.inject.Singleton and all other @Scope (pseudo) scopes are ignored.

Note that the definition of a "bean defining annotation" changed in CDI 1.2 and is now very well defined:

The set of bean defining annotations contains:

• @ApplicationScoped, @SessionScoped, @ConversationScoped and @RequestScoped annotations,
• all other normal scope types,
• @Interceptor and @Decorator annotations,
• all stereotype annotations (i.e. annotations annotated with @Stereotype), and the @Dependent scope annotation.