Even though Spring is open source and used and supported by a large community, its future development is controlled by a single company (spring source / vmware). As such, its decisions are inherently non-public and certainly influenced by a large number of factors – like the currents demands of the community, but certainly also financial … Read more
Short answer: there is no dedicated debug option for CDI (as no such thing is required by the spec), and no dedicated debug option for Weld. Long Answer: There is a lot you can do on your own. Familiarise yourself with the extension mechanism of CDI, and you’ll discover that you can easily (really!) write … Read more
Replace @FacesConverter(value = “categoryConverter”) by @Named and use <h:inputSomething converter=”#{categoryConverter}” /> or <f:converter binding=”#{categoryConverter}” /> instead of <h:inputSomething converter=”categoryConverter” /> or <f:converter converterId=”categoryConverter” /> By the way, similar problem exist for @EJB inside a @FacesConverter. It however offers a way to be grabbed by JNDI manually. See also Communication in JSF 2.0 – Getting an … Read more
What does Weld do/give you? Weld is the reference implementation of the abstract JSR-299 API, which is better known as CDI, Contexts and Dependency Injection, an API which is provided through javax.enterprise.context and javax.enterprise.inject packages. How does it relate to Java EE 6? JSR-299 is part of Java EE 6 (JSR-316). How would one use … Read more
I can only speak from experience with Guice, but here’s my take. The short of it is that annotation-based configuration greatly reduces the amount you have to write to wire an application together and makes it easier to change what depends on what… often without even having to touch the configuration files themselves. It does … Read more
Constructor and property injection gives you the option to initialize the object even in a non CDI environment easily, e.g a unit test. In a non-CDI environment you can still simply use the object by just passing the constructor arg. OtherBean b = ….; new MyBean(b); If you just use field injection you usually must … Read more
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 … Read more
As you can see, I have declared the annotation “@Local” on the service implementation without defining the local interface. Is it correct? With EJB 3.1, the requirement for local interfaces was dropped. No need to write them unless you explicitly need them. What is the best way to inject one EJB into another one? Couple … Read more
Tomcat as being a barebones JSP/Servlet container doesn’t support CDI out the box. It is not correct to drop jakartaee-api.jar or javaee-api.jar in /WEB-INF/lib just to get your code to compile. The JEE API JAR contains solely the API classes, not the concrete implementation. Get rid of the whole JAR. It can cause many other … Read more
To inject an instance of class C: javax.enterprise.inject.spi.CDI.current().select(C.class).get() This is available in CDI 1.1+