Pippo : CDI

Pippo can be used together with CDI, using Weld as the implementation mechanism.
When Pippo creates new instances of your various Controller subclasses it delegates the instance creation to a ControllerFactory. The module pippo-weld contains WeldControllerFactory that it’s a ControllerFactory implementation that delegates to the Weld container to instantiate a given Controller class. This allows for the instance to be configured via dependency injection.

An example of such a Controller subclass could look as follows:

public class ContactsController extends Controller {

    @Inject
    private ContactService contactService;

    public void index() {
        List<Contact> contacts = contactService.getContacts()
        getResponse().bind("contacts", contacts).render("contacts");
    }

}

Pippo automatically creates the ContactsController instance and pippo-weld injects the ContactService service bean, so basically you don’t have to worry about any of that stuff.

To activate pippo-weld integration in your Application you must register WeldControllerFactory and extend from ControllerApplication instead:

public class MyApplication extends ControllerApplication {

    @Override
    protected void onInit() {
        Weld weld = new Weld();
        WeldContainer container = weld.initialize();

        // registering WeldControllerFactory
        setControllerFactory(new WeldControllerFactory(container));

        // add controller
        GET("/", ContactsController.class, "index");        
    }
    
}

For our demo project the ContactService bean was available in the parent maven module so a Producer was required. For this a utility class was necessary.

public class WeldBeanProducer {

    @Produces
    public ContactService contactService() {
        return new InMemoryContactService();
    }

}

Don’t forget to add pippo-weld as dependency in your project:

<dependency>
    <groupId>ro.pippo</groupId>
    <artifactId>pippo-weld</artifactId>
    <version>${pippo.version}</version>
</dependency>

You can see a demo here

Pippo Micro Java Web Framework

CDI