Access your Java components from Ruby Actions.

Here we examine Ruby based controllers, and the invoking of Java functionaility from them. Consider:
public class MyRegistrar extends AbstractRubyAwareRegistrar { public MyRegistrar(Registrar delegate) { super(delegate); } @Override public void application() { register("person_dao", PersonDAOImpl.class); registerRubyScript("person", "PersonController"); } } A DAO, PersonDAOImpl, is registered under the name "person_dao" and we have one Ruby based controller available. Now its probably safe to assume that this Ruby PersonController will need access to that DAO object. Gaining access to this DAO from the controller is easy in Waffle, just call the locate method:
class PersonController def index @person_dao = locate(example.PersonDAO) @people = @person_dao.findAll render 'person.rhtml' end end Notice that we were able to retrieve the DAO by its interface. Additionally, since this DAO was registered with a key you can use a convention to retrieve the component. The convention is "locate_<component key>", here is the same controller using the locate_ convention:
class PersonController def index @person_dao = locate_person_dao @people = @person_dao.findAll render 'person.rhtml' end end As you can see this makes writing Ruby based Controllers/Actions with Waffle really easy. In my next post I'll detail how to access request parameter and context attributes with ease.