Actframework依赖注入 II - 注入对象类型

// Demonstrate inject to field
@Controller("user")
public class UserService {

    @javax.inject.Inject
    private MorphiaDao<User> userDao;

    @PostAction
    public void create(User user) {
        userDao.save(user);
    }

}

// Demonstrate inject to parameter
@Controller("user")
public class UserService {

    @PostAction
    public void create(User user, MorphiaDao<User> userDao) {
        userDao.save(user);
    }

}

// The Model
@Entity("user")
public class User extends MorphiaModel<User> {
    
    public String email;
    ...

    public static class Dao extends MorphiaDao<User> {
        public User findByEmail(String email) {
            return findOneBy("email", email);
        }
    }
}

// The controller
@Controller("user")
public class UserService {

    @javax.inject.Inject
    private User.Dao userDao;

    @GetAction("{email}")
    public User findByEmail(String email) {
        return userDao.findByEmail(email);
    }

}

// A class with public default constructor
public class Foo {
    public Foo() {...}
}

// A class with Inject constructor
public class Bar {
    @javax.inject.Inject
    public Bar(Foo foo) {...}
}

public class XxxController {
    @Inject Foo foo;
    @Inject Bar bar;

    ...
}

public class XxxController {

    // foo and bar won't be able to injected throght DI
    // instead they will be deserialized from form parameters
    @PostAction("/xxx")
    public void xxxAction(Foo foo, Bar bar) {
    }
}

public class YyyController {

    // this time foo and bar will be injected through DI
    @PostAction("/yyy")
    public void xxxAction(@Provided Foo foo, @Provided Bar bar) {
    }
}

// The interface
public interface MyService {
    void service();
}

// The implemention one
public class OneService implements MyService {
    public void service() {Act.LOGGER.info("ONE is servicing");}
}

// The implemention two
public class TwoService implements MyService {
    public void service() {Act.LOGGER.info("TWO is servicing");}
}

// Define bindings
public class MyModule extends org.osgl.inject.Module {
    protected void configure() {
        bind(MyService.class).to(OneService.class);
        bind(MyService.class).named("two").to(TwoService.class);
    }
}

// Inject the service
public class Serviced {
    @Inject
    private MyService one;

    @Inject
    @Named("two")
    private MyService two;
}