CDI object not proxyable with injected constructor

Question

When trying to inject arguments into the constructor of a CDI bean (ApplicationScoped), I\'m encountering the following issue:

Caused by: org.jboss.weld.exceptio         


        

Answer 1

I think Vladimir is pointing you to the right direction.

I'm just learning CDI (and Weld) therefore my answer might not be 100% accurate in all aspects, but it seems like you need to pick a type at injection point that has a no arg constructor.

I hit the same error today with the next type hierarchy:

• there is a provided IServerInterceptor interface,
• there is a custom implementation AuthenticationInterceptor that has one constructor that takes dependencies (fun fact: this knows nothing about (C)DI),
• there is an InjectableAuthenticationInterceptor which has only one injected constructor.

I have another bean where I would like to inject an instance of AuthenticationInterceptor. It works, when I define the field as type IServerInterceptor (as it is an interface and weld can create a proxy for it(?)), but it stops working when I define the field as AuthenticationInterceptor.

With some code:

// IServerInterceptor.java
public interface IServerInterceptor {
}

// AuthenticationInterceptor.java
public class AuthenticationInterceptor extends InterceptorAdapter {
    private final Predicate validAccessTokenString;
    private final Function toAccessTokenModel;
    private final LoginManager loginManager;

    public AuthenticationInterceptor(Predicate validAccessTokenString, Function toAccessTokenModel, LoginManager loginManager) {
        this.validAccessTokenString = validAccessTokenString;
        this.toAccessTokenModel = toAccessTokenModel;
        this.loginManager = loginManager;
    }
    // ...
}


// InjectableAuthenticationInterceptor.java
@ApplicationScoped
public class InjectableAuthenticationInterceptor extends AuthenticationInterceptor {
    @Inject
    public InjectableAuthenticationInterceptor(LoginManager loginManager) {
        super(isWelformedAccessToken(), toAccessToken(), loginManager);
    }
}

Now,

@Inject private IServerInterceptor authenticationInterceptor;

works great, but

@Inject private AuthenticationInterceptor authenticationInterceptor;

does not.