CODEWITHSUNDEEP
constructorcdiinject
Harleen
Harleen

Reputation: 803

unsatisfied or ambiguous dependencies for injection point on a class which has a specific constructor

I have a question related to CDI warning unsatisfied or ambiguous dependencies for injection point.

The piece of code:

@Named(value = "LoginView")
@RequestScoped
public class LoginView implements Serialization {
    private static final long serialVersionUID = 1L;

    @Inject
    private  UserContext userContext;

}

@Named
@ApplicationScoped
public class UserContext implements Serialization {

    public UserContext(String app, String prod, List<String>prodLines) {
        this.app=app;
        this.prod=prod;
        this.prodLines = prodLines;
    }
}

I get:

org.weld.exceptions.DeploymentExceptions: unsatisfied dependencies for type[UserContext] with qualifiers[@Inject] injection point.

If I try to remove @Inject the deployment issue is fixed but the usercontext object is null so throws NullPointerException. I am not using EJB so cannot use @EJB instead of @Inject.

Upvotes: 1

Views: 1450

Answers (1)

Harleen
Harleen

Reputation: 803

The problem is resolved by creating a no-argument constructor in UserContext. There was a parameterized constructor created so the CDI injection could not call the default constructor. We have explicitly created a default no-argmument constructor therefore CDI injection worked. Created beans.xml for Fixing unsatisfied and ambiguous dependencies and added to META-INF. If you have explicitly enable an @Alternative bean that implements the bean type and has the appropriate qualifier types, using beans.xml.

Upvotes: 1

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