Custom qualifiers

[asookazian]

from ref doc:

@Entity
public class User {
   private @NotNull @Length(min=3, max=25) @Id String username;
   private @NotNull @Length(min=6, max=20) String password;

   public String getUsername() { return username; }
   public void setUsername(String username) { this.username = username; }
   public String setPassword(String password) { this.password = password; }
}

@Qualifier
@Retention(RUNTIME)
@Target({TYPE, METHOD, PARAMETER, FIELD})
public @interface LoggedIn {}

public class DocumentEditor {

   @Inject @LoggedIn User currentUser;

   public void save() {
     //do stuff
   }
}

So you're telling me that if I use that custom qualifier (@LoggedIn), then the CDI container will inject the currently logged in user?  So what would it inject if I did not use @LoggedIn?

Why/how does that work?  So that's assuming that there is more than one User instance available to inject?

And what scope is the injection occurring from (or is scoping a non-issue/irrelevant in CDI due to producer fields/methods)?

[read the spec], I'm getting there...

[gavin.king]

You missed the critical piece of code:

@Produces @LoggedIn User getCurrentUser() { ... }

[asookazian]

So when the container goes to inject an instance (and they're not context variables like in Seam), it must find and use a producer method?

So it's always a 1:1 ratio on injectee and producer???  If there's no producer then the injection fails or is null?

[gavin.king]

No.

Some beans are producer methods. Some beans are just classes. Some beans are neither.

[asookazian]

Ok so you can @Inject in CDI w/o a producer method.  But the variable that is injected is originating from a specific context/scope or not?  IIRC you stated that there are no context variables in CDI...

[nickarls]

A bean only has one scope (@RequestScoped or whatever). It's in that context. Always. Since you can't outject it to another scope.