In attribute requires non-null value:

[oyesiji77]

I defined a component

@Name("storage")
@Scope(ScopeType.SESSION)
@Install
public class Storage {
        
        public Storage(){
                
        }
        public void Shout() {
                System.out.println("I am Shouting");
        }

}

and any time i try to inject it

@In Storage storage;

I get this exceptions

0:07:04,961 ERROR [SeamLoginModule] Error invoking login method
javax.el.ELException: org.jboss.seam.RequiredException: @In attribute requires non-null value: authenticator.storage
        at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:333)
        at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:342)
        at org.jboss.el.parser.AstPropertySuffix.invoke(AstPropertySuffix.java:58)
        at org.jboss.el.parser.AstValue.invoke(AstValue.java:96)
        at org.jboss.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
        at org.jboss.seam.core.Expressions$2.invoke(Expressions.java:175)
        at org.jboss.seam.security.jaas.SeamLoginModule.login(SeamLoginModule.java:109)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at javax.security.auth.login.LoginContext.invoke(LoginContext.java:769)

[joblini]

Add @AutoCreate to the component, or use @In with "create=true"

[kragoth]

Or alternatively add
@Startup to your Storage class. This will instantiate an instance of this component when the session is started.

Plenty of ways to do this.

[allllllan]

@In(create=true) isn't creating an instance of my component for some reason. I have:

@Entity
@Name("account")
public class Account {
......
}


and


@Stateful
@Scope(CONVERSATION)
@Name("accountService")
public class AccountServiceBean implements AccountService {

     @Logger
     Log log;

     @In(create = true) // This isn't creating a new instance if account is null
     @Out(required = true)
     private Account account;


     @Create
     public void init() {
            // My not-so-ideal workaround...
            if (account == null) {
                log.info("Account instance was null here! Should NOT have been null!");
                account = new Account();
             }
        }

.......
}

I get the following if I don't use the @Create method above to init the account component:
javax.faces.el.EvaluationException: javax.ejb.EJBTransactionRolledbackException: @In attribute requires non-null value: accountService.account
        at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:102)
        at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
        at javax.faces.component.UICommand.broadcast(UICommand.java:387)
        at org.ajax4jsf.component.AjaxActionComponent.broadcast(AjaxActionComponent.java:55)
.
.
.
.

I never had this issue in my previous seam project. For some reason, @In(create=true) doesn't seem to work anymore. I've scoured the net looking for anything related to this issue. This post is best I could find. Hoping others in the forum might have seen this issue and offer some advice...

Using seam 2.2.0.GA

thanks

[kragoth]

Try

@In(create=true, required=true)
@Out(required=true)
private Account account;

I have a funny feeling you need the required=true to make it work the way you want.