[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-6047) allow nesting of ServiceRegistry

[Steve Ebersole (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-6047?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=41851#action_41851 ] 

Steve Ebersole commented on HHH-6047:
-------------------------------------

Would really love to "discriminate" the types of services expected/allowed in each.  For example, "basic" or "non-contextual" services would live in one registry while services which require access to or are better implemented as scoped to the session factory would live in a second.  The basic registry would be the parent of the {{SessionFactory}}-specific one.

I went dow this path:
{code}
public interface Service<T> extends Serializable {
}

public interface ServiceRegistry<T> extends Serializable {
    public <R extends Service> R getService(Class<R> serviceRole);
    public <R extends Service<T>> void registerService(Class<R> serviceRole, R service);
    public <R extends Service<T>> void registerServiceInitiator(ServiceInitiator<R> initiator);
}
{code}

but started running into typing issues way beyond my skills.  

> allow nesting of ServiceRegistry
> --------------------------------
>
>                 Key: HHH-6047
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-6047
>             Project: Hibernate Core
>          Issue Type: Task
>          Components: core
>    Affects Versions: 4.0.0.Alpha1
>            Reporter: Steve Ebersole
>            Assignee: Steve Ebersole
>             Fix For: 4.0.0.Alpha2
>
>
> Parent delegation pattern

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