[cdi-dev] [JBoss JIRA] (CDI-184) Make sure that CDI.current() works in a modular environment

[Pete Muir (JIRA)]

    [ https://issues.jboss.org/browse/CDI-184?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12713465#comment-12713465 ] 

Pete Muir commented on CDI-184:
-------------------------------

I've added the setCDIProvider method - please review https://github.com/jboss/cdi/pull/86

This needs EG meeting review.
                
> Make sure that CDI.current() works in a modular environment
> -----------------------------------------------------------
>
>                 Key: CDI-184
>                 URL: https://issues.jboss.org/browse/CDI-184
>             Project: CDI Specification Issues
>          Issue Type: Feature Request
>            Reporter: Emmanuel Bernard
>             Fix For: 1.1.PRD
>
>
> OSGi containers and other modular environments tend to hide service files and consider them implementation details. That means that a naive current classloader based implementation won't discover the various CDI implementations.
> There are several approaches to try and work around this problem in EE specs
> h4. JPA 2's approach
> JPA 2 does have a static getter / setter pair {code}PersistenceProviderResolverHolder.getPersistenceProviderResolver()
> PersistenceProviderResolverHolder.setPersistenceProviderResolver(){code} 
> which holds the resolver to use. A modular environment is free to override the default resolver.
> h4. Bean Validation's approach
> Bean Validation uses a different approach to work around the nasty static field.
> {code}
> Validation
>   .byDefaultProvider()
>     .providerResolver( myOSGiResolver )
>   .configure() //we have ways to customize the ValidatorFactory further
>   .buildValidatorFactory();
> {code}
> Note that Bean VAlidation approach has another benefit, you can physically ask for a specific Bean Validation provider implementation
> {code}
> Validation
>   .byProvider( HibernateValidator.class )
>   .configure()
>     .ignoreXmlConfiguration() //bean validation configuration
>     .failSafe() //Hibernate specific configuration (type safe)
>   .buildValidatorFactory();
> {code}

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