Are those all annotations you have on service endpoint implementation class?
If your service is not running on the JavaEE platform, then this annotation is required, in order for resource injection to be performed.
If you are running on the JavaEE platform, then the rules in JSR-244 apply. See http://jcp.org/en/jsr/detail?id=244 Additional reference: JAX-WS 2.1 Specification, section 5.3
subject: JAX WS: WebServiceContext not getting populated