A JAX-WS web service is by itself a Singleton
http://stackoverflow.com/questions/11096310/singleton-object-in-java-web-service
http://stackoverflow.com/questions/19369484/jax-ws-2-2-web-service-instances-management-on-glassfish-3
http://stackoverflow.com/questions/11096310/singleton-object-in-java-web-service
http://stackoverflow.com/questions/19369484/jax-ws-2-2-web-service-instances-management-on-glassfish-3
