I'm not really seeing the issue. Struts is built on Java EE (which was implied if not explicitly stated). The backend in his scenario was built explicitly on JA

I'm not really seeing the issue. Struts is built on Java EE (which was implied if not explicitly stated). The backend in his scenario was built explicitly on JAX-RS (a Java EE component). He could have been a little more explicit, but I'm pretty sure that wasn't the point of his article.