title: Set JSON provider at RESTEasy on JBoss 7.1.1
body: <p>How could I set JSON provider for RestEasy at JBoss 7.1.1?</p>
  
  <p>RestEasy documentation says:</p>
  
  <blockquote>
    <p>RESTEasy allows you to marshall JAXB annotated POJOs to and from JSON.
    This provider wraps the Jettison JSON library to accomplish this.</p>
  </blockquote>
  
  <p>But I found that it seems that on JBoss 7.1.1 Resteasy uses Jackson provider because @XmlTransient on my class field was ignored, but @JsonIgnore was processed.</p>
  
  <p>How can I tell to Resteasy to use Jettison instead of Jackson?</p>
  
  <p>On Jboss I found both providers.</p>