ClientExecutionInterceptors
31.4. ClientExecutionInterceptors org.jboss.resteasy.spi.interception.ClientExecutionInterceptor classes only are usable on the client side. They run after the MessageBodyWriter and after the ClientRequest has been totally built on the client side. They wrap around the actually HTTP invocation that goes to the server. Resteasy GZIP support uses them to set the Accept header to contain "gzip, deflate" before the request goes out. The Resteasy client cache uses it to check to see if its cache contains the resource before going over the wire