MyCacheInterceptor.java

@Dependent
@InterceptsRemoteCall({ MyRemoteInterface.class, MyOtherRemoteInterface.class })
public class MyCacheInterceptor implements RpcInterceptor {

  @Inject
  private MyAppCache cache;
  
  @Override
  public void aroundInvoke(final RemoteCallContext context) {
    // e.g check if the result is cached and carry out 
    // the actual call only in case it's not.
  }

}