(module manager mzscheme
  (provide (all-defined))
  
  (define-struct manager (create-instance 
                          adjust-timeout!
                          instance-lookup-data
                          clear-continuations!
                          continuation-store!
                          continuation-lookup))
  
  (define-struct (exn:fail:servlet-manager:no-instance exn:fail) (expiration-handler))
  (define-struct (exn:fail:servlet-manager:no-continuation exn:fail) (expiration-handler)))