actorise the relay
This commit is contained in:
parent
edfb1a9250
commit
9af8adee79
|
@ -42,63 +42,48 @@
|
|||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||
;; Connections
|
||||
|
||||
(struct connection-state (client-id tunnelled-gestalt) #:transparent)
|
||||
|
||||
(define (ping-interval) (* 1000 (max (- (ws-idle-timeout) 10) (* (ws-idle-timeout) 0.8))))
|
||||
|
||||
(define (spawn-connection-handler c server-id)
|
||||
(define (send-event e s)
|
||||
(send (websocket-message server-id
|
||||
(connection-state-client-id s)
|
||||
(jsexpr->string (lift-json-event e)))
|
||||
#:meta-level 1))
|
||||
(define ((handle-connection-routing-change g) s)
|
||||
(if (gestalt-empty? g)
|
||||
(transition s (quit)) ;; websocket connection closed
|
||||
#f))
|
||||
(define ((handle-tunnelled-routing-change g) s)
|
||||
(transition s (send-event (routing-update g) s)))
|
||||
(define ((handle-tunnellable-message m) s)
|
||||
(if (gestalt-accepts? (connection-state-tunnelled-gestalt s) m)
|
||||
(transition s (send-event m s))
|
||||
(transition s '())))
|
||||
(define relay-connections
|
||||
(gestalt-union (sub (timer-expired c ?) #:meta-level 1)
|
||||
(sub (websocket-message c server-id ?) #:meta-level 1)
|
||||
(sub (websocket-message c server-id ?) #:meta-level 1 #:level 1)
|
||||
(pub (websocket-message server-id c ?) #:meta-level 1)))
|
||||
(define (connection-handler e s)
|
||||
(match e
|
||||
[(routing-update g)
|
||||
(sequence-transitions
|
||||
(transition s '())
|
||||
(handle-connection-routing-change (gestalt-filter g relay-connections))
|
||||
(handle-tunnelled-routing-change
|
||||
(gestalt-filter g (connection-state-tunnelled-gestalt s))))]
|
||||
[(? message? m)
|
||||
(sequence-transitions
|
||||
(match m
|
||||
[(message (websocket-message from to data) 1 #f)
|
||||
(match (drop-json-action (string->jsexpr data))
|
||||
(actor #:name relay
|
||||
#:state [tunnelled-gestalt (gestalt-empty)]
|
||||
|
||||
(send #:meta-level 1 (set-timer c (ping-interval) 'relative))
|
||||
(subscribe (timer-expired c ?)
|
||||
#:meta-level 1
|
||||
(send #:meta-level 1 (set-timer c (ping-interval) 'relative))
|
||||
(send-event 'ping))
|
||||
|
||||
(observe-advertisers (websocket-message c server-id ?)
|
||||
#:meta-level 1
|
||||
#:presence peer-connected?
|
||||
(when (not peer-connected?) (quit)))
|
||||
|
||||
(advertise (websocket-message server-id c ?) #:meta-level 1)
|
||||
(subscribe (websocket-message c server-id ($ data))
|
||||
#:meta-level 1
|
||||
#:run-transition (handle-incoming (drop-json-action (string->jsexpr data))))
|
||||
|
||||
(define (handle-incoming data)
|
||||
(match data
|
||||
[(routing-update g-unfiltered)
|
||||
(define g (gestalt-transform g-unfiltered
|
||||
(lambda (ml l p) (if (zero? ml) p '(#f . #f)))))
|
||||
(transition (struct-copy connection-state s [tunnelled-gestalt g])
|
||||
(routing-update (gestalt-union g relay-connections)))]
|
||||
(lambda (ml l p) (if (zero? ml) p '(#f . #f)))))
|
||||
(begin-transition
|
||||
#:update [tunnelled-gestalt g]
|
||||
#:update-routes)]
|
||||
[(? message? m)
|
||||
(transition s (if (zero? (message-meta-level m)) m '()))]
|
||||
(begin-transition
|
||||
(when (zero? (message-meta-level m)) m))]
|
||||
['ping
|
||||
(transition s (send-event 'pong s))]
|
||||
(begin-transition (send-event 'pong))]
|
||||
['pong
|
||||
(transition s '())])]
|
||||
[(message (timer-expired _ _) 1 #f)
|
||||
(transition s (list (send (set-timer c (ping-interval) 'relative) #:meta-level 1)
|
||||
(send-event 'ping s)))]
|
||||
[_
|
||||
(transition s '())])
|
||||
(handle-tunnellable-message m))]
|
||||
[#f #f]))
|
||||
(list (send (set-timer c (ping-interval) 'relative) #:meta-level 1)
|
||||
(spawn connection-handler
|
||||
(connection-state c (gestalt-empty))
|
||||
relay-connections)))
|
||||
(begin-transition)]))
|
||||
|
||||
(observe-gestalt tunnelled-gestalt
|
||||
[event ;; routing-update or message, prefiltered by tunnelled-gestalt
|
||||
(send-event event)])
|
||||
|
||||
(define (send-event e)
|
||||
(send #:meta-level 1
|
||||
(websocket-message server-id c (jsexpr->string (lift-json-event e)))))))
|
||||
|
|
Loading…
Reference in New Issue