Factor out commonality from file-system*.rkt examples
This commit is contained in:
Tony Garnock-Jones
parent
e36777584c
commit
e2897d37f4
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@ -2,13 +2,8 @@
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;; Toy file system, based on the example in the ESOP2016 submission.
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;; syndicate/actor implementation, using "during" instead of "on asserted/until retracted".
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(require/activate syndicate/drivers/timer)
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(require (only-in racket/port read-bytes-line-evt))
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(require (only-in racket/string string-trim string-split))
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(struct file (name content) #:prefab)
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(struct save (file) #:prefab)
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(struct delete (name) #:prefab)
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(require/activate "fs-shell.rkt")
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(require/activate "fs-protocol.rkt")
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(actor (react (field [files (hash)])
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(during (observe (file $name _))
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@ -20,46 +15,3 @@
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(on (message (delete name)) (content #f)))
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(on (message (save (file $name $content))) (files (hash-set (files) name content)))
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(on (message (delete $name)) (files (hash-remove (files) name)))))
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(define (sleep sec)
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(define timer-id (gensym 'sleep))
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(until (message (timer-expired timer-id _))
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(on-start (send! (set-timer timer-id (* sec 1000.0) 'relative)))))
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;; Shell
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(let ((e (read-bytes-line-evt (current-input-port) 'any)))
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(define (print-prompt)
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(printf "> ")
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(flush-output))
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(define reader-count 0)
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(define (generate-reader-id)
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(begin0 reader-count
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(set! reader-count (+ reader-count 1))))
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(actor (print-prompt)
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(until (message (inbound (external-event e (list (? eof-object? _)))))
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(on (message (inbound (external-event e (list (? bytes? $bs)))))
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(match (string-split (string-trim (bytes->string/utf-8 bs)))
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[(list "open" name)
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(define reader-id (generate-reader-id))
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(actor (printf "Reader ~a opening file ~v.\n" reader-id name)
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(until (message `(stop-watching ,name))
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(on (asserted (file name $contents))
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(printf "Reader ~a sees that ~v contains: ~v\n"
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reader-id
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name
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contents)))
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(printf "Reader ~a closing file ~v.\n" reader-id name))]
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[(list "close" name)
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(send! `(stop-watching ,name))]
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[(list* "write" name words)
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(send! (save (file name words)))]
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[(list "delete" name)
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(send! (delete name))]
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[_
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(printf "I'm afraid I didn't understand that.\n")
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(printf "Try: open filename\n")
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(printf " close filename\n")
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(printf " write filename some text goes here\n")
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(printf " delete filename\n")])
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(sleep 0.1)
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(print-prompt)))))
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@ -2,15 +2,11 @@
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;; Toy file system, based on the example in the ESOP2016 submission.
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;; Low-level implementation.
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(require (only-in syndicate [assert core:assert]))
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(require/activate syndicate/drivers/timer)
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(require (only-in racket/port read-bytes-line-evt))
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(require (only-in racket/string string-trim string-split))
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(require racket/set)
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(require/activate "fs-shell.rkt")
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(require/activate "fs-protocol.rkt")
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(struct file (name content) #:prefab)
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(struct save (file) #:prefab)
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(struct delete (name) #:prefab)
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(require (only-in syndicate [assert core:assert]))
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(require racket/set)
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(define (file-system-event-handler e files)
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(match-event e
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@ -51,46 +47,3 @@
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(update-file content name new-content)]
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[(message (delete (== name)))
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(update-file content name #f)]))
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(define (sleep sec)
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(define timer-id (gensym 'sleep))
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(until (message (timer-expired timer-id _))
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(on-start (send! (set-timer timer-id (* sec 1000.0) 'relative)))))
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;; Shell
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(let ((e (read-bytes-line-evt (current-input-port) 'any)))
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(define (print-prompt)
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(printf "> ")
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(flush-output))
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(define reader-count 0)
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(define (generate-reader-id)
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(begin0 reader-count
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(set! reader-count (+ reader-count 1))))
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(actor (print-prompt)
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(until (message (inbound (external-event e (list (? eof-object? _)))))
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(on (message (inbound (external-event e (list (? bytes? $bs)))))
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(match (string-split (string-trim (bytes->string/utf-8 bs)))
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[(list "open" name)
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(define reader-id (generate-reader-id))
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(actor (printf "Reader ~a opening file ~v.\n" reader-id name)
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(until (message `(stop-watching ,name))
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(on (asserted (file name $contents))
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(printf "Reader ~a sees that ~v contains: ~v\n"
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reader-id
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name
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contents)))
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(printf "Reader ~a closing file ~v.\n" reader-id name))]
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[(list "close" name)
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(send! `(stop-watching ,name))]
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[(list* "write" name words)
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(send! (save (file name words)))]
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[(list "delete" name)
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(send! (delete name))]
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[_
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(printf "I'm afraid I didn't understand that.\n")
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(printf "Try: open filename\n")
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(printf " close filename\n")
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(printf " write filename some text goes here\n")
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(printf " delete filename\n")])
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(sleep 0.1)
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(print-prompt)))))
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@ -2,15 +2,11 @@
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;; Toy file system, based on the example in the ESOP2016 submission.
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;; Low-level implementation, without subconversation.
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(require (only-in syndicate [assert core:assert]))
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(require/activate syndicate/drivers/timer)
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(require (only-in racket/port read-bytes-line-evt))
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(require (only-in racket/string string-trim string-split))
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(require racket/set)
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(require/activate "fs-shell.rkt")
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(require/activate "fs-protocol.rkt")
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(struct file (name content) #:prefab)
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(struct save (file) #:prefab)
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(struct delete (name) #:prefab)
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(require (only-in syndicate [assert core:assert]))
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(require racket/set)
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(struct fs-state (files monitored) #:prefab)
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@ -52,46 +48,3 @@
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(patch-seq (sub (observe (file ? ?)))
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(sub (save (file ? ?)))
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(sub (delete ?))))
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(define (sleep sec)
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(define timer-id (gensym 'sleep))
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(until (message (timer-expired timer-id _))
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(on-start (send! (set-timer timer-id (* sec 1000.0) 'relative)))))
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;; Shell
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(let ((e (read-bytes-line-evt (current-input-port) 'any)))
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(define (print-prompt)
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(printf "> ")
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(flush-output))
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(define reader-count 0)
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(define (generate-reader-id)
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(begin0 reader-count
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(set! reader-count (+ reader-count 1))))
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(actor (print-prompt)
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(until (message (inbound (external-event e (list (? eof-object? _)))))
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(on (message (inbound (external-event e (list (? bytes? $bs)))))
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(match (string-split (string-trim (bytes->string/utf-8 bs)))
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[(list "open" name)
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(define reader-id (generate-reader-id))
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(actor (printf "Reader ~a opening file ~v.\n" reader-id name)
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(until (message `(stop-watching ,name))
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(on (asserted (file name $contents))
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(printf "Reader ~a sees that ~v contains: ~v\n"
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reader-id
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name
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contents)))
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(printf "Reader ~a closing file ~v.\n" reader-id name))]
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[(list "close" name)
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(send! `(stop-watching ,name))]
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[(list* "write" name words)
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(send! (save (file name words)))]
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[(list "delete" name)
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(send! (delete name))]
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[_
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(printf "I'm afraid I didn't understand that.\n")
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(printf "Try: open filename\n")
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(printf " close filename\n")
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(printf " write filename some text goes here\n")
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(printf " delete filename\n")])
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(sleep 0.1)
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(print-prompt)))))
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@ -2,13 +2,8 @@
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;; Toy file system, based on the example in the ESOP2016 submission.
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;; syndicate/actor implementation.
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(require/activate syndicate/drivers/timer)
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(require (only-in racket/port read-bytes-line-evt))
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(require (only-in racket/string string-trim string-split))
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(struct file (name content) #:prefab)
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(struct save (file) #:prefab)
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(struct delete (name) #:prefab)
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(require/activate "fs-shell.rkt")
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(require/activate "fs-protocol.rkt")
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(actor (react (field [files (hash)])
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(on (asserted (observe (file $name _)))
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@ -21,46 +16,3 @@
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(printf "No remaining readers exist for ~v\n" name)))
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(on (message (save (file $name $content))) (files (hash-set (files) name content)))
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(on (message (delete $name)) (files (hash-remove (files) name)))))
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(define (sleep sec)
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(define timer-id (gensym 'sleep))
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(until (message (timer-expired timer-id _))
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(on-start (send! (set-timer timer-id (* sec 1000.0) 'relative)))))
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;; Shell
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(let ((e (read-bytes-line-evt (current-input-port) 'any)))
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(define (print-prompt)
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(printf "> ")
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(flush-output))
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(define reader-count 0)
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(define (generate-reader-id)
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(begin0 reader-count
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(set! reader-count (+ reader-count 1))))
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(actor (print-prompt)
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(until (message (inbound (external-event e (list (? eof-object? _)))))
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(on (message (inbound (external-event e (list (? bytes? $bs)))))
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(match (string-split (string-trim (bytes->string/utf-8 bs)))
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[(list "open" name)
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(define reader-id (generate-reader-id))
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(actor (printf "Reader ~a opening file ~v.\n" reader-id name)
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(until (message `(stop-watching ,name))
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(on (asserted (file name $contents))
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(printf "Reader ~a sees that ~v contains: ~v\n"
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reader-id
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name
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contents)))
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(printf "Reader ~a closing file ~v.\n" reader-id name))]
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[(list "close" name)
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(send! `(stop-watching ,name))]
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[(list* "write" name words)
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(send! (save (file name words)))]
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[(list "delete" name)
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(send! (delete name))]
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[_
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(printf "I'm afraid I didn't understand that.\n")
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(printf "Try: open filename\n")
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(printf " close filename\n")
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(printf " write filename some text goes here\n")
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(printf " delete filename\n")])
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(sleep 0.1)
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(print-prompt)))))
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@ -2,15 +2,10 @@
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;; Toy file system, based on the example in the ESOP2016 submission.
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;; syndicate/actor implementation, without subconversation.
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(require/activate syndicate/drivers/timer)
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(require (only-in racket/port read-bytes-line-evt))
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(require (only-in racket/string string-trim string-split))
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(require/activate "fs-shell.rkt")
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(require/activate "fs-protocol.rkt")
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(require racket/set)
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(struct file (name content) #:prefab)
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(struct save (file) #:prefab)
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(struct delete (name) #:prefab)
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(actor (react (field [files (hash)] [monitored (set)])
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(on (asserted (observe (file $name _)))
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(printf "At least one reader exists for ~v\n" name)
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@ -30,46 +25,3 @@
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(retract! (file name (hash-ref (files) name #f)))
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(assert! (file name #f)))
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(files (hash-remove (files) name)))))
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(define (sleep sec)
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(define timer-id (gensym 'sleep))
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(until (message (timer-expired timer-id _))
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(on-start (send! (set-timer timer-id (* sec 1000.0) 'relative)))))
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;; Shell
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(let ((e (read-bytes-line-evt (current-input-port) 'any)))
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(define (print-prompt)
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(printf "> ")
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(flush-output))
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(define reader-count 0)
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(define (generate-reader-id)
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(begin0 reader-count
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(set! reader-count (+ reader-count 1))))
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(actor (print-prompt)
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(until (message (inbound (external-event e (list (? eof-object? _)))))
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(on (message (inbound (external-event e (list (? bytes? $bs)))))
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(match (string-split (string-trim (bytes->string/utf-8 bs)))
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[(list "open" name)
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(define reader-id (generate-reader-id))
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(actor (printf "Reader ~a opening file ~v.\n" reader-id name)
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(until (message `(stop-watching ,name))
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(on (asserted (file name $contents))
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(printf "Reader ~a sees that ~v contains: ~v\n"
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reader-id
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name
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contents)))
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(printf "Reader ~a closing file ~v.\n" reader-id name))]
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[(list "close" name)
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(send! `(stop-watching ,name))]
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[(list* "write" name words)
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(send! (save (file name words)))]
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[(list "delete" name)
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(send! (delete name))]
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[_
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(printf "I'm afraid I didn't understand that.\n")
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(printf "Try: open filename\n")
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(printf " close filename\n")
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(printf " write filename some text goes here\n")
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(printf " delete filename\n")])
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(sleep 0.1)
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(print-prompt)))))
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@ -0,0 +1,10 @@
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#lang syndicate/actor
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;; File System Demo protocol
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(provide (struct-out file)
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(struct-out save)
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(struct-out delete))
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(struct file (name content) #:prefab)
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(struct save (file) #:prefab)
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(struct delete (name) #:prefab)
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@ -0,0 +1,51 @@
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#lang syndicate/actor
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;; Simple "shell" or REPL, used by the file-system demos.
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(require (only-in racket/port read-bytes-line-evt))
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(require (only-in racket/string string-trim string-split))
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(require/activate syndicate/drivers/timer)
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(require/activate "fs-protocol.rkt")
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(define (sleep sec)
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(define timer-id (gensym 'sleep))
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(until (message (timer-expired timer-id _))
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(on-start (send! (set-timer timer-id (* sec 1000.0) 'relative)))))
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;; Shell
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(let ((e (read-bytes-line-evt (current-input-port) 'any)))
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(define (print-prompt)
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(printf "> ")
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(flush-output))
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(define reader-count 0)
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(define (generate-reader-id)
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(begin0 reader-count
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(set! reader-count (+ reader-count 1))))
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(actor (print-prompt)
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(until (message (inbound (external-event e (list (? eof-object? _)))))
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(on (message (inbound (external-event e (list (? bytes? $bs)))))
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(match (string-split (string-trim (bytes->string/utf-8 bs)))
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[(list "open" name)
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(define reader-id (generate-reader-id))
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(actor (printf "Reader ~a opening file ~v.\n" reader-id name)
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(until (message `(stop-watching ,name))
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(on (asserted (file name $contents))
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(printf "Reader ~a sees that ~v contains: ~v\n"
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reader-id
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name
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contents)))
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(printf "Reader ~a closing file ~v.\n" reader-id name))]
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[(list "close" name)
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(send! `(stop-watching ,name))]
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[(list* "write" name words)
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(send! (save (file name words)))]
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[(list "delete" name)
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(send! (delete name))]
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[_
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(printf "I'm afraid I didn't understand that.\n")
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(printf "Try: open filename\n")
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(printf " close filename\n")
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(printf " write filename some text goes here\n")
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(printf " delete filename\n")])
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(sleep 0.1)
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(print-prompt)))))
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