37 lines
1.4 KiB
Racket
37 lines
1.4 KiB
Racket
#lang syndicate-monolithic
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(require "../drivers/tcp.rkt")
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(require "../demand-matcher.rkt")
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(spawn-tcp-driver)
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(define server-id (tcp-listener 5999))
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(define (spawn-connection-handler c)
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(log-info "spawn-connection-handler ~v" c)
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(define (connection-handler e n)
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(when e (log-info "connection-handler ~v: ~v /// ~v" c e n))
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(match e
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[(scn (? trie-empty?)) (quit)]
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[(message (tcp-channel src dst #"quit\n"))
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(quit (message (tcp-channel dst src #"OK, then.\n")))]
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[(message (tcp-channel src dst bs))
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(transition n (message (tcp-channel dst src (string->bytes/utf-8
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(format "You said: ~a" bs)))))]
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[_
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(and (< n 5)
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(transition (+ n 1) (message (tcp-channel server-id c (string->bytes/utf-8
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(format "msg ~v\n" n))))))]))
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(spawn connection-handler
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0
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(scn/union (subscription (advertise (tcp-channel c server-id ?)))
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(subscription (tcp-channel c server-id ?))
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(advertisement (tcp-channel server-id c ?)))))
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(spawn-demand-matcher (advertise (tcp-channel (?!) server-id ?))
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(observe (tcp-channel (?!) server-id ?))
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spawn-connection-handler
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(lambda (c)
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(log-info "Connection handler ~v decided to exit" c)
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'()))
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