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More test program

This commit is contained in:
Tony Garnock-Jones 2012-05-09 16:39:25 -04:00
parent d5fe945add
commit 634e795a6c
1 changed files with 24 additions and 6 deletions
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30
os2-tcp-test.rkt
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@ -1,11 +1,26 @@
#lang racket/base
;; Trivial example program demonstrating os2-tcp.rkt.
(require racket/string)
(require racket/set)
(require racket/match)
(require "os2.rkt")
(require "os2-tcp.rkt")
(define (send-to-all local-addr active-remotes speaker line)
(define formatted-line (string->bytes/utf-8
(format "~a: ~a~n" speaker (bytes->string/utf-8 line))))
(for/list ([remote (in-set active-remotes)])
(send-message (tcp-channel local-addr remote formatted-line))))
(define (format-names active-remotes)
(if (set-empty? active-remotes)
#"No-one else is here right now.\r\n"
(string->bytes/utf-8
(string-append*
"These connections are active:\r\n"
(for/list ([remote (in-set active-remotes)]) (format " - ~a\r\n" remote))))))
(define (connection-handler local-addr)
(transition (set) ;; of remote TcpAddresses
(role 'inbound-handler (topic-subscriber (tcp-channel (wild) local-addr (wild)))
@ -18,6 +33,9 @@
[(topic 'publisher (tcp-channel remote-addr (== local-addr) _) #f)
(write `(arrived ,remote-addr)) (newline)
(transition (set-add active-remotes remote-addr)
(send-message (tcp-channel local-addr remote-addr
(format-names active-remotes)))
(send-to-all local-addr active-remotes remote-addr #"<arrived>")
(send-tcp-mode remote-addr local-addr 'lines)
(send-tcp-credit remote-addr local-addr 1))])
#:on-absence (match t
@ -27,15 +45,15 @@
[(topic 'publisher (tcp-channel remote-addr (== local-addr) _) #f)
(write `(departed ,remote-addr)) (newline)
(set-remove active-remotes remote-addr)])
[(tcp-channel remote-addr (== local-addr) (? eof-object?))
(define new-active-remotes (set-remove active-remotes remote-addr))
(transition new-active-remotes
(send-message (tcp-channel local-addr remote-addr #"Goodbye!\r\n"))
(send-to-all local-addr new-active-remotes remote-addr #"<departed>"))]
[(tcp-channel remote-addr (== local-addr) (? bytes? bs))
(transition active-remotes
(send-tcp-credit remote-addr local-addr 1)
(for/list ([remote (in-set active-remotes)])
(send-message (tcp-channel local-addr remote
(string->bytes/utf-8
(format "~a: ~a~n"
remote-addr
(bytes->string/utf-8 bs)))))))])
(send-to-all local-addr active-remotes remote-addr bs))])
(role 'outbound-handler (topic-publisher (tcp-channel local-addr (wild) (wild)))
#:state active-remotes)))