63 lines
1.8 KiB
Racket
63 lines
1.8 KiB
Racket
|
#lang racket/base
|
||
|
|
|
||
|
|
(require racket/match)
|
||
|
|
(require racket/tcp)
|
||
|
|
(require racket/port)
|
||
|
|
(require minimart)
|
||
|
|
(require minimart/drivers/timer)
|
||
|
|
(require logbook)
|
||
|
|
|
||
|
|
(define L (default-logbook))
|
||
|
|
(define E (standard-logbook-entry L "minimart" "echo-server"))
|
||
|
|
(define Tmem (logbook-table E "memory-use" #:column-spec '(time-ms memory-use)))
|
||
|
|
(define Tconn (logbook-table E "connections" #:column-spec '(time-ms connection-count)))
|
||
|
|
|
||
|
|
(define connection-count 0)
|
||
|
|
|
||
|
|
(define (statistician)
|
||
|
|
(list (spawn (lambda (e s)
|
||
|
|
(match e
|
||
|
|
[(message (timer-expired 'statistician now) _ _)
|
||
|
|
(collect-garbage)
|
||
|
|
(collect-garbage)
|
||
|
|
(collect-garbage)
|
||
|
|
(write-logbook-datum! Tmem (list (/ now 1000.0) (current-memory-use)))
|
||
|
|
(write-logbook-datum! Tconn (list (/ now 1000.0) connection-count))
|
||
|
|
(transition s (send (set-timer 'statistician 10000 'relative)))]
|
||
|
|
[_ #f]))
|
||
|
|
#f
|
||
|
|
(list (sub (timer-expired 'statistician ?))))
|
||
|
|
(send (set-timer 'statistician 10000 'relative))))
|
||
|
|
|
||
|
|
(define (listener port-number)
|
||
|
|
(spawn (lambda (e s)
|
||
|
|
(match e
|
||
|
|
[(message (event _ (list (list in out))) _ _)
|
||
|
|
(transition s (connection in out))]
|
||
|
|
[_ #f]))
|
||
|
|
#f
|
||
|
|
(list (sub (event (tcp-accept-evt (tcp-listen port-number 4 #t)) ?)
|
||
|
|
#:meta-level 1))))
|
||
|
|
|
||
|
|
(define (connection in out)
|
||
|
|
(set! connection-count (+ connection-count 1))
|
||
|
|
(spawn (lambda (e s)
|
||
|
|
(match e
|
||
|
|
[(message (event _ (list (? eof-object?))) _ _)
|
||
|
|
(close-input-port in)
|
||
|
|
(close-output-port out)
|
||
|
|
(set! connection-count (- connection-count 1))
|
||
|
|
(transition s (quit))]
|
||
|
|
[(message (event _ (list line)) _ _)
|
||
|
|
(fprintf out "~a\n" line)
|
||
|
|
(flush-output out)
|
||
|
|
(transition s '())]
|
||
|
|
[_ #f]))
|
||
|
|
#f
|
||
|
|
(list (sub (event (read-line-evt in 'any) ?)
|
||
|
|
#:meta-level 1))))
|
||
|
|
|
||
|
|
(run-ground (listener 5999)
|
||
|
|
(spawn-timer-driver)
|
||
|
|
(statistician))
|