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(define (tt:keep-running ttdat dbfname dbstruct)
;; at this point the server is running and responding to calls, we just monitor
;; for db calls and exit if there are none.
;; if I am not in the first 3 servers, exit
(let loop ()
(let* ((servers (tt:get-server-info-sorted ttdat dbfname))
(home-host (if (null? servers)
#f
(caar servers)))
(my-index (list-index (lambda (x)
(equal? (list-ref x 6)
(tt-servinf-file ttdat)))
servers))
(ok (cond
((not *server-run*)
(debug:print 0 *default-log-port* "WARNING: received a stop server from client by remote request.")
#f)
((null? servers)
(debug:print 0 *default-log-port* "WARNING: no servinfo files found, this cannot be.")
#f) ;; not ok
((> my-index 2)
(debug:print 0 *default-log-port* "WARNING: there are more than two servers ahead of me, I'm not needed, exiting.")
#f) ;; not ok to not be in first three
(else #t))))
(if ok
(tt-last-access-set! ttdat *db-last-access*) ;; bit silly, just use db-last-access
(begin
(debug:print 0 *default-log-port* "Exiting immediately")
(tt:shutdown-server ttdat)
(exit)))
(let* ((last-update (dbr:dbstruct-last-update dbstruct))
(curr-secs (current-seconds)))
(if (and (eq? (tt-state ttdat) 'running)
(> (- curr-secs last-update) 3)) ;; every 3-4 seconds update the db?
(let* ((sinfo-file (tt-servinf-file ttdat)))
;; (debug:print 0 *default-log-port* "INFO: touching "sinfo-file)
(set! (file-modification-time sinfo-file) (current-seconds))
((dbr:dbstruct-sync-proc dbstruct) last-update)
(dbr:dbstruct-last-update-set! dbstruct curr-secs))))
(if (< (- (current-seconds) (tt-last-access ttdat)) (tt-server-timeout-param))
(begin
(thread-sleep! 5)
(loop)))))
;; (cleanup) ;; all done by tt:shutdown-server
(debug:print 0 *default-log-port* "INFO: Server timed out, exiting from tt:keep-running."))
(define (tt:shutdown-server ttdat)
(let* ((host (tt-host ttdat))
(port (tt-port ttdat))
(sinf (tt-servinf-file ttdat)))
(tt-state-set! ttdat 'shutdown)
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(define (tt:keep-running ttdat dbfname dbstruct)
;; at this point the server is running and responding to calls, we just monitor
;; for db calls and exit if there are none.
;; if I am not in the first 3 servers, exit
(let* ((start-time (current-seconds)))
(let loop ()
(let* ((servers (tt:get-server-info-sorted ttdat dbfname))
(home-host (if (null? servers)
#f
(caar servers)))
(my-index (list-index (lambda (x)
(equal? (list-ref x 6)
(tt-servinf-file ttdat)))
servers))
(ok (cond
((not *server-run*)
(debug:print 0 *default-log-port* "WARNING: received a stop server from client by remote request.")
#f)
((null? servers)
(debug:print 0 *default-log-port* "WARNING: no servinfo files found, this cannot be.")
#f) ;; not ok
((> my-index 2)
(debug:print 0 *default-log-port* "WARNING: there are more than two servers ahead of me, I'm not needed, exiting.")
#f) ;; not ok to not be in first three
((eq? (tt-state ttdat) 'running) #t) ;; we are good to keep going
((> (- (current-seconds) start-time) 30)
(debug:print 0 *default-log-port* "WARNING: over 30 seconds and not yet in runnning mode. Exiting.")
#f)
(else #t))))
(if ok
(tt-last-access-set! ttdat *db-last-access*) ;; bit silly, just use db-last-access
(begin
(debug:print 0 *default-log-port* "Exiting immediately")
(tt:shutdown-server ttdat)
(exit)))
(let* ((last-update (dbr:dbstruct-last-update dbstruct))
(curr-secs (current-seconds)))
(if (and (eq? (tt-state ttdat) 'running)
(> (- curr-secs last-update) 5)) ;; every 5 seconds update the db?
(let* ((sinfo-file (tt-servinf-file ttdat)))
;; (debug:print 0 *default-log-port* "INFO: touching "sinfo-file)
(set! (file-modification-time sinfo-file) (current-seconds))
((dbr:dbstruct-sync-proc dbstruct) last-update)
(dbr:dbstruct-last-update-set! dbstruct curr-secs))))
(if (< (- (current-seconds) (tt-last-access ttdat)) (tt-server-timeout-param))
(begin
(thread-sleep! 5)
(loop)))))
;; (cleanup) ;; all done by tt:shutdown-server
(debug:print 0 *default-log-port* "INFO: Server timed out, exiting from tt:keep-running.")))
(define (tt:shutdown-server ttdat)
(let* ((host (tt-host ttdat))
(port (tt-port ttdat))
(sinf (tt-servinf-file ttdat)))
(tt-state-set! ttdat 'shutdown)
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