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(define (tasks:hostinfo-get-pid vec) (vector-ref vec 5))
(define (tasks:hostinfo-get-hostname vec) (vector-ref vec 6))
(define (tasks:server-lock-slot mdb run-id)
(let ((res '())
(best #f))
(tasks:server-clean-out-old-records-for-run-id mdb run-id)
(tasks:server-set-available mdb run-id)
(sqlite3:execute mdb "DELETE FROM servers WHERE state='running' AND (strftime('%s','now') - heartbeat) > 10 AND run_id=?;" run-id)
)
(define (tasks:server-set-state! mdb server-id state)
(sqlite3:execute mdb "UPDATE servers SET state=? WHERE id=?;" state server-id))
(define (tasks:server-delete-record! mdb server-id)
(sqlite3:execute mdb "DELETE FROM servers WHERE id=?;" server-id))
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(define (tasks:hostinfo-get-pid vec) (vector-ref vec 5))
(define (tasks:hostinfo-get-hostname vec) (vector-ref vec 6))
(define (tasks:server-lock-slot mdb run-id)
(let ((res '())
(best #f))
(tasks:server-clean-out-old-records-for-run-id mdb run-id)
(if (tasks:less-than-two-available mdb run-id)
(tasks:server-set-available mdb run-id))
(thread-sleep! 2) ;; Try removing this. It may not be needed.
(tasks:server-am-i-the-server? mdb run-id)))
;; register that this server may come online (first to register goes though with the process)
(define (tasks:server-set-available mdb run-id)
(sqlite3:execute
mdb
"INSERT INTO servers (pid,hostname,port,pubport,start_time, priority,state,mt_version,heartbeat, interface,transport,run_id)
VALUES(?, ?, ?, ?, strftime('%s','now'), ?, ?, ?,-1,?, ?, ?);"
(current-process-id) ;; pid
(get-host-name) ;; hostname
-1 ;; port
-1 ;; pubport
(random 1000) ;; priority (used a tiebreaker on get-available)
"available" ;; state
(common:version-signature) ;; mt_version
-1 ;; interface
"http" ;; transport
run-id
))
(define (tasks:less-than-two-available mdb run-id)
(let ((res 0))
(sqlite3:for-each-row
(lambda (num-in-queue)
(set! res num-in-queue))
mdb
"SELECT count(id) FROM servers WHERE run_id=?;"
run-id)
res))
(define (tasks:server-clean-out-old-records-for-run-id mdb run-id)
(sqlite3:execute mdb "DELETE FROM servers WHERE state in ('available','shutting-down') AND (strftime('%s','now') - start_time) > 30 AND run_id=?;" run-id)
(if (server:check-if-running run-id)
(sqlite3:execute mdb "DELETE FROM servers WHERE run_id=?;" run-id)))
(define (tasks:server-set-state! mdb server-id state)
(sqlite3:execute mdb "UPDATE servers SET state=? WHERE id=?;" state server-id))
(define (tasks:server-delete-record! mdb server-id)
(sqlite3:execute mdb "DELETE FROM servers WHERE id=?;" server-id))
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(lambda (a . b)
(set! res (cons (apply vector a b) res)))
mdb
(conc "SELECT " selstr " FROM servers WHERE run_id=? ORDER BY start_time DESC;")
run-id)
(vector header res)))
(define (tasks:server-update-heartbeat mdb server-id)
(debug:print-info 1 "Heart beat update of server id=" server-id)
(handle-exceptions
exn
(begin
(debug:print 0 "WARNING: probable timeout on monitor.db access")
(thread-sleep! 1)
(tasks:server-update-heartbeat mdb server-id))
(sqlite3:execute mdb "UPDATE servers SET heartbeat=strftime('%s','now') WHERE id=?;" server-id)))
;; alive servers keep the heartbeat field upto date with seconds every 6 or so seconds
(define (tasks:server-alive? mdb server-id #!key (iface #f)(hostname #f)(port #f)(pid #f))
(let* ((server-id (if server-id
server-id
(tasks:server-get-server-id mdb hostname iface port pid)))
(heartbeat-delta 99e9))
(sqlite3:for-each-row
(lambda (delta)
(set! heartbeat-delta delta))
mdb "SELECT strftime('%s','now')-heartbeat FROM servers WHERE id=?;" server-id)
(< heartbeat-delta 10)))
;; (define (tasks:get-all-servers mdb)
;; (let ((res '()))
;; (sqlite3:for-each-row
;; (lambda (id interface port pubport transport pid hostname)
;; (set! res (cons (vector id interface port pubport transport pid hostname) res)))
;; mdb
;; "SELECT id,interface,port,pubport,transport,pid,hostname FROM servers
;; WHERE strftime('%s','now')-heartbeat < 10
;; AND mt_version=?
;; ORDER BY start_time DESC;" (common:version-signature))
;; res))
(define (tasks:kill-server status hostname port pid transport)
(debug:print-info 1 "Removing defunct server record for " hostname ":" port)
(if port
(open-run-close tasks:server-deregister tasks:open-db hostname port: port)
(open-run-close tasks:server-deregister tasks:open-db hostname pid: pid))
(if status ;; #t means alive
(begin
(if (equal? hostname (get-host-name))
(handle-exceptions
exn
(debug:print-info 0 "server may or may not be dead, check for megatest -server running as pid " pid "\n"
" EXCEPTION: " ((condition-property-accessor 'exn 'message) exn))
(debug:print 1 "Sending signal/term to " pid " on " hostname)
(process-signal pid signal/term)
(thread-sleep! 5) ;; give it five seconds to die peacefully then do a brutal kill
;;(process-signal pid signal/kill)
) ;; local machine, send sig term
(begin
;;(debug:print-info 1 "Stopping remote servers not yet supported."))))
(debug:print-info 1 "Telling alive server on " hostname ":" port " to commit servercide")
(let ((serverdat (list hostname port)))
(case (if (string? transport) (string->symbol transport) transport)
((http)(http-transport:client-connect hostname port))
(else (debug:print "ERROR: remote stopping servers of type " transport " not supported yet")))
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(lambda (a . b)
(set! res (cons (apply vector a b) res)))
mdb
(conc "SELECT " selstr " FROM servers WHERE run_id=? ORDER BY start_time DESC;")
run-id)
(vector header res)))
(define (tasks:get-server mdb run-id)
(let ((res #f)
(best #f))
(sqlite3:for-each-row
(lambda (id interface port pubport transport pid hostname)
(set! res (vector id interface port pubport transport pid hostname)))
mdb
;; removed:
;; strftime('%s','now')-heartbeat < 10 AND
"SELECT id,interface,port,pubport,transport,pid,hostname FROM servers
WHERE mt_version=? AND run_id=? AND state='running'
ORDER BY start_time DESC LIMIT 1;" (common:version-signature) run-id)
res))
(define (tasks:get-all-servers mdb)
(let ((res '()))
(sqlite3:for-each-row
(lambda (id pid hostname interface port pubport start-time priority state mt-version last-update transport)
(set! res (cons (vector id pid hostname interface port pubport start-time priority state mt-version last-update transport) res)))
mdb
"SELECT id,pid,hostname,interface,port,pubport,start_time,priority,state,mt_version,strftime('%s','now')-heartbeat AS last_update,transport FROM servers ORDER BY start_time DESC;")
res))
(define (tasks:kill-server status hostname port pid)
(debug:print-info 1 "Removing defunct server record for " hostname ":" port)
(if port
(open-run-close tasks:server-deregister tasks:open-db hostname port: port)
(open-run-close tasks:server-deregister tasks:open-db hostname pid: pid))
(if status ;; #t means alive
(begin
(if (equal? hostname (get-host-name))
(handle-exceptions
exn
(debug:print-info 0 "server may or may not be dead, check for megatest -server running as pid " pid "\n"
" EXCEPTION: " ((condition-property-accessor 'exn 'message) exn))
(debug:print 1 "Sending signal/term to " pid " on " hostname)
(process-signal pid signal/term)
(thread-sleep! 5) ;; give it five seconds to die peacefully then do a brutal kill
;;(process-signal pid signal/kill)
) ;; local machine, send sig term
(begin
;;(debug:print-info 1 "Stopping remote servers not yet supported."))))
(debug:print-info 1 "Telling alive server on " hostname ":" port " to commit servercide")
(let ((serverdat (list hostname port)))
(http-transport:client-connect hostname port)
(cdb:kill-server serverdat pid))))) ;; remote machine, try telling server to commit suicide
(begin
(if status
(if (equal? hostname (get-host-name))
(begin
(debug:print-info 1 "Sending signal/term to " pid " on " hostname)
(process-signal pid signal/term) ;; local machine, send sig term
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