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;; (server:have-sync-lock?))
;; (else #f))))
;; moving this here as it needs access to db and cannot be in common.
;;
(define (server:get-bruteforce-syncer dbstruct #!key (fork-to-background #f) (persist-until-sync #f))
(debug:print "WARNING: bruteforce-syncer is called but has been disabled!")
(lambda ()
(debug:print "WARNING: bruteforce-syncer is called but has been disabled!"))
(let* ((sqlite-exe (or (get-environment-variable "MT_SQLITE3_EXE"))) ;; defined in cfg.sh
#;(let* ((sqlite-exe (or (get-environment-variable "MT_SQLITE3_EXE"))) ;; defined in cfg.sh
(sync-log (or (args:get-arg "-sync-log") (conc *toppath* "/logs/sync-" (current-process-id) "-" (get-host-name) ".log")))
(tmp-area (common:get-db-tmp-area))
(tmp-db (conc tmp-area "/megatest.db"))
(staging-file (conc *toppath* "/.megatest.db"))
(mtdbfile (conc *toppath* "/megatest.db"))
(lockfile (common:get-sync-lock-filepath))
(sync-cmd-core (conc sqlite-exe" " tmp-db " .dump | "sqlite-exe" " staging-file "&>"sync-log))
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))
(BB> "End do-a-sync with fork-to-background="fork-to-background" persist-until-sync="persist-until-sync" and result="finalres)
finalres)
) ;; end lambda
))
do-a-sync))
(define (server:writable-watchdog-bruteforce dbstruct)
(thread-sleep! 1) ;; delay for startup
(let* ((do-a-sync (server:get-bruteforce-syncer dbstruct))
(final-sync (server:get-bruteforce-syncer dbstruct fork-to-background: #t persist-until-sync: #t)))
(when (and (not (args:get-arg "-sync-to-megatest.db")) ;; conditions under which we do not run the sync
(args:get-arg "-server"))
(let loop ()
(do-a-sync)
(if (not *time-to-exit*) (loop))) ;; keep going unless time to exit
;; time to exit, close the no-sync db here
(final-sync)
(if (common:low-noise-print 30)
(debug:print-info 0 *default-log-port* "Exiting watchdog timer, *time-to-exit* = " *time-to-exit*" pid="(current-process-id)
)))))
(define (server:writable-watchdog-deltasync dbstruct)
(thread-sleep! 0.05) ;; delay for startup
(let ((legacy-sync (common:run-sync?))
(sync-stale-seconds (configf:lookup-number *configdat* "server" "sync-stale-seconds" default: 300))
(debug-mode (debug:debug-mode 1))
(last-time (current-seconds))
(no-sync-db (db:open-no-sync-db))
(stmt-cache (dbr:dbstruct-stmt-cache dbstruct))
(sync-duration 0) ;; run time of the sync in milliseconds
)
(set! *no-sync-db* no-sync-db) ;; make the no sync db available to api calls
(debug:print-info 2 *default-log-port* "Periodic sync thread started.")
(debug:print-info 3 *default-log-port* "watchdog starting. legacy-sync is " legacy-sync" pid="(current-process-id) );; " this-wd-num="this-wd-num)
(if (and legacy-sync (not *time-to-exit*))
(let* (;;(dbstruct (db:setup))
(mtdb (dbr:dbstruct-mtdb dbstruct))
(mtpath (db:dbdat-get-path mtdb))
(tmp-area (common:get-db-tmp-area))
(start-file (conc tmp-area "/.start-sync"))
(end-file (conc tmp-area "/.end-sync")))
(debug:print-info 0 *default-log-port* "Server running, periodic sync started.")
(let loop ()
;; sync for filesystem local db writes
;;
(mutex-lock! *db-multi-sync-mutex*)
(let* ((need-sync (>= *db-last-access* *db-last-sync*)) ;; no sync since last write
(sync-in-progress *db-sync-in-progress*)
(min-intersync-delay (configf:lookup-number *configdat* "server" "minimum-intersync-delay" default: 5))
(should-sync (and (not *time-to-exit*)
(> (- (current-seconds) *db-last-sync*) min-intersync-delay))) ;; sync every five seconds minimum, deprecated logic, can probably be removed
(start-time (current-seconds))
(cpu-load-adj (alist-ref 'adj-proc-load (common:get-normalized-cpu-load #f)))
(mt-mod-time (file-modification-time mtpath))
(last-sync-start (if (common:file-exists? start-file)
(file-modification-time start-file)
0))
(last-sync-end (if (common:file-exists? end-file)
(file-modification-time end-file)
10))
(sync-period (+ 3 (* cpu-load-adj 30))) ;; as adjusted load increases increase the sync period
(recently-synced (and (< (- start-time mt-mod-time) sync-period) ;; not useful if sync didn't modify megatest.db!
(< mt-mod-time last-sync-start)))
(sync-done (<= last-sync-start last-sync-end))
(sync-stale (> start-time (+ last-sync-start sync-stale-seconds)))
(will-sync (and (not *time-to-exit*) ;; do not start a sync if we are in the process of exiting
(or need-sync should-sync)
(or sync-done sync-stale)
(not sync-in-progress)
(not recently-synced))))
(debug:print-info 13 *default-log-port* "WD writable-watchdog top of loop. need-sync="need-sync" sync-in-progress=" sync-in-progress
" should-sync="should-sync" start-time="start-time" mt-mod-time="mt-mod-time" recently-synced="recently-synced" will-sync="will-sync
" sync-done=" sync-done " sync-period=" sync-period)
(if (and (> sync-period 5)
(common:low-noise-print 30 "sync-period"))
(debug:print-info 0 *default-log-port* "Increased sync period due to long sync times, sync took: " sync-period " seconds."))
;; (if recently-synced (debug:print-info 0 *default-log-port* "Skipping sync due to recently-synced flag=" recently-synced))
;; (debug:print-info 0 *default-log-port* "need-sync: " need-sync " sync-in-progress: " sync-in-progress " should-sync: " should-sync " will-sync: " will-sync)
(if will-sync (set! *db-sync-in-progress* #t))
(mutex-unlock! *db-multi-sync-mutex*)
(if will-sync
(let (;; (max-sync-duration (configf:lookup-number *configdat* "server" "max-sync-duration")) ;; KEEPING THIS AVAILABLE BUT SHOULD NOT USE, I'M PRETTY SURE IT DOES NOT WORK!
(sync-start (current-milliseconds)))
(with-output-to-file start-file (lambda ()(print (current-process-id))))
;; put lock here
;; (if (or (not max-sync-duration)
;; (< sync-duration max-sync-duration)) ;; NOTE: db:sync-to-megatest.db keeps track of time of last sync and syncs incrementally
(let ((res (db:sync-to-megatest.db dbstruct no-sync-db: no-sync-db))) ;; did we sync any data? If so need to set the db touched flag to keep the server alive
(set! sync-duration (- (current-milliseconds) sync-start))
(if (> res 0) ;; some records were transferred, keep the db alive
(begin
(mutex-lock! *heartbeat-mutex*)
(set! *db-last-access* (current-seconds))
(mutex-unlock! *heartbeat-mutex*)
(debug:print-info 0 *default-log-port* "sync called, " res " records transferred."))
(debug:print-info 2 *default-log-port* "sync called but zero records transferred")))))
;; ;; TODO: factor this next routine out into a function
;; (with-input-from-pipe ;; this should not block other threads but need to verify this
;; (conc "megatest -sync-to-megatest.db -m testsuite:" (common:get-area-name) ":" *toppath*)
;; (lambda ()
;; (let loop ((inl (read-line))
;; (res #f))
;; (if (eof-object? inl)
;; (begin
;; (set! sync-duration (- (current-milliseconds) sync-start))
;; (cond
;; ((not res)
;; (debug:print 0 *default-log-port* "ERROR: sync from /tmp db to megatest.db appears to have failed. Recommended that you stop your runs and run \"megatest -cleanup-db\""))
;; ((> res 0)
;; (mutex-lock! *heartbeat-mutex*)
;; (set! *db-last-access* (current-seconds))
;; (mutex-unlock! *heartbeat-mutex*))))
;; (let ((num-synced (let ((matches (string-match "^Synced (\\d+).*$" inl)))
;; (if matches
;; (string->number (cadr matches))
;; #f))))
;; (loop (read-line)
;; (or num-synced res))))))))))
(if will-sync
(begin
(mutex-lock! *db-multi-sync-mutex*)
(set! *db-sync-in-progress* #f)
(set! *db-last-sync* start-time)
(with-output-to-file end-file (lambda ()(print (current-process-id))))
;; release lock here
(mutex-unlock! *db-multi-sync-mutex*)))
(if (and debug-mode
(> (- start-time last-time) 60))
(begin
(set! last-time start-time)
(debug:print-info 4 *default-log-port* "timestamp -> " (seconds->time-string (current-seconds)) ", time since start -> " (seconds->hr-min-sec (- (current-seconds) *time-zero*))))))
;; keep going unless time to exit
;;
(if (not *time-to-exit*)
(let delay-loop ((count 0))
;;(debug:print-info 13 *default-log-port* "delay-loop top; count="count" pid="(current-process-id)" this-wd-num="this-wd-num" *time-to-exit*="*time-to-exit*)
(if (and (not *time-to-exit*)
(< count 6)) ;; was 11, changing to 4.
(begin
(thread-sleep! 1)
(delay-loop (+ count 1))))
(if (not *time-to-exit*) (loop))))
;; time to exit, close the no-sync db here
(db:no-sync-close-db no-sync-db stmt-cache)
(if (common:low-noise-print 30)
(debug:print-info 0 *default-log-port* "Exiting watchdog timer, *time-to-exit* = " *time-to-exit*" pid="(current-process-id) ))))))) ;;" this-wd-num="this-wd-num)))))))
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