Megatest

;; These are called by the server on recipt of /api calls
;;    - keep it simple, only return the actual result of the call, i.e. no meta info here
;;
;;    - returns #( flag result )
;;
(define (api:execute-requests dbstruct dat)
  (db:open-no-sync-db) ;; sets *no-sync-db*
  (handle-exceptions
   exn
   (let ((call-chain (get-call-chain)))
     (debug:print 0 *default-log-port* "WARNING: api:execute-requests received an exception from peer, dat=" dat ", exn=" exn)
     (print-call-chain (current-error-port))
     (debug:print 0 *default-log-port* " message: "  ((condition-property-accessor 'exn 'message) exn))       
     (vector #f (vector exn call-chain dat))) ;; return some stuff for debug if an exception happens

	 (use-mutex (> *api-process-request-count* 25))) ;; was 25
    (if (and use-mutex
	     (common:low-noise-print 120 "over-50-parallel-api-requests"))
	(debug:print-info 0 *default-log-port* *api-process-request-count* " parallel api requests being processed in process " (current-process-id) ", throttling access"))
    (if (common:low-noise-print 600 (conc "parallel-api-requests" *max-api-process-requests*))
	(debug:print-info 2 *default-log-port* "Parallel api request count: " *api-process-request-count* " max parallel requests: " *max-api-process-requests*))
    (condition-case
	(begin
	  (if use-mutex (mutex-lock! *db-with-db-mutex*))
	  (let ((res (apply proc dbdat db params)))
	    (if use-mutex (mutex-unlock! *db-with-db-mutex*))
	    ;; (if (vector? dbstruct)(db:done-with dbstruct run-id r/w))
	    (if dbdat (stack-push! (dbr:subdb-dbstack subdb) dbdat))
	    res))
      (exn (io-error)
	   (db:generic-error-printout exn "ERROR: i/o error with " fname ". Check permissions, disk space etc. and try again."))
      (exn (corrupt)
	   (db:generic-error-printout exn "ERROR: database " fname " is corrupt. Repair it to proceed."))
      (exn (busy)
	   (db:generic-error-printout exn "ERROR: database " fname
				      " is locked. Try copying to another location, remove original and copy back."))
      (exn (permission)(db:generic-error-printout exn "ERROR: database " fname " has some permissions problem."))
      (exn ()
	   (db:generic-error-printout exn "ERROR: Unknown error with database " fname " message: "
				      ((condition-property-accessor 'exn 'message) exn))))))
      

;; NB// #f => return dbdir only
;;      (was planned to be;  zeroth db with name=main.db)
;; 
;; If run-id is #f return to create and retrieve the path where the db will live.
;;

  (db:with-db dbstruct #f #t 
	      (lambda (dbdat db)
		(sqlite3:execute db "DELETE FROM metadat WHERE var=?;" var))))

;;======================================================================
;; no-sync.db - small bits of data to be shared between servers
;;======================================================================

(define (db:no-sync-db db-in)
  (if db-in
      db-in
      (if *no-sync-db*
	  *no-sync-db*
	  (begin
	    (mutex-lock! *db-access-mutex*)
	    (let ((dbpath (common:get-db-tmp-area))
		  (db     (dbfile:open-no-sync-db dbpath)))
	      (set! *no-sync-db* db)
	      (mutex-unlock! *db-access-mutex*)
	      db)))))

(define (with-no-sync-db proc)
  (let* ((db  (db:no-sync-db *no-sync-db*)))
    (proc db)))

(define (db:open-no-sync-db)
  (dbfile:open-no-sync-db (db:dbfile-path)))

(define (db:no-sync-close-db db stmt-cache)
  (db:safely-close-sqlite3-db db stmt-cache))

	 (dbfiles        (glob (conc tmp-area"/.db/*.db")))
	 (sync-durations (make-hash-table)))
    ;; (debug:print-info 0 *default-log-port* "lock-and-sync, dbfiles: "dbfiles)
    (for-each
     (lambda (file)
       (let* ((fname (conc (pathname-file file) ".db"))
	      (fulln (conc *toppath*"/.db/"fname))
	      (time1 (if (file-exists? file)
			 (file-modification-time file)
			 (begin
			   (debug:print-info 0 *default-log-port* "Sync - I do not see file "file)
			   1)))
	      (time2 (if (file-exists? fulln)
			 (file-modification-time fulln)
			 (begin
			   (debug:print-info 0 *default-log-port* "Sync - I do not see file "fulln)
			   0)))
	      (changed (> time1 time2))
	      (do-cp (cond
		      ((not (file-exists? fulln)) ;; shouldn't happen, but this might recover
		       (debug:print-info 0 *default-log-port* "File "fulln" not found! Copying "fname" to "fulln)
		       #t)
		      (changed ;; (and changed
		       ;; (> (- (current-seconds) time1) 3)) ;; if file is changed and three seconds have passed.

;; no-sync.db - small bits of data to be shared between servers
;;======================================================================

;; if we are not a server create a db handle. this is not finalized
;; so watch for problems. I'm still not clear if it is needed to manually
;; finalize sqlite3 dbs with the sqlite3 egg.
;;

(define (dbfile:cautious-open-database fname #!optional (tries-left 5))
  (let* ((retry (lambda ()
		  (thread-sleep! 0.5)
		  (if (> tries-left 0)
		      (dbfile:cautious-open-database fname (- tries-left 1))))))
    (condition-case
	(sqlite3:open-database fname)
      (exn (io-error)
	   (dbfile:print-err exn "ERROR: i/o error with " fname ". Check permissions, disk space etc. and try again.")
	   (retry))
      (exn (corrupt)
	   (dbfile:print-err exn "ERROR: database " fname " is corrupt. Repair it to proceed.")
	   (retry))
      (exn (busy)

	   (dbfile:print-err exn "ERROR: database " fname
			     " is locked. Try copying to another location, remove original and copy back.")
	   (retry))
      (exn (permission)(dbfile:print-err exn "ERROR: database " fname " has some permissions problem.")
	   (retry))
      (exn ()
	   (dbfile:print-err exn "ERROR: Unknown error with database " fname " message: "
			     ((condition-property-accessor 'exn 'message) exn))
	   (retry)))))


(define (dbfile:open-no-sync-db dbpath)
  (if (not (file-exists? dbpath))
      (create-directory dbpath #t))
  (let* ((dbname    (conc dbpath "/no-sync.db"))
	 (db-exists (file-exists? dbname))
	 (db        (dbfile:cautious-open-database dbname))) ;; (sqlite3:open-database dbname)))
    (sqlite3:set-busy-handler! db (sqlite3:make-busy-timeout 136000))
    (if (not db-exists)
	(begin
	  (sqlite3:execute db "PRAGMA synchronous = 0;")
	  (sqlite3:execute db "CREATE TABLE IF NOT EXISTS no_sync_metadat (var TEXT,val TEXT, CONSTRAINT no_sync_metadat_constraint UNIQUE (var));")
	  #;(sqlite3:execute db "PRAGMA journal_mode=WAL;")))
    db))

(define (db:no-sync-set db var val)
  (sqlite3:execute db "INSERT OR REPLACE INTO no_sync_metadat (var,val) VALUES (?,?);" var val))

(define (db:no-sync-del! db var)
  (sqlite3:execute db "DELETE FROM no_sync_metadat WHERE var=?;" var))

(define (db:no-sync-get/default db var default)
  (let ((res default))
    (sqlite3:for-each-row
     (lambda (val)
       (set! res val))
     db
     "SELECT val FROM no_sync_metadat WHERE var=?;"
     var)
    (if res
        (let ((newres (if (string? res)
			  (string->number res)
			  #f)))
          (if newres
              newres
              res))
        res)))

;; transaction protected lock aquisition
;; either:
;;    fails    returns  (#f . lock-creation-time)
;;    succeeds (returns (#t . lock-creation-time)
;; use (db:no-sync-del! db keyname) to release the lock
;;
(define (db:no-sync-get-lock db keyname)

  (sqlite3:with-transaction
   db
   (lambda ()
     (handle-exceptions
	 exn
	 (let ((lock-time (current-seconds)))
	   ;; (debug:print-info 2 *default-log-port* "db:no-sync-get-lock keyname=" keyname ", lock-time=" lock-time ", exn=" exn)
	   (sqlite3:execute db "INSERT INTO no_sync_metadat (var,val) VALUES(?,?);" keyname lock-time)
	   `(#t . ,lock-time))
       `(#f . ,(sqlite3:first-result db "SELECT val FROM no_sync_metadat WHERE var=?;" keyname))))))


;;======================================================================
;; file utils
;;======================================================================

;;======================================================================

;;
(define (http-transport:keep-running) 
  ;; if none running or if > 20 seconds since 
  ;; server last used then start shutdown
  ;; This thread waits for the server to come alive
  (debug:print-info 0 *default-log-port* "Starting the sync-back, keep alive thread in server")
  (let* ((sdat              #f)
	 (no-sync-db        (db:open-no-sync-db))
	 (tmp-area          (common:get-db-tmp-area))
	 (started-file      (conc tmp-area "/.server-started"))
	 (server-start-time (current-seconds))
	 (server-info (let loop ((start-time (current-seconds))
				 (changed    #t)
				 (last-sdat  "not this"))
                        (begin ;; let ((sdat #f))

      exn
      '()
      (sqlite3:first-row db "SELECT id,action,owner,state,target,name,testpatt,keylock,params WHERE
                               params LIKE ? AND state LIKE ? AND action LIKE ? AND testpatt LIKE ?;"
			 param-key state-patt action-patt test-patt)))))

(define (tasks:find-task-queue-records dbstruct target run-name test-patt state-patt action-patt)



  (db:with-db
   dbstruct
   #f #f
   (lambda (dbdat db)
     (let ((res '()))
       (sqlite3:for-each-row 
	(lambda (a . b)
	  (set! res (cons (cons a b) res)))
	db "SELECT id,action,owner,state,target,name,testpatt,keylock,params FROM tasks_queue 
           WHERE
              target = ? AND name = ? AND state LIKE ? AND action LIKE ? AND testpatt LIKE ?;"
	target run-name state-patt action-patt test-patt)
       res))))

;; kill any runner processes (i.e. processes handling -runtests) that match target/runname
;; 
;; do a remote call to get the task queue info but do the killing as self here.
;;
(define (tasks:kill-runner target run-name testpatt)
  (let ((records    (rmt:tasks-find-task-queue-records target run-name testpatt "running" "run-tests"))

cleanup :
	killall mtest dboard -v -9 || true
	rm -rf *.log *.bak NB* logs/* .meta .db /tmp/$(USER)/megatest_localdb/simplerun ../simpleruns/* lt