Megatest

;;          logs directory you wish to log-rotate.
;;
(define (common:rotate-logs)
  (let* ((all-files (make-hash-table))
	 (stats     (make-hash-table))
	 (inc-stat  (lambda (key)
		      (hash-table-set! stats key (+ (hash-table-ref/default stats key 0) 1))))
	(max-allowed (string->number (or (configf:lookup *configdat* "setup" "max-logfiles") "600")))) ;; name -> age
    (if (not (directory-exists? "logs"))(create-directory "logs"))
    (directory-fold 
     (lambda (file rem)
       (handle-exceptions
	exn
	(begin
	  (debug:print-info 2 *default-log-port* "unable to rotate log " file ", probably handled by another process, this is safe to ignore. exn=" exn)

    (if dat
	dat
	""))))

(define (common:alist-ref/default key alist default)
  (or (alist-ref key alist) default))

;; moved into commonmod
;;
;; (define (common:low-noise-print waitval . keys)
;;   (let* ((key      (string-intersperse (map conc keys) "-" ))
;; 	 (lasttime (hash-table-ref/default *common:denoise* key 0))
;; 	 (currtime (current-seconds)))
;;     (if (> (- currtime lasttime) waitval)
;; 	(begin
;; 	  (hash-table-set! *common:denoise* key currtime)
;; 	  #t)
;; 	#f)))

(define (common:get-megatest-exe)
  (or (getenv "MT_MEGATEST") "megatest"))

(define (common:read-encoded-string instr)
  (handle-exceptions
   exn

;; 			  megatest-db
;; 			  (conc cache-dir "/" fname)
;; 			  use-last-update: #t)))
;; 	  (thread-start! th1)
;; 	  (apply proc cache-db params)
;; 	  ))))




(define (db:all-db-sync dbstruct)
  (let* ((dbdat (db:open-db dbstruct #f db:initialize-main-db))
	 (data-synced       0) ;; count of changed records
    (tmp-area       (common:get-db-tmp-area))
    (dbfiles        (glob (conc tmp-area"/.megatest/*.db")))
    (sync-durations (make-hash-table))
    (no-sync-db        (db:open-no-sync-db)))

       )
     )
     dbfiles
    )
    data-synced
  )
)



;; Sync all changed db's
;;
(define (db:tmp->megatest.db-sync dbstruct run-id last-update)
  (let* ((subdbs (hash-table-values (dbr:dbstruct-subdbs dbstruct)))
	 (res    '()))
    (for-each

(define dbfile:db-init-proc (make-parameter #f))

;; (db:with-db dbstruct run-id sqlite3:exec "select blah fgrom blaz;")
;; r/w is a flag to indicate if the db is modified by this query #t = yes, #f = no
;;
(define (db:with-db dbstruct run-id r/w proc . params)
  (assert dbstruct "FATAL: db:with-db called with dbstruct "#f)
  (let* ((use-mutex (> *api-process-request-count* 25)) ;; risk of db corruption
	 (have-struct (dbr:dbstruct? dbstruct))
         (dbdat     (if have-struct                ;; this stuff just allows us to call with a db handle directly
			(db:open-db dbstruct run-id (dbfile:db-init-proc)) ;; (dbfile:get-subdb dbstruct run-id)
			#f))
	 (db        (if have-struct                ;; this stuff just allows us to call with a db handle directly
			(dbr:dbdat-dbh dbdat)
			dbstruct))
	 (fname     (if dbdat
			(dbr:dbdat-dbfile dbdat)
			"nofilenameavailable"))
	 (jfile     (conc fname"-journal"))
	 #;(subdb     (if have-struct
			(dbfile:get-subdb dbstruct run-id)
			#f))
	 ) ;; was 25
    (assert (sqlite3:database? db) "FATAL: db:with-db, db is not a database, db="db", fname="fname)
    (if (file-exists? jfile)
	(begin
	  (dbfile:print-err "INFO: "jfile" exists, delaying to reduce database load")
	  (thread-sleep! 0.2)))
    (if (and use-mutex
	     (common:low-noise-print 120 "over-50-parallel-api-requests"))
	(dbfile:print-err *api-process-request-count* " parallel api requests being processed in process "

(import canvas-draw-iup)
(use regex typed-records matchable)

(declare (unit dcommon))

(declare (uses gutils))
(declare (uses db))
(declare (uses commonmod))

(import commonmod)
;; (declare (uses synchash))

(include "megatest-version.scm")
(include "common_records.scm")
(include "db_records.scm")
(include "key_records.scm")
(include "run_records.scm")

	     (max-row      (if (null? row-indices) 1 (common:max (map cadr row-indices))))
	     (max-col      (if (null? col-indices) 1 
			       (common:max (map cadr col-indices))))
	     (max-visible  (max (- (dboard:tabdat-num-tests tabdat) 15) 3))
	     (max-col-vis  (if (> max-col 10) 10 max-col))
	     (numrows      1)
	     (numcols      1))
	(if (common:low-noise-print 60 "runs-stats-update-clear")
	    (iup:attribute-set! stats-matrix "CLEARVALUE" "CONTENTS"))
	(iup:attribute-set! stats-matrix "NUMCOL" max-col )
	(iup:attribute-set! stats-matrix "NUMLIN" (if (< max-row max-visible) max-visible max-row)) ;; min of 20
	(iup:attribute-set! stats-matrix "NUMCOL_VISIBLE" max-col-vis)
	(iup:attribute-set! stats-matrix "NUMLIN_VISIBLE" (if (> max-row max-visible) max-visible max-row))
	;;(print "row-indices: " row-indices " col-indices: " col-indices)
	;; Row labels
	(for-each (lambda (ind)

	    (set! server-going #t)
	    (debug:print 0 *default-log-port* "SERVER: running, megatest version: " (common:get-full-version))) ;; NOTE: the server is NOT yet marked as running in the log. We do that in the keep-running routine.
	  (if (and no-sync-db
		   (common:low-noise-print 10 "sync-all")) ;; cheesy way to reduce frequency of running sync :)
              (begin
		(if (common:low-noise-print 120 "sync-all-print")
                    (debug:print 0 *default-log-port* "keep-running calling db:all-db-sync at " (time->string (seconds->local-time) "%H:%M:%S")))
		(db:all-db-sync *dbstruct-dbs*)
		(if (common:low-noise-print 1800 "sync-back") ;; every half hour do a reverse sync
		    (let* ((lockfile (conc *toppath*"/.megatest/syncback.lock"))
			   (locked   (common:simple-file-lock lockfile)))
		      (if locked
			  (begin
			    (db:multi-db-sync
			     *dbstruct-dbs*
			     'dejunk
			     'adj-testids
			     'old2new)
			    (common:simple-file-release-lock lockfile)))))
		)))
      
      ;; when things go wrong we don't want to be doing the various queries too often
      ;; so we strive to run this stuff only every four seconds or so.
      (let* ((sync-time (- (current-milliseconds) start-time))
	    (rem-time  (quotient (- 4000 sync-time) 1000)))
	(if (and (<= rem-time 4)
		 (>  rem-time 0))

		  (current-seconds)))
          (if (common:low-noise-print 120 "server continuing")
              (debug:print-info 0 *default-log-port* "Server continuing, seconds since last db access: " (- (current-seconds) last-access))
	      (let ((curr-time (current-seconds)))
		(handle-exceptions
		    exn
		    (debug:print 0 *default-log-port* "ERROR: Failed to change timestamp on info file " servinfofile ". Are you out of space on that disk? exn=" exn)
		    (if (and ;; (< (- (current-seconds) server-start-time) 600) ;; run for ten minutes for experiment, 3600 thereafter
			     (not *server-overloaded*)
			     (file-exists? servinfofile))
			(change-file-times servinfofile curr-time curr-time)))
		(if (or (common:low-noise-print 120 "start new server")
			(> *api-process-request-count* 50)) ;; if this server is kind of busy start up another
		    (begin
		      (debug:print-info 0 *default-log-port* "Server is busy, parallel-api-count "*api-process-request-count*", start another if possible...")

    (exit)))

;; all routes though here end in exit ...
;;
;; start_server? 
;;
(define (http-transport:launch)
  ;; check the .servinfo directory, are there other servers running on this
  ;; or another host?
  (let* ((server-start-is-ok  (server:minimal-check *toppath*)))















    (if (not server-start-is-ok)
	(begin






	  (debug:print 0 *default-log-port* "ERROR: server start not ok, exiting now.")
	  (exit 1))))
    
  ;; check that a server start is in progress, pause or exit if so


  (let* ((th2 (make-thread (lambda ()
                             (debug:print-info 0 *default-log-port* "Server run thread started")
                             (http-transport:run 
                              (if (args:get-arg "-server")
                                  (args:get-arg "-server")
                                  "-")
                              )) "Server run"))
         (th3 (make-thread (lambda ()
                             (debug:print-info 0 *default-log-port* "Server monitor thread started")
                             (http-transport:keep-running)
                             "Keep running"))))
    (thread-start! th2)
    (thread-sleep! 0.25) ;; give the server time to settle before starting the keep-running monitor.
    (thread-start! th3)
    (set! *didsomething* #t)
    (thread-join! th2)
    (exit)))

;; (define (http-transport:server-signal-handler signum)
;;   (signal-mask! signum)
;;   (handle-exceptions
;;    exn
;;    (debug:print 0 *default-log-port* " ... exiting ...")
;;    (let ((th1 (make-thread (lambda ()

;;     along with Megatest.  If not, see <http://www.gnu.org/licenses/>.

;; Always use two or four digit decimal
;; 1.01, 1.02...1.10,1.11,1.1101 ... 1.99,2.00..

;; (declare (unit megatest-version))

(define megatest-version 1.8002)

;; Start the server - can be done in conjunction with -runall or -runtests (one day...)
;;   we start the server if not running else start the client thread
;;======================================================================

;; Server? Start up here.
;;
(if (args:get-arg "-server")
    (let ((tl        (launch:setup)))

      ;; (server:launch 0 'http)
      (http-transport:launch)
      (set! *didsomething* #t)))

;; The adjutant is a bit different, it does NOT run (launch:setup) as it is not necessarily tied to
;; a specific Megatest area. Detail are being hashed out and this may change.
;;
(if (args:get-arg "-adjutant")
    (begin

;;======================================================================
;; S E R V E R
;;======================================================================

;; Call this to start the actual server
;;












;;======================================================================
;; S E R V E R   U T I L I T I E S 
;;======================================================================

;; Get the transport
(define (server:get-transport)
  (if *transport-type*

;; Given an area path,  start a server process    ### NOTE ### > file 2>&1 
;; if the target-host is set 
;; try running on that host
;;   incidental: rotate logs in logs/ dir.
;;
(define  (server:run areapath) ;; areapath is *toppath* for a given testsuite area







  (let* ((testsuite   (common:get-testsuite-name))
	 (logfile     (conc areapath "/logs/server.log")) ;; -" curr-pid "-" target-host ".log"))
	 (profile-mode (or (configf:lookup *configdat* "misc" "profilesw")
			   ""))
	 (cmdln (conc (common:get-megatest-exe)
		      " -server - ";; (or target-host "-")
		      (if (equal? (configf:lookup *configdat* "server" "daemonize") "yes")
			  " -daemonize "

		  (hash-table-set! res hostport serverdat)
		  (debug:print-info 0 *default-log-port* "bad server info for "f": "serverdat)))
	     (else
	      (debug:print-info 0 *default-log-port* "bad server info for "f": "serverdat)))))
       allfiles)
      res)))

;; check the .servinfo directory, are there other servers running on this
;; or another host?
;;
;; returns #t => ok to start another server
;;         #f => not ok to start another server
;;
(define (server:minimal-check areapath)
  (server:clean-up-old areapath)
  (let* ((srvdir      (conc areapath"/.servinfo"))
	 (servrs      (glob (conc srvdir"/*")))
	 (thishostip  (server:get-best-guess-address (get-host-name)))
	 (thisservrs  (glob (conc srvdir"/"thishostip":*")))
	 (homehostinf (server:choose-server areapath 'homehost))
	 (havehome    (car homehostinf))
	 (wearehome   (cdr homehostinf)))
    (debug:print-info 0 *default-log-port* thishostip", have homehost: "havehome", we are homehost: "wearehome
		      ", numservers: "(length thisservrs))
    (cond
     ((not havehome) #t) ;; no homehost yet, go for it
     ((and havehome wearehome (< (length thisservrs) 20)) #t) ;; we are home and less than 20 servers, ok to start another
     ((and havehome (not wearehome)) #f)     ;; we are not the home host
     ((and havehome wearehome (>= (length thisservrs) 20)) #f) ;; have enough running
     (else
      (debug:print 0 *default-log-port* "WARNING: Unrecognised scenario, servrs="servrs", thishostip="thishostip", thisservrs="thisservrs)
      #t))))
	 
;; oldest server alive determines host then choose random of youngest
;; five servers on that host
;;
;; mode:
;;   best - get best server (random of newest five)
;;   home - get home host based on oldest server
;;   info - print info
(define (server:choose-server areapath #!optional (mode 'best))
  ;; age is current-starttime
  ;; find oldest alive
  ;;   1. sort by age ascending and ping until good
  ;; find alive rand from youngest
  ;;   1. sort by age descending
  ;;   2. take five
  ;;   3. check alive, discard if not and repeat
  ;; first we clean up old server files
  (server:clean-up-old areapath)
  (let* ((serversdat  (server:get-servers-info areapath))
	 (servkeys    (hash-table-keys serversdat))
	 (by-time-asc (if (not (null? servkeys)) ;; NOTE: Oldest is last
			  (sort servkeys ;; list of "host:port"
				(lambda (a b)
				  (>= (list-ref (hash-table-ref serversdat a) 2)
				      (list-ref (hash-table-ref serversdat b) 2))))

	     #f)))
	(begin
	  (server:run areapath)
	  (thread-sleep! 3)
	  (case mode
	    ((homehost) (cons #f #f))
	    (else	#f))))))

(define (server:clean-up-old areapath)
  ;; any server file that has not been touched in ten minutes is effectively dead
  (let* ((sfiles (glob (conc areapath"/.servinfo/*"))))
    (for-each
     (lambda (sfile)
       (let* ((modtime (handle-exceptions
			   exn
			 (begin
			   (debug:print 0 *default-log-port* "WARNING: failed to get modification file for "sfile)
			   (current-seconds))
			 (file-modification-time sfile))))
	 (if (and (number? modtime)
		  (> (- (current-seconds) modtime)
		     600))
	     (begin
	       (debug:print 0 *default-log-port* "WARNING: found old server info file "sfile", removing it.")
	       (handle-exceptions
		   exn
		 (debug:print 0 *default-log-port* "WARNING: failed to delete old server info file "sfile)
		 (delete-file sfile))))))
     sfiles)))

;; would like to eventually get rid of this
;;
(define (common:on-homehost?)
  (server:choose-server *toppath* 'home?))

;; kind start up of server, wait before allowing another server for a given