Megatest

      #f
      (let loop ((hed (car dirs))
		 (tal (cdr dirs)))
	(let ((res (or (and (directory? hed)
			    (file-write-access? hed)
			    hed)
		       (handle-exceptions
			exn
			#f
			   exn
			   (begin
			     (debug:print-info 0 *default-log-port* "could not create " hed ", this might cause problems down the road.")
			     #f)
			(create-directory hed #t)))))
	  (if (and (string? res)
		   (directory? res))
	      res
	      (if (null? tal)
		  #f
		  (loop (car tal)(cdr tal))))))))

          ((< (+ load (/ (random 250) 1000))         ;; add a random factor to keep from getting in a rut
              (+ best-load (/ (random 250) 1000))  )
           (set! best-load load)
           (set! best-host hostname)))))
     hosts)
    best-host))

(define (common:wait-for-cpuload maxload numcpus waitdelay #!key (count 1000) (msg #f)(remote-host #f))
(define (common:wait-for-cpuload maxload-in numcpus-in waitdelay #!key (count 1000) (msg #f)(remote-host #f))
  (let* ((loadavg (common:get-cpu-load remote-host))
	 (numcpus (if (< 1 numcpus-in) ;; not possible
		      (common:get-num-cpus remote-host)
		      numcpus-in))
	 (maxload (max maxload-in 0.5)) ;; so maxload must be greater than 0.5 for now BUG - FIXME?
	 (first   (car loadavg))
	 (next    (cadr loadavg))
	 (adjload (* maxload numcpus))
	 (adjload (* maxload (max 1 numcpus))) ;; possible bug where numcpus (or could be maxload) is zero, crude fallback is to at least use 1
	 (loadjmp (- first next)))
    (cond
     ((and (> first adjload)
	   (> count 0))
      (debug:print-info 0 *default-log-port* "waiting " waitdelay " seconds due to load " first " exceeding max of " adjload " " (if msg msg ""))
      (thread-sleep! waitdelay)
      (common:wait-for-cpuload maxload numcpus waitdelay count: (- count 1)))

minimt : minimt.scm db.scm setup.scm
	csc minimt.scm

clean :
	rm -rf runtest/*

;; pretend to be a simplified Megatest

(use sql-de-lite defstruct)

;; init the db - NOTE: takes a db NOT a dbconn
;;
(define (init-db db)
  (with-transaction
   db
   (lambda ()
     (for-each
      (lambda (qrystr)
	(exec (sql db qrystr)))
      '("CREATE TABLE IF NOT EXISTS runs 
           (id        INTEGER PRIMARY KEY,
            target    TEXT NOT NULL,
            run_name  TEXT NOT NULL,
            state     TEXT NOT NULL,
            status    TEXT NOT NULL,
            CONSTRAINT runs_constraint UNIQUE (run_name));"
	"CREATE TABLE IF NOT EXISTS tests
           (id        INTEGER PRIMARY KEY,
            run_id    INTEGER NOT NULL,
            test_name TEXT NOT NULL,
            state     TEXT NOT NULL,
            status    TEXT NOT NULL,
            start_time INTEGER DEFAULT (strftime('%s','now')),
            end_time   INTEGER DEFAULT -1,
            CONSTRAINT tests_constraint UNIQUE (run_id,test_name));"
	"CREATE TABLE IF NOT EXISTS steps
           (id        INTEGER PRIMARY KEY,
            test_id   INTEGER NOT NULL,
            step_name  TEXT NOT NULL,
            state     TEXT NOT NULL,
            status    TEXT NOT NULL,
            CONSTRAINT step_constraint UNIQUE (test_id,step_name));")))))

(defstruct dbconn-dat
  dbh       ;; the database handle
  writeable ;; do we have write access?
  path      ;; where the db lives
  name      ;; name of the db
  )

;; open the database, return a dbconn struct
(define (open-create-db path fname init)
  (let* ((fullname       (conc path "/" fname))
	 (already-exists (file-exists? fullname))
	 (write-access   (and (file-write-access? path)
			      (or (not already-exists)
				  (and already-exists
				       (file-write-access? fullname)))))
	 (db             (if (or already-exists write-access)
			     (open-database fullname)
			     (begin
			       (print "FATAL: No existing db and no write access thus cannot create " fullname)  ;; no db and no write access cannot proceed.
			       (exit 1))))
	 (dbconn         (make-dbconn-dat)))
    (set-busy-handler! db (busy-timeout 30000)) ;; set a busy timeout
    (if (and init write-access (not already-exists))
	(init db))
    (dbconn-dat-dbh-set!       dbconn db)
    (dbconn-dat-writeable-set! dbconn write-access)
    (dbconn-dat-path-set!      dbconn path)
    (dbconn-dat-name-set!      dbconn fname)
    dbconn))

(define-inline (get-db dbconn)
  (dbconn-dat-dbh dbconn))

;; RUNS

;; create a run
(define (create-run dbconn target run-name)
  (exec (sql (get-db dbconn) "INSERT INTO runs (run_name,target,state,status) VALUES (?,?,'NEW','na');")
	run-name target))

;; get a run id
(define (get-run-id dbconn target run-name)
  (first-column (query fetch (sql (get-db dbconn) "SELECT id FROM runs WHERE target=? AND run_name=?;")
		       target run-name)))

;; TESTS

(defstruct test-dat
  id
  run-id
  test-name
  state
  status)

;; create a test
(define (create-test dbconn run-id test-name)
  (exec (sql (get-db dbconn) "INSERT INTO tests (run_id,test_name,state,status) VALUES (?,?,'NOT_STARTED','na');")
	run-id test-name))

;; get a test id
(define (get-test-id dbconn run-id test-name)
  (first-column (query fetch (sql (get-db dbconn) "SELECT id FROM tests WHERE run_id=? AND test_name=?;")
		       run-id test-name)))

;; get the data for given test-id
(define (test-get-record dbconn test-id)
  (let* ((row (query fetch-row (sql (get-db dbconn) "SELECT id,run-id,test_name,state,status FROM tests WHERE test_id=?;")
		     test-id)))
    (make-test-dat
     id:        (list-ref row 0)
     run-id:    (list-ref row 1)
     test-name: (list-ref row 2)
     state:     (list-ref row 3)
     status:    (list-ref row 4))))
     
  
(define (test-set-state-status dbconn test-id new-state new-status)
  (exec (sql (get-db dbconn) "UPDATE tests SET state=?,status=?,end_time=? WHERE id=?;")
	new-state new-status (current-seconds) test-id))

;; STEPS

;; create a step
(define (create-step dbconn test-id step-name)
  (exec (sql (get-db dbconn) "INSERT INTO steps (test_id,step_name,state,status) VALUES (?,?,'NOT_STARTED','na');")
	test-id step-name))

;; get a step id
(define (get-step-id dbconn test-id step-name)
  (first-column (query fetch (sql (get-db dbconn) "SELECT id FROM steps WHERE test_id=? AND step_name=?;")
		       test-id step-name)))

(define (step-set-state-status dbconn step-id new-state new-status)
  (exec (sql (get-db dbconn) "UPDATE steps SET state=?,status=? WHERE id=?;")
	new-state new-status step-id))

(use posix)

(include "db.scm")

;; define following in setup.scm
;;    *remotehost*  => host for "tests"
;;    *homehost*    => host for servers
;;    *homepath*    => directory from which to run
;;    *numtests*    => how many tests to simulate for each run
;;    *numruns*     => how many runs to simulate
;;    
(include "setup.scm")

;; RUN A TEST
(define (run-test dbconn run-id test-name)
  (create-test dbconn run-id test-name)
  (let ((test-id (get-test-id dbconn run-id test-name)))
    (test-set-state-status dbconn test-id "LAUNCHED" "na")
    (thread-sleep! *launchdelay*)
    (test-set-state-status dbconn test-id "RUNNING" "na")
    (for-each
     (lambda (step-name)
       (create-step dbconn test-id step-name)
       (let ((step-id (get-step-id dbconn test-id step-name)))
	 (step-set-state-status dbconn step-id "START" -1)
	 (thread-sleep! *stepdelay*)
	 (step-set-state-status dbconn step-id "END" 0)
	 (print"   STEP: " step-name " done.")))
     '("step1" "step2" "step3" "step4" "step5" "step6" "step7" "step8" "step9"))
    (print "TEST: " test-name " done.")
    test-id))

;; RUN A RUN
(define (run-run dbconn target run-name num-tests)
  (create-run dbconn target run-name)
  (let ((run-id (get-run-id dbconn target run-name)))
    (let loop ((test-num 0))
      (system (conc "nbfake minimt runtest " run-id " test-" test-num))
      (if (< test-num num-tests)
	  (loop (+ test-num 1))))))

;; Do what is asked
(let ((args (cdr (argv))))
  (if (< (length args) 1)
      (print
       "Usage: minimt [options]" "
  runtest run-id testname
  runrun  target runname")
      (let ((cmd    (car args))
	    (dbconn (open-create-db *homepath* "mt.db" init-db)))
	(change-directory *homepath*)
	(case (string->symbol cmd)
	  ((runtest)
	   (let ((run-id    (string->number (cadr args)))
		 (test-name (caddr args)))
	     (print "Launching test " test-name " for run-id " run-id)
	     (run-test dbconn run-id test-name)))
	  ((runrun)
	   (let ((target   (cadr args))
		 (run-name (caddr args)))
	     (run-run dbconn target run-name *numtests*)))
	  (else
	   (print "Command: " cmd " not recognised. Run without params to see help.")))
	(close-database (dbconn-dat-dbh dbconn)))))

(define *remotehost* "orion")
(define *homehost*   "zeus")
(define *homepath*   "/nfs/phoebe/disk1/home/mfs_matt/data/megatest/minimt/runtest")
(define *numtests*   50)
(define *numruns*    50)
(define *testdelay*  0)
(define *rundelay*   0)
(define *launchdelay* 0)
(define *stepdelay*   0)

(use trace)
(trace-call-sites #t)
(trace
;;  open-create-db
 )

(define operation (string->symbol (car (command-line-arguments))))
(define param (cadr (command-line-arguments)))
(print "Operation: " operation ", param: " param)

;; have a pool of db's to pick from
(define *dbpool* '())
(define *pool-mutex* (make-mutex))
1

(define (get-db)
  (mutex-lock! *pool-mutex*)
  (if (null? *dbpool*)
      (begin
	(mutex-unlock! *pool-mutex*)
	(let ((db (open-database param)))
	  (set-busy-handler! db (busy-timeout 10000))