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;;======================================================================
(define (tasks:register-monitor db)
(let* ((pid (current-process-id))
(hostname (get-host-name))
(userinfo (user-information (current-user-id)))
(username (car userinfo)))
(print "Register monitor, pid: " pid ", hostname: " hostname ", username: " username)
(sqlite3:execute db "INSERT INTO monitors (pid,start_time,last_update,hostname,username) VALUES (?,strftime('%s','now'),strftime('%s','now'),?,?);"
pid hostname username)))
(define (tasks:get-num-alive-monitors db)
(let ((res 0))
(sqlite3:for-each-row
(lambda (count)
(set! res count))
db
"SELECT count(id) FROM monitors WHERE last_update < (strftime('%s','now') - 300) AND username=?;"
(car (user-information (current-user-id))))
res))
;; register a task
(define (tasks:add db action owner target runname test item)
(sqlite3:execute db "INSERT INTO tasks_queue (action,owner,state,target,name,test,item,creation_time,execution_time)
VALUES (?,?,'new',?,?,?,?,strftime('%s','now'),0);"
action
owner
target
runname
test
item))
(define (keys:key-vals-hash->target keys key-params)
(let ((tmp (hash-table-ref/default key-params (vector-ref (car keys) 0) "")))
(if (> (length keys) 1)
(for-each (lambda (key)
(set! tmp (conc tmp "/" (hash-table-ref/default key-params (vector-ref key 0) ""))))
(cdr keys)))
tmp))
;; for use from the gui
(define (tasks:add-from-params db action keys key-params var-params)
(let ((target (keys:key-vals-hash->target keys key-params))
(owner (car (user-information (current-user-id))))
(runname (hash-table-ref/default var-params "runname" #f))
(testpatts (hash-table-ref/default var-params "testpatts" "%"))
(itempatts (hash-table-ref/default var-params "itempatts" "%")))
(tasks:add db action owner target runname testpatts itempatts)))
;; return one task from those who are 'new' OR 'waiting' AND more than 10sec old
;;
(define (tasks:snag-a-task db)
(let ((res #f))
(with-transaction
db
(lambda ()
;; execution time is updated with every snag, wait 10 secs before doing anything with the queue
(sqlite3:for-each-row
(lambda (id . rem)
(set! res (apply vector id rem)))
db
"SELECT id,action,owner,state,target,name,test,item,creation_time,exectution_time
"SELECT id,action,owner,state,target,name,test,item,creation_time,execution_time
FROM tasks_queue
WHERE
state='new' OR (state='waiting' AND
last_update+10 > strftime('%s','now'))
LIMIT 1;")
state='new' OR
(state='waiting' AND execution_time+10 > strftime('%s','now')) OR
state='reset'
ORDER BY state ASC LIMIT 1;")
(if res ;; yep, have work to be done
(begin
(sqlite3:execute db "UPDATE tasks_queue SET state='inprogress' WHERE id=?;"
(sqlite3:execute db "UPDATE tasks_queue SET state='inprogress',execution_time=strftime('%s','now') WHERE id=?;"
(tasks:task-get-id res))
res)
#f)))))
(define (tasks:reset-stuck-tasks db)
(let ((res '()))
(sqlite3:for-each-row
(lambda (id delta)
(set! res (cons id res)))
db
"SELECT id,strftime('%s','now')-execution_time AS delta FROM tasks_queue WHERE state='inprogress' AND delta>700 ORDER BY delta DESC LIMIT 2;")
(sqlite3:execute
db
(conc "UPDATE tasks_queue SET state='reset' WHERE id IN ('" (string-intersperse (map conc res) "','") "');"))))
;; return all tasks in the tasks_queue table
;;
(define (tasks:get-tasks db types states)
(let ((res '()))
(sqlite3:for-each-row
(lambda (id . rem)
(set! res (cons (apply vector id rem) res)))
db
(conc "SELECT id,action,owner,state,target,name,test,item,creation_time,execution_time
FROM tasks_queue "
;; WHERE
;; state IN " statesstr " AND
;; action IN " actionsstr
" ORDER BY creation_time DESC;"))
res))))))
(let loop ((count 0))
(let loop ((count 0)
(next-touch 0)) ;; next-touch is the time where we need to update last_update
;; if the db has been modified we'd best look at the task queue
(let ((modtime (file-modification-time megatestdb)))
(let ((modtime (file-modification-time megatestdbpath )))
(if (> modtime last-db-update)
(tasks:process-queue db last-db-update megatestdb next-touch))
;; WARNING: Possible race conditon here!!
;; should this update be immediately after the task-get-action call above?
(if (> (current-seconds) next-touch)
(begin
(tasks:monitors-update db)
(loop (+ count 1)(+ (current-seconds) 240)))
(loop (+ count 1) next-touch)))))))
(define (tasks:process-queue db megatestdbpath)
(let* ((task (tasks:snag-a-task db))
(action (if task (tasks:task-get-action task) #f)))
(if action
(case (string->symbol action)
((run) (tasks:start-run db task))
((remove) (tasks:remove-runs db task))
((lock) (tasks:lock-runs db task))
((monitor) (tasks:start-monitor db task))
((rollup) (tasks:rollup-runs db task))
((updatemeta)(tasks:update-meta db task))
((kill) (tasks:kill-monitors db task))))
;; WARNING: Possible race conditon here!!
;; should this update be immediately after the task-get-action call above?
(set! modtime (file-modification-time megatestdb)))))
(loop (+ count 1))))))
|