;; Copyright 2006-2012, Matthew Welland.
;;
;; This program is made available under the GNU GPL version 2.0 or
;; greater. See the accompanying file COPYING for details.
;;
;; This program is distributed WITHOUT ANY WARRANTY; without even the
;; implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
;; PURPOSE.
;; strftime('%m/%d/%Y %H:%M:%S','now','localtime')
(use sqlite3 srfi-1 posix regex regex-case srfi-69 dot-locking format)
(import (prefix sqlite3 sqlite3:))
(declare (unit tasks))
(declare (uses db))
(declare (uses common))
(include "task_records.scm")
;;======================================================================
;; Tasks db
;;======================================================================
;; wait up to aprox n seconds for a journal to go away
;;
(define (tasks:wait-on-journal path n #!key (remove #f)(waiting-msg #f))
(if (not (string? path))
(debug:print 0 "ERROR: Called tasks:wait-on-journal with path=" path " (not a string)")
(let ((fullpath (conc path "-journal")))
(handle-exceptions
exn
(begin
(print-call-chain (current-error-port))
(debug:print 0 " message: " ((condition-property-accessor 'exn 'message) exn))
(debug:print 0 " exn=" (condition->list exn))
(debug:print 0 "tasks:wait-on-journal failed. Continuing on, you can ignore this call-chain")
#t) ;; if stuff goes wrong just allow it to move on
(let loop ((journal-exists (file-exists? fullpath))
(count n)) ;; wait ten times ...
(if journal-exists
(begin
(if (and waiting-msg
(eq? (modulo n 30) 0))
(debug:print 0 waiting-msg))
(if (> count 0)
(begin
(thread-sleep! 1)
(loop (file-exists? fullpath)
(- count 1)))
(begin
(if remove (system (conc "rm -rf " fullpath)))
#f)))
#t))))))
(define (tasks:get-task-db-path)
(let* ((linktree (configf:lookup *configdat* "setup" "linktree"))
(dbpath (conc linktree "/.db")))
dbpath))
;; If file exists AND
;; file readable
;; ==> open it
;; If file exists AND
;; file NOT readable
;; ==> open in-mem version
;; If file NOT exists
;; ==> open in-mem version
;;
(define (tasks:open-db #!key (numretries 4))
(if *task-db*
*task-db*
(handle-exceptions
exn
(if (> numretries 0)
(begin
(print-call-chain (current-error-port))
(debug:print 0 " message: " ((condition-property-accessor 'exn 'message) exn))
(debug:print 0 " exn=" (condition->list exn))
(thread-sleep! 1)
(tasks:open-db numretries (- numretries 1)))
(begin
(print-call-chain (current-error-port))
(debug:print 0 " message: " ((condition-property-accessor 'exn 'message) exn))
(debug:print 0 " exn=" (condition->list exn))))
(let* ((dbpath (tasks:get-task-db-path))
(dbfile (conc dbpath "/monitor.db"))
(avail (tasks:wait-on-journal dbpath 10)) ;; wait up to about 10 seconds for the journal to go away
(exists (file-exists? dbpath))
(write-access (file-write-access? dbpath))
(mdb (cond ;; what the hek is *toppath* doing here?
((and (string? *toppath*)(file-write-access? *toppath*))
(sqlite3:open-database dbfile))
((file-read-access? dbpath) (sqlite3:open-database dbfile))
(else (sqlite3:open-database ":memory:")))) ;; (never-give-up-open-db dbpath))
(handler (make-busy-timeout 36000)))
(if (and exists
(not write-access))
(set! *db-write-access* write-access)) ;; only unset so other db's also can use this control
(sqlite3:set-busy-handler! mdb handler)
(db:set-sync mdb) ;; (sqlite3:execute mdb (conc "PRAGMA synchronous = 0;"))
;; (if (or (and (not exists)
;; (file-write-access? *toppath*))
;; (not (file-read-access? dbpath)))
;; (begin
(sqlite3:execute mdb "CREATE TABLE IF NOT EXISTS tasks_queue (id INTEGER PRIMARY KEY,
action TEXT DEFAULT '',
owner TEXT,
state TEXT DEFAULT 'new',
target TEXT DEFAULT '',
name TEXT DEFAULT '',
testpatt TEXT DEFAULT '',
keylock TEXT,
params TEXT,
creation_time TIMESTAMP,
execution_time TIMESTAMP);")
(sqlite3:execute mdb "CREATE TABLE IF NOT EXISTS monitors (id INTEGER PRIMARY KEY,
pid INTEGER,
start_time TIMESTAMP,
last_update TIMESTAMP,
hostname TEXT,
username TEXT,
CONSTRAINT monitors_constraint UNIQUE (pid,hostname));")
(sqlite3:execute mdb "CREATE TABLE IF NOT EXISTS servers (id INTEGER PRIMARY KEY,
pid INTEGER,
interface TEXT,
hostname TEXT,
port INTEGER,
pubport INTEGER,
start_time TIMESTAMP,
priority INTEGER,
state TEXT,
mt_version TEXT,
heartbeat TIMESTAMP,
transport TEXT,
run_id INTEGER);")
;; CONSTRAINT servers_constraint UNIQUE (pid,hostname,port));")
(sqlite3:execute mdb "CREATE TABLE IF NOT EXISTS clients (id INTEGER PRIMARY KEY,
server_id INTEGER,
pid INTEGER,
hostname TEXT,
cmdline TEXT,
login_time TIMESTAMP,
logout_time TIMESTAMP DEFAULT -1,
CONSTRAINT clients_constraint UNIQUE (pid,hostname));")
;))
(sqlite3:execute mdb "DELETE FROM tasks_queue WHERE state='done' AND creation_time < ?;" (- (current-seconds)(* 24 60 60))) ;; remove older than 24 hrs
(set! *task-db* (cons mdb dbpath))
*task-db*))))
;;======================================================================
;; Server and client management
;;======================================================================
;; make-vector-record tasks hostinfo id interface port pubport transport pid hostname
(define (tasks:hostinfo-get-id vec) (vector-ref vec 0))
(define (tasks:hostinfo-get-interface vec) (vector-ref vec 1))
(define (tasks:hostinfo-get-port vec) (vector-ref vec 2))
(define (tasks:hostinfo-get-pubport vec) (vector-ref vec 3))
(define (tasks:hostinfo-get-transport vec) (vector-ref vec 4))
(define (tasks:hostinfo-get-pid vec) (vector-ref vec 5))
(define (tasks:hostinfo-get-hostname vec) (vector-ref vec 6))
(define (tasks:server-lock-slot mdb run-id)
(tasks:server-clean-out-old-records-for-run-id mdb run-id " tasks:server-lock-slot")
(if (< (tasks:num-in-available-state mdb run-id) 4)
(begin
(tasks:server-set-available mdb run-id)
(thread-sleep! 2) ;; Try removing this. It may not be needed.
(tasks:server-am-i-the-server? mdb run-id))
#f))
;; register that this server may come online (first to register goes though with the process)
(define (tasks:server-set-available mdb run-id)
(sqlite3:execute
mdb
"INSERT INTO servers (pid,hostname,port,pubport,start_time, priority,state,mt_version,heartbeat, interface,transport,run_id)
VALUES(?, ?, ?, ?, strftime('%s','now'), ?, ?, ?,-1,?, ?, ?);"
(current-process-id) ;; pid
(get-host-name) ;; hostname
-1 ;; port
-1 ;; pubport
(random 1000) ;; priority (used a tiebreaker on get-available)
"available" ;; state
(common:version-signature) ;; mt_version
-1 ;; interface
(conc *transport-type*) ;; transport
run-id
))
(define (tasks:num-in-available-state mdb run-id)
(let ((res 0))
(sqlite3:for-each-row
(lambda (num-in-queue)
(set! res num-in-queue))
mdb
"SELECT count(id) FROM servers WHERE run_id=? AND state = 'available' AND (strftime('%s','now') - start_time) < 30 ;"
run-id)
res))
(define (tasks:num-servers-non-zero-running mdb)
(let ((res 0))
(sqlite3:for-each-row
(lambda (num-running)
(set! res num-running))
mdb
"SELECT count(id) FROM servers WHERE run_id != 0 AND state = 'running';")
res))
(define (tasks:server-clean-out-old-records-for-run-id mdb run-id tag)
(sqlite3:execute mdb "UPDATE servers SET state=?,heartbeat=strftime('%s','now') WHERE state in ('available','dbprep','shutting-down') AND (strftime('%s','now') - start_time) > 50 AND run_id=?;"
(conc "defunct" tag) run-id))
(define (tasks:server-force-clean-running-records-for-run-id mdb run-id tag)
(sqlite3:execute mdb "UPDATE servers SET state=?,heartbeat=strftime('%s','now') WHERE state = 'running' AND run_id=?;"
(conc "defunct" tag) run-id))
(define (tasks:server-force-clean-run-record mdb run-id iface port tag)
(sqlite3:execute mdb "UPDATE servers SET state=?,heartbeat=strftime('%s','now') WHERE state = 'running' AND run_id=? AND interface=? AND port=?;"
(conc "defunct" tag) run-id iface port))
(define (tasks:server-delete-records-for-this-pid mdb tag)
(sqlite3:execute mdb "UPDATE servers SET state=?,heartbeat=strftime('%s','now') WHERE hostname=? AND pid=?;"
(conc "defunct" tag) (get-host-name) (current-process-id)))
(define (tasks:server-delete-record mdb server-id tag)
(sqlite3:execute mdb "UPDATE servers SET state=?,heartbeat=strftime('%s','now') WHERE id=?;"
(conc "defunct" tag) server-id)
;; use this opportuntity to clean out records over one month old or over 10 minutes old with port = -1 (i.e. a never used placeholder)
(sqlite3:execute mdb "DELETE FROM servers WHERE state not in ('running','shutting-down','dbprep') AND (strftime('%s','now') - start_time) > 2628000;")
(sqlite3:execute mdb "DELETE FROM servers WHERE state like 'defunct%' AND port=-1 AND (strftime('%s','now') - start_time) > 600;")
)
(define (tasks:server-set-state! mdb server-id state)
(sqlite3:execute mdb "UPDATE servers SET state=?,heartbeat=strftime('%s','now') WHERE id=?;" state server-id))
(define (tasks:server-set-interface-port mdb server-id interface port)
(sqlite3:execute mdb "UPDATE servers SET interface=?,port=?,heartbeat=strftime('%s','now') WHERE id=?;" interface port server-id))
;; Get random port not used in long time
;;
(define (tasks:server-get-next-port mdb)
(let* ((lownum 30000)
(highnum 64000)
(used-ports '())
(get-rand-port (lambda ()
(+ lownum (random (- highnum lownum)))))
(port-param (if (and (args:get-arg "-port")
(string->number (args:get-arg "-port")))
(string->number (args:get-arg "-port"))
#f))
;; (config-port (if (and (config-lookup *configdat* "server" "port")
;; (string->number (config-lookup *configdat* "server" "port")))
;; (string->number (config-lookup *configdat* "server" "port"))
;; #f))
)
(sqlite3:for-each-row
(lambda (port)
(set! used-ports (cons port used-ports)))
mdb
"SELECT port FROM servers;")
(cond
((and port-param res) (if (> res port-param) res port-param))
(port-param port-param)
;; ((and config-port res) (if (> res config-port) res config-port))
;; (config-port config-port)
(else
(let loop ((port (get-rand-port))
(remtries 100))
(if (member port used-ports)
(if (> remtries 0)
(loop (get-rand-port)(- remtries 1))
(get-rand-port))
port))))))
(define (tasks:server-am-i-the-server? mdb run-id)
(let* ((all (tasks:server-get-servers-vying-for-run-id mdb run-id))
(first (if (null? all)
(begin (debug:print 0 "ERROR: no servers listed, should be at least one by now.")
(sqlite3:finalize! mdb)
(exit 1))
(car (db:get-rows all))))
(header (db:get-header all))
(id (db:get-value-by-header first header "id"))
(hostname (db:get-value-by-header first header "hostname"))
(pid (db:get-value-by-header first header "pid"))
(priority (db:get-value-by-header first header "priority")))
(debug:print 0 "INFO: am-i-the-server got record " first)
;; for now a basic check. add tiebreaking by priority later
(if (and (equal? hostname (get-host-name))
(equal? pid (current-process-id)))
id
#f)))
;; Use: (db:get-value-by-header (car (db:get-rows dat)) (db:get-header dat) "fieldname")
;; to extract info from the structure returned
;;
(define (tasks:server-get-servers-vying-for-run-id mdb run-id)
(let* ((header (list "id" "hostname" "pid" "interface" "port" "pubport" "state" "run_id" "priority" "start_time"))
(selstr (string-intersperse header ","))
(res '()))
(sqlite3:for-each-row
(lambda (a . b)
(set! res (cons (apply vector a b) res)))
mdb
(conc "SELECT " selstr " FROM servers WHERE run_id=? AND state in ('available','running','dbprep') ORDER BY start_time DESC;")
run-id)
(vector header res)))
(define (tasks:get-server mdb run-id #!key (retries 10))
(let ((res #f)
(best #f))
(handle-exceptions
exn
(begin
(print-call-chain (current-error-port))
(debug:print 0 "WARNING: tasks:get-server db access error.")
(debug:print 0 " message: " ((condition-property-accessor 'exn 'message) exn))
(debug:print 0 " for run " run-id)
(print-call-chain (current-error-port))
(if (> retries 0)
(begin
(debug:print 0 " trying call to tasks:get-server again in 10 seconds")
(thread-sleep! 10)
(tasks:get-server mdb run-id retries: (- retries 0)))
(debug:print 0 "10 tries of tasks:get-server all crashed and burned. Giving up and returning \"no server found\"")))
(sqlite3:for-each-row
(lambda (id interface port pubport transport pid hostname)
(set! res (vector id interface port pubport transport pid hostname)))
mdb
;; removed:
;; strftime('%s','now')-heartbeat < 10 AND mt_version = ?
"SELECT id,interface,port,pubport,transport,pid,hostname FROM servers
WHERE run_id=? AND state='running'
ORDER BY start_time DESC LIMIT 1;" run-id) ;; (common:version-signature) run-id)
res)))
(define (tasks:server-running-or-starting? mdb run-id)
(let ((res #f))
(sqlite3:for-each-row
(lambda (id)
(set! res id))
mdb ;; NEEDS dbprep ADDED
"SELECT id FROM servers WHERE run_id=? AND (state = 'running' OR (state = 'dbprep' AND (strftime('%s','now') - start_time) < 60));" run-id)
res))
(define (tasks:need-server run-id)
(let ((forced (configf:lookup *configdat* "server" "required"))
(maxqry (cdr (rmt:get-max-query-average run-id)))
(threshold (string->number (or (configf:lookup *configdat* "server" "server-query-threshold") "10"))))
(cond
(forced
(if (common:low-noise-print 60 run-id "server required is set")
(debug:print-info 0 "Server required is set, starting server."))
#t)
((> maxqry threshold)
(if (common:low-noise-print 60 run-id "Max query time execeeded")
(debug:print-info 0 "Max avg query time of " maxqry "ms exceeds limit of " threshold "ms, starting server."))
#t)
(else
#f))))
;; try to start a server and wait for it to be available
;;
(define (tasks:start-and-wait-for-server tdbdat run-id delay-max-tries)
;; ensure a server is running for this run
(let loop ((server-dat (tasks:get-server (db:delay-if-busy tdbdat) run-id))
(delay-time 0))
(if (and (not server-dat)
(< delay-time delay-max-tries))
(begin
(if (common:low-noise-print 60 "tasks:start-and-wait-for-server" run-id)
(debug:print 0 "Try starting server for run-id " run-id))
(server:kind-run run-id)
(thread-sleep! (min delay-time 5))
(loop (tasks:get-server (db:delay-if-busy tdbdat) run-id)(+ delay-time 1))))))
(define (tasks:get-all-servers mdb)
(let ((res '()))
(sqlite3:for-each-row
(lambda (id pid hostname interface port pubport start-time priority state mt-version last-update transport run-id)
;; 0 1 2 3 4 5 6 7 8 9 10 11 12
(set! res (cons (vector id pid hostname interface port pubport start-time priority state mt-version last-update transport run-id) res)))
mdb
"SELECT id,pid,hostname,interface,port,pubport,start_time,priority,state,mt_version,strftime('%s','now')-heartbeat AS last_update,transport,run_id FROM servers WHERE state NOT LIKE 'defunct%' ORDER BY start_time DESC;")
res))
;; no elegance here ...
;;
(define (tasks:kill-server hostname pid)
(debug:print-info 0 "Attempting to kill server process " pid " on host " hostname)
(setenv "TARGETHOST" hostname)
(setenv "TARGETHOST_LOGF" "server-kills.log")
(system (conc "nbfake kill " pid))
(unsetenv "TARGETHOST_LOGF")
(unsetenv "TARGETHOST"))
;; look up a server by run-id and send it a kill, also delete the record for that server
;;
(define (tasks:kill-server-run-id run-id #!key (tag "default"))
(let* ((tdbdat (tasks:open-db))
(sdat (tasks:get-server (db:delay-if-busy tdbdat) run-id)))
(if sdat
(let ((hostname (vector-ref sdat 6))
(pid (vector-ref sdat 5))
(server-id (vector-ref sdat 0)))
(debug:print-info 0 "Killing server " server-id " for run-id " run-id " on host " hostname " with pid " pid)
(tasks:kill-server hostname pid)
(tasks:server-delete-record (db:delay-if-busy tdbdat) server-id tag) )
(debug:print-info 0 "No server found for run-id " run-id ", nothing to kill"))
;; (sqlite3:finalize! tdb)
))
;;======================================================================
;; Tasks and Task monitors
;;======================================================================
;;======================================================================
;; Tasks
;;======================================================================
;;======================================================================
;; Task Monitors
;;======================================================================
(define (tasks:register-monitor db mdb)
(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 mdb "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 mdb)
(let ((res 0))
(sqlite3:for-each-row
(lambda (count)
(set! res count))
mdb
"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 mdb action owner target runname testpatt params)
(sqlite3:execute mdb "INSERT INTO tasks_queue (action,owner,state,target,name,testpatt,params,creation_time,execution_time)
VALUES (?,?,'new',?,?,?,?,strftime('%s','now'),0);"
action
owner
target
runname
testpatt
(if params params "")))
(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 mdb 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" "%"))
(params (hash-table-ref/default var-params "params" "")))
(tasks:add mdb action owner target runname testpatts params)))
;; return one task from those who are 'new' OR 'waiting' AND more than 10sec old
;;
(define (tasks:snag-a-task mdb)
(let ((res #f)
(keytxt (conc (current-process-id) "-" (get-host-name) "-" (car (user-information (current-user-id))))))
;; first randomly set a new to pid-hostname-hostname
(sqlite3:execute
mdb
"UPDATE tasks_queue SET keylock=? WHERE id IN
(SELECT id FROM tasks_queue
WHERE state='new' OR
(state='waiting' AND (strftime('%s','now')-execution_time) > 10) OR
state='reset'
ORDER BY RANDOM() LIMIT 1);" keytxt)
(sqlite3:for-each-row
(lambda (id . rem)
(set! res (apply vector id rem)))
mdb
"SELECT id,action,owner,state,target,name,test,item,params,creation_time,execution_time FROM tasks_queue WHERE keylock=? ORDER BY execution_time ASC LIMIT 1;" keytxt)
(if res ;; yep, have work to be done
(begin
(sqlite3:execute mdb "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 mdb)
(let ((res '()))
(sqlite3:for-each-row
(lambda (id delta)
(set! res (cons id res)))
mdb
"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
mdb
(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 mdb types states)
(let ((res '()))
(sqlite3:for-each-row
(lambda (id . rem)
(set! res (cons (apply vector id rem) res)))
mdb
(conc "SELECT id,action,owner,state,target,name,test,item,params,creation_time,execution_time
FROM tasks_queue "
;; WHERE
;; state IN " statesstr " AND
;; action IN " actionsstr
" ORDER BY creation_time DESC;"))
res))
;; remove tasks given by a string of numbers comma separated
(define (tasks:remove-queue-entries mdb task-ids)
(sqlite3:execute mdb (conc "DELETE FROM tasks_queue WHERE id IN (" task-ids ");")))
;;
(define (tasks:start-monitor db mdb)
(if (> (tasks:get-num-alive-monitors mdb) 2) ;; have two running, no need for more
(debug:print-info 1 "Not starting monitor, already have more than two running")
(let* ((megatestdb (conc *toppath* "/megatest.db"))
(monitordbf (conc (configf:lookup *configdat* "setup" "linktree") "/.db/monitor.db"))
(last-db-update 0)) ;; (file-modification-time megatestdb)))
(task:register-monitor mdb)
(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 megatestdbpath )))
(if (> modtime last-db-update)
(tasks:process-queue db mdb 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 mdb)
(loop (+ count 1)(+ (current-seconds) 240)))
(loop (+ count 1) next-touch)))))))
(define (tasks:process-queue db mdb)
(let* ((task (tasks:snag-a-task mdb))
(action (if task (tasks:task-get-action task) #f)))
(if action (print "tasks:process-queue task: " task))
(if action
(case (string->symbol action)
((run) (tasks:start-run db mdb task))
((remove) (tasks:remove-runs db mdb task))
((lock) (tasks:lock-runs db mdb task))
;; ((monitor) (tasks:start-monitor db task))
((rollup) (tasks:rollup-runs db mdb task))
((updatemeta)(tasks:update-meta db mdb task))
((kill) (tasks:kill-monitors db mdb task))))))
(define (tasks:get-monitors mdb)
(let ((res '()))
(sqlite3:for-each-row
(lambda (a . rem)
(set! res (cons (apply vector a rem) res)))
mdb
"SELECT id,pid,strftime('%m/%d/%Y %H:%M',datetime(start_time,'unixepoch'),'localtime'),strftime('%m/%d/%Y %H:%M:%S',datetime(last_update,'unixepoch'),'localtime'),hostname,username FROM monitors ORDER BY last_update ASC;")
(reverse res)
))
(define (tasks:tasks->text tasks)
(let ((fmtstr "~10a~10a~10a~12a~20a~12a~12a~10a"))
(conc (format #f fmtstr "id" "action" "owner" "state" "target" "runname" "testpatts" "params") "\n"
(string-intersperse
(map (lambda (task)
(format #f fmtstr
(tasks:task-get-id task)
(tasks:task-get-action task)
(tasks:task-get-owner task)
(tasks:task-get-state task)
(tasks:task-get-target task)
(tasks:task-get-name task)
(tasks:task-get-test task)
;; (tasks:task-get-item task)
(tasks:task-get-params task)))
tasks) "\n"))))
(define (tasks:monitors->text-table monitors)
(let ((fmtstr "~4a~8a~20a~20a~10a~10a"))
(conc (format #f fmtstr "id" "pid" "start time" "last update" "hostname" "user") "\n"
(string-intersperse
(map (lambda (monitor)
(format #f fmtstr
(tasks:monitor-get-id monitor)
(tasks:monitor-get-pid monitor)
(tasks:monitor-get-start_time monitor)
(tasks:monitor-get-last_update monitor)
(tasks:monitor-get-hostname monitor)
(tasks:monitor-get-username monitor)))
monitors)
"\n"))))
;; update the last_update field with the current time and
;; if any monitors appear dead, remove them
(define (tasks:monitors-update mdb)
(sqlite3:execute mdb "UPDATE monitors SET last_update=strftime('%s','now') WHERE pid=? AND hostname=?;"
(current-process-id)
(get-host-name))
(let ((deadlist '()))
(sqlite3:for-each-row
(lambda (id pid host last-update delta)
(print "Going to delete stale record for monitor with pid " pid " on host " host " last updated " delta " seconds ago")
(set! deadlist (cons id deadlist)))
mdb
"SELECT id,pid,hostname,last_update,strftime('%s','now')-last_update AS delta FROM monitors WHERE delta > 700;")
(sqlite3:execute mdb (conc "DELETE FROM monitors WHERE id IN ('" (string-intersperse (map conc deadlist) "','") "');")))
)
(define (tasks:remove-monitor-record mdb)
(sqlite3:execute mdb "DELETE FROM monitors WHERE pid=? AND hostname=?;"
(current-process-id)
(get-host-name)))
(define (tasks:set-state mdb task-id state)
(sqlite3:execute mdb "UPDATE tasks_queue SET state=? WHERE id=?;"
state
task-id))
;;======================================================================
;; Access using task key (stored in params; (hash-table->alist flags) hostname pid
;;======================================================================
(define (tasks:param-key->id mdb task-params)
(handle-exceptions
exn
#f
(sqlite3:first-result mdb "SELECT id FROM tasks_queue WHERE params LIKE ?;" task-params)))
(define (tasks:set-state-given-param-key mdb param-key new-state)
(sqlite3:execute mdb "UPDATE tasks_queue SET state=? WHERE params LIKE ?;" new-state param-key))
(define (tasks:get-records-given-param-key mdb param-key state-patt action-patt test-patt)
(handle-exceptions
exn
'()
(sqlite3:first-row mdb "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)))
;;======================================================================
;; Rogue items, no place to put these yet
;;======================================================================
(define (tasks:find-task-queue-records mdb target run-name test-patt state-patt action-patt)
;; (handle-exceptions
;; exn
;; '()
;; (sqlite3:first-row
(let ((res '()))
(sqlite3:for-each-row
(lambda (a . b)
(set! res (cons (cons a b) res)))
mdb "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)) ;; )
(define (tasks:kill-runner mdb target run-name)
(let ((records (tasks:find-task-queue-records mdb target run-name "%" "running" "run-tests"))
(hostpid-rx (regexp "\\s+(\\w+)\\s+(\\d+)$"))) ;; host pid is at end of param string
(if (null? records)
(debug:print 0 "No run launching processes found for " target " / " run-name)
(debug:print 0 "Found " (length records) " run(s) to kill."))
(for-each
(lambda (record)
(let* ((param-key (list-ref record 8))
(match-dat (string-search hostpid-rx param-key)))
(if match-dat
(let ((hostname (cadr match-dat))
(pid (string->number (caddr match-dat))))
(debug:print 0 "Sending SIGINT to process " pid " on host " hostname)
(if (equal? (get-host-name) hostname)
(if (process:alive? pid)
(begin
(handle-exceptions
exn
(begin
(debug:print 0 "Kill of process " pid " on host " hostname " failed.")
(debug:print 0 " message: " ((condition-property-accessor 'exn 'message) exn))
#t)
(process-signal pid signal/int)
(thread-sleep! 5)
(if (process:alive? pid)
(process-signal pid signal/kill)))))
;; (call-with-environment-variables
(let ((old-targethost (getenv "TARGETHOST")))
(setenv "TARGETHOST" hostname)
(setenv "TARGETHOST_LOGF" "server-kills.log")
(system (conc "nbfake kill " pid))
(if old-targethost (setenv "TARGETHOST" old-targethost))
(unsetenv "TARGETHOST")
(unsetenv "TARGETHOST_LOGF"))))
(debug:print 0 "ERROR: no record or improper record for " target "/" run-name " in tasks_queue in monitor.db"))))
records)))
;;======================================================================
;; The routines to process tasks
;;======================================================================
;; NOTE: It might be good to add one more layer of checking to ensure
;; that no task gets run in parallel.
(define (tasks:start-run db mdb task)
(let ((flags (make-hash-table)))
(hash-table-set! flags "-rerun" "NOT_STARTED")
(if (not (string=? (tasks:task-get-params task) ""))
(hash-table-set! flags "-setvars" (tasks:task-get-params task)))
(print "Starting run " task)
;; sillyness, just call the damn routine with the task vector and be done with it. FIXME SOMEDAY
(runs:run-tests db
(tasks:task-get-target task)
(tasks:task-get-name task)
(tasks:task-get-test task)
(tasks:task-get-item task)
(tasks:task-get-owner task)
flags)
(tasks:set-state mdb (tasks:task-get-id task) "waiting")))
(define (tasks:rollup-runs db mdb task)
(let* ((flags (make-hash-table))
(keys (db:get-keys db))
(keyvals (keys:target-keyval keys (tasks:task-get-target task))))
;; (hash-table-set! flags "-rerun" "NOT_STARTED")
(print "Starting rollup " task)
;; sillyness, just call the damn routine with the task vector and be done with it. FIXME SOMEDAY
(runs:rollup-run db
keys
keyvals
(tasks:task-get-name task)
(tasks:task-get-owner task))
(tasks:set-state mdb (tasks:task-get-id task) "waiting")))