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(include "task_records.scm")
;;======================================================================
;; Tasks db
;;======================================================================
(define (tasks:open-db)
(let* ((dbpath (conc *toppath* "/monitor.db"))
(exists (file-exists? dbpath))
(mdb (sqlite3:open-database dbpath)) ;; (never-give-up-open-db dbpath))
(handler (make-busy-timeout 36000)))
(sqlite3:set-busy-handler! mdb handler)
(sqlite3:execute mdb (conc "PRAGMA synchronous = 1;"))
(if (not exists)
(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 '',
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(include "task_records.scm")
;;======================================================================
;; Tasks db
;;======================================================================
(define (tasks:open-db)
(let* ((dbpath (conc *toppath* "/monitor.db"))
(exists (file-exists? dbpath))
(write-access (file-write-access? dbpath))
(mdb (sqlite3:open-database dbpath)) ;; (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)
(sqlite3:execute mdb (conc "PRAGMA synchronous = 0;"))
(if (not exists)
(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 '',
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pubport
transport
))
;; NB// two servers with same pid on different hosts will be removed from the list if pid: is used!
(define (tasks:server-deregister mdb hostname #!key (port #f)(pid #f)(action 'delete))
(debug:print-info 11 "server-deregister " hostname ", port " port ", pid " pid)
(if pid
(case action
((delete)(sqlite3:execute mdb "DELETE FROM servers WHERE pid=?;" pid))
(else (sqlite3:execute mdb "UPDATE servers SET state='dead' WHERE pid=?;" pid)))
(if port
(case action
((delete)(sqlite3:execute mdb "DELETE FROM servers WHERE (interface=? or hostname=?) AND port=?;" hostname hostname port))
(else (sqlite3:execute mdb "UPDATE servers SET state='dead' WHERE (interface=? or hostname=?) AND port=?;" hostname hostname port)))
(debug:print 0 "ERROR: tasks:server-deregister called with neither pid nor port specified"))))
(define (tasks:server-deregister-self mdb hostname)
(tasks:server-deregister mdb hostname pid: (current-process-id)))
;; need a simple call for robustly removing records given host and port
(define (tasks:server-delete mdb hostname port)
(tasks:server-deregister mdb hostname port: port action: 'delete))
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pubport
transport
))
;; NB// two servers with same pid on different hosts will be removed from the list if pid: is used!
(define (tasks:server-deregister mdb hostname #!key (port #f)(pid #f)(action 'delete))
(debug:print-info 11 "server-deregister " hostname ", port " port ", pid " pid)
(if *db-write-access*
(if pid
(case action
((delete)(sqlite3:execute mdb "DELETE FROM servers WHERE pid=?;" pid))
(else (sqlite3:execute mdb "UPDATE servers SET state='dead' WHERE pid=?;" pid)))
(if port
(case action
((delete)(sqlite3:execute mdb "DELETE FROM servers WHERE (interface=? or hostname=?) AND port=?;" hostname hostname port))
(else (sqlite3:execute mdb "UPDATE servers SET state='dead' WHERE (interface=? or hostname=?) AND port=?;" hostname hostname port)))
(debug:print 0 "ERROR: tasks:server-deregister called with neither pid nor port specified")))))
(define (tasks:server-deregister-self mdb hostname)
(tasks:server-deregister mdb hostname pid: (current-process-id)))
;; need a simple call for robustly removing records given host and port
(define (tasks:server-delete mdb hostname port)
(tasks:server-deregister mdb hostname port: port action: 'delete))
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(debug:print 0 "ERROR: tasks:server-get-server-id needs (hostname and pid) OR (iface and port) OR (hostname and port)")
"SELECT id FROM servers WHERE pid=-999;")))
(if hostname hostname iface)(if pid pid port))
res))
(define (tasks:server-update-heartbeat mdb server-id)
(debug:print-info 1 "Heart beat update of server id=" server-id)
(sqlite3:execute mdb "UPDATE servers SET heartbeat=strftime('%s','now') WHERE id=?;" server-id))
;; alive servers keep the heartbeat field upto date with seconds every 6 or so seconds
(define (tasks:server-alive? mdb server-id #!key (iface #f)(hostname #f)(port #f)(pid #f))
(let* ((server-id (if server-id
server-id
(tasks:server-get-server-id mdb hostname iface port pid)))
(heartbeat-delta 99e9))
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(debug:print 0 "ERROR: tasks:server-get-server-id needs (hostname and pid) OR (iface and port) OR (hostname and port)")
"SELECT id FROM servers WHERE pid=-999;")))
(if hostname hostname iface)(if pid pid port))
res))
(define (tasks:server-update-heartbeat mdb server-id)
(debug:print-info 1 "Heart beat update of server id=" server-id)
(handle-exceptions
exn
(begin
(debug:print 0 "WARNING: probable timeout on monitor.db access")
(thread-sleep! 1)
(tasks:server-update-heartbeat mdb server-id))
(sqlite3:execute mdb "UPDATE servers SET heartbeat=strftime('%s','now') WHERE id=?;" server-id)))
;; alive servers keep the heartbeat field upto date with seconds every 6 or so seconds
(define (tasks:server-alive? mdb server-id #!key (iface #f)(hostname #f)(port #f)(pid #f))
(let* ((server-id (if server-id
server-id
(tasks:server-get-server-id mdb hostname iface port pid)))
(heartbeat-delta 99e9))
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