69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
))
mdb))
;;======================================================================
;; Server and client management
;;======================================================================
(define (tasks:server-register mdb pid hostname port priority state)
(sqlite3:execute
mdb
"INSERT OR REPLACE INTO servers (pid,hostname,port,start_time,priority,state) VALUES(?,?,?,strftime('%s','now'),?);"
pid hostname port priority state))
(define (tasks:server-deregister mdb pid hostname)
(sqlite3:execute mdb "DELETE FROM servers WHERE pid=? AND hostname=?;" pid hostname))
(define (tasks:server-get-server-id mdb)
;; dunno yet
0)
(define (tasks:client-register mdb pid hostname cmdline)
(sqlite3:execute
|
>
|
>
|
>
>
>
>
>
>
|
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
))
mdb))
;;======================================================================
;; Server and client management
;;======================================================================
;; state: 'live, 'shutting-down, 'dead
(define (tasks:server-register mdb pid hostname port priority state)
(sqlite3:execute
mdb
"INSERT OR REPLACE INTO servers (pid,hostname,port,start_time,priority,state) VALUES(?,?,?,strftime('%s','now'),?);"
pid hostname port priority state))
(define (tasks:server-deregister mdb hostname #!key (port #f)(pid #f))
(if pid
(sqlite3:execute mdb "DELETE FROM servers WHERE hostname=? AND pid=?;" hostname pid)
(if port
(sqlite3:execute mdb "DELETE FROM servers WHERE hostname=? AND port=?;" hostname port)
(debug:print 0 "ERROR: tasks:server-deregister called with neither pid nor port specified"))))
(define (tasks:server-deregister-self mdb)
(tasks:server-deregister mdb pid: (current-process-id) (get-host-name)))
(define (tasks:server-get-server-id mdb)
;; dunno yet
0)
(define (tasks:client-register mdb pid hostname cmdline)
(sqlite3:execute
|
106
107
108
109
110
111
112
113
114
115
116
117
118
119
|
(set! res (cons (vector id server-id pid hostname cmdline login-time lougout-time) res)))
mdb
"SELECT id,server_id,pid,hostname,cmdline,login_time,logout_time FROM clients WHERE server_id=?;"
server-id)))
(define (tasks:have-clients? mdb server-id)
(null? (tasks:get-logged-in-clients mdb server-id)))
;;======================================================================
;; Tasks and Task monitors
;;======================================================================
;;======================================================================
|
>
>
>
>
>
>
>
>
>
>
|
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
(set! res (cons (vector id server-id pid hostname cmdline login-time lougout-time) res)))
mdb
"SELECT id,server_id,pid,hostname,cmdline,login_time,logout_time FROM clients WHERE server_id=?;"
server-id)))
(define (tasks:have-clients? mdb server-id)
(null? (tasks:get-logged-in-clients mdb server-id)))
(define (tasks:get-best-server mdb)
(let ((res '()))
(sqlite3:for-each-row
(lambda (id hostname port)
(set! res (list hostname port)))
mdb
"SELECT id,hostname,port FROM servers WHERE state='live' ORDER BY start_time DESC LIMIT 1;")
res))
;;======================================================================
;; Tasks and Task monitors
;;======================================================================
;;======================================================================
|