38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
-
+
-
-
-
-
-
|
;; S U P P O R T F U N C T I O N S
;;======================================================================
;; if a server is either running or in the process of starting call client:setup
;; else return #f to let the calling proc know that there is no server available
;;
(define (rmt:get-connection-info run-id)
(let ((cinfo *runremote*)) ;; (hash-table-ref/default *runremote* run-id #f)))
(let ((cinfo (remote-conndat *runremote*)))
;; how about if rrr is a defstruct and we use a wrapper to access it (even better would be a macro)
;; look in common_records for with-mutex
;;
;; (with-mutex *rrr-mutex* rmt:dat-host *runremote*) => returns value
;; (with-mutex *rrr-mutex* rmt:
|
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
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
68
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
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
+
+
+
+
-
+
+
-
-
-
-
+
+
+
+
-
-
+
+
+
-
-
+
+
+
+
-
-
-
-
+
+
+
+
+
+
-
+
-
-
+
+
+
|
((> attemptnum 15)
(debug:print 0 *default-log-port* "ERROR: 15 tries to start/connect to server. Giving up.")
(exit 1))
;; ensure we have a record for our connection for given area
((not *runremote*)
(set! *runremote* (make-remote))
(mutex-unlock! *rmt-mutex*)
;; (print "case 1")
(rmt:send-receive cmd rid params attemptnum: attemptnum))
;; ensure we have a homehost record
((not (pair? (remote-hh-dat *runremote*))) ;; have a homehost record?
(thread-sleep! 0.1) ;; since we shouldn't get here, delay a little
(remote-hh-dat-set! *runremote* (common:get-homehost))
(mutex-unlock! *rmt-mutex*)
;; (print "case 2")
(rmt:send-receive cmd rid params attemptnum: attemptnum))
;; on homehost and this is a read
((and (cdr (remote-hh-dat *runremote*)) ;; on homehost
(member cmd api:read-only-queries)) ;; this is a read
(mutex-unlock! *rmt-mutex*)
;; (print "case 3")
(rmt:open-qry-close-locally cmd 0 params))
;; on homehost and this is a write, we already have a server
((and (cdr (remote-hh-dat *runremote*)) ;; on homehost
(not (member cmd api:read-only-queries)) ;; this is a write
(remote-server-url *runremote*)) ;; have a server
(mutex-unlock! *rmt-mutex*)
;; (print "case 4")
(rmt:open-qry-close-locally cmd 0 params))
;; no server contact made and this is a write, try starting a server
;; no server contact made and this is a write, passively start a server
((and (not (remote-server-url *runremote*))
(not (member cmd api:read-only-queries)))
;; (print "case 5")
(let ((serverconn (server:check-if-running *toppath*)))
(if serverconn
(remote-server-url-set! *runremote* serverconn) ;; the string can be consumed by the client setup if needed
(if (not (server:start-attempted? *toppath*))
(server:kind-run *toppath*))))
(if (cdr (remote-hh-dat *runremote*)) ;; we are on the homehost, just do the call
(begin
(mutex-unlock! *rmt-mutex*)
(rmt:open-qry-close-locally cmd 0 params))
(begin
(mutex-unlock! *rmt-mutex*)
(rmt:send-receive cmd rid params attemptnum: attemptnum))))
;; if not on homehost ensure we have a connection to a live server
((or (not (pair? (remote-hh-dat *runremote*))) ;; have a homehost record?
(not (cdr (remote-hh-dat *runremote*))) ;; have record, are we on a homehost?
(not (remote-conndat *runremote*))) ;; do we not have a connection?
(remote-hh-dat-set! *runremote* (common:get-homehost))
;; NOTE: we *have* a homehost record by now
((and (not (cdr (remote-hh-dat *runremote*))) ;; are we on a homehost?
(not (remote-conndat *runremote*))) ;; and no connection
;; (print "case 6 hh-dat: " (remote-hh-dat *runremote*) " conndat: " (remote-conndat *runremote*))
(remote-conndat-set! *runremote* (rmt:get-connection-info 0))
(server:kind-run *toppath*) ;; we need a sever
(tasks:start-and-wait-for-server (tasks:open-db) 0 15)
(remote-conndat-set! *runremote* (rmt:get-connection-info 0))
(rmt:send-receive cmd rid params attemptnum: attemptnum))
;; all set up if get this far, dispatch the query
((cdr (remote-hh-dat *runremote*)) ;; we are on homehost
(mutex-unlock! *rmt-mutex*)
;; (print "case 7")
(rmt:open-qry-close-locally cmd (if rid rid 0) params))
;; reset the connection if it has been unused too long
((and (remote-conndat *runremote*)
(let ((expire-time (- start-time (remote-server-timeout *runremote*))))
(< (http-transport:server-dat-get-last-access connection) expire-time)))
(remote-conndatr *runremote* #f))
(< (http-transport:server-dat-get-last-access (remote-conndat *runremote*)) expire-time)))
;; (print "case 8")
(remote-conndat-set! *runremote* #f))
;; not on homehost, do server query
(else
(mutex-unlock! *rmt-mutex*)
;; (print "case 9")
(let* ((conninfo (remote-conndat *runremote*))
(dat (case (remote-transport *runremote*)
((http)(condition-case
(http-transport:client-api-send-receive run-id conninfo cmd params)
((commfail)(vector #f "communications fail"))
((exn)(vector #f "other fail"))))
((http) ;; (condition-case ;; handling here has caused a lot of problems.
(http-transport:client-api-send-receive 0 conninfo cmd params)
;; ((commfail)(vector #f "communications fail"))
;; ((exn)(vector #f "other fail" (print-call-chain)))))
)
(else
(debug:print 0 *default-log-port* "ERROR: transport " (remote-transport *runremote*) " not supported")
(exit))))
(success (if (vector? dat) (vector-ref dat 0) #f))
(res (if (vector? dat) (vector-ref dat 1) #f)))
(if (vector? conninfo)(http-transport:server-dat-update-last-access conninfo)) ;; refresh access time
;; (print "case 9. conninfo=" conninfo " dat=" dat)
(if (and success res)
(if success
(case (remote-transport *runremote*)
((http) res)
(else
(debug:print 0 *default-log-port* "ERROR: transport " (remote-transport *runremote*) " is unknown")
(exit 1)))
(begin
(debug:print 0 *default-log-port* "WARNING: communication failed. Trying again, try num: " attemptnum)
(remote-conndat-set! *runremote* #f)
(server-url-set! *runremote* #f)
(remote-conndat-set! *runremote* #f)
(remote-server-url-set! *runremote* #f)
;; (print "case 9.1")
(tasks:start-and-wait-for-server (tasks:open-db) 0 15)
(rmt:send-receive cmd rid params attemptnum: (+ attemptnum 1)))))))))
(define (rmt:update-db-stats run-id rawcmd params duration)
(mutex-lock! *db-stats-mutex*)
(handle-exceptions
exn
|
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
|
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
|
-
-
-
-
-
-
|
(mutex-lock! *db-multi-sync-mutex*)
(set! *db-last-write* start-time) ;; the oldest "write"
(mutex-unlock! *db-multi-sync-mutex*)))))
res))
(define (rmt:send-receive-no-auto-client-setup connection-info cmd run-id params)
(let* ((run-id (if run-id run-id 0))
;; (jparams (db:obj->string params)) ;; (rmt:dat->json-str params))
;; ((commfail) (vector #f "communications fail")))))
;; (db:string->obj (vector-ref dat 1))
;; (begin
;; (debug:print-error 0 *default-log-port* "rmt:send-receive-no-auto-client-setup failed, attempting to continue. Got " dat)
;; dat))))
|