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;; else return #f to let the calling proc know that there is no server available
;;
(define (rmt:get-connection-info areapath) ;; TODO: push areapath down.
(let ((cinfo (remote-conndat *runremote*))
(run-id 0))
(if cinfo
cinfo
(if (tasks:server-running-or-starting? (db:delay-if-busy (tasks:open-db)) run-id)
(client:setup run-id)
(if (server:check-if-running areapath)
(client:setup areapath)
#f))))
(define *send-receive-mutex* (make-mutex)) ;; should have separate mutex per run-id
;; RA => e.g. usage (rmt:send-receive 'get-var #f (list varname))
;;
(define (rmt:send-receive cmd rid params #!key (attemptnum 1)) ;; start attemptnum at 1 so the modulo below works as expected
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(debug:print-info 12 *default-log-port* "rmt:send-receive, case 3")
(rmt:open-qry-close-locally cmd 0 params))
;; on homehost and this is a write, we already have a server, but server has died
((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
(not (server:read-dotserver *toppath*))) ;; server has died.
(set! *runremote* #f)
(not (server:check-if-running *toppath*))) ;; server has died.
(set! *runremote* (make-remote))
(mutex-unlock! *rmt-mutex*)
(debug:print-info 12 *default-log-port* "rmt:send-receive, case 4.1")
(rmt:send-receive cmd rid params attemptnum: attemptnum))
;; 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*)
(debug:print-info 12 *default-log-port* "rmt:send-receive, case 4")
(rmt:open-qry-close-locally cmd 0 params))
;; commented by bb; this was blocking server passive start on write on homehost (case 5)
;; ;; on homehost and this is a write, we have a server (we know because case 4 checked)
;; ((and (cdr (remote-hh-dat *runremote*)) ;; on homehost
;; (not (member cmd api:read-only-queries)))
;; (mutex-unlock! *rmt-mutex*)
;; (debug:print-info 12 *default-log-port* "rmt:send-receive, case 4.1")
;; (rmt:open-qry-close-locally cmd 0 params))
(let ((server-url (server:read-dotserver->url *toppath*))) ;; (server:check-if-running *toppath*))) ;; Do NOT want to run server:check-if-running - very expensive to do for every write call
(let ((server-url (server:check-if-running *toppath*))) ;; (server:read-dotserver->url *toppath*))) ;; (server:check-if-running *toppath*))) ;; Do NOT want to run server:check-if-running - very expensive to do for every write call
(if server-url
(remote-server-url-set! *runremote* server-url) ;; the string can be consumed by the client setup if needed
(if (not (server:start-attempted? *toppath*))
(server:kind-run *toppath*))))
(mutex-unlock! *rmt-mutex*)
(debug:print-info 12 *default-log-port* "rmt:send-receive, case 5.1")
(rmt:open-qry-close-locally cmd 0 params))
;;;
;; (begin ;; not on homehost, start server and wait
;; (mutex-unlock! *rmt-mutex*)
;; (debug:print-info 12 *default-log-port* "rmt:send-receive, case 5.2")
;; (tasks:start-and-wait-for-server (tasks:open-db) 0 15)
;; (rmt:send-receive cmd rid params attemptnum: attemptnum)) ;) ;)
;;;;
;; if not on homehost ensure we have a connection to a live server
;; NOTE: we *have* a homehost record by now
;; ((and (not (cdr (remote-hh-dat *runremote*))) ;; not on a homehost
;; (not (remote-conndat *runremote*)) ;; and no connection
;; (server:read-dotserver *toppath*)) ;; .server file exists
;; ;; something caused the server entry in tdb to disappear, but the server is still running
;; (server:remove-dotserver-file *toppath* ".*")
;; (mutex-unlock! *rmt-mutex*)
;; (debug:print-info 12 *default-log-port* "rmt:send-receive, case 20")
;; (rmt:send-receive cmd rid params attemptnum: (add1 attemptnum)))
(tasks:start-and-wait-for-server (tasks:open-db) 0 15)
(server:start-and-wait *toppath*)
(remote-conndat-set! *runremote* (rmt:get-connection-info *toppath*)) ;; calls client:setup which calls client:setup-http
(rmt:send-receive cmd rid params attemptnum: attemptnum)) ;; TODO: add back-off timeout as
;; all set up if get this far, dispatch the query
((cdr (remote-hh-dat *runremote*)) ;; we are on homehost
(mutex-unlock! *rmt-mutex*)
(debug:print-info 12 *default-log-port* "rmt:send-receive, case 7")
(rmt:open-qry-close-locally cmd (if rid rid 0) params))
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(exit 1)))
(begin
(debug:print 0 *default-log-port* "WARNING: communication failed. Trying again, try num: " attemptnum)
(remote-conndat-set! *runremote* #f)
(remote-server-url-set! *runremote* #f)
(debug:print-info 12 *default-log-port* "rmt:send-receive, case 9.1")
(mutex-unlock! *rmt-mutex*)
(tasks:start-and-wait-for-server (tasks:open-db) 0 15)
(server:start-and-wait *toppath*)
(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
;; (begin
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