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;; now get the actual message
(let ((myres (db:string->obj (receive-message* sub-socket))))
(if (equal? query-sig (vector-ref myres 1))
(set! res (vector-ref myres 2))
(loop))))))
(timeout (lambda ()
(let loop ((n numretries))
(thread-sleep! 20)
(if (not res)
(if (> numretries 0)
(begin
(debug:print 0 "WARNING: no reply to query " params ", trying resend")
(debug:print-info 11 "re-sending message")
(send-message push-socket zdat)
(debug:print-info 11 "message re-sent")
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;; now get the actual message
(let ((myres (db:string->obj (receive-message* sub-socket))))
(if (equal? query-sig (vector-ref myres 1))
(set! res (vector-ref myres 2))
(loop))))))
(timeout (lambda ()
(let loop ((n numretries))
(thread-sleep! 60)
(if (not res)
(if (> numretries 0)
(begin
(debug:print 0 "WARNING: no reply to query " params ", trying resend")
(debug:print-info 11 "re-sending message")
(send-message push-socket zdat)
(debug:print-info 11 "message re-sent")
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;; The queue is a list of vectors where the zeroth slot indicates the type of query to
;; apply and the second slot is the time of the query and the third entry is a list of
;; values to be applied
;;
(define (db:process-queue pubsock indata)
(open-run-close
(lambda (db . junkparams)
(let ((queries (make-hash-table))
(data (sort indata (lambda (a b)
(< (cdb:packet-get-qtime a)(cdb:packet-get-qtime b))))))
(if (> (length data) 0)
(debug:print-info 4 "Writing cached data " data))
;; prepare the needed statements, do each only once
(for-each (lambda (request-item)
(let ((stmt-key (cdb:packet-get-qtype request-item)))
(debug:print-info 11 "stmt-key=" stmt-key ", request-item=" request-item)
(if (not (hash-table-ref/default queries stmt-key #f))
(let ((stmt (alist-ref stmt-key db:queries)))
(debug:print-info 11 "stmt-key=" stmt-key ", stmt=" stmt)
(if stmt
(hash-table-set! queries stmt-key (sqlite3:prepare db (car stmt)))
(if (procedure? stmt-key)
(hash-table-set! queries stmt-key #f)
(if (not (member stmt-key db:special-queries))
(debug:print 0 "ERROR: Missing query spec for " stmt-key "!"))))))))
data)
;; outer loop to handle special queries that cannot be handled in the
;; transaction.
(let outerloop ((special-qry #f)
(stmts data))
(debug:print-info 11 "special-qry=" special-qry ", stmts=" stmts)
(if special-qry
;; handle a query that cannot be part of the grouped queries
(let* ((stmt-key (cdb:packet-get-qtype special-qry))
(qry-sig (cdb:packet-get-query-sig special-qry))
(return-address (cdb:packet-get-client-sig special-qry))
(qry (hash-table-ref/default queries stmt-key #f))
(params (cdb:packet-get-params special-qry)))
(debug:print-info 11 "Special queries/requests stmt-key=" stmt-key ", return-address=" return-address ", qry=" qry ", params=" params)
(cond
;; Special queries
((string? qry)
(apply sqlite3:execute db qry params)
(server:reply pubsock return-address qry-sig #t #t))
;; ((and (not (null? params))
;; (procedure? (car params)))
;; (let ((proc (car params))
;; (remparams (cdr params)))
;; ;; we are being handed a procedure so call it
;; (debug:print-info 11 "Running (apply " proc " " db " " remparams ")")
;; (server:reply pubsock return-address (apply proc db remparams))))
(else
(case stmt-key
((immediate)
(let ((proc (car params))
(remparams (cdr params)))
;; we are being handed a procedure so call it
(debug:print-info 11 "Running (apply " proc " " remparams ")")
(server:reply pubsock return-address qry-sig #t (apply proc remparams))))
((login)
(if (< (length params) 3) ;; should get toppath, version and signature
'(#f "login failed due to missing params") ;; missing params
(let ((calling-path (car params))
(calling-vers (cadr params))
(client-key (caddr params)))
(if (and (equal? calling-path *toppath*)
(equal? megatest-version calling-vers))
(begin
(hash-table-set! *logged-in-clients* client-key (current-seconds))
(server:reply pubsock return-address qry-sig #t '(#t "successful login"))) ;; path matches - pass! Should vet the caller at this time ...
(list #f (conc "Login failed due to mismatch paths: " calling-path ", " *toppath*))))))
((flush sync)
(server:reply pubsock return-address qry-sig #t (length data)))
((set-verbosity)
(set! *verbosity* (car params))
(server:reply pubsock return-address qry-sig #t '(#t *verbosity*)))
((killserver)
(debug:print 0 "WARNING: Server going down in 15 seconds by user request!")
(open-run-close tasks:server-deregister tasks:open-db
(cadr *server-info*)
pullport: (caddr *server-info*))
(thread-start! (make-thread (lambda ()(thread-sleep! 15)(exit))))
(server:reply pubsock return-address qry-sig #t '(#t "exit process started")))
(else
(debug:print 0 "ERROR: Unrecognised queued call " qry " " params)
(server:reply pubsock return-address qry-sig #f #t)))))
(if (not (null? stmts))
(outerloop #f stmts)))
;; handle normal queries
(let ((rem (sqlite3:with-transaction
db
(lambda ()
(debug:print-info 11 "flushing " stmts " to db")
(if (null? stmts)
stmts
(let innerloop ((hed (car stmts))
(tal (cdr stmts)))
(let ((params (cdb:packet-get-params hed))
(return-address (cdb:packet-get-client-sig hed))
(qry-sig (cdb:packet-get-query-sig hed))
(stmt-key (cdb:packet-get-qtype hed)))
(if (or (not (hash-table-ref/default queries stmt-key #f))
(member stmt-key db:special-queries))
(begin
(debug:print-info 11 "Handling special statement " stmt-key)
(cons hed tal))
(begin
(debug:print-info 11 "Executing " stmt-key " for " params)
(apply sqlite3:execute (hash-table-ref queries stmt-key) params)
(server:reply pubsock return-address qry-sig #t #t)
(if (not (null? tal))
(innerloop (car tal)(cdr tal))
'()))
))))))))
(if (not (null? rem))
(outerloop (car rem)(cdr rem))))))
(for-each (lambda (stmt-key)
(sqlite3:finalize! (hash-table-ref queries stmt-key)))
(hash-table-keys queries))
(let ((cache-size (length data)))
(if (> cache-size *max-cache-size*)
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;; The queue is a list of vectors where the zeroth slot indicates the type of query to
;; apply and the second slot is the time of the query and the third entry is a list of
;; values to be applied
;;
(define (db:process-queue pubsock indata)
(open-run-close
(lambda (db . junkparams)
(let* ((queries (make-hash-table))
(data (sort indata (lambda (a b)
(< (cdb:packet-get-qtime a)(cdb:packet-get-qtime b))))))
(for-each
(lambda (special-qry)
(let* ((stmt-key (cdb:packet-get-qtype special-qry))
(qry-sig (cdb:packet-get-query-sig special-qry))
(return-address (cdb:packet-get-client-sig special-qry))
(qry (hash-table-ref/default queries stmt-key #f))
(params (cdb:packet-get-params special-qry)))
(debug:print-info 11 "Special queries/requests stmt-key=" stmt-key ", return-address=" return-address ", qry=" qry ", params=" params)
(cond
;; Special queries
((string? qry)
(apply sqlite3:execute db qry params)
(server:reply pubsock return-address qry-sig #t #t))
;; ((and (not (null? params))
;; (procedure? (car params)))
;; (let ((proc (car params))
;; (remparams (cdr params)))
;; ;; we are being handed a procedure so call it
;; (debug:print-info 11 "Running (apply " proc " " db " " remparams ")")
;; (server:reply pubsock return-address (apply proc db remparams))))
(else
(case stmt-key
((immediate)
(let ((proc (car params))
(remparams (cdr params)))
;; we are being handed a procedure so call it
(debug:print-info 11 "Running (apply " proc " " remparams ")")
(server:reply pubsock return-address qry-sig #t (apply proc remparams))))
((login)
(if (< (length params) 3) ;; should get toppath, version and signature
'(#f "login failed due to missing params") ;; missing params
(let ((calling-path (car params))
(calling-vers (cadr params))
(client-key (caddr params)))
(if (and (equal? calling-path *toppath*)
(equal? megatest-version calling-vers))
(begin
(hash-table-set! *logged-in-clients* client-key (current-seconds))
(server:reply pubsock return-address qry-sig #t '(#t "successful login"))) ;; path matches - pass! Should vet the caller at this time ...
(list #f (conc "Login failed due to mismatch paths: " calling-path ", " *toppath*))))))
((flush sync)
(server:reply pubsock return-address qry-sig #t (length data)))
((set-verbosity)
(set! *verbosity* (car params))
(server:reply pubsock return-address qry-sig #t '(#t *verbosity*)))
((killserver)
(debug:print 0 "WARNING: Server going down in 15 seconds by user request!")
(open-run-close tasks:server-deregister tasks:open-db
(cadr *server-info*)
pullport: (caddr *server-info*))
(thread-start! (make-thread (lambda ()(thread-sleep! 15)(exit))))
(server:reply pubsock return-address qry-sig #t '(#t "exit process started")))
(let ((params (cdb:packet-get-params hed))
(return-address (cdb:packet-get-client-sig hed))
(qry-sig (cdb:packet-get-query-sig hed))
(stmt-key (cdb:packet-get-qtype hed)))
(if (or (not (hash-table-ref/default queries stmt-key #f))
(member stmt-key db:special-queries))
(begin
(debug:print-info 11 "Handling special statement " stmt-key)
(cons hed tal))
(begin
(debug:print-info 11 "Executing " stmt-key " for " params)
(apply sqlite3:execute (hash-table-ref queries stmt-key) params)
(server:reply pubsock return-address qry-sig #t #t)
(if (not (null? tal))
(innerloop (car tal)(cdr tal))
'()))
))))))))
(else
(debug:print 0 "ERROR: Unrecognised queued call " qry " " params)
(server:reply pubsock return-address qry-sig #f #t))
(if (not (null? rem))
(outerloop (car rem)(cdr rem))))))
(for-each (lambda (stmt-key)
(sqlite3:finalize! (hash-table-ref queries stmt-key)))
(hash-table-keys queries))
(let ((cache-size (length data)))
(if (> cache-size *max-cache-size*)
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