Megatest

# make install CSCOPTS='-accumulate-profile -profile-name $(PWD)/profile-ww$(shell date +%V.%u)'
PREFIX=$(PWD)
CSCOPTS= 
INSTALL=install
SRCFILES = common.scm items.scm launch.scm \
           ods.scm runconfig.scm server.scm configf.scm \
           db.scm keys.scm margs.scm megatest-version.scm \
           process.scm runs.scm tasks.scm tests.scm genexample.scm \
	   http-transport.scm filedb.scm \
	   http-transport.scm nmsg-transport.scm filedb.scm \
           client.scm gutils.scm synchash.scm daemon.scm mt.scm dcommon.scm \
	   tree.scm ezsteps.scm lock-queue.scm sdb.scm \
	   rmt.scm api.scm tdb.scm portlogger.scm
	   rmt.scm api.scm tdb.scm rpc-transport.scm \
	   portlogger.scm

# Eggs to install (straightforward ones)
EGGS=matchable readline apropos base64 regex-literals format regex-case test coops trace csv \
     dot-locking posix-utils posix-extras directory-utils hostinfo tcp-server rpc csv-xml fmt \
     json md5 awful http-client spiffy uri-common intarweb spiffy-request-vars \
     spiffy-directory-listing ssax sxml-serializer sxml-modifications iup canvas-draw sqlite3

# Special dependencies for the includes
tests.o db.o launch.o runs.o dashboard-tests.o dashboard-guimonitor.o dashboard-main.o monitor.o dashboard.o megatest.o : db_records.scm
tests.o runs.o dashboard.o dashboard-tests.o dashboard-main.o  : run_records.scm
db.o ezsteps.o keys.o launch.o megatest.o monitor.o runs-for-ref.o runs.o tests.o : key_records.scm
tests.o tasks.o dashboard-tasks.o : task_records.scm
runs.o : test_records.scm
megatest.o : megatest-fossil-hash.scm
client.scm common.scm configf.scm dashboard-guimonitor.scm dashboard-tests.scm dashboard.scm db.scm dcommon.scm ezsteps.scm fs-transport.scm http-transport.scm index-tree.scm items.scm keys.scm launch.scm megatest.scm monitor.scm mt.scm newdashboard.scm runconfig.scm runs.scm server.scm tdb.scm tests.scm tree.scm zmq-transport.scm : common_records.scm
client.scm common.scm configf.scm dashboard-guimonitor.scm dashboard-tests.scm dashboard.scm db.scm dcommon.scm ezsteps.scm fs-transport.scm http-transport.scm index-tree.scm items.scm keys.scm launch.scm megatest.scm monitor.scm mt.scm newdashboard.scm runconfig.scm runs.scm server.scm tdb.scm tests.scm tree.scm zmq-transport.scm : common_records.scm rpc-transport.scm

# Temporary while transitioning to new routine
# runs.o : run-tests-queue-classic.scm  run-tests-queue-new.scm

megatest-fossil-hash.scm : $(SRCFILES) megatest.scm *_records.scm
	echo "(define megatest-fossil-hash \"$(MTESTHASH)\")" > megatest-fossil-hash.new
	if ! diff -q megatest-fossil-hash.new megatest-fossil-hash.scm ; then echo copying .new to .scm;cp -f megatest-fossil-hash.new megatest-fossil-hash.scm;fi

;;  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
;;  PURPOSE.
;;======================================================================

(declare (unit api))
(declare (uses rmt))
(declare (uses db))
(declare (uses tasks))

;; allow these queries through without starting a server
;;
(define api:read-only-queries
  '(get-key-val-pairs
    get-keys
    test-toplevel-num-items

    get-steps-data
    login
    testmeta-get-record))

;; These are called by the server on recipt of /api calls
;;    - keep it simple, only return the actual result of the call, i.e. no meta info here
;;
;;    - returns #( flag result )
;;
(define (api:execute-requests dbstruct cmd params)
  (case (string->symbol cmd)
    ;; SERVERS
    ((start-server)                 (apply server:kind-run params))
    ((kill-server)                  (set! *server-run* #f))

    ;; KEYS
    ((get-key-val-pairs)            (apply db:get-key-val-pairs dbstruct params))
    ((get-keys)                     (db:get-keys dbstruct))
(define (api:execute-requests dbstruct dat)
  (handle-exceptions
   exn
   (let ((call-chain (get-call-chain)))
     (print-call-chain (current-error-port))
     (debug:print 0 " message: " ((condition-property-accessor 'exn 'message) exn))       
     (vector #f (vector exn call-chain dat))) ;; return some stuff for debug if an exception happens
   (if (not (vector? dat))                    ;; it is an error to not receive a vector
       (vector #f #f "remote must be called with a vector")       
       (vector                                   ;; return a vector + the returned data structure
	#t 
	(let ((cmd    (vector-ref dat 0))
	      (params (vector-ref dat 1)))
	  (case (if (symbol? cmd)
		    cmd
		    (string->symbol cmd))
	    ;; SERVERS
	    ((start-server)                 (apply server:kind-run params))
	    ((kill-server)                  (set! *server-run* #f))
	    
	    ;; KEYS
	    ((get-key-val-pairs)            (apply db:get-key-val-pairs dbstruct params))
	    ((get-keys)                     (db:get-keys dbstruct))

    ;; TESTS
    ((test-toplevel-num-items)         (apply db:test-toplevel-num-items dbstruct params))
    ((get-test-info-by-id)	       (apply db:get-test-info-by-id dbstruct params))
    ((test-get-rundir-from-test-id)    (apply db:test-get-rundir-from-test-id dbstruct params))
    ((test-set-state-status-by-id)     (apply db:test-set-state-status-by-id dbstruct params))
    ((get-count-tests-running)         (apply db:get-count-tests-running dbstruct params))
    ((get-count-tests-running-in-jobgroup) (apply db:get-count-tests-running-in-jobgroup dbstruct params))
    ((delete-test-records)             (apply db:delete-test-records dbstruct params))
    ;; ((delete-test-step-records)        (apply db:delete-test-step-records dbstruct params))
    ((delete-old-deleted-test-records) (apply db:delete-old-deleted-test-records dbstruct params))
    ((test-set-status-state)           (apply db:test-set-status-state dbstruct params))
    ((get-previous-test-run-record)    (apply db:get-previous-test-run-record dbstruct params))
    ((get-matching-previous-test-run-records)(apply db:get-matching-previous-test-run-records dbstruct params))
    ((test-get-logfile-info)           (apply db:test-get-logfile-info dbstruct params))
    ((test-get-records-for-index-file)  (apply db:test-get-records-for-index-file dbstruct params))
    ((get-testinfo-state-status)       (apply db:get-testinfo-state-status dbstruct params))
    ((test-set-top-process-pid)        (apply db:test-set-top-process-pid dbstruct params))
    ((test-get-top-process-pid)        (apply db:test-get-top-process-pid dbstruct params))
    ((test-get-paths-matching-keynames-target-new) (apply db:test-get-paths-matching-keynames-target-new dbstruct params))
    ((get-prereqs-not-met)             (apply db:get-prereqs-not-met dbstruct params))
    ((roll-up-pass-fail-counts)        (apply db:roll-up-pass-fail-counts dbstruct params))
    ((update-fail-pass-counts)         (apply db:general-call dbstruct 'update-pass-fail-counts params))
    ((get-count-tests-running-for-run-id) (apply db:get-count-tests-running-for-run-id dbstruct params))
	    ;; TESTS
	    ((test-toplevel-num-items)         (apply db:test-toplevel-num-items dbstruct params))
	    ((get-test-info-by-id)	       (apply db:get-test-info-by-id dbstruct params))
	    ((test-get-rundir-from-test-id)    (apply db:test-get-rundir-from-test-id dbstruct params))
	    ((test-set-state-status-by-id)     (apply db:test-set-state-status-by-id dbstruct params))
	    ((get-count-tests-running)         (apply db:get-count-tests-running dbstruct params))
	    ((get-count-tests-running-in-jobgroup) (apply db:get-count-tests-running-in-jobgroup dbstruct params))
	    ((delete-test-records)             (apply db:delete-test-records dbstruct params))
	    ;; ((delete-test-step-records)        (apply db:delete-test-step-records dbstruct params))
	    ((delete-old-deleted-test-records) (apply db:delete-old-deleted-test-records dbstruct params))
	    ((test-set-status-state)           (apply db:test-set-status-state dbstruct params))
	    ((get-previous-test-run-record)    (apply db:get-previous-test-run-record dbstruct params))
	    ((get-matching-previous-test-run-records)(apply db:get-matching-previous-test-run-records dbstruct params))
	    ((test-get-logfile-info)           (apply db:test-get-logfile-info dbstruct params))
	    ((test-get-records-for-index-file)  (apply db:test-get-records-for-index-file dbstruct params))
	    ((get-testinfo-state-status)       (apply db:get-testinfo-state-status dbstruct params))
	    ((test-set-top-process-pid)        (apply db:test-set-top-process-pid dbstruct params))
	    ((test-get-top-process-pid)        (apply db:test-get-top-process-pid dbstruct params))
	    ((test-get-paths-matching-keynames-target-new) (apply db:test-get-paths-matching-keynames-target-new dbstruct params))
	    ((get-prereqs-not-met)             (apply db:get-prereqs-not-met dbstruct params))
	    ((roll-up-pass-fail-counts)        (apply db:roll-up-pass-fail-counts dbstruct params))
	    ((update-fail-pass-counts)         (apply db:general-call dbstruct 'update-pass-fail-counts params))
	    ((get-count-tests-running-for-run-id) (apply db:get-count-tests-running-for-run-id dbstruct params))

    ;; RUNS
    ((get-run-info)                 (apply db:get-run-info dbstruct params))
    ((get-run-status)               (apply db:get-run-status dbstruct params))
    ((set-run-status)               (apply db:set-run-status dbstruct params))
    ((register-run)                 (apply db:register-run dbstruct params))
    ((set-tests-state-status)       (apply db:set-tests-state-status dbstruct params))
    ((get-tests-for-run)            (apply db:get-tests-for-run dbstruct params))
    ((get-test-id)                  (apply db:get-test-id dbstruct params))
	    ;; RUNS
	    ((get-run-info)                 (apply db:get-run-info dbstruct params))
	    ((get-run-status)               (apply db:get-run-status dbstruct params))
	    ((set-run-status)               (apply db:set-run-status dbstruct params))
	    ((register-run)                 (apply db:register-run dbstruct params))
	    ((set-tests-state-status)       (apply db:set-tests-state-status dbstruct params))
	    ((get-tests-for-run)            (apply db:get-tests-for-run dbstruct params))
	    ((get-test-id)                  (apply db:get-test-id dbstruct params))
	    ((get-tests-for-run-mindata)    (apply db:get-tests-for-run-mindata dbstruct params))
    ((get-run-name-from-id)         (apply db:get-run-name-from-id dbstruct params))
    ((delete-run)                   (apply db:delete-run dbstruct params))
    ((get-runs)                     (apply db:get-runs dbstruct params))
    ((get-all-run-ids)              (db:get-all-run-ids dbstruct))
    ((get-prev-run-ids)             (apply db:get-prev-run-ids dbstruct params))
    ((get-run-ids-matching-target)  (apply db:get-run-ids-matching-target dbstruct params))
    ((get-runs-by-patt)             (apply db:get-runs-by-patt dbstruct params))
    ((lock/unlock-run)              (apply db:lock/unlock-run dbstruct params))
    ((update-run-event_time)        (apply db:update-run-event_time dbstruct params))
    ((find-and-mark-incomplete)     (apply db:find-and-mark-incomplete dbstruct params))
	    ((get-run-name-from-id)         (apply db:get-run-name-from-id dbstruct params))
	    ((delete-run)                   (apply db:delete-run dbstruct params))
	    ((get-runs)                     (apply db:get-runs dbstruct params))
	    ((get-all-run-ids)              (db:get-all-run-ids dbstruct))
	    ((get-prev-run-ids)             (apply db:get-prev-run-ids dbstruct params))
	    ((get-run-ids-matching-target)  (apply db:get-run-ids-matching-target dbstruct params))
	    ((get-runs-by-patt)             (apply db:get-runs-by-patt dbstruct params))
	    ((lock/unlock-run)              (apply db:lock/unlock-run dbstruct params))
	    ((update-run-event_time)        (apply db:update-run-event_time dbstruct params))
	    ((find-and-mark-incomplete)     (apply db:find-and-mark-incomplete dbstruct params))

    ;; STEPS
    ((teststep-set-status!)         (apply db:teststep-set-status! dbstruct params))
	    ;; STEPS
	    ((teststep-set-status!)         (apply db:teststep-set-status! dbstruct params))

    ;; TEST DATA
    ((test-data-rollup)             (apply db:test-data-rollup dbstruct params))
    ((csv->test-data)               (apply db:csv->test-data dbstruct params))
    ((get-steps-data)               (apply db:get-steps-data dbstruct params))
	    ;; TEST DATA
	    ((test-data-rollup)             (apply db:test-data-rollup dbstruct params))
	    ((csv->test-data)               (apply db:csv->test-data dbstruct params))
	    ((get-steps-data)               (apply db:get-steps-data dbstruct params))

    ;; MISC
    ((login)                        (apply db:login dbstruct params))
    ((general-call)                 (let ((stmtname   (car params))
					  (run-id     (cadr params))
					  (realparams (cddr params)))
				      (db:with-db dbstruct run-id #t ;; these are all for modifying the db
						  (lambda (db)
						    (db:general-call db stmtname realparams)))))
    ((sync-inmem->db)               (db:sync-touched dbstruct run-id force-sync: #t))
    ((sdb-qry)                      (apply sdb:qry params))
	    ;; MISC
	    ((login)                        (apply db:login dbstruct params))
	    ((general-call)                 (let ((stmtname   (car params))
						  (run-id     (cadr params))
						  (realparams (cddr params)))
					      (db:with-db dbstruct run-id #t ;; these are all for modifying the db
							  (lambda (db)
							    (db:general-call db stmtname realparams)))))
	    ((sync-inmem->db)               (let ((run-id (car params)))
					      (db:sync-touched dbstruct run-id force-sync: #t)))
	    ((sdb-qry)                      (apply sdb:qry params))
	    ((ping)                         (current-process-id))

    ;; TESTMETA
    ((testmeta-get-record)       (apply db:testmeta-get-record dbstruct params))
    ((testmeta-add-record)       (apply db:testmeta-add-record dbstruct params))
    ((testmeta-update-field)     (apply db:testmeta-update-field dbstruct params))
    (else
     (list "ERROR" 0))))
	    ;; TESTMETA
	    ((testmeta-get-record)       (apply db:testmeta-get-record dbstruct params))
	    ((testmeta-add-record)       (apply db:testmeta-add-record dbstruct params))
	    ((testmeta-update-field)     (apply db:testmeta-update-field dbstruct params))

	    ;; TASKS 
	    ((find-task-queue-records)   (apply tasks:find-task-queue-records dbstruct params))
	    ((tasks-add)                 (apply tasks:add dbstruct params))   
	    ((tasks-set-state-given-param-key) (apply tasks:set-state-given-param-key dbstruct params))))))))


;; http-server  send-response
;;                 api:process-request
;;                    db:*
;;
;; NB// Runs on the server as part of the server loop
;;
(define (api:process-request dbstruct $) ;; the $ is the request vars proc
  (let* ((cmd     ($ 'cmd))
	 (paramsj ($ 'params))
	 (params  (db:string->obj paramsj)) ;; (rmt:json-str->dat paramsj))
	 (res     (api:execute-requests dbstruct cmd params)))
	 (params  (db:string->obj paramsj transport: 'http)) ;; (rmt:json-str->dat paramsj))
	 (resdat  (api:execute-requests dbstruct (vector cmd params))) ;; #( flag result )
	 (res     (vector-ref resdat 1)))

    ;; This can be here but needs controls to ensure it doesn't run more than every 4 seconds
    ;; (rmt:dat->json-str
    ;;  (if (or (string? res)
    ;;          (list?   res)
    ;;          (number? res)
    ;;          (boolean? res))
    ;;      res 
    ;;      (list "ERROR, not string, list, number or boolean" 1 cmd params res)))))
    (db:obj->string res)))
    (db:obj->string res transport: 'http)))

;; Not currently used! But, I think it *should* be used!!!
(define (client:logout serverdat)
  (let ((ok (and (socket? serverdat)
		 (cdb:logout serverdat *toppath* (client:get-signature)))))
    ok))

(define (client:connect iface port)
  (case (server:get-transport)
    ((rpc)  (rpc:client-connect  iface port))
    ((http) (http:client-connect iface port))
    ((zmq)  (zmq:client-connect  iface port))
    (else   (rpc:client-connect  iface port))))

(define (client:login-no-auto-setup server-info run-id)
  (case (server:get-transport)
    ((rpc)  (rpc:login-no-auto-client-setup server-info run-id))
    ((http) (rmt:login-no-auto-client-setup server-info run-id))
    (else   (rpc:login-no-auto-client-setup server-info run-id))))

(define (client:setup  run-id #!key (remaining-tries 10) (failed-connects 0))
  (case (server:get-transport)
    ((rpc) (rpc-transport:client-setup run-id)) ;;(client:setup-rpc run-id))
    ((http)(client:setup-http run-id))
    (else  (rpc-transport:client-setup run-id)))) ;; (client:setup-rpc run-id))))

;; (define (client:setup-rpc run-id)
;;   (debug:print 0 "INFO: client:setup remaining-tries=" remaining-tries)
;;   (if (<= remaining-tries 0)
;;       (begin
;; 	(debug:print 0 "ERROR: failed to start or connect to server for run-id " run-id)
;; 	(exit 1))
;;       (let ((host-info (hash-table-ref/default *runremote* run-id #f)))
;; 	(debug:print-info 0 "client:setup host-info=" host-info ", remaining-tries=" remaining-tries)
;; 	(if host-info
;; 	    (let* ((iface     (car  host-info))
;; 		   (port      (cadr host-info))
;; 		   (start-res (client:connect iface port))
;; 		   ;; (ping-res  (server:ping-server run-id iface port))
;; 		   (ping-res  (client:login-no-auto-setup start-res run-id)))
;; 	      (if ping-res   ;; sucessful login?
;; 		  (begin
;; 		    (hash-table-set! *runremote* run-id start-res)
;; 		    start-res)  ;; return the server info
;; 		  (if (member remaining-tries '(3 4 6))
;; 		      (begin    ;; login failed
;; 			(debug:print 25 "INFO: client:setup start-res=" start-res ", run-id=" run-id ", server-dat=" host-info)
;; 			(hash-table-delete! *runremote* run-id)
;; 			(open-run-close tasks:server-force-clean-run-record
;; 			 		tasks:open-db
;; 			 		run-id 
;; 			 		(car  host-info)
;; 			 		(cadr host-info)
;; 					" client:setup (host-info=#t)")
;; 			(thread-sleep! 5)
;; 			(client:setup run-id remaining-tries: 10)) ;; (- remaining-tries 1)))
;; 		      (begin
;; 			(debug:print 25 "INFO: client:setup failed to connect, start-res=" start-res ", run-id=" run-id ", host-info=" host-info)
;; 			(thread-sleep! 5)
;; 			(client:setup run-id remaining-tries: (- remaining-tries 1))))))
;; 	    ;; YUK: rename server-dat here
;; 	    (let* ((server-dat (open-run-close tasks:get-server tasks:open-db run-id)))
;; 	      (debug:print-info 0 "client:setup server-dat=" server-dat ", remaining-tries=" remaining-tries)
;; 	      (if server-dat
;; 		  (let* ((iface     (tasks:hostinfo-get-interface server-dat))
;; 			 (port      (tasks:hostinfo-get-port      server-dat))
;; 			 (start-res (http-transport:client-connect iface port))
;; 			 ;; (ping-res  (server:ping-server run-id iface port))
;; 			 (ping-res  (rmt:login-no-auto-client-setup start-res run-id)))
;; 		    (if start-res
;; 			(begin
;; 			  (hash-table-set! *runremote* run-id start-res)
;; 			  start-res)
;; 			(if (member remaining-tries '(2 5))
;; 			    (begin    ;; login failed
;; 			      (debug:print 25 "INFO: client:setup start-res=" start-res ", run-id=" run-id ", server-dat=" server-dat)
;; 			      (hash-table-delete! *runremote* run-id)
;; 			      (open-run-close tasks:server-force-clean-run-record
;; 					      tasks:open-db
;; 					      run-id 
;; 					      (tasks:hostinfo-get-interface server-dat)
;; 					      (tasks:hostinfo-get-port      server-dat)
;; 					      " client:setup (server-dat = #t)")
;; 			      (thread-sleep! 2)
;; 			      (server:try-running run-id)
;; 			      (thread-sleep! 10) ;; give server a little time to start up
;; 			      (client:setup run-id remaining-tries: 10)) ;; (- remaining-tries 1)))
;; 			    (begin
;; 			      (debug:print 25 "INFO: client:setup start-res=" start-res ", run-id=" run-id ", server-dat=" server-dat)
;; 			      (thread-sleep! 5)
;; 			      (client:setup run-id remaining-tries: (- remaining-tries 1))))))
;; 		  (begin    ;; no server registered
;; 		    (if (eq? remaining-tries 2)
;; 			(begin
;; 			  ;; (open-run-close tasks:server-clean-out-old-records-for-run-id tasks:open-db run-id " client:setup (server-dat=#f)")
;; 			  (client:setup run-id remaining-tries: 10))
;; 			(begin
;; 			  (thread-sleep! 2) 
;; 			  (debug:print 25 "INFO: client:setup start-res (not defined here), run-id=" run-id ", server-dat=" server-dat)
;; 			  (if (< (open-run-close tasks:num-in-available-state tasks:open-db run-id) 3)
;; 			      (begin
;; 				;; (open-run-close tasks:server-clean-out-old-records-for-run-id tasks:open-db run-id " client:setup (server-dat=#f)")
;; 				(server:try-running run-id)))
;; 			  (thread-sleep! 10) ;; give server a little time to start up
;; 			  (client:setup run-id remaining-tries: (- remaining-tries 1)))))))))))

;; Do all the connection work, look up the transport type and set up the
;; connection if required.
;;
;; There are two scenarios. 
;;   1. We are a test manager and we received *transport-type* and *runremote* via cmdline
;;   2. We are a run tests, list runs or other interactive process and we must figure out
;;      *transport-type* and *runremote* from the monitor.db
;;
;; client:setup
;;
;; lookup_server, need to remove *runremote* stuff
;;
(define (client:setup run-id #!key (remaining-tries 100) (failed-connects 0))
(define (client:setup-http run-id #!key (remaining-tries 10) (failed-connects 0))
  (debug:print-info 2 "client:setup remaining-tries=" remaining-tries)
  (let* ((tdbdat (tasks:open-db)))
    (if (<= remaining-tries 0)
	(begin
	  (debug:print 0 "ERROR: failed to start or connect to server for run-id " run-id)
	  (exit 1))
	(let ((host-info (hash-table-ref/default *runremote* run-id #f)))
	  (if host-info
	      (let* ((iface     (http-transport:server-dat-get-iface host-info))
		     (port      (http-transport:server-dat-get-port  host-info))
		     (start-res (http-transport:client-connect iface port))
		     (ping-res  (rmt:login-no-auto-client-setup start-res run-id)))
		(if ping-res   ;; sucessful login?
		    (begin
		      (debug:print-info 2 "client:setup, ping is good using host-info=" host-info ", remaining-tries=" remaining-tries)
		      ;; Why add the close-connections here?
		      ;; (http-transport:close-connections run-id)
		      (hash-table-set! *runremote* run-id start-res)
		      start-res)  ;; return the server info
		    ;; have host info but no ping. shutdown the current connection and try again
		    (begin    ;; login failed
		      (debug:print-info 1 "client:setup, ping is bad for start-res=" start-res " and *runremote*=" host-info)
		      (http-transport:close-connections run-id)
		      (hash-table-delete! *runremote* run-id)
		      (if (< remaining-tries 8)
			  (thread-sleep! 5)
			  (thread-sleep! 1))
		      (client:setup run-id remaining-tries: (- remaining-tries 1)))))
	      ;; YUK: rename server-dat here
	      (let* ((server-dat (tasks:get-server (db:delay-if-busy tdbdat) run-id)))
		(debug:print-info 4 "client:setup server-dat=" server-dat ", remaining-tries=" remaining-tries)
		(if server-dat
		    (let* ((iface     (tasks:hostinfo-get-interface server-dat))
			   (port      (tasks:hostinfo-get-port      server-dat))
			   (start-res (http-transport:client-connect iface port))
			   (ping-res  (rmt:login-no-auto-client-setup start-res run-id)))
		      (if (and start-res
			       ping-res)
			  (begin
			    (hash-table-set! *runremote* run-id start-res)
			    (debug:print-info 2 "connected to " (http-transport:server-dat-make-url start-res))
			    start-res)
			  (begin    ;; login failed but have a server record, clean out the record and try again
			    (debug:print-info 0 "client:setup, login failed, will attempt to start server ... start-res=" start-res ", run-id=" run-id ", server-dat=" server-dat)
			    (http-transport:close-connections run-id)
			    (hash-table-delete! *runremote* run-id)
			    (tasks:server-force-clean-run-record (db:delay-if-busy tdbdat)
								 run-id 
								 (tasks:hostinfo-get-interface server-dat)
								 (tasks:hostinfo-get-port      server-dat)
								 " client:setup (server-dat = #t)")
			    (thread-sleep! 2)
			    (server:try-running run-id)
			    (thread-sleep! 10) ;; give server a little time to start up
			    (client:setup run-id remaining-tries: (- remaining-tries 1)))))
		    (begin    ;; no server registered
		      (let ((num-available (tasks:num-in-available-state (db:dbdat-get-db tdbdat) run-id)))
			(debug:print-info 0 "client:setup, no server registered, remaining-tries=" remaining-tries " num-available=" num-available)
	(let* ((server-dat (tasks:get-server (db:delay-if-busy tdbdat) run-id)))
	  (debug:print-info 4 "client:setup server-dat=" server-dat ", remaining-tries=" remaining-tries)
	  (if server-dat
	      (let* ((iface     (tasks:hostinfo-get-interface server-dat))
		     (hostname  (tasks:hostinfo-get-hostname  server-dat))
		     (port      (tasks:hostinfo-get-port      server-dat))
		     (start-res (case *transport-type*
				  ((http)(http-transport:client-connect iface port))
				  ((nmsg)(nmsg-transport:client-connect hostname port))))
		     (ping-res  (case *transport-type* 
				  ((http)(rmt:login-no-auto-client-setup start-res run-id))
				  ((nmsg)(let ((logininfo (rmt:login-no-auto-client-setup start-res run-id)))
 					   (if logininfo
 					       (car (vector-ref logininfo 1))
 					       #f))))))
		(if (and start-res
			 ping-res)
		    (begin
		      (hash-table-set! *runremote* run-id start-res)
		      (debug:print-info 2 "connected to " (http-transport:server-dat-make-url start-res))
		      start-res)
		    (begin    ;; login failed but have a server record, clean out the record and try again
		      (debug:print-info 0 "client:setup, login failed, will attempt to start server ... start-res=" start-res ", run-id=" run-id ", server-dat=" server-dat)
		      (case *transport-type* 
			((http)(http-transport:close-connections run-id)))
		      (hash-table-delete! *runremote* run-id)
		      (tasks:kill-server-run-id run-id)
		      (tasks:server-force-clean-run-record (db:delay-if-busy tdbdat)
							   run-id 
							   (tasks:hostinfo-get-interface server-dat)
							   (tasks:hostinfo-get-port      server-dat)
							   " client:setup (server-dat = #t)")
		      (if (> remaining-tries 8)
			  (thread-sleep! (+ 1 (random 5))) ;; spread out the starts a little
			  (thread-sleep! (+ 15 (random 20)))) ;; it isn't going well. give it plenty of time
		      (server:try-running run-id)
		      (thread-sleep! 5)   ;; give server a little time to start up
		      (client:setup run-id remaining-tries: (- remaining-tries 1))
		      )))
	      (begin    ;; no server registered
		(let ((num-available (tasks:num-in-available-state (db:dbdat-get-db tdbdat) run-id)))
		  (debug:print-info 0 "client:setup, no server registered, remaining-tries=" remaining-tries " num-available=" num-available)
			(thread-sleep! 2) 
			(if (< num-available 2)
		  (if (< num-available 2)
			    (begin
			      (server:try-running run-id)))
			(thread-sleep! 10) ;; give server a little time to start up
			(client:setup run-id remaining-tries: (- remaining-tries 1)))))))))))
		      (server:try-running run-id))
		  (thread-sleep! (+ 5 (random (- 20 remaining-tries))))  ;; give server a little time to start up, randomize a little to avoid start storms.
		  (client:setup run-id remaining-tries: (- remaining-tries 1)))))))))

;; 	(let ((host-info (hash-table-ref/default *runremote* run-id #f)))
;; 	  (if host-info ;; this is a bit circular. the host-info *is* the start-res FIXME
;; 	      (let* ((iface     (http-transport:server-dat-get-iface host-info))
;; 		     (port      (http-transport:server-dat-get-port  host-info))
;; 		     (start-res (case *transport-type* 
;; 				  ((http)(http-transport:client-connect iface port))
;; 				  ((nmsg)(nmsg-transport:client-connect iface port)) ;; (http-transport:server-dat-get-socket host-info))
;; 				  (else #f)))
;; 		     (ping-res  (case *transport-type*
;; 				  ((http)(rmt:login-no-auto-client-setup start-res run-id))
;; 				  ((nmsg)(let ((logininfo (rmt:login-no-auto-client-setup start-res run-id)))
;; 					   (if logininfo
;; 					       (vector-ref (vector-ref logininfo 1) 1)
;; 					       #f)))
;; 				  (else #f))))
;; 		(if ping-res   ;; sucessful login?
;; 		    (begin
;; 		      (debug:print-info 2 "client:setup, ping is good using host-info=" host-info ", remaining-tries=" remaining-tries)
;; 		      start-res)  ;; return the server info
;; 		    ;; have host info but no ping. shutdown the current connection and try again
;; 		    (begin    ;; login failed
;; 		      (debug:print-info 1 "client:setup, ping is bad for start-res=" start-res " and *runremote*=" host-info)
;; 		      (case *transport-type*
;; 			((http)(http-transport:close-connections run-id)))
;; 		      (hash-table-delete! *runremote* run-id)
;; 		      (if (< remaining-tries 8)
;; 			  (thread-sleep! 5)
;; 			  (thread-sleep! 1))
;; 		      (client:setup run-id remaining-tries: (- remaining-tries 1)))))
;; 	      ;; YUK: rename server-dat here
;; 

;; keep this as a function to ease future 
(define (client:start run-id server-info)
  (http-transport:client-connect (tasks:hostinfo-get-interface server-info)
				 (tasks:hostinfo-get-port server-info)))

;; client:signal-handler

(define *task-db*             #f) ;; (vector db path-to-db)
(define *db-access-allowed*   #t) ;; flag to allow access
(define *db-access-mutex*     (make-mutex))

;; SERVER
(define *my-client-signature* #f)
(define *transport-type*    'http)
(define *rpc:listener*      #f) ;; if set up for server communication this will hold the tcp port
(define *transport-type*    'http)             ;; override with [server] transport http|rpc|nmsg
(define *runremote*         (make-hash-table)) ;; if set up for server communication this will hold <host port>
(define *max-cache-size*    0)
(define *logged-in-clients* (make-hash-table))
(define *client-non-blocking-mode* #f)
(define *server-id*         #f)
(define *server-info*       #f)
(define *time-to-exit*      #f)

  (debug:print-info 2 "starting exit process, finalizing databases.")
  (rmt:print-db-stats)
  (let ((run-ids (hash-table-keys *db-local-sync*)))
    (if (and (not (null? run-ids))
	     (configf:lookup *configdat* "setup" "megatest-db"))
	(db:multi-db-sync run-ids 'new2old)))
  (if *dbstruct-db* (db:close-all *dbstruct-db*))
  (if *inmemdb*     (db:close-all *inmemdb*))
  (if (and *megatest-db*
	   (sqlite3:database? *megatest-db*))
      (begin
	(sqlite3:interrupt! *megatest-db*)
	(sqlite3:finalize! *megatest-db* #t)
	(set! *megatest-db* #f)))
  (if *task-db*     (let ((db (cdr *task-db*)))

	(inmem  (dbr:dbstruct-get-inmem dbstruct))
	(maindb (dbr:dbstruct-get-main  dbstruct))
	(refdb  (dbr:dbstruct-get-refdb dbstruct))
	(olddb  (dbr:dbstruct-get-olddb dbstruct))
	;; (runid  (dbr:dbstruct-get-run-id dbstruct))
	)
    (debug:print-info 4 "Syncing for run-id: " run-id)
    (mutex-lock! *http-mutex*)
    ;; (mutex-lock! *http-mutex*)
    (if (eq? run-id 0)
	;; runid equal to 0 is main.db
	(if maindb
	    (if (or (not (number? mtime))
		    (not (number? stime))
		    (> mtime stime)
		    force-sync)

	(if (or (not (number? mtime))
		(not (number? stime))
		(> mtime stime)
		force-sync)
	    (begin
	      (db:delay-if-busy rundb)
	      (db:delay-if-busy olddb)
	      (let ((num-synced (db:sync-tables db:sync-tests-only inmem refdb rundb olddb)))
		(dbr:dbstruct-set-stime! dbstruct (current-milliseconds))
		(mutex-unlock! *http-mutex*)
	      (dbr:dbstruct-set-stime! dbstruct (current-milliseconds))
	      (let ((num-synced (db:sync-tables db:sync-tests-only inmem refdb rundb olddb)))
		;; (mutex-unlock! *http-mutex*)
		num-synced)
	      (begin
		(mutex-unlock! *http-mutex*)
		;; (mutex-unlock! *http-mutex*)
		0))))))

(define (db:close-main dbstruct)
  (let ((maindb (dbr:dbstruct-get-main dbstruct)))
    (if maindb
	(begin
	  (sqlite3:finalize! (db:dbdat-get-db maindb))

;;
;;  run-ids: '(1 2 3 ...) or #f (for all)
;;
(define (db:multi-db-sync run-ids . options)
  (let* ((toppath  (launch:setup-for-run))
	 (dbstruct (if toppath (make-dbr:dbstruct path: toppath) #f))
	 (mtdb     (if toppath (db:open-megatest-db)))
	 (allow-cleanup (if run-ids #f #t))
	 (run-ids  (if run-ids 
		       run-ids
		       (if toppath (begin
				     (db:delay-if-busy mtdb)
				     (db:get-all-run-ids mtdb)))))
	 (tdbdat  (tasks:open-db))
	 (servers (tasks:get-all-servers (db:delay-if-busy tdbdat))))

		   (dbstruct (if toppath (make-dbr:dbstruct path: toppath local: #t) #f)))
	       (debug:print 0 "INFO: Propagating " (length testrecs) " records for run-id=" run-id " to run specific db")
	       (db:replace-test-records dbstruct run-id testrecs)
	       (sqlite3:finalize! (db:dbdat-get-db (dbr:dbstruct-get-rundb dbstruct)))))
	   run-ids)))

    ;; now ensure all newdb data are synced to megatest.db
    ;; do not use the run-ids list passed in to the function
    ;;
    (if (member 'new2old options)
	(let* ((maindb      (make-dbr:dbstruct path: toppath local: #t))
	       (src-run-ids (db:get-all-run-ids (db:dbdat-get-db (db:get-db maindb 0))))
	       (all-run-ids (sort (delete-duplicates (cons 0 src-run-ids)) <))
	       (count       1)
	       (total       (length all-run-ids))
	       (dead-runs  '()))
	(for-each
	 (lambda (run-id)
	   (let* ((fromdb (if toppath (make-dbr:dbstruct path: toppath local: #t) #f))
		  (frundb (db:dbdat-get-db (db:get-db fromdb run-id))))
	     ;; (db:delay-if-busy frundb)
	     ;; (db:delay-if-busy mtdb)
	     (if (eq? run-id 0)
		 (db:sync-tables (db:sync-main-list dbstruct) (db:get-db fromdb #f) mtdb)
		 (db:sync-tables db:sync-tests-only (db:get-db fromdb run-id) mtdb))))
	 (cons 0 run-ids)))
	  (for-each
	   (lambda (run-id)
	     (debug:print 0 "Processing run " (if (eq? run-id 0) " main.db " run-id) ", " count " of " total)
	     (set! count (+ count 1))
	     (let* ((fromdb (if toppath (make-dbr:dbstruct path: toppath local: #t) #f))
		    (frundb (db:dbdat-get-db (db:get-db fromdb run-id))))
	       ;; (db:delay-if-busy frundb)
	       ;; (db:delay-if-busy mtdb)
	       ;; (db:clean-up frundb)
	       (if (eq? run-id 0)
		   (begin
		     (db:sync-tables (db:sync-main-list dbstruct) (db:get-db fromdb #f) mtdb)
		     (set! dead-runs (db:clean-up-maindb (db:get-db fromdb #f))))
		   (begin
		     ;; NB// must sync first to ensure deleted tests get marked as such in megatest.db
		     (db:sync-tables db:sync-tests-only (db:get-db fromdb run-id) mtdb)
		     (db:clean-up-rundb (db:get-db fromdb run-id))
		     ))))
	   all-run-ids)
	  ;; removed deleted runs
	  (let ((dbdir (tasks:get-task-db-path)))
	    (for-each (lambda (run-id)
			(let ((fullname (conc dbdir "/" run-id ".db")))
			  (if (file-exists? fullname)
			      (begin
				(debug:print 0 "Removing database file for deleted run " fullname)
				(delete-file fullname)))))
		      dead-runs))))
    ;; (db:close-all dbstruct)
    ;; (sqlite3:finalize! mdb)
    ))

;; keeping it around for debugging purposes only
(define (open-run-close-no-exception-handling  proc idb . params)
  (debug:print-info 11 "open-run-close-no-exception-handling START given a db=" (if idb "yes " "no ") ", params=" params)

                                     reviewed    TIMESTAMP,
                                     iterated    TEXT DEFAULT '',
                                     avg_runtime REAL,
                                     avg_disk    REAL,
                                     tags        TEXT DEFAULT '',
                                     jobgroup    TEXT DEFAULT 'default',
                                CONSTRAINT test_meta_constraint UNIQUE (testname));")
       (sqlite3:execute db "CREATE TABLE IF NOT EXISTS tasks_queue (id INTEGER PRIMARY KEY,
                                action TEXT DEFAULT '',
                                owner TEXT,
                                state TEXT DEFAULT 'new',
                                target TEXT DEFAULT '',
                                name TEXT DEFAULT '',
                                testpatt TEXT DEFAULT '',
                                keylock TEXT,
                                params TEXT,
                                creation_time TIMESTAMP,
                                execution_time TIMESTAMP);")
       ;; move this clean up call somewhere else
       (sqlite3:execute db "DELETE FROM tasks_queue WHERE state='done' AND creation_time < ?;" (- (current-seconds)(* 24 60 60))) ;; remove older than 24 hrs
       (sqlite3:execute db (conc "CREATE INDEX IF NOT EXISTS runs_index ON runs (runname" (if havekeys "," "") keystr ");"))
       ;; (sqlite3:execute db "CREATE VIEW runs_tests AS SELECT * FROM runs INNER JOIN tests ON runs.id=tests.run_id;")
       (sqlite3:execute db "CREATE TABLE IF NOT EXISTS extradat (id INTEGER PRIMARY KEY, run_id INTEGER, key TEXT, val TEXT);")
       (sqlite3:execute db "CREATE TABLE IF NOT EXISTS metadat (id INTEGER PRIMARY KEY, var TEXT, val TEXT,
                                  CONSTRAINT metadat_constraint UNIQUE (var));")
       (sqlite3:execute db "CREATE TABLE IF NOT EXISTS access_log (id INTEGER PRIMARY KEY, user TEXT, accessed TIMESTAMP, args TEXT);")
       ;; Must do this *after* running patch db !! No more. 

;;    a. If test dir exists, set the the test to state='UNKNOWN', Set the run to 'unknown'
;;    b. If test dir gone, delete the test record
;; 2. Look at run records
;;    a. If have tests that are not deleted, set state='unknown'
;;    b. ....
;;
(define (db:clean-up dbdat)
  (debug:print 0 "WARNING: db clean up not fully ported to v1.60, cleanup action will be on megatest.db")
  ;; (debug:print 0 "WARNING: db clean up not fully ported to v1.60, cleanup action will be on megatest.db")
  (let* ((db         (db:dbdat-get-db dbdat))
	 (count-stmt (sqlite3:prepare db "SELECT (SELECT count(id) FROM tests)+(SELECT count(id) FROM runs);"))
	(statements
	 (map (lambda (stmt)
		(sqlite3:prepare db stmt))
	      (list
	       ;; delete all tests that belong to runs that are 'deleted'

			       (debug:print-info 0 "Records count after  clean: " tot))
			     count-stmt)))
    (map sqlite3:finalize! statements)
    (sqlite3:finalize! count-stmt)
    ;; (db:find-and-mark-incomplete db)
    (db:delay-if-busy dbdat)
    (sqlite3:execute db "VACUUM;")))

;; Clean out old junk and vacuum the database
;;
;; Ultimately do something like this:
;;
;; 1. Look at test records either deleted or part of deleted run:
;;    a. If test dir exists, set the the test to state='UNKNOWN', Set the run to 'unknown'
;;    b. If test dir gone, delete the test record
;; 2. Look at run records
;;    a. If have tests that are not deleted, set state='unknown'
;;    b. ....
;;
(define (db:clean-up-rundb dbdat)
  ;; (debug:print 0 "WARNING: db clean up not fully ported to v1.60, cleanup action will be on megatest.db")
  (let* ((db         (db:dbdat-get-db dbdat))
	 (count-stmt (sqlite3:prepare db "SELECT (SELECT count(id) FROM tests);"))
	(statements
	 (map (lambda (stmt)
		(sqlite3:prepare db stmt))
	      (list
	       ;; delete all tests that belong to runs that are 'deleted'
	       ;; (conc "DELETE FROM tests WHERE run_id NOT IN (" (string-intersperse (map conc valid-runs) ",") ");")
	       ;; delete all tests that are 'DELETED'
	       "DELETE FROM tests WHERE state='DELETED';"
	       ))))
    (db:delay-if-busy dbdat)
    (sqlite3:with-transaction 
     db
     (lambda ()
       (sqlite3:for-each-row (lambda (tot)
			       (debug:print-info 0 "Records count before clean: " tot))
			     count-stmt)
       (map sqlite3:execute statements)
       (sqlite3:for-each-row (lambda (tot)
			       (debug:print-info 0 "Records count after  clean: " tot))
			     count-stmt)))
    (map sqlite3:finalize! statements)
    (sqlite3:finalize! count-stmt)
    ;; (db:find-and-mark-incomplete db)
    (db:delay-if-busy dbdat)
    (sqlite3:execute db "VACUUM;")))

;; Clean out old junk and vacuum the database
;;
;; Ultimately do something like this:
;;
;; 1. Look at test records either deleted or part of deleted run:
;;    a. If test dir exists, set the the test to state='UNKNOWN', Set the run to 'unknown'
;;    b. If test dir gone, delete the test record
;; 2. Look at run records
;;    a. If have tests that are not deleted, set state='unknown'
;;    b. ....
;;
(define (db:clean-up-maindb dbdat)
  ;; (debug:print 0 "WARNING: db clean up not fully ported to v1.60, cleanup action will be on megatest.db")
  (let* ((db         (db:dbdat-get-db dbdat))
	 (count-stmt (sqlite3:prepare db "SELECT (SELECT count(id) FROM runs);"))
	 (statements
	  (map (lambda (stmt)
		 (sqlite3:prepare db stmt))
	       (list
		;; delete all tests that belong to runs that are 'deleted'
		;; (conc "DELETE FROM tests WHERE run_id NOT IN (" (string-intersperse (map conc valid-runs) ",") ");")
		;; delete all tests that are 'DELETED'
		"DELETE FROM runs WHERE state='deleted';"
		)))
	 (dead-runs '()))
    (sqlite3:for-each-row
     (lambda (run-id)
       (set! dead-runs (cons run-id dead-runs)))
       db
       "SELECT id FROM runs WHERE state='deleted';")
    (db:delay-if-busy dbdat)
    (sqlite3:with-transaction 
     db
     (lambda ()
       (sqlite3:for-each-row (lambda (tot)
			       (debug:print-info 0 "Records count before clean: " tot))
			     count-stmt)
       (map sqlite3:execute statements)
       (sqlite3:for-each-row (lambda (tot)
			       (debug:print-info 0 "Records count after  clean: " tot))
			     count-stmt)))
    (map sqlite3:finalize! statements)
    (sqlite3:finalize! count-stmt)
    ;; (db:find-and-mark-incomplete db)
    (db:delay-if-busy dbdat)
    (sqlite3:execute db "VACUUM;")
    dead-runs))

;;======================================================================
;; M E T A   G E T   A N D   S E T   V A R S
;;======================================================================

;; returns number if string->number is successful, string otherwise
;; also updates *global-delta*

       res))))

;;======================================================================
;; QUEUE UP META, TEST STATUS AND STEPS REMOTE ACCESS
;;======================================================================

;; NOTE: Can remove the regex and base64 encoding for zmq
(define (db:obj->string obj)
  (case *transport-type*
(define (db:obj->string obj #!key (transport 'http))
  (case transport
    ;; ((fs) obj)
    ((http fs)
     (string-substitute
      (regexp "=") "_"
      (base64:base64-encode 
       (z3:encode-buffer
	(with-output-to-string
	  (lambda ()(serialize obj)))))
      #t))
    ((zmq)(with-output-to-string (lambda ()(serialize obj))))
    ((zmq nmsg)(with-output-to-string (lambda ()(serialize obj))))
    (else obj)))

(define (db:string->obj msg)
  (case *transport-type*
(define (db:string->obj msg #!key (transport 'http))
  (case transport
    ;; ((fs) msg)
    ((http fs)
     (if (string? msg)
	 (with-input-from-string 
	     (z3:decode-buffer
	      (base64:base64-decode
	       (string-substitute 
		(regexp "_") "=" msg #t)))
	   (lambda ()(deserialize)))
	 (begin
	   (debug:print 0 "ERROR: reception failed. Received " msg " but cannot translate it.")
	   #f))) ;; crude reply for when things go awry
    ((zmq)(with-input-from-string msg (lambda ()(deserialize))))
	   msg))) ;; crude reply for when things go awry
    ((zmq nmsg)(with-input-from-string msg (lambda ()(deserialize))))
    (else msg)))

(define (db:test-set-status-state dbstruct run-id test-id status state msg)
  (let ((dbdat  (db:get-db dbstruct run-id)))
    (if (member state '("LAUNCHED" "REMOTEHOSTSTART"))
	(db:general-call dbdat 'set-test-start-time (list test-id)))
    (if msg

sudo netstat -lptu
sudo netstat -tulpn</code></pre>
</div></div>
</div>
</div>
</div>
<h1 id="_reference">Reference</h1>
<div class="sect1">
<h2 id="_the_first_chapter_of_the_second_part_2">The First Chapter of the Second Part</h2>
<div class="sectionbody">
<div class="paragraph"><p>Chapters grouped into book parts are at level 1 and can contain
sub-sections.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_the_testconfig_file">The testconfig File</h2>
<div class="sectionbody">
<div class="sect2">
<h3 id="_setup_section">Setup section</h3>
<div class="sect3">
<h4 id="_header">Header</h4>

<td class="icon">
<div class="title">Note</div>
</td>
<td class="content">There is a trailing space after the --</td>
</tr></table>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_programming_api">Programming API</h2>
<div class="sectionbody">
<div class="paragraph"><p>These routines can be called from the megatest repl.</p></div>
<div class="tableblock">
<table rules="all"
width="70%"
frame="hsides"
cellspacing="0" cellpadding="4">
<caption class="title">Table 2. API Server Management Calls</caption>
<col width="14%" />
<col width="28%" />
<col width="28%" />
<col width="28%" />
<thead>
<tr>
<th align="center" valign="top">API Call                  </th>
<th align="left" valign="top"> Purpose comments   </th>
<th align="left" valign="top"> Returns                 </th>
<th align="left" valign="top"> Comments</th>
</tr>
</thead>
<tfoot>
<tr>
<td align="center" valign="top"><p class="table">(rmt:login        run-id)</p></td>
<td align="left" valign="top"><p class="table"><code>Verify the the version, testsuite area etc. are correct.</code></p></td>
<td align="left" valign="top"><p class="table"><code>#( #t "successful login" )</code></p></td>
<td align="left" valign="top"><p class="table"><code></code></p></td>
</tr>
</tfoot>
<tbody>
<tr>
<td align="center" valign="top"><p class="table">(rmt:start-server run-id)</p></td>
<td align="left" valign="top"><p class="table"><code></code></p></td>
<td align="left" valign="top"><p class="table"><code>#( success/fail   n/a )</code></p></td>
<td align="left" valign="top"><p class="table"><code></code></p></td>
</tr>
<tr>
<td align="center" valign="top"><p class="table">(rmt:kill-server  run-id)</p></td>
<td align="left" valign="top"><p class="table"><code></code></p></td>
<td align="left" valign="top"><p class="table"><code>#( success/fail   n/a )</code></p></td>
<td align="left" valign="top"><p class="table"><code>Works only if the server is still reachable</code></p></td>
</tr>
</tbody>
</table>
</div>
<div class="tableblock">
<table rules="all"
width="70%"
frame="hsides"
cellspacing="0" cellpadding="4">
<caption class="title">Table 3. API Keys Related Calls</caption>
<col width="14%" />
<col width="28%" />
<col width="28%" />
<col width="28%" />
<thead>
<tr>
<th align="center" valign="top">API Call                        </th>
<th align="left" valign="top"> Purpose comments   </th>
<th align="left" valign="top"> Returns                 </th>
<th align="left" valign="top"> Comments</th>
</tr>
</thead>
<tfoot>
<tr>
<td align="center" valign="top"><p class="table">(rmt:get-key-val-pairs run-id)</p></td>
<td align="left" valign="top"><p class="table"><code></code></p></td>
<td align="left" valign="top"><p class="table"><code>#t=success/#f=fail</code></p></td>
<td align="left" valign="top"><p class="table"><code>Works only if the server is still reachable</code></p></td>
</tr>
</tfoot>
<tbody>
<tr>
<td align="center" valign="top"><p class="table">(rmt:get-keys run-id)</p></td>
<td align="left" valign="top"><p class="table"><code></code></p></td>
<td align="left" valign="top"><p class="table"><code>( key1 key2 &#8230; )</code></p></td>
<td align="left" valign="top"><p class="table"><code></code></p></td>
</tr>
</tbody>
</table>
</div>
<div class="sect2">
<h3 id="_megatest_internals">Megatest Internals</h3>
<div class="imageblock graphviz">
<div class="content">
<img src="server.png" alt="server.png" />
</div>
</div>

</div>
</div>
</div>
<div id="footnotes"><hr /></div>
<div id="footer">
<div id="footer-text">
Version 1.0<br />
Last updated 2014-10-08 23:02:21 MST
Last updated 2014-11-25 21:11:28 MST
</div>
</div>
</body>
</html>

Reference
=========

The First Chapter of the Second Part
------------------------------------

Chapters grouped into book parts are at level 1 and can contain
sub-sections.

The testconfig File
-------------------

Setup section
~~~~~~~~~~~~~

Header

-----------------
[triggers]
COMPLETED/ xterm -e bash -s -- 
-----------------

NOTE: There is a trailing space after the --

Programming API
---------------

These routines can be called from the megatest repl. 

.API Server Management Calls
[width="70%",cols="^,2m,2m,2m",frame="topbot",options="header,footer"]
|======================
|API Call                  | Purpose comments   | Returns                 | Comments
|(rmt:start-server run-id) |                    | #( success/fail   n/a ) | 
|(rmt:kill-server  run-id) |                    | #( success/fail   n/a ) | Works only if the server is still reachable
|(rmt:login        run-id) | Verify the the version, testsuite area etc. are correct. | #( #t "successful login" ) |
|======================

.API Keys Related Calls
[width="70%",cols="^,2m,2m,2m",frame="topbot",options="header,footer"]
|======================
|API Call                        | Purpose comments   | Returns                 | Comments
|(rmt:get-keys run-id)           |                    | ( key1 key2 ... )       | 
| (rmt:get-key-val-pairs run-id) |                    | #t=success/#f=fail      | Works only if the server is still reachable
|======================


:numbered!:

;; Copyright 2006-2012, Matthew Welland.
;; 
;;  This program is made available under the GNU GPL version 2.0 or
;;  greater. See the accompanying file COPYING for details.
;; 
;;  This program is distributed WITHOUT ANY WARRANTY; without even the
;;  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
;;  PURPOSE.

(require-extension (srfi 18) extras tcp s11n)

(use sqlite3 srfi-1 posix regex regex-case srfi-69 hostinfo md5 message-digest)
(import (prefix sqlite3 sqlite3:))

(use spiffy uri-common intarweb http-client spiffy-request-vars)

(tcp-buffer-size 2048)

(declare (unit fs-transport))

(declare (uses common))
(declare (uses db))
(declare (uses tests))
(declare (uses tasks)) ;; tasks are where stuff is maintained about what is running.

(include "common_records.scm")
(include "db_records.scm")


;;======================================================================
;; F S   T R A N S P O R T   S E R V E R
;;======================================================================

;; There is no "server" per se but a convience routine to make it non
;; necessary to be reopening the db over and over again.
;;

(define (fs:process-queue-item packet)
  (if (not *megatest-db*) ;; we will require that (setup-for-run) has already been called
      (set! *megatest-db* (open-db)))
  (debug:print-info 11 "fs:process-queue-item called with packet=" packet)
  (db:process-queue-item *megatest-db* packet))
      

	 (link-tree-path  (configf:lookup *configdat* "setup" "linktree")))
    ;; (set! db *inmemdb*)
    (debug:print-info 0 "portlogger recommended port: " start-port)
    (root-path     (if link-tree-path 
		       link-tree-path
		       (current-directory))) ;; WARNING: SECURITY HOLE. FIX ASAP!
    (handle-directory spiffy-directory-listing)
    (handle-exception (lambda (exn chain)
			(signal (make-composite-condition
				 (make-property-condition 
				  'server
				  'message "server error")))))

    ;; http-transport:handle-directory) ;; simple-directory-handler)
    ;; Setup the web server and a /ctrl interface
    ;;
    (vhost-map `(((* any) . ,(lambda (continue)
			       ;; open the db on the first call 
				 ;; This is were we set up the database connections
			       (let* (($   (request-vars source: 'both))
				      (dat ($ 'dat))
				      (res #f))
				 (cond
				  ((equal? (uri-path (request-uri (current-request)))
					   '(/ "api"))
				   (send-response body:    (api:process-request *inmemdb* $) ;; the $ is the request vars proc
						  headers: '((content-type text/plain)))
				   (mutex-lock! *heartbeat-mutex*)
				   (set! *last-db-access* (current-seconds))
				   (mutex-unlock! *heartbeat-mutex*))
				  ;; This is the /ctrl path where data is handed to the server and
				  ;; responses 
				  ;; ((equal? (uri-path (request-uri (current-request)))
				  ;;          '(/ "ctrl"))
				  ;;  (let* ((packet (db:string->obj dat))
				  ;;         (qtype  (cdb:packet-get-qtype packet)))
				  ;;    (debug:print-info 12 "server=> received packet=" packet)
				  ;;    (if (not (member qtype '(sync ping)))
				  ;;        (begin
				  ;;          (mutex-lock! *heartbeat-mutex*)
				  ;;          (set! *last-db-access* (current-seconds))
				  ;;          (mutex-unlock! *heartbeat-mutex*)))
				  ;;    ;; (mutex-lock! *db:process-queue-mutex*) ;; trying a mutex
				  ;;    ;; (set! res (open-run-close db:process-queue-item open-db packet))
				  ;;    (set! res (db:process-queue-item db packet))
				  ;;    ;; (mutex-unlock! *db:process-queue-mutex*)
				  ;;    (debug:print-info 11 "Return value from db:process-queue-item is " res)
				  ;;    (send-response body: (conc "<head>ctrl data</head>\n<body>"
				  ;;       			res
				  ;;       			"</body>")
				  ;;       	    headers: '((content-type text/plain)))))
				  ((equal? (uri-path (request-uri (current-request))) 
					   '(/ ""))
				   (send-response body: (http-transport:main-page)))
				  ((equal? (uri-path (request-uri (current-request))) 
					   '(/ "runs"))
				   (send-response body: (http-transport:main-page)))
				  ((equal? (uri-path (request-uri (current-request))) 

(define (http-transport:client-api-send-receive run-id serverdat cmd params #!key (numretries 3))
  (let* ((fullurl    (if (vector? serverdat)
			 (http-transport:server-dat-get-api-req serverdat)
			 (begin
			   (debug:print 0 "FATAL ERROR: http-transport:client-api-send-receive called with no server info")
			   (exit 1))))
	 (res        #f)
	 (success    #t))
    (handle-exceptions
     exn
     (if (> numretries 0)
	 (begin
	   (mutex-unlock! *http-mutex*)
	   (thread-sleep! 1)
	   (handle-exceptions
	    exn
	    (debug:print 0 "WARNING: closing connections failed. Server at " fullurl " almost certainly dead")
	    (close-all-connections!))
	   (debug:print 0 "WARNING: Failed to communicate with server, trying again, numretries left: " numretries)
	   (http-transport:client-api-send-receive run-id serverdat cmd params numretries: (- numretries 1)))
	 (begin
	   (mutex-unlock! *http-mutex*)
	   (tasks:kill-server-run-id run-id)
	   #f))
     (begin
	 (success    #t)
	 (sparams    (db:obj->string params transport: 'http)))
;;    (condition-case
;;     handle-exceptions
;;     exn
;;     (if (> numretries 0)
;;	 (begin
;;	   (mutex-unlock! *http-mutex*)
;;	   (thread-sleep! 1)
;;	   (handle-exceptions
;;	    exn
;;	    (debug:print 0 "WARNING: closing connections failed. Server at " fullurl " almost certainly dead")
;;	    (close-all-connections!))
;;	   (debug:print 0 "WARNING: Failed to communicate with server, trying again, numretries left: " numretries)
;;	   (http-transport:client-api-send-receive run-id serverdat cmd sparams numretries: (- numretries 1)))
;;	 (begin
;;	   (mutex-unlock! *http-mutex*)
;;	   (tasks:kill-server-run-id run-id)
;;	   #f))
;;     (begin
       (debug:print-info 11 "fullurl=" fullurl ", cmd=" cmd ", params=" params ", run-id=" run-id "\n")
       ;; set up the http-client here
       (max-retry-attempts 1)
       ;; consider all requests indempotent
       (retry-request? (lambda (request)
			 #f))
       ;; send the data and get the response
       ;; extract the needed info from the http data and 
       ;; process and return it.
       (let* ((send-recieve (lambda ()
			      (mutex-lock! *http-mutex*)
			      ;; (condition-case (with-input-from-request "http://localhost"; #f read-lines)
			      ;;					       ((exn http client-error) e (print e)))
			      (set! res (vector
					 success
					 (db:string->obj 
					 (handle-exceptions
					  exn
					  (begin
					    (set! success #f)
					    (debug:print 0 "WARNING: failure in with-input-from-request to " fullurl ". Killing associated server to allow clean retry.")
					    (debug:print 0 " message: " ((condition-property-accessor 'exn 'message) exn))
					    (hash-table-delete! *runremote* run-id)
					    ;; (tasks:kill-server-run-id run-id)  ;; better to kill the server in the logic that called this routine.
					  (handle-exceptions
					   exn
					   (begin
					     (set! success #f)
					     (debug:print 0 "WARNING: failure in with-input-from-request to " fullurl ".")
					     (debug:print 0 " message: " ((condition-property-accessor 'exn 'message) exn))
					     (hash-table-delete! *runremote* run-id)
					     ;; Killing associated server to allow clean retry.")
					     (tasks:kill-server-run-id run-id)  ;; better to kill the server in the logic that called this routine?
					    #f)
					  (with-input-from-request ;; was dat
					   fullurl 
					   (list (cons 'key "thekey")
						 (cons 'cmd cmd)
						 (cons 'params params))
					   read-string))))
					     ;; (signal (make-composite-condition
					     ;;          (make-property-condition 'commfail 'message "failed to connect to server")))
					     "communications failed")
					   (with-input-from-request ;; was dat
					    fullurl 
					    (list (cons 'key "thekey")
						  (cons 'cmd cmd)
						  (cons 'params sparams))
					    read-string))
					  transport: 'http)))
			      ;; Shouldn't this be a call to the managed call-all-connections stuff above?
			      (close-all-connections!)
			      (mutex-unlock! *http-mutex*)
			      ))
	      (time-out     (lambda ()
			      (thread-sleep! 45)
			      #f))
	      (th1 (make-thread send-recieve "with-input-from-request"))
	      (th2 (make-thread time-out     "time out")))
	 (thread-start! th1)
	 (thread-start! th2)
	 (thread-join! th1)
	 (thread-terminate! th2)
	 (debug:print-info 11 "got res=" res)
	 (if (vector? res)
	     (if (vector-ref res 0)
	 res)))))
		 res
		 (begin ;; note: this code also called in nmsg-transport - consider consolidating it
		   (debug:print 0 "ERROR: error occured at server, info=" (vector-ref res 2))
		   (debug:print 0 " client call chain:")
		   (print-call-chain (current-error-port))
		   (debug:print 0 " server call chain:")
		   (pp (vector-ref res 1) (current-error-port))
		   (signal (vector-ref result 0))))
	     (signal (make-composite-condition
		      (make-property-condition 
		       'timeout
		       'message "nmsg-transport:client-api-send-receive-raw timed out talking to server")))))))

;; careful closing of connections stored in *runremote*
;;
(define (http-transport:close-connections run-id)
  (let* ((server-dat (hash-table-ref/default *runremote* run-id #f)))
    (if (vector? server-dat)
	(let ((api-dat (http-transport:server-dat-get-api-uri server-dat)))
	  (close-connection! api-dat)
	  #t)
	#f)))


(define (make-http-transport:server-dat)(make-vector 5))
(define (make-http-transport:server-dat)(make-vector 6))
(define (http-transport:server-dat-get-iface         vec)    (vector-ref  vec 0))
(define (http-transport:server-dat-get-port          vec)    (vector-ref  vec 1))
(define (http-transport:server-dat-get-api-uri       vec)    (vector-ref  vec 2))
(define (http-transport:server-dat-get-api-url       vec)    (vector-ref  vec 3))
(define (http-transport:server-dat-get-api-req       vec)    (vector-ref  vec 4))
(define (http-transport:server-dat-get-last-access   vec)    (vector-ref  vec 5))
(define (http-transport:server-dat-get-socket        vec)    (vector-ref  vec 6))

(define (http-transport:server-dat-make-url vec)
  (if (and (http-transport:server-dat-get-iface vec)
	   (http-transport:server-dat-get-port  vec))
      (conc "http://" 
	    (http-transport:server-dat-get-iface vec)
	    ":"

;; run http-transport:keep-running in a parallel thread to monitor that the db is being 
;; used and to shutdown after sometime if it is not.
;;
(define (http-transport:keep-running server-id run-id)
  ;; if none running or if > 20 seconds since 
  ;; server last used then start shutdown
  ;; This thread waits for the server to come alive
  (debug:print-info 0 "Starting the sync-back, keep alive thread in server for run-id=" run-id)
  (let* ((tdbdat      (tasks:open-db))
	 (server-info (let loop ((start-time (current-seconds))
				 (changed    #t)
				 (last-sdat  "not this"))
                        (let ((sdat #f))
			  (thread-sleep! 0.01)
			  (debug:print-info 0 "Waiting for server alive signature")

				      (exit))
				    (loop start-time
					  (equal? sdat last-sdat)
					  sdat)))))))
         (iface       (car server-info))
         (port        (cadr server-info))
         (last-access 0)
	 (server-timeout (let ((tmo (configf:lookup  *configdat* "server" "timeout")))
	 (server-timeout (server:get-timeout)))
			   (if (and (string? tmo)
				    (string->number tmo))
			       (* 60 60 (string->number tmo))
			       ;; (* 3 24 60 60) ;; default to three days
			       (* 60 1)         ;; default to one minute
			       ;; (* 60 60 25)      ;; default to 25 hours
			       ))))
    (let loop ((count         0)
	       (server-state 'available))


      ;; Use this opportunity to sync the inmemdb to db
      (let ((start-time (current-milliseconds))
	    (sync-time  #f)
	    (rem-time   #f))
	;; inmemdb is a dbstruct
	(if *inmemdb* (db:sync-touched *inmemdb* *run-id* force-sync: #t))
	(set! sync-time  (- (current-milliseconds) start-time))

      ;; (debug:print 11 "last-access=" last-access ", server-timeout=" server-timeout)
      ;;
      ;; no_traffic, no running tests, if server 0, no running servers
      ;;
      ;; (let ((wait-on-running (configf:lookup *configdat* "server" "wait-on-running"))) ;; wait on running tasks (if not true then exit on time out)
      ;;
      (if (and *server-run*
	       ;; (or
	       (> (+ last-access server-timeout)
		  (current-seconds)))
;;		   (and (eq? run-id 0)
;;			(> (tasks:num-servers-non-zero-running tdb) 0))
;;		   (and (not (eq? run-id 0)) ;; only makes sense in non-zero run-id servers
;;			(> (db:get-count-tests-actually-running *inmemdb* run-id) 0))
;;		   ))
	  (begin
	    (debug:print-info 0 "Server continuing, seconds since last db access: " (- (current-seconds) last-access))
	    ;;
	    ;; Consider implementing some smarts here to re-insert the record or kill self is
	    ;; the db indicates so
	    ;;
	    ;; (if (tasks:server-am-i-the-server? tdb run-id)

				   "Keep running")))
	    (thread-start! th2)
	    (thread-sleep! 0.25) ;; give the server time to settle before starting the keep-running monitor.
	    (thread-start! th3)
	    (set! *didsomething* #t)
	    (thread-join! th2)
	    (exit))))))

(define (http:ping run-id host-port)
  (let* ((server-dat (http-transport:client-connect (car host-port)(cadr host-port)))
	 (login-res  (rmt:login-no-auto-client-setup server-dat run-id)))
    (if (and (list? login-res)
	     (car login-res))
	(begin
	  (print "LOGIN_OK")
	  (exit 0))
	(begin
	  (print "LOGIN_FAILED")
	  (exit 1)))))

(define (http-transport:server-signal-handler signum)
  (signal-mask! signum)
  (handle-exceptions
   exn
   (debug:print " ... exiting ...")
   (let ((th1 (make-thread (lambda ()

	(set! *configinfo* (find-and-read-config 
			    (if (args:get-arg "-config")(args:get-arg "-config") "megatest.config")
			    environ-patt: "env-override"
			    given-toppath: (get-environment-variable "MT_RUN_AREA_HOME")
			    pathenvvar: "MT_RUN_AREA_HOME"))
	(set! *configdat*  (if (car *configinfo*)(car *configinfo*) #f))
	(set! *toppath*    (if (car *configinfo*)(cadr *configinfo*) #f))
	(let* ((tmptransport (configf:lookup *configdat* "server" "transport"))
	       (transport    (if tmptransport (string->symbol tmptransport) 'http)))
	  (if (member transport '(http rpc nmsg))
	      (set! *transport-type* transport)
	      (begin
		(debug:print 0 "ERROR: Unrecognised transport " transport)
		(exit))))
	(let ((linktree (configf:lookup *configdat* "setup" "linktree"))) ;; link tree is critical
	  (if linktree
	      (if (not (file-exists? linktree))
		  (begin
		    (handle-exceptions
		     exn
		     (begin

;; Copyright 2006-2012, Matthew Welland.
;; 
;;  This program is made available under the GNU GPL version 2.0 or
;;  greater. See the accompanying file COPYING for details.
;; 
;;  This program is distributed WITHOUT ANY WARRANTY; without even the
;;  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
;;  PURPOSE.

;; (include "common.scm")
;; (include "megatest-version.scm")

(use sqlite3 srfi-1 posix regex regex-case srfi-69 base64 format readline apropos json 
     http-client directory-utils z3 srfi-18) ;;  extras)
(use sqlite3 srfi-1 posix regex regex-case srfi-69 base64 format readline apropos json http-client directory-utils rpc ;; (srfi 18) extras)
     http-client srfi-18) ;;  zmq extras)

(import (prefix sqlite3 sqlite3:))
(import (prefix base64 base64:))
(import (prefix rpc rpc:))

;; (use zmq)

(declare (uses common))
(declare (uses megatest-version))
(declare (uses margs))
(declare (uses runs))
(declare (uses launch))
(declare (uses server))
(declare (uses client))
(declare (uses tests))
(declare (uses genexample))
(declare (uses daemon))
(declare (uses db))
;; (declare (uses sdb))

;; (declare (uses filedb))
(declare (uses tdb))
(declare (uses mt))
(declare (uses api))
(declare (uses tasks)) ;; only used for debugging.

(define *db* #f) ;; this is only for the repl, do not use in general!!!!

  -import-megatest.db     : migrate a database from v1.55 series to v1.60 series
  -sync-to-megatest.db    : migrate data back to megatest.db
  -update-meta            : update the tests metadata for all tests
  -setvars VAR1=val1,VAR2=val2 : Add environment variables to a run NB// these are
                                 overwritten by values set in config files.
  -server -|hostname      : start the server (reduces contention on megatest.db), use
                            - to automatically figure out hostname
  -transport http|zmq     : use http or zmq for transport (default is http) 
  -daemonize              : fork into background and disconnect from stdin/out
  -log logfile            : send stdout and stderr to logfile
  -list-servers           : list the servers 
  -stop-server id         : stop server specified by id (see output of -list-servers), use
                            0 to kill all
  -repl                   : start a repl (useful for extending megatest)
  -load file.scm          : load and run file.scm

			":expected"
			":tol"
			":units"
			;; misc
			"-start-dir"
			"-server"
			"-stop-server"
			"-transport"
			"-kill-server"
			"-port"
			"-extract-ods"
			"-pathmod"
			"-env2file"
			"-setvars"
			"-set-state-status"
			"-set-run-status"

			"-q" ;; quiet 0, errors/warnings only
		       )
		 args:arg-hash
		 0))

;; The watchdog is to keep an eye on things like db sync etc.
;;
(define *time-zero* (current-seconds))
(define *watchdog*
  (make-thread 
   (lambda ()
     (thread-sleep! 0.05) ;; delay for startup
     (let ((legacy-sync (configf:lookup *configdat* "setup" "megatest-db")))
     (let ((legacy-sync (configf:lookup *configdat* "setup" "megatest-db"))
	   (debug-mode  (debug:debug-mode 1))
	   (last-time   (current-seconds)))
       (let loop ()
	 ;; sync for filesystem local db writes
	 ;;
	 (let ((start-time      (current-seconds))
	       (servers-started (make-hash-table)))
	   (for-each 
	    (lambda (run-id)

			  (debug:print-info 0 "Sync of newdb to olddb for run-id " run-id " completed in " sync-time " seconds")))
		    ;; (if (> sync-time 10) ;; took more than ten seconds, start a server for this run
		    ;;     (begin
		    ;;       (debug:print-info 0 "Sync is taking a long time, start up a server to assist for run " run-id)
		    ;;       (server:kind-run run-id)))))
		    (hash-table-delete! *db-local-sync* run-id)))
	      (mutex-unlock! *db-multi-sync-mutex*))
	    (hash-table-keys *db-local-sync*)))

	    (hash-table-keys *db-local-sync*))
	   (if (and debug-mode
		    (> (- start-time last-time) 14))
	       (begin
		 (set! last-time start-time)
		 (debug:print-info 0 "timestamp -> " (seconds->time-string (current-seconds)) ", time since start -> " (seconds->hr-min-sec (- (current-seconds) *time-zero*))))))
	 
	 ;; keep going unless time to exit
	 ;;
	 (if (not *time-to-exit*)
	     (begin
	       (thread-sleep! 1) ;; wait one second before syncing again
	       (thread-sleep! 5) ;; wait five seconds before syncing again, we'll also sync on exit
	       (loop)))))
     "Watchdog thread")))

(thread-start! *watchdog*)

(if (args:get-arg "-log")
    (let ((oup (open-output-file (args:get-arg "-log"))))

      ))

(if (args:get-arg "-ping")
    (let* ((run-id        (string->number (args:get-arg "-run-id")))
	   (host:port     (args:get-arg "-ping")))
      (server:ping run-id host:port)))

;;       (set! *did-something* #t)
;; 	      (begin
;; 		(print ((rpc:procedure 'testing (car host-port)(cadr host-port))))
;; 		(case (server:get-transport)
;; 		  ((http)(http:ping run-id host-port))
;; 		  ((rpc) (rpc:procedure 'server:login (car host-port)(cadr host-port));;  *toppath*)) ;; (rpc-transport:ping  run-id (car host-port)(cadr host-port)))
;; 		  (else  (debug:print 0 "ERROR: No transport set")(exit)))))

;;======================================================================
;; Start the server - can be done in conjunction with -runall or -runtests (one day...)
;;   we start the server if not running else start the client thread
;;======================================================================

(if (args:get-arg "-server")

    ;;  Setup client for all expect listed here
    (if (null? (lset-intersection 
		     equal?
		     (hash-table-keys args:arg-hash)
		     '("-list-servers"
		       "-stop-server"
		       "-show-cmdinfo"
		       "-list-runs")))
		       "-list-runs"
		       "-ping")))
	(if (launch:setup-for-run)
	    (let ((run-id    (and (args:get-arg "-run-id")
				  (string->number (args:get-arg "-run-id")))))
	      ;; (set! *fdb*   (filedb:open-db (conc *toppath* "/db/paths.db")))
	      ;; if not list or kill then start a client (if appropriate)
	      (if (or (args-defined? "-h" "-version" "-gen-megatest-area" "-gen-megatest-test")
		      (eq? (length (hash-table-keys args:arg-hash)) 0))

;;======================================================================
;; Get test paths matching target, runname, and testpatt
(if (or (args:get-arg "-test-files")(args:get-arg "-test-paths"))
    ;; if we are in a test use the MT_CMDINFO data
    (if (getenv "MT_CMDINFO")
	(let* ((startingdir (current-directory))
	       (cmdinfo   (common:read-encoded-string (getenv "MT_CMDINFO")))
	       (transport (assoc/default 'transport cmdinfo))
	       (testpath  (assoc/default 'testpath  cmdinfo))
	       (test-name (assoc/default 'test-name cmdinfo))
	       (runscript (assoc/default 'runscript cmdinfo))
	       (db-host   (assoc/default 'db-host   cmdinfo))
	       (run-id    (assoc/default 'run-id    cmdinfo))
	       (itemdat   (assoc/default 'itemdat   cmdinfo))
	       (state     (args:get-arg ":state"))

;;======================================================================
;; Archive tests matching target, runname, and testpatt
(if (args:get-arg "-archive")
    ;; if we are in a test use the MT_CMDINFO data
    (if (getenv "MT_CMDINFO")
	(let* ((startingdir (current-directory))
	       (cmdinfo   (common:read-encoded-string (getenv "MT_CMDINFO")))
	       (transport (assoc/default 'transport cmdinfo))
	       (testpath  (assoc/default 'testpath  cmdinfo))
	       (test-name (assoc/default 'test-name cmdinfo))
	       (runscript (assoc/default 'runscript cmdinfo))
	       (db-host   (assoc/default 'db-host   cmdinfo))
	       (run-id    (assoc/default 'run-id    cmdinfo))
	       (itemdat   (assoc/default 'itemdat   cmdinfo))
	       (state     (args:get-arg ":state"))

(define (megatest:step step state status logfile msg)
  (if (not (getenv "MT_CMDINFO"))
      (begin
	(debug:print 0 "ERROR: MT_CMDINFO env var not set, -step must be called *inside* a megatest invoked environment!")
	(exit 5))
      (let* ((cmdinfo   (common:read-encoded-string (getenv "MT_CMDINFO")))
	     (transport (assoc/default 'transport cmdinfo))
	     (testpath  (assoc/default 'testpath  cmdinfo))
	     (test-name (assoc/default 'test-name cmdinfo))
	     (runscript (assoc/default 'runscript cmdinfo))
	     (db-host   (assoc/default 'db-host   cmdinfo))
	     (run-id    (assoc/default 'run-id    cmdinfo))
	     (test-id   (assoc/default 'test-id   cmdinfo))
	     (itemdat   (assoc/default 'itemdat   cmdinfo))

	(args:get-arg "-summarize-items"))
    (if (not (getenv "MT_CMDINFO"))
	(begin
	  (debug:print 0 "ERROR: MT_CMDINFO env var not set, commands -test-status, -runstep and -setlog must be called *inside* a megatest environment!")
	  (exit 5))
	(let* ((startingdir (current-directory))
	       (cmdinfo   (common:read-encoded-string (getenv "MT_CMDINFO")))
	       (transport (assoc/default 'transport cmdinfo))
	       (testpath  (assoc/default 'testpath  cmdinfo))
	       (test-name (assoc/default 'test-name cmdinfo))
	       (runscript (assoc/default 'runscript cmdinfo))
	       (db-host   (assoc/default 'db-host   cmdinfo))
	       (run-id    (assoc/default 'run-id    cmdinfo))
	       (test-id   (assoc/default 'test-id   cmdinfo))
	       (itemdat   (assoc/default 'itemdat   cmdinfo))

;; Copyright 2006-2014, Matthew Welland.
;; 
;;  This program is made available under the GNU GPL version 2.0 or
;;  greater. See the accompanying file COPYING for details.
;; 
;;  This program is distributed WITHOUT ANY WARRANTY; without even the
;;  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
;;  PURPOSE.

;;  strftime('%m/%d/%Y %H:%M:%S','now','localtime')

;;======================================================================
;; MLAUNCH
;;
;;   take jobs from the given queue and keep launching them keeping
;;   the cpu load at the targeted level
;;
;;======================================================================

(use sqlite3 srfi-1 posix regex regex-case srfi-69 dot-locking format)
(import (prefix sqlite3 sqlite3:))

(declare (unit mlaunch))
(declare (uses db))
(declare (uses common))

;; (if (args:get-arg "-host")
;;     (begin
;;       (set! *runremote* (string-split (args:get-arg "-host" ":")))
;;       (client:launch))
;;     (client:launch))

;; ease debugging by loading ~/.dashboardrc
(let ((debugcontrolf (conc (get-environment-variable "HOME") "/.dashboardrc")))
  (if (file-exists? debugcontrolf)
      (load debugcontrolf)))

(define *dbdir* (conc (configf:lookup *configdat* "setup" "linktree") "/.db"))
(define *dbstruct-local*  (make-dbr:dbstruct path:  *dbdir*
					     local: #t))
(define *db-file-path* (db:dbfile-path 0))

;; HACK ALERT: this is a hack, please fix.

;; Copyright 2006-2012, Matthew Welland.
;; 
;;  This program is made available under the GNU GPL version 2.0 or
;;  greater. See the accompanying file COPYING for details.
;; 
;;  This program is distributed WITHOUT ANY WARRANTY; without even the
;;  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
;;  PURPOSE.

(require-extension (srfi 18) extras tcp s11n)

(use sqlite3 srfi-1 posix regex regex-case srfi-69 hostinfo md5 message-digest)
(import (prefix sqlite3 sqlite3:))

(use nanomsg)

(declare (unit nmsg-transport))

(declare (uses common))
(declare (uses db))
(declare (uses tests))
(declare (uses tasks)) ;; tasks are where stuff is maintained about what is running.
(declare (uses server))

(include "common_records.scm")
(include "db_records.scm")

;; Transition to pub --> sub with pull <-- push
;;
;;   1. client sends request to server via push to the pull port
;;   2. server puts request in queue or processes immediately as appropriate
;;   3. server puts responses from completed requests into pub port 
;;
;; TODO
;;
;; Done Tested
;; [x]  [ ]    1. Add columns pullport pubport to servers table
;; [x]  [ ]    2. Add rm of monitor.db if older than 11/12/2012 
;; [x]  [ ]    3. Add create of pullport and pubport with finding of available ports
;; [x]  [ ]    4. Add client compose of request
;; [x]  [ ]        - name of client: testname/itempath-test_id-hostname 
;; [x]  [ ]        - name of request: callname, params
;; [x]  [ ]        - request key: f(clientname, callname, params)
;; [x]  [ ]    5. Add processing of subscription hits
;; [x]  [ ]        - done when get key 
;; [x]  [ ]        - return results
;; [x]  [ ]    6. Add timeout processing
;; [x]  [ ]        - after 60 seconds
;; [ ]  [ ]            i. check server alive, connect to new if necessary
;; [ ]  [ ]           ii. resend request
;; [ ]  [ ]    7. Turn self ping back on

(define (nmsg-transport:make-server-url hostport #!key (bindall #f))
  (if (not hostport)
      #f
      (conc "tcp://" (if bindall "*" (car hostport)) ":" (cadr hostport))))

(define *server-loop-heart-beat* (current-seconds))
(define *heartbeat-mutex* (make-mutex))

;;======================================================================
;; S E R V E R
;;======================================================================

(define (nmsg-transport:run dbstruct hostn run-id server-id #!key (retrynum 1000))
  (debug:print 2 "Attempting to start the server ...")
  (let* ((start-port      (portlogger:open-run-close portlogger:find-port))
	 (server-thread   (make-thread (lambda ()
					 (nmsg-transport:try-start-server dbstruct run-id start-port server-id))
				       "server thread"))
	 (tdbdat          (tasks:open-db)))
    (thread-start! server-thread)
    (thread-sleep! 0.1)
    (if (nmsg-transport:ping hostn start-port timeout: 2 expected-key: (current-process-id))
	(let ((interface (if (equal? hostn "-")(get-host-name) hostn)))
	  (tasks:server-set-interface-port (db:delay-if-busy tdbdat) server-id interface start-port)
	  (tasks:server-set-state! (db:delay-if-busy tdbdat) server-id "dbprep")
	  (set! *server-info* (list hostn start-port)) ;; probably not needed anymore? currently used by keep-running
	  (thread-sleep! 3) ;; give some margin for queries to complete before switching from file based access to server based access
	  ;; (set! *inmemdb*  dbstruct)
	  (tasks:server-set-state! (db:delay-if-busy tdbdat) server-id "running")
	  (thread-start! (make-thread
			  (lambda ()(nmsg-transport:keep-running server-id run-id))
			  "keep running"))
	  (thread-join! server-thread))
	(if (> retrynum 0)
	    (begin
	      (debug:print 0 "WARNING: Failed to connect to server (self) on host " hostn ":" start-port ", trying again.")
	      (tasks:server-delete-record (db:delay-if-busy tdbdat) server-id "failed to start, never received server alive signature")
	      (portlogger:open-run-close portlogger:set-failed start-port)
	      (nmsg-transport:run dbstruct hostn run-id server-id))
	    (begin
	      (debug:print 0 "ERROR: could not find an open port to start server on. Giving up")
	      (exit 1))))))

(define (nmsg-transport:try-start-server dbstruct run-id portnum server-id)
  (let ((repsoc (nn-socket 'rep)))
    (nn-bind repsoc (conc "tcp://*:" portnum))
    (let loop ((msg-in (nn-recv repsoc)))
      (let* ((dat    (db:string->obj msg-in transport: 'nmsg)))
	(debug:print 0 "server, received: " dat)
	(let ((result (api:execute-requests dbstruct dat)))
	  (debug:print 0 "server, sending: " result)
	  (nn-send repsoc (db:obj->string result  transport: 'nmsg)))
	(loop (nn-recv repsoc))))))

;; all routes though here end in exit ...
;;
(define (nmsg-transport:launch run-id)
  (let* ((tdbdat   (tasks:open-db))
	 (dbstruct (db:setup run-id))
	 (hostn    (or (args:get-arg "-server") "-")))
    (set! *run-id*   run-id)
    (set! *inmemdb* dbstruct)
    ;; with nbfake daemonize isn't really needed
    ;;
    ;; (if (args:get-arg "-daemonize")
    ;;     (begin
    ;;       (daemon:ize)
    ;;       (if *alt-log-file* ;; we should re-connect to this port, I think daemon:ize disrupts it
    ;;           (begin
    ;;     	(current-error-port *alt-log-file*)
    ;;     	(current-output-port *alt-log-file*)))))
    (if (server:check-if-running run-id)
	(begin
	  (debug:print-info 0 "Server for run-id " run-id " already running")
	  (exit 0)))
    (let loop ((server-id (tasks:server-lock-slot (db:delay-if-busy tdbdat) run-id))
	       (remtries  4))
      (if (not server-id)
	  (if (> remtries 0)
	      (begin
		(thread-sleep! 2)
		(if (not (server:check-if-running run-id))
		    (loop (tasks:server-lock-slot (db:delay-if-busy tdbdat) run-id)
			  (- remtries 1))
		    (begin
		      (debug:print-info 0 "Another server took the slot, exiting")
		      (exit 0))))
	      (begin
		;; since we didn't get the server lock we are going to clean up and bail out
		(debug:print-info 2 "INFO: server pid=" (current-process-id) ", hostname=" (get-host-name) " not starting due to other candidates ahead in start queue")
		(tasks:server-delete-records-for-this-pid (db:delay-if-busy tdbdat) " http-transport:launch")
		))
	  ;; locked in a server id, try to start up
	  (nmsg-transport:run dbstruct hostn run-id server-id))
      (set! *didsomething* #t)
      (exit))))

;;======================================================================
;; S E R V E R   U T I L I T I E S 
;;======================================================================

(define (nmsg-transport:mk-signature)
  (message-digest-string (md5-primitive) 
			 (with-output-to-string
			   (lambda ()
			     (write (list (current-directory)
					  (argv)))))))

;;======================================================================
;; C L I E N T S
;;======================================================================

;; ping the server at host:port
;;   return the open socket if successful (return-socket == #t)
;;   expect the key expected-key returned in payload
;;   send our-key or #f as payload
;;
(define (nmsg-transport:ping hostn port #!key (timeout 3)(return-socket #t)(expected-key #f)(our-key #f)(socket #f))
  ;; send a random number along with pid and check that we get it back
  (let* ((host    (if (or (not hostn)
			  (equal? hostn "-")) ;; use localhost
		      (get-host-name)
		      hostn))
	 (req     (or socket
		      (let ((soc (nn-socket 'req)))
			(nn-connect soc (conc "tcp://" host ":" port))
			soc)))
	 (success #t)
	 (dat     (vector "ping" our-key))
	 (result  (condition-case 
		   (nmsg-transport:client-api-send-receive-raw req dat timeout: timeout)
		   ((timeout)(set! success #f) #f)))
	 (key     (if success 
		      (vector-ref result 1)
		      #f)))
    (debug:print 0 "success=" success ", key=" key ", expected-key=" expected-key ", equal? " (equal? key expected-key))
    (if (and success
	     (or (not expected-key) ;; just getting a reply is good enough then
		 (equal? key expected-key)))
	(if return-socket
	    req
	    (begin
	      (if (not socket)(nn-close req)) ;; don't want a side effect of closing socket if handed it
	      #t))
	(begin
	  (if (not socket)(nn-close req)) ;; failed to ping, close socket as side effect
	  #f))))

;; send data to server, wait max of timeout seconds for a response.
;; return #( success/fail result )
;;
;; for effiency it is easier to do the obj->string and string->obj here.
;;
(define (nmsg-transport:client-api-send-receive-raw socreq indat #!key (enable-send #t)(timeout 25))
  (let* ((success     #f)
	 (result      #f)
	 (keepwaiting #t)
	 (dat         (db:obj->string indat transport: 'nmsg))
	 (send-recv   (make-thread
		       (lambda ()
			 (nn-send socreq dat)
			 (let* ((res (nn-recv socreq)))
			   (set! success #t)
			   (set! result (db:string->obj res transport: 'nmsg))))
		       "send-recv"))
	 (timeout     (make-thread
		       (lambda ()
			 (let loop ((count 0))
			   (thread-sleep! 1)
			   (debug:print-info 1 "send-receive-raw, still waiting after " count " seconds...")
			   (if (and keepwaiting (< count timeout)) ;; yes, this is very aproximate
			       (loop (+ count 1))))
			 (if keepwaiting
			     (begin
			       (print "timeout waiting for ping")
			       (thread-terminate! send-recv))))
		       "timeout")))
    ;; replace with condition-case?
    (handle-exceptions
     exn
     (set! result "timeout")
     (thread-start! timeout)
     (thread-start! send-recv)
     (thread-join! send-recv)
     (if success (thread-terminate! timeout)))
    ;; raise timeout error if timed out
    (if success
	(if (and (vector? result)
		 (vector-ref result 0)) ;; did it fail at the server?
	    result                ;; nope, all good
	    (begin
	      (debug:print 0 "ERROR: error occured at server, info=" (vector-ref result 2))
	      (debug:print 0 " client call chain:")
	      (print-call-chain (current-error-port))
	      (debug:print 0 " server call chain:")
	      (pp (vector-ref result 1) (current-error-port))
	      (signal (vector-ref result 0))))
	(signal (make-composite-condition
		 (make-property-condition 'timeout 'message "nmsg-transport:client-api-send-receive-raw timed out talking to server"))))))

;; run nmsg-transport:keep-running in a parallel thread to monitor that the db is being 
;; used and to shutdown after sometime if it is not.
;;
(define (nmsg-transport:keep-running server-id run-id)
  ;; if none running or if > 20 seconds since 
  ;; server last used then start shutdown
  ;; This thread waits for the server to come alive
  (let* ((server-info (let loop ()
                        (let ((sdat #f))
                          (mutex-lock! *heartbeat-mutex*)
                          (set! sdat *server-info*)
                          (mutex-unlock! *heartbeat-mutex*)
                          (if sdat 
			      (begin
				(debug:print-info 0 "keep-running got sdat=" sdat)
				sdat)
                              (begin
                                (thread-sleep! 0.5)
                                (loop))))))
         (iface       (car server-info))
         (port        (cadr server-info))
         (last-access 0)
	 (tdbdat      (tasks:open-db))
	 (server-timeout (let ((tmo (configf:lookup  *configdat* "server" "timeout")))
			   (if (and (string? tmo)
				    (string->number tmo))
			       (* 60 60 (string->number tmo))
			       ;; (* 3 24 60 60) ;; default to three days
			       (* 60 1)         ;; default to one minute
			       ;; (* 60 60 25)      ;; default to 25 hours
			       ))))
    (print "Keep-running got server pid " server-id ", using iface " iface " and port " port)
    (let loop ((count 0))
      (thread-sleep! 4) ;; no need to do this very often
      ;; NB// sync currently does NOT return queue-length
      (let () ;; (queue-len (cdb:client-call server-info 'sync #t 1)))
      ;; (print "Server running, count is " count)
        (if (< count 1) ;; 3x3 = 9 secs aprox
            (loop (+ count 1)))
        
        (mutex-lock! *heartbeat-mutex*)
        (set! last-access *last-db-access*)
        (mutex-unlock! *heartbeat-mutex*)
	(db:sync-touched *inmemdb* run-id force-sync: #t)
        (if (and *server-run*
	       (> (+ last-access server-timeout)
		  (current-seconds)))
            (begin
              (debug:print-info 0 "Server continuing, seconds since last db access: " (- (current-seconds) last-access))
              (loop 0))
            (begin
              (debug:print-info 0 "Starting to shutdown the server.")
              (set! *time-to-exit* #t)
	      (db:sync-touched *inmemdb* run-id force-sync: #t)
              (tasks:server-delete-record (db:delay-if-busy tdbdat) server-id " http-transport:keep-running")
              (debug:print-info 0 "Server shutdown complete. Exiting")
              (exit)
	      ))))))

;;======================================================================
;; C L I E N T S
;;======================================================================

(define (nmsg-transport:client-connect iface portnum)
  (let* ((reqsoc      (nmsg-transport:ping iface portnum return-socket: #t)))
    (vector iface portnum #f #f #f (current-seconds) reqsoc)))

;; returns result, there is no sucess/fail flag - handled via excpections
;;
(define (nmsg-transport:client-api-send-receive run-id connection-info cmd param #!key (remtries 5))
  ;; NB// In the html version of this routine there is a call to 
  ;;      tasks:kill-server-run-id when there is an exception
  (mutex-lock! *http-mutex*)
  (let* ((packet  (vector cmd param))
	 (reqsoc  (http-transport:server-dat-get-socket connection-info))
	 (res     (nmsg-transport:client-api-send-receive-raw reqsoc packet)))
;;	 (status  (vector-ref rawres 0))
;;	 (result  (vector-ref rawres 1)))
    (mutex-unlock! *http-mutex*)
    res)) ;; (vector status (if status (db:string->obj result transport: 'nmsg) result))))
	
;;======================================================================
;; J U N K 
;;======================================================================

;; DO NOT USE
;;
(define (nmsg-transport:client-signal-handler signum)
  (handle-exceptions
   exn
   (debug:print " ... exiting ...")
   (let ((th1 (make-thread (lambda ()
			     (if (not *received-response*)
				 (receive-message* *runremote*))) ;; flush out last call if applicable
			   "eat response"))
	 (th2 (make-thread (lambda ()
			     (debug:print 0 "ERROR: Received ^C, attempting clean exit. Please be patient and wait a few seconds before hitting ^C again.")
			     (thread-sleep! 3) ;; give the flush three seconds to do it's stuff
			     (debug:print 0 "       Done.")
			     (exit 4))
			   "exit on ^C timer")))
     (thread-start! th2)
     (thread-start! th1)
     (thread-join! th2))))

(use json format)

(declare (unit rmt))
(declare (uses api))
(declare (uses tdb))
(declare (uses http-transport))
(declare (uses nmsg-transport))

;;
;; THESE ARE ALL CALLED ON THE CLIENT SIDE!!!
;;

;; ;; For debugging add the following to ~/.megatestrc
;;
;; (require-library trace)
;; (import trace)
;; (trace
;; rmt:send-receive
;; api:execute-requests
;; )


;;======================================================================
;;  S U P P O R T   F U N C T I O N S
;;======================================================================

(define (rmt:call-transport run-id connection-info cmd jparams)
  (case (server:get-transport)
    ((rpc)  ( rpc-transport:client-api-send-receive run-id connection-info cmd jparams))
    ((http) (http-transport:client-api-send-receive run-id connection-info cmd jparams))
    ((fs)   ( fs-transport:client-api-send-receive run-id connection-info cmd jparams))
    ((zmq)  (zmq-transport:client-api-send-receive run-id connection-info cmd jparams))
    (else   ( rpc-transport:client-api-send-receive run-id connection-info cmd jparams))))
;; #t means - please start a server!

;;
(define (rmt:write-frequency-over-limit? cmd run-id)
  (and (not (member cmd api:read-only-queries))
       (let* ((tmprec (hash-table-ref/default *write-frequency* run-id #f))
	      (record (if tmprec tmprec 
			  (let ((v (vector (current-seconds) 0)))
			    (hash-table-set! *write-frequency* run-id v)

	cinfo
	;; NB// can cache the answer for server running for 10 seconds ...
	;;  ;; (and (not (rmt:write-frequency-over-limit? cmd run-id))
	(if (tasks:server-running-or-starting? (db:delay-if-busy (tasks:open-db)) run-id)
	    (client:setup run-id)
	    #f))))

;; cmd is a symbol
(define *send-receive-mutex* (make-mutex)) ;; should have separate mutex per run-id
;; vars is a json string encoding the parameters for the call
;;
(define (rmt:send-receive cmd rid params #!key (attemptnum 0))
(define (rmt:send-receive cmd rid params #!key (attemptnum 1)) ;; start attemptnum at 1 so the modulo below works as expected
  ;; clean out old connections
  (mutex-lock! *db-multi-sync-mutex*)
  (let ((expire-time (- (current-seconds) 60)))
  (let ((expire-time (- (current-seconds) (server:get-timeout) 10))) ;; don't forget the 10 second margin
    (for-each 
     (lambda (run-id)
       (let ((connection (hash-table-ref/default *runremote* run-id #f)))
	 (if (and connection 
		  (< (http-transport:server-dat-get-last-access connection) expire-time))
	     (begin
	       (debug:print-info 0 "Discarding connection to server for run-id " run-id ", too long between accesses")
	       (hash-table-delete! *runremote* run-id)))))
         (if (and connection 
        	  (< (http-transport:server-dat-get-last-access connection) expire-time))
             (begin
               (debug:print-info 0 "Discarding connection to server for run-id " run-id ", too long between accesses")
               ;; SHOULD CLOSE THE CONNECTION HERE
	       (case *transport-type*
		 ((nmsg)(nn-close (http-transport:server-dat-get-socket 
				   (hash-table-ref *runremote* run-id)))))
               (hash-table-delete! *runremote* run-id)))))
     (hash-table-keys *runremote*)))
  (mutex-unlock! *db-multi-sync-mutex*)
  ;; (mutex-lock! *send-receive-mutex*)
  (let* ((run-id          (if rid rid 0))
	 (connection-info (rmt:get-connection-info run-id))
	 (connection-info (rmt:get-connection-info run-id)))
	 (jparams         (db:obj->string params)))
    ;; the nmsg method does the encoding under the hood (the http method should be changed to do this also)
    (if connection-info
	;; use the server if have connection info
	(let* ((dat     (case *transport-type*
			  ((http)(condition-case
	(let* ((dat     (http-transport:client-api-send-receive run-id connection-info cmd jparams))
	       (res     (if (and dat (vector? dat)) (vector-ref dat 1) #f))
	       (success (if (and dat (vector? dat)) (vector-ref dat 0) #f)))
				  (http-transport:client-api-send-receive run-id connection-info cmd params)
				  ((commfail)(vector #f "communications fail"))))
			  ((nmsg)(condition-case
				  (nmsg-transport:client-api-send-receive run-id connection-info cmd params)
				  ((timeout)(vector #f "timeout talking to server"))))
			  (else  (exit))))
	       (success (if (and dat (vector? dat)) (vector-ref dat 0) #f))
	       (res     (if (and dat (vector? dat)) (vector-ref dat 1) #f)))
	  (http-transport:server-dat-update-last-access connection-info)
	  (if success
	      (db:string->obj res)
	      ;; (if (< attemptnum 100)
	      ;;     (begin
	      (begin
	      ;;       (hash-table-delete! *runremote* run-id)
	      ;;       (thread-sleep! 0.5)
	      ;;       (rmt:send-receive cmd rid params attempnum: (+ attemptnum 1)))
	      ;;     (begin
		;; (mutex-unlock! *send-receive-mutex*)
		(case *transport-type* 
		  ((http) res) ;; (db:string->obj res))
	      ;;       (print-call-chain (current-error-port))
	      ;;       (debug:print 0 "ERROR: too many attempts to communicate have failed. Giving up. Kill your mtest processes and start over")
	      ;;       (exit 1)))))
		  ((nmsg) res))) ;; (vector-ref res 1)))
	      (begin ;; let ((new-connection-info (client:setup run-id)))
		(debug:print 0 "WARNING: Communication failed, trying call to http-transport:client-api-send-receive again.")
		(debug:print 0 "WARNING: Communication failed, trying call to rmt:send-receive again.")
		;; (case *transport-type*
		;;   ((nmsg)(nn-close (http-transport:server-dat-get-socket connection-info))))
		(hash-table-delete! *runremote* run-id) ;; don't keep using the same connection
		(if (eq? (modulo attemptnum 5) 0)
		    (tasks:kill-server-run-id run-id tag: "api-send-receive-failed"))
		;; (mutex-unlock! *send-receive-mutex*) ;; close the mutex here to allow other threads access to communications
		(tasks:start-and-wait-for-server (tasks:open-db) run-id 15)
		;; (nmsg-transport:client-api-send-receive run-id connection-info cmd param remtries: (- remtries 1))))))

		;; no longer killing the server in http-transport:client-api-send-receive
		;; may kill it here but what are the criteria?
		;; start with three calls then kill server
		(if (eq? attemptnum 3)(tasks:kill-server-run-id run-id))
		(thread-sleep! 2)
		;; (if (eq? attemptnum 3)(tasks:kill-server-run-id run-id))
		;; (thread-sleep! 2)
		(rmt:send-receive cmd run-id params attemptnum: (+ attemptnum 1)))))
	;; no connection info? try to start a server
	(if (and (< attemptnum 10)
	(if (and (< attemptnum 15)
		 (tasks:need-server run-id))
	    (begin
	      (hash-table-delete! *runremote* run-id)
	      ;; (mutex-unlock! *send-receive-mutex*)
	      (tasks:start-and-wait-for-server (db:delay-if-busy (tasks:open-db)) run-id 10)
	      (client:setup run-id)
	      (thread-sleep! (random 5)) ;; give some time to settle and minimize collison?
	      (rmt:send-receive cmd rid params (+ attemptnum 1)))
	    (rmt:open-qry-close-locally cmd run-id params)))))
	      (rmt:send-receive cmd rid params attemptnum: (+ attemptnum 1)))
	    (begin
	      ;; (debug:print 0 "ERROR: Communication failed!")
	      ;; (mutex-unlock! *send-receive-mutex*)
	      ;; (exit)
	      (rmt:open-qry-close-locally cmd run-id params)
	      )))))

(define (rmt:update-db-stats run-id rawcmd params duration)
  (mutex-lock! *db-stats-mutex*)
  (handle-exceptions
   exn
   (begin
     (debug:print 0 "WARNING: stats collection failed in update-db-stats")

			     (let* ((dbdir (conc    (configf:lookup *configdat* "setup" "linktree") "/.db"))
				    (db (make-dbr:dbstruct path:  dbdir local: #t)))
			       (set! *dbstruct-db* db)
			       db)))
	 (db-file-path   (db:dbfile-path 0)))
    ;; (read-only      (not (file-read-access? db-file-path)))
    (let* ((start         (current-milliseconds))
	   (res           (api:execute-requests dbstruct-local (symbol->string cmd) params))
	   (resdat        (api:execute-requests dbstruct-local (vector (symbol->string cmd) params)))
	   (res           (vector-ref resdat 1))
	   (duration      (- (current-milliseconds) start)))
      (rmt:update-db-stats run-id cmd params duration)
      ;; mark this run as dirty if this was a write
      (if (not (member cmd api:read-only-queries))
	  (let ((start-time (current-seconds)))
	    (mutex-lock! *db-multi-sync-mutex*)
	    ;; (if (not (hash-table-ref/default *db-local-sync* run-id #f))
	    ;; just set it every time. Is a write more expensive than a read and does it matter?
	    (hash-table-set! *db-local-sync* (or run-id 0) 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))
	 (dat      (http-transport:client-api-send-receive run-id connection-info cmd jparams)))
    (if (and dat (vector-ref dat 0))
	(db:string->obj (vector-ref dat 1))
	(begin
	  (debug:print 0 "ERROR: rmt:send-receive-no-auto-client-setup failed, attempting to continue. Got " dat)
	  dat))))
	 ;; (jparams  (db:obj->string params)) ;; (rmt:dat->json-str params))
	 (res  	   (http-transport:client-api-send-receive run-id connection-info cmd params)))
    (if (and res (vector-ref res 0))
	res
	#f)))
;; 	(db:string->obj (vector-ref dat 1))
;; 	(begin
;; 	  (debug:print 0 "ERROR: rmt:send-receive-no-auto-client-setup failed, attempting to continue. Got " dat)
;; 	  dat))))

;; Wrap json library for strings (why the ports crap in the first place?)
(define (rmt:dat->json-str dat)
  (with-output-to-string 
    (lambda ()
      (json-write dat))))

;;  M I S C
;;======================================================================

(define (rmt:login run-id)
  (rmt:send-receive 'login run-id (list *toppath* megatest-version run-id *my-client-signature*)))

;; This login does no retries under the hood - it acts a bit like a ping.
;; Deprecated for nmsg-transport.
;;
(define (rmt:login-no-auto-client-setup connection-info run-id)
  (case *transport-type*
  (rmt:send-receive-no-auto-client-setup connection-info 'login run-id (list *toppath* megatest-version run-id *my-client-signature*)))
  
    ((http)(rmt:send-receive-no-auto-client-setup connection-info 'login run-id (list *toppath* megatest-version run-id *my-client-signature*)))
    ((nmsg)(nmsg-transport:client-api-send-receive run-id connection-info 'login (list *toppath* megatest-version run-id *my-client-signature*)))))

;; hand off a call to one of the db:queries statements
;; added run-id to make looking up the correct db possible 
;;
(define (rmt:general-call stmtname run-id . params)
  (rmt:send-receive 'general-call run-id (append (list stmtname run-id) params)))

(define (rmt:sync-inmem->db run-id)

  (let ((multi-run-mutex (make-mutex))
	(run-id-list (if run-ids
			 run-ids
			 (rmt:get-all-run-ids)))
	(result      '()))
    (if (null? run-id-list)
	'()
	(for-each 
	 (lambda (th)

	   (thread-join! th)) ;; I assume that joining completed threads just moves on
	 (let loop ((hed     (car run-id-list))
		    (tal     (cdr run-id-list))
		    (threads '()))
	   (let* ((newthread (make-thread
			      (lambda ()
				(let ((res (rmt:send-receive 'get-tests-for-run-mindata hed (list hed testpatt states status not-in))))
				  (if (list? res)
				      (begin
					(mutex-lock! multi-run-mutex)
					(set! result (append result res))
					(mutex-unlock! multi-run-mutex))
				      (debug:print 0 "ERROR: get-tests-for-run-mindata failed for run-id " hed ", testpatt " testpatt ", states " states ", status " status ", not-in " not-in))))
			      (conc "multi-run-thread for run-id " hed)))
		  (newthreads (cons newthread threads)))
	     (thread-start! newthread)
	     (thread-sleep! 0.5) ;; give that thread some time to start
	     (if (null? tal)
		 newthreads
		 (loop (car tal)(cdr tal) newthreads))))))
	(let loop ((hed     (car run-id-list))
		   (tal     (cdr run-id-list))
		   (threads '()))
	  (if (> (length threads) 5)
	      (loop hed tal (filter (lambda (th)(not (member (thread-state th) '(terminated dead)))) threads))
	      (let* ((newthread (make-thread
				 (lambda ()
				   (let ((res (rmt:send-receive 'get-tests-for-run-mindata hed (list hed testpatt states status not-in))))
				     (if (list? res)
					 (begin
					   (mutex-lock! multi-run-mutex)
					   (set! result (append result res))
					   (mutex-unlock! multi-run-mutex))
					 (debug:print 0 "ERROR: get-tests-for-run-mindata failed for run-id " hed ", testpatt " testpatt ", states " states ", status " status ", not-in " not-in))))
				 (conc "multi-run-thread for run-id " hed)))
		     (newthreads (cons newthread threads)))
		(thread-start! newthread)
		(thread-sleep! 0.5) ;; give that thread some time to start
		(if (null? tal)
		    newthreads
		    (loop (car tal)(cdr tal) newthreads))))))
    result))

;; ;; IDEA: Threadify these - they spend a lot of time waiting ...
;; ;;
;; (define (rmt:get-tests-for-runs-mindata run-ids testpatt states status not-in)
;;   (let ((run-id-list (if run-ids
;; 			 run-ids

  (rmt:send-receive 'testmeta-update-field #f (list test-name fld val)))

(define (rmt:test-data-rollup run-id test-id status)
  (rmt:send-receive 'test-data-rollup run-id (list run-id test-id status)))

(define (rmt:csv->test-data run-id test-id csvdata)
  (rmt:send-receive 'csv->test-data run-id (list run-id test-id csvdata)))

;;======================================================================
;;  T A S K S
;;======================================================================

(define (rmt:tasks-find-task-queue-records target run-name test-patt state-patt action-patt)
  (rmt:send-receive 'find-task-queue-records #f (list target run-name test-patt state-patt action-patt)))

(define (rmt:tasks-add action owner target runname testpatt params)
  (rmt:send-receive 'tasks-add #f (list action owner target runname testpatt params)))

(define (rmt:tasks-set-state-given-param-key param-key new-state)
  (rmt:send-receive 'tasks-set-state-given-param-key #f (list  param-key new-state)))

;; Copyright 2006-2012, Matthew Welland.
;; 
;;  This program is made available under the GNU GPL version 2.0 or
;;  greater. See the accompanying file COPYING for details.
;; 
;;  This program is distributed WITHOUT ANY WARRANTY; without even the
;;  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
;;  PURPOSE.

(require-extension (srfi 18) extras tcp s11n rpc)
(import (prefix rpc rpc:))

(use sqlite3 srfi-1 posix regex regex-case srfi-69 hostinfo md5 message-digest)
(import (prefix sqlite3 sqlite3:))

(declare (unit rpc-transport))

(declare (uses common))
(declare (uses db))
(declare (uses tests))
(declare (uses tasks)) ;; tasks are where stuff is maintained about what is running.

(include "common_records.scm")
(include "db_records.scm")

;; procstr is the name of the procedure to be called as a string
(define (rpc-transport:autoremote procstr params)
  (handle-exceptions
   exn
   (begin
     (debug:print 1 "Remote failed for " proc " " params)
     (apply (eval (string->symbol procstr)) params))
   ;; (if *runremote*
   ;;    (apply (eval (string->symbol (conc "remote:" procstr))) params)
   (apply (eval (string->symbol procstr)) params)))

;; all routes though here end in exit ...
;;
;; start_server? 
;;
(define (rpc-transport:launch run-id)
  (set! *run-id*   run-id)
  (if (args:get-arg "-daemonize")
      (daemon:ize))
  (if (server:check-if-running run-id)
      (begin
	(debug:print 0 "INFO: Server for run-id " run-id " already running")
	(exit 0)))
  (let loop ((server-id (open-run-close tasks:server-lock-slot tasks:open-db run-id))
	     (remtries  4))
    (if (not server-id)
	(if (> remtries 0)
	    (begin
	      (thread-sleep! 2)
	      (loop (open-run-close tasks:server-lock-slot tasks:open-db run-id)
		    (- remtries 1)))
	    (begin
	      ;; since we didn't get the server lock we are going to clean up and bail out
	      (debug:print-info 2 "INFO: server pid=" (current-process-id) ", hostname=" (get-host-name) " not starting due to other candidates ahead in start queue")
	      (open-run-close tasks:server-delete-records-for-this-pid tasks:open-db " rpc-transport:launch")))
	(begin
	  (rpc-transport:run (if (args:get-arg "-server")(args:get-arg "-server") "-") run-id server-id)
	  (exit)))))

(define (rpc-transport:run hostn run-id server-id)
  (debug:print 2 "Attempting to start the rpc server ...")
   ;; (trace rpc:publish-procedure!)

  (rpc:publish-procedure! 'server:login server:login)
  (rpc:publish-procedure! 'testing (lambda () "Just testing"))

  (let* ((db              #f)
	 (hostname        (get-host-name))
	 (ipaddrstr       (let ((ipstr (if (string=? "-" hostn)
					   ;; (string-intersperse (map number->string (u8vector->list (hostname->ip hostname))) ".")
					   (server:get-best-guess-address hostname)
					   #f)))
			    (if ipstr ipstr hostn))) ;; hostname))) 
	 (start-port      (open-run-close tasks:server-get-next-port tasks:open-db))
	 (link-tree-path  (configf:lookup *configdat* "setup" "linktree"))
	 (rpc:listener    (rpc-transport:find-free-port-and-open (rpc:default-server-port)))
	 (th1             (make-thread
			   (lambda ()
			     ((rpc:make-server rpc:listener) #t))
			   "rpc:server"))
			   ;; (cute (rpc:make-server rpc:listener) "rpc:server")
			   ;; 'rpc:server))
	 (hostname        (if (string=? "-" hostn)
			      (get-host-name) 
			      hostn))
	 (ipaddrstr       (if (string=? "-" hostn)
			      (server:get-best-guess-address hostname) ;; (string-intersperse (map number->string (u8vector->list (hostname->ip hostname))) ".")
			      #f))
	 (portnum         (rpc:default-server-port))
	 (host:port       (conc (if ipaddrstr ipaddrstr hostname) ":" portnum))
	 (tdb             (tasks:open-db)))
    (thread-start! th1)
    (set! db *inmemdb*)
    (open-run-close tasks:server-set-interface-port 
		    tasks:open-db 
		    server-id 
		    ipaddrstr portnum)
    (debug:print 0 "Server started on " host:port)
    
    ;; (trace rpc:publish-procedure!)
    ;; (rpc:publish-procedure! 'server:login server:login)
    ;; (rpc:publish-procedure! 'testing (lambda () "Just testing"))

    ;;======================================================================
    ;;	  ;; end of publish-procedure section
    ;;======================================================================
    ;;
    (on-exit (lambda ()
	       (open-run-close tasks:server-set-state! tasks:open-db server-id "stopped")))

    (set! *rpc:listener* rpc:listener)
    (tasks:server-set-state! tdb server-id "running")
    (set! *inmemdb*  (db:setup run-id))
    ;; if none running or if > 20 seconds since 
    ;; server last used then start shutdown
    (let loop ((count 0))
      (thread-sleep! 5) ;; no need to do this very often
      (let ((numrunning -1)) ;; (db:get-count-tests-running db)))
	(if (or (> numrunning 0)
		(> (+ *last-db-access* 60)(current-seconds)))
	    (begin
	      (debug:print-info 0 "Server continuing, tests running: " numrunning ", seconds since last db access: " (- (current-seconds) *last-db-access*))
	      (loop (+ 1 count)))
	    (begin
	      (debug:print-info 0 "Starting to shutdown the server side")
	      (open-run-close tasks:server-delete-record tasks:open-db server-id " rpc-transport:try-start-server stop")
	      (thread-sleep! 10)
	      (debug:print-info 0 "Max cached queries was " *max-cache-size*)
	      (debug:print-info 0 "Server shutdown complete. Exiting")
	      ))))))

(define (rpc-transport:find-free-port-and-open port)
  (handle-exceptions
   exn
	  (begin
     (print "Failed to bind to port " (rpc:default-server-port) ", trying next port")
     (rpc-transport:find-free-port-and-open (+ port 1)))
   (rpc:default-server-port port)
   (tcp-read-timeout 240000)
   (tcp-listen (rpc:default-server-port) 10000)))

(define (rpc-transport:ping run-id host port)
  (handle-exceptions
   exn
   (begin
     (print "SERVER_NOT_FOUND")
     (exit 1))
   (let ((login-res ((rpc:procedure 'server:login host port) *toppath*)))
     (if (and (list? login-res)
	      (car login-res))
	 (begin
	   (print "LOGIN_OK")
	   (exit 0))
	 (begin
	   (print "LOGIN_FAILED")
	   (exit 1))))))

(define (rpc-transport:client-setup run-id #!key (remtries 10))
  (if *runremote*
      (begin
	(debug:print 0 "ERROR: Attempt to connect to server but already connected")
	#f)
      (let* ((host-info (hash-table-ref/default *runremote* run-id #f))) ;; (open-run-close db:get-var #f "SERVER"))
	(if host-info
	    (let ((iface    (car host-info))
		  (port     (cadr host-info))
		  (ping-res ((rpc:procedure 'server:login host port) *toppath*)))
	      (if ping-res
		  (let ((server-dat (list iface port #f #f #f)))
		    (hash-table-set! *runremote* run-id server-dat)
		    server-dat)
		  (begin
		    (server:try-running run-id)
		    (thread-sleep! 2)
		    (rpc-transport:client-setup run-id (- remtries 1)))))
 	    (let* ((server-db-info (open-run-close tasks:get-server tasks:open-db run-id)))
 	      (debug:print-info 0 "client:setup server-dat=" server-dat ", remaining-tries=" remaining-tries)
	      (if server-db-info
 		  (let* ((iface     (tasks:hostinfo-get-interface server-db-info))
 			 (port      (tasks:hostinfo-get-port      server-db-info))
			 (server-dat (list iface port #f #f #f))
 			 (ping-res  ((rpc:procedure 'server:login host port) *toppath*)))
 		    (if start-res
 			(begin
 			  (hash-table-set! *runremote* run-id server-dat)
			  server-dat)
			(begin
			  (server:try-running run-id)
			  (thread-sleep! 2)
			  (rpc-transport:client-setup run-id (- remtries 1)))))
		  (begin
		    (server:try-running run-id)
		    (thread-sleep! 2)
		    (rpc-transport:client-setup run-id (- remtries 1)))))))))
;; 
;; 	     (port     (if (and hostinfo (> (length hostdat) 1))(cadr hostdat) #f)))
;; 	(if (and port
;; 		 (string->number port))
;; 	    (let ((portn (string->number port)))
;; 	      (debug:print-info 2 "Setting up to connect to host " host ":" port)
;; 	      (handle-exceptions
;; 	       exn
;; 	       (begin
;; 		 (debug:print 0 "ERROR: Failed to open a connection to the server at host: " host " port: " port)
;; 		 (debug:print 0 "   EXCEPTION: " ((condition-property-accessor 'exn 'message) exn))
;; 		 ;; (open-run-close 
;; 		 ;;  (lambda (db . param) 
;; 		 ;;    (sqlite3:execute db "DELETE FROM metadat WHERE var='SERVER'"))
;; 		 ;;  #f)
;; 		 (set! *runremote* #f))
;; 	       (if (and (not (args:get-arg "-server")) ;; no point in the server using the server using the server
;; 			((rpc:procedure 'server:login host portn) *toppath*))
;; 		   (begin
;; 		     (debug:print-info 2 "Logged in and connected to " host ":" port)
;; 		     (set! *runremote* (vector host portn)))
;; 		   (begin
;; 		     (debug:print-info 2 "Failed to login or connect to " host ":" port)
;; 		     (set! *runremote* #f)))))
;; 	    (debug:print-info 2 "no server available")))))

    (if (tasks:need-server run-id)(tasks:start-and-wait-for-server tdbdat run-id 10))

    (set-signal-handler! signal/int
			 (lambda (signum)
			   (signal-mask! signum)
			   (print "Received signal " signum ", cleaning up before exit. Please wait...")
			   (let ((tdbdat (tasks:open-db)))
			     (tasks:set-state-given-param-key (db:delay-if-busy tdbdat) task-key "killed"))
			     (rmt:tasks-set-state-given-param-key task-key "killed"))
			   (print "Killed by signal " signum ". Exiting")
			   (exit)))

    ;; register this run in monitor.db
    (tasks:add (db:delay-if-busy tdbdat) "run-tests" user target runname test-patts task-key) ;; params)
    (tasks:set-state-given-param-key (db:delay-if-busy tdbdat) task-key "running")
    (rmt:tasks-add "run-tests" user target runname test-patts task-key) ;; params)
    (rmt:tasks-set-state-given-param-key task-key "running")
    (runs:set-megatest-env-vars run-id inkeys: keys inrunname: runname) ;; these may be needed by the launching process
    (if (file-exists? runconfigf)
	(setup-env-defaults runconfigf run-id *already-seen-runconfig-info* keyvals target)
	(debug:print 0 "WARNING: You do not have a run config file: " runconfigf))

    ;; Now generate all the tests lists
    (set! all-tests-registry (tests:get-all))

		  (if (not (hash-table-ref/default flags "-preclean" #f))
		      (hash-table-set! flags "-preclean" #t))
		  (if (not (hash-table-ref/default flags "-rerun" #f))
		      (hash-table-set! flags "-rerun" "STUCK/DEAD,n/a,ZERO_ITEMS"))
		  (runs:run-tests target runname test-patts user flags run-count: (- run-count 1)))))
	  (debug:print-info 0 "No tests to run")))
    (debug:print-info 4 "All done by here")
    (tasks:set-state-given-param-key (db:delay-if-busy tdbdat) task-key "done")
    (rmt:tasks-set-state-given-param-key (db:delay-if-busy tdbdat) task-key "done")
    ;; (sqlite3:finalize! tasks-db)
    ))


;; loop logic. These are used in runs:run-tests-queue to make it a bit more readable.
;;
;; If reg not full and have items in tal then loop with (car tal)(cdr tal) reg reruns

	     (newtal      (append tal (list hed)))
	     (regfull     (>= (length reg) reglen))
	     (num-running (rmt:get-count-tests-running-for-run-id run-id)))

	;; every couple minutes verify the server is there for this run
	(if (and (common:low-noise-print 60 "try start server"  run-id)
		 (tasks:need-server run-id))
	    (tasks:start-and-wait-for-server tdbdat run-id 10))
	    (tasks:start-and-wait-for-server tdbdat run-id 10)) ;; NOTE: delay and wait is done under the hood
	
	(if (> num-running 0)
	  (set! last-time-some-running (current-seconds)))

      (if (> (current-seconds)(+ last-time-some-running 240))
	  (hash-table-set! *max-tries-hash* tfullname (+ (hash-table-ref/default *max-tries-hash* tfullname 0) 1)))
	;; (debug:print 0 "max-tries-hash: " (hash-table->alist *max-tries-hash*))

	   (if (not (null? tests))
	       (begin
		 (case action
		   ((remove-runs)
		    (if (tasks:need-server run-id)(tasks:start-and-wait-for-server tdbdat run-id 10))
		    ;; seek and kill in flight -runtests with % as testpatt here
		    (if (equal? testpatt "%")
			(tasks:kill-runner (db:delay-if-busy tdbdat) target run-name)
			(tasks:kill-runner target run-name)
			(debug:print 0 "not attempting to kill any run launcher processes as testpatt is " testpatt))
		    (debug:print 1 "Removing tests for run: " runkey " " (db:get-value-by-header run header "runname")))
		   ((set-state-status)
		    (if (tasks:need-server run-id)(tasks:start-and-wait-for-server tdbdat run-id 10))
		    (debug:print 1 "Modifying state and staus for tests for run: " runkey " " (db:get-value-by-header run header "runname")))
		   ((print-run)
		    (debug:print 1 "Printing info for run " runkey ", run=" run ", tests=" tests ", header=" header)

(declare (unit server))

(declare (uses common))
(declare (uses db))
(declare (uses tasks)) ;; tasks are where stuff is maintained about what is running.
(declare (uses synchash))
(declare (uses http-transport))
(declare (uses launch))
;; (declare (uses zmq-transport))
(declare (uses rpc-transport))
(declare (uses nmsg-transport))
(declare (uses launch))
(declare (uses daemon))

(include "common_records.scm")
(include "db_records.scm")

(define (server:make-server-url hostport)
  (if (not hostport)

;;

;; all routes though here end in exit ...
;;
;; start_server
;;
(define (server:launch run-id)
  (case *transport-type*
  (http-transport:launch run-id))

    ((http)(http-transport:launch run-id))
    ((nmsg)(nmsg-transport:launch run-id))
;;======================================================================
;; Q U E U E   M A N A G E M E N T
    ((rpc)  (rpc-transport:launch run-id))
;;======================================================================

;; We don't want to flush the queue if it was just flushed
    (else (debug:print 0 "ERROR: unknown server type " *transport-type*))))
;;       (else   (debug:print 0 "ERROR: No known transport set, transport=" transport ", using rpc")
;; 	      (rpc-transport:launch run-id)))))
(define *server:last-write-flush* (current-milliseconds))

;;======================================================================
;; S E R V E R   U T I L I T I E S 
;;======================================================================

;; Get the transport
(define (server:get-transport)
  (if *transport-type*
      *transport-type*
      (let ((ttype (string->symbol
		    (or (args:get-arg "-transport")
			(configf:lookup *configdat* "server" "transport")
			"rpc"))))
	(set! *transport-type* ttype)
	ttype)))
	    
;; Generate a unique signature for this server
(define (server:mk-signature)
  (message-digest-string (md5-primitive) 
			 (with-output-to-string
			   (lambda ()
			     (write (list (current-directory)
					  (argv)))))))


;; When using zmq this would send the message back (two step process)
;; with spiffy or rpc this simply returns the return data to be returned
;; 
(define (server:reply return-addr query-sig success/fail result)
  (debug:print-info 11 "server:reply return-addr=" return-addr ", result=" result)
  ;; (send-message pubsock target send-more: #t)
  ;; (send-message pubsock 
  (case (server:get-transport)
  (db:obj->string (vector success/fail query-sig result)))
    ((rpc)  (db:obj->string (vector success/fail query-sig result)))
    ((http) (db:obj->string (vector success/fail query-sig result)))
    ((zmq)
     (let ((pub-socket (vector-ref *runremote* 1)))
       (send-message pub-socket return-addr send-more: #t)
       (send-message pub-socket (db:obj->string (vector success/fail query-sig result)))))
    ((fs)   result)
    (else 
     (debug:print 0 "ERROR: unrecognised transport type: " *transport-type*)
     result)))

;; Given a run id start a server process    ### NOTE ### > file 2>&1 
;; if the run-id is zero and the target-host is set 
;; try running on that host
;;
(define  (server:run run-id)
  (let* ((curr-host   (get-host-name))

	  (setenv "TARGETHOST" target-host)))
    (setenv "TARGETHOST_LOGF" logfile)
    (system (conc "nbfake " cmdln))
    (unsetenv "TARGETHOST_LOGF")
    (if (get-environment-variable "TARGETHOST")(unsetenv "TARGETHOST"))
    ;; (system cmdln)
    (pop-directory)))

(define (server:get-client-signature)
  (if *my-client-signature* *my-client-signature*
      (let ((sig (server:mk-signature)))
	(set! *my-client-signature* sig)
	*my-client-signature*)))

;; kind start up of servers, wait 40 seconds before allowing another server for a given
;; run-id to be launched
(define (server:kind-run run-id)
  (let ((last-run-time (hash-table-ref/default *server-kind-run* run-id #f)))
    (if (or (not last-run-time)
	    (> (- (current-seconds) last-run-time) 30))

	       (trycount 0))
    (if server
	;; note: client:start will set *runremote*. this needs to be changed
	;;       also, client:start will login to the server, also need to change that.
	;;
	;; client:start returns #t if login was successful.
	;;
	(let ((res (case *transport-type*
	(let ((res (server:ping-server run-id 
				       (tasks:hostinfo-get-interface server)
				       (tasks:hostinfo-get-port      server))))
		     ((http)(server:ping-server run-id 
						(tasks:hostinfo-get-interface server)
						(tasks:hostinfo-get-port      server)))
		     ((nmsg)(nmsg-transport:ping (tasks:hostinfo-get-interface server)
						 (tasks:hostinfo-get-port      server)
						 timeout: 2)))))
	  ;; if the server didn't respond we must remove the record
	  (if res
	      #t
	      (begin
		(debug:print-info 0 "server at " server " not responding, removing record")
		(tasks:server-force-clean-running-records-for-run-id (db:delay-if-busy tdbdat) run-id 
				" server:check-if-running")

		(res "NOREPLY"))
       (if (eof-object? inl)
	   (case (string->symbol res)
	     ((NOREPLY)  #f)
	     ((LOGIN_OK) #t)
	     (else       #f))
	   (loop (read-line) inl))))))

(define (server:login toppath)
  (lambda (toppath)
    (set! *last-db-access* (current-seconds))
    (if (equal? *toppath* toppath)
	(begin
	  ;; (debug:print-info 2 "login successful")
	  #t)
	(begin
	  ;; (debug:print-info 2 "login failed")
	  #f))))

(define (server:get-timeout)
  (let ((tmo (configf:lookup  *configdat* "server" "timeout")))
    (if (and (string? tmo)
	     (string->number tmo))
	(* 60 60 (string->number tmo))
	;; (* 3 24 60 60) ;; default to three days
	(* 60 1)         ;; default to one minute
	;; (* 60 60 25)      ;; default to 25 hours
	)))

;;  strftime('%m/%d/%Y %H:%M:%S','now','localtime')

(use sqlite3 srfi-1 posix regex regex-case srfi-69 dot-locking format)
(import (prefix sqlite3 sqlite3:))

(declare (unit tasks))
(declare (uses db))
(declare (uses rmt))
(declare (uses common))

(include "task_records.scm")

;;======================================================================
;; Tasks db
;;======================================================================

	     (set! *db-write-access* write-access)) ;; only unset so other db's also can use this control
	 (sqlite3:set-busy-handler! mdb handler)
	 (db:set-sync mdb) ;; (sqlite3:execute mdb (conc "PRAGMA synchronous = 0;"))
	 ;;  (if (or (and (not exists)
	 ;; 	      (file-write-access? *toppath*))
	 ;; 	 (not (file-read-access? dbpath)))
	 ;;      (begin
	 ;; 
	 ;; TASKS QUEUE MOVED TO main.db
	 ;;
	 (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 '',
                                name TEXT DEFAULT '',
                                testpatt TEXT DEFAULT '',
                                keylock TEXT,
                                params TEXT,
                                creation_time TIMESTAMP,
                                execution_time TIMESTAMP);")
	 ;; (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 '',
         ;;                        name TEXT DEFAULT '',
         ;;                        testpatt TEXT DEFAULT '',
         ;;                        keylock TEXT,
         ;;                        params TEXT,
         ;;                        creation_time TIMESTAMP,
         ;;                        execution_time TIMESTAMP);")
	 (sqlite3:execute mdb "CREATE TABLE IF NOT EXISTS monitors (id INTEGER PRIMARY KEY,
                                pid INTEGER,
                                start_time TIMESTAMP,
                                last_update TIMESTAMP,
                                hostname TEXT,
                                username TEXT,
                               CONSTRAINT monitors_constraint UNIQUE (pid,hostname));")

                                  hostname TEXT,
                                  cmdline TEXT,
                                  login_time TIMESTAMP,
                                  logout_time TIMESTAMP DEFAULT -1,
                                CONSTRAINT clients_constraint UNIQUE (pid,hostname));")
	       
	       ;))
	 (sqlite3:execute mdb "DELETE FROM tasks_queue WHERE state='done' AND creation_time < ?;" (- (current-seconds)(* 24 60 60))) ;; remove older than 24 hrs
	 (set! *task-db* (cons mdb dbpath))
	 *task-db*))))

;;======================================================================
;; Server and client management
;;======================================================================

	
;; register that this server may come online (first to register goes though with the process)
(define (tasks:server-set-available mdb run-id)
  (sqlite3:execute 
   mdb 
   "INSERT INTO servers (pid,hostname,port,pubport,start_time,      priority,state,mt_version,heartbeat,   interface,transport,run_id)
                   VALUES(?, ?,       ?,   ?, strftime('%s','now'), ?,       ?,    ?,-1,?,        ?,        ?);"
   (current-process-id)       ;; pid
   (get-host-name)            ;; hostname
   -1                         ;; port
   -1                         ;; pubport
   (random 1000)              ;; priority (used a tiebreaker on get-available)
   "available"                ;; state
   (common:version-signature) ;; mt_version
   -1                         ;; interface
   "http"                     ;; transport
   (current-process-id)          ;; pid
   (get-host-name)               ;; hostname
   -1                            ;; port
   -1                            ;; pubport
   (random 1000)                 ;; priority (used a tiebreaker on get-available)
   "available"                   ;; state
   (common:version-signature)    ;; mt_version
   -1                            ;; interface
   ;; (conc (server:get-transport)) ;; transport
   (conc *transport-type*)    ;; transport
   run-id
   ))

(define (tasks:num-in-available-state mdb run-id)
  (let ((res 0))
    (sqlite3:for-each-row
     (lambda (num-in-queue)

(define (tasks:need-server run-id)
  (let ((forced (configf:lookup *configdat* "server" "required"))
	(maxqry (cdr (rmt:get-max-query-average run-id)))
	(threshold   (string->number (or (configf:lookup *configdat* "server" "server-query-threshold") "10"))))
    (cond
     (forced 
      (if (common:low-noise-print 60 run-id "server required is set")
	  (debug:print-info 0 "Server required is set, starting server."))
	  (debug:print-info 0 "Server required is set, starting server for run-id " run-id "."))
      #t)
     ((> maxqry threshold)
      (if (common:low-noise-print 60 run-id "Max query time execeeded")
	  (debug:print-info 0 "Max avg query time of " maxqry "ms exceeds limit of " threshold "ms, starting server."))
	  (debug:print-info 0 "Max avg query time of " maxqry "ms exceeds limit of " threshold "ms, server needed for run-id " run-id "."))
      #t)
     (else
      #f))))

;; try to start a server and wait for it to be available
;;
(define (tasks:start-and-wait-for-server tdbdat run-id delay-max-tries)
  ;; ensure a server is running for this run
  (let loop ((server-dat (tasks:get-server (db:delay-if-busy tdbdat) run-id))
	     (delay-time 0))
      (if (and (not server-dat)
	       (< delay-time delay-max-tries))
	  (begin
	    (if (common:low-noise-print 60 "tasks:start-and-wait-for-server" run-id)
		(debug:print 0 "Try starting server for run-id " run-id))
	    (thread-sleep! (/ (random 2000) 1000))
	    (server:kind-run run-id)
	    (thread-sleep! (min delay-time 5))
	    (thread-sleep! (min delay-time 1))
	    (loop (tasks:get-server (db:delay-if-busy tdbdat) run-id)(+ delay-time 1))))))

(define (tasks:get-all-servers mdb)
  (let ((res '()))
    (sqlite3:for-each-row
     (lambda (id pid hostname interface port pubport start-time priority state mt-version last-update transport run-id)
       ;;                       0  1     2         3      4     5          6        7     8          9          10        11     12

	  (debug:print-info 0 "Killing server " server-id " for run-id " run-id " on host " hostname " with pid " pid)
	  (tasks:kill-server hostname pid)
	  (tasks:server-delete-record (db:delay-if-busy tdbdat) server-id tag) )
	(debug:print-info 0 "No server found for run-id " run-id ", nothing to kill"))
    ;; (sqlite3:finalize! tdb)
    ))
    

;;======================================================================
;; Tasks and Task monitors
;;======================================================================

;; M O N I T O R S

;;======================================================================
;; Tasks
;;======================================================================



;;======================================================================
;; Task Monitors
;;======================================================================

(define (tasks:register-monitor db mdb)
  (let* ((pid (current-process-id))
	 (hostname (get-host-name))
	 (userinfo (user-information (current-user-id)))
	 (username (car userinfo)))
    (print "Register monitor, pid: " pid ", hostname: " hostname ", username: " username)
    (sqlite3:execute mdb "INSERT INTO monitors (pid,start_time,last_update,hostname,username) VALUES (?,strftime('%s','now'),strftime('%s','now'),?,?);"
		     pid hostname username)))

(define (tasks:get-num-alive-monitors mdb)
  (let ((res 0))
    (sqlite3:for-each-row 
     (lambda (count)
       (set! res count))
     mdb
     "SELECT count(id) FROM monitors WHERE last_update < (strftime('%s','now') - 300) AND username=?;"
     (car (user-information (current-user-id))))
    res))

;; register a task
(define (tasks:add mdb action owner target runname testpatt params)
  (sqlite3:execute mdb "INSERT INTO tasks_queue (action,owner,state,target,name,testpatt,params,creation_time,execution_time)
                       VALUES (?,?,'new',?,?,?,?,strftime('%s','now'),0);" 
		   action
		   owner
		   target
		   runname
		   testpatt
		   (if params params "")))

(define (keys:key-vals-hash->target keys key-params)
  (let ((tmp (hash-table-ref/default key-params (vector-ref (car keys) 0) "")))
    (if (> (length keys) 1)
	(for-each (lambda (key)
		    (set! tmp (conc tmp "/" (hash-table-ref/default key-params (vector-ref key 0) ""))))
		  (cdr keys)))
    tmp))
								
;; for use from the gui
(define (tasks:add-from-params mdb action keys key-params var-params)
  (let ((target    (keys:key-vals-hash->target keys key-params))
	(owner     (car (user-information (current-user-id))))
	(runname   (hash-table-ref/default var-params "runname" #f))
	(testpatts (hash-table-ref/default var-params "testpatts" "%"))
	(params    (hash-table-ref/default var-params "params"    "")))
    (tasks:add mdb action owner target runname testpatts params)))

;; return one task from those who are 'new' OR 'waiting' AND more than 10sec old
;;
(define (tasks:snag-a-task mdb)
  (let ((res    #f)
	(keytxt (conc (current-process-id) "-" (get-host-name) "-" (car (user-information (current-user-id))))))

    ;; first randomly set a new to pid-hostname-hostname
    (sqlite3:execute
     mdb 
     "UPDATE tasks_queue SET keylock=? WHERE id IN
        (SELECT id FROM tasks_queue 
           WHERE state='new' OR 
                 (state='waiting' AND (strftime('%s','now')-execution_time) > 10) OR
                 state='reset'
           ORDER BY RANDOM() LIMIT 1);" keytxt)

    (sqlite3:for-each-row
     (lambda (id . rem)
       (set! res (apply vector id rem)))
     mdb
     "SELECT id,action,owner,state,target,name,test,item,params,creation_time,execution_time FROM tasks_queue WHERE keylock=? ORDER BY execution_time ASC LIMIT 1;" keytxt)
    (if res ;; yep, have work to be done
	(begin
	  (sqlite3:execute mdb "UPDATE tasks_queue SET state='inprogress',execution_time=strftime('%s','now') WHERE id=?;"
			   (tasks:task-get-id res))
	  res)
	#f)))

(define (tasks:reset-stuck-tasks mdb)
  (let ((res '()))
    (sqlite3:for-each-row
     (lambda (id delta)
       (set! res (cons id res)))
     mdb
     "SELECT id,strftime('%s','now')-execution_time AS delta FROM tasks_queue WHERE state='inprogress' AND delta>700 ORDER BY delta DESC LIMIT 2;")
    (sqlite3:execute 
     mdb 
     (conc "UPDATE tasks_queue SET state='reset' WHERE id IN ('" (string-intersperse (map conc res) "','") "');"))))

;; return all tasks in the tasks_queue table
;;
(define (tasks:get-tasks mdb types states)
  (let ((res '()))
    (sqlite3:for-each-row
     (lambda (id . rem)
       (set! res (cons (apply vector id rem) res)))
     mdb
     (conc "SELECT id,action,owner,state,target,name,test,item,params,creation_time,execution_time 
               FROM tasks_queue "
               ;; WHERE  
               ;;   state IN " statesstr " AND 
	       ;;   action IN " actionsstr 
	   " ORDER BY creation_time DESC;"))
    res))

;; remove tasks given by a string of numbers comma separated
(define (tasks:remove-queue-entries mdb task-ids)
(define (tasks:remove-monitor-record mdb)
  (sqlite3:execute mdb (conc "DELETE FROM tasks_queue WHERE id IN (" task-ids ");")))

  (sqlite3:execute mdb "DELETE FROM monitors WHERE pid=? AND hostname=?;"
;; 
(define (tasks:start-monitor db mdb)
  (if (> (tasks:get-num-alive-monitors mdb) 2) ;; have two running, no need for more
      (debug:print-info 1 "Not starting monitor, already have more than two running")
      (let* ((megatestdb     (conc *toppath* "/megatest.db"))
	     (monitordbf     (conc (configf:lookup *configdat* "setup" "linktree") "/.db/monitor.db"))
	     (last-db-update 0)) ;; (file-modification-time megatestdb)))
	(task:register-monitor mdb)
	(let loop ((count      0)
		   (next-touch 0)) ;; next-touch is the time where we need to update last_update
	  ;; if the db has been modified we'd best look at the task queue
	  (let ((modtime (file-modification-time megatestdbpath )))
	    (if (> modtime last-db-update)
		(tasks:process-queue db mdb last-db-update megatestdb next-touch))
	    ;; WARNING: Possible race conditon here!!
	    ;; should this update be immediately after the task-get-action call above?
	    (if (> (current-seconds) next-touch)
		   (current-process-id)
		(begin
		  (tasks:monitors-update mdb)
		  (loop (+ count 1)(+ (current-seconds) 240)))
		(loop (+ count 1) next-touch)))))))
      
		   (get-host-name)))
(define (tasks:process-queue db mdb)
  (let* ((task   (tasks:snag-a-task mdb))
	 (action (if task (tasks:task-get-action task) #f)))
    (if action (print "tasks:process-queue task: " task))
    (if action
	(case (string->symbol action)
	  ((run)       (tasks:start-run   db mdb task))
	  ((remove)    (tasks:remove-runs db mdb task))
	  ((lock)      (tasks:lock-runs   db mdb task))
	  ;; ((monitor)   (tasks:start-monitor db task))
	  ((rollup)    (tasks:rollup-runs db mdb task))
	  ((updatemeta)(tasks:update-meta db mdb task))
	  ((kill)      (tasks:kill-monitors db mdb task))))))

(define (tasks:get-monitors mdb)
  (let ((res '()))
    (sqlite3:for-each-row
     (lambda (a . rem)
       (set! res (cons (apply vector a rem) res)))
     mdb
     "SELECT id,pid,strftime('%m/%d/%Y %H:%M',datetime(start_time,'unixepoch'),'localtime'),strftime('%m/%d/%Y %H:%M:%S',datetime(last_update,'unixepoch'),'localtime'),hostname,username FROM monitors ORDER BY last_update ASC;")
    (reverse res)
    ))

(define (tasks:tasks->text tasks)
  (let ((fmtstr "~10a~10a~10a~12a~20a~12a~12a~10a"))
    (conc (format #f fmtstr "id" "action" "owner" "state" "target" "runname" "testpatts" "params") "\n"
	  (string-intersperse 
	   (map (lambda (task)
		  (format #f fmtstr
			  (tasks:task-get-id     task)
			  (tasks:task-get-action task)
			  (tasks:task-get-owner  task)
			  (tasks:task-get-state  task)
			  (tasks:task-get-target task)
			  (tasks:task-get-name   task)
			  (tasks:task-get-test   task)
			  ;; (tasks:task-get-item   task)
			  (tasks:task-get-params task)))
		tasks) "\n"))))
   
(define (tasks:monitors->text-table monitors)
  (let ((fmtstr "~4a~8a~20a~20a~10a~10a"))
    (conc (format #f fmtstr "id" "pid" "start time" "last update" "hostname" "user") "\n"
	  (string-intersperse 
	   (map (lambda (monitor)
		  (format #f fmtstr
			  (tasks:monitor-get-id          monitor)

     (lambda (id pid host last-update delta)
       (print "Going to delete stale record for monitor with pid " pid " on host " host " last updated " delta " seconds ago")
       (set! deadlist (cons id deadlist)))
     mdb 
     "SELECT id,pid,hostname,last_update,strftime('%s','now')-last_update AS delta FROM monitors WHERE delta > 700;")
    (sqlite3:execute mdb (conc "DELETE FROM monitors WHERE id IN ('" (string-intersperse (map conc deadlist) "','") "');")))
  )
(define (tasks:register-monitor db mdb)
  (let* ((pid (current-process-id))
	 (hostname (get-host-name))
	 (userinfo (user-information (current-user-id)))
	 (username (car userinfo)))
    (print "Register monitor, pid: " pid ", hostname: " hostname ", username: " username)
    (sqlite3:execute mdb "INSERT INTO monitors (pid,start_time,last_update,hostname,username) VALUES (?,strftime('%s','now'),strftime('%s','now'),?,?);"
		     pid hostname username)))

(define (tasks:get-num-alive-monitors mdb)
  (let ((res 0))
    (sqlite3:for-each-row 
     (lambda (count)
       (set! res count))
     mdb
     "SELECT count(id) FROM monitors WHERE last_update < (strftime('%s','now') - 300) AND username=?;"
     (car (user-information (current-user-id))))
    res))

;; 
(define (tasks:remove-monitor-record mdb)
  (sqlite3:execute mdb "DELETE FROM monitors WHERE pid=? AND hostname=?;"
		   (current-process-id)
		   (get-host-name)))
(define (tasks:start-monitor db mdb)
  (if (> (tasks:get-num-alive-monitors mdb) 2) ;; have two running, no need for more
      (debug:print-info 1 "Not starting monitor, already have more than two running")
      (let* ((megatestdb     (conc *toppath* "/megatest.db"))
	     (monitordbf     (conc (configf:lookup *configdat* "setup" "linktree") "/.db/monitor.db"))
	     (last-db-update 0)) ;; (file-modification-time megatestdb)))
	(task:register-monitor mdb)
	(let loop ((count      0)
		   (next-touch 0)) ;; next-touch is the time where we need to update last_update
	  ;; if the db has been modified we'd best look at the task queue
	  (let ((modtime (file-modification-time megatestdbpath )))
	    (if (> modtime last-db-update)
		(tasks:process-queue db mdb last-db-update megatestdb next-touch))
	    ;; WARNING: Possible race conditon here!!
	    ;; should this update be immediately after the task-get-action call above?
	    (if (> (current-seconds) next-touch)
		(begin
		  (tasks:monitors-update mdb)
		  (loop (+ count 1)(+ (current-seconds) 240)))
		(loop (+ count 1) next-touch)))))))
      
;;======================================================================
;; T A S K S   Q U E U E
;;
;;   NOTE:: These operate on task_queue which is in main.db
;;
;;======================================================================

;; NOTE: It might be good to add one more layer of checking to ensure
;;       that no task gets run in parallel.



;; register a task
(define (tasks:add dbstruct action owner target runname testpatt params)
  (db:with-db 
   dbstruct #f #t
   (lambda (db)
     (sqlite3:execute db "INSERT INTO tasks_queue (action,owner,state,target,name,testpatt,params,creation_time,execution_time)
                             VALUES (?,?,'new',?,?,?,?,strftime('%s','now'),0);" 
		      action
		      owner
		      target
		      runname
		      testpatt
		      (if params params "")))))

(define (keys:key-vals-hash->target keys key-params)
  (let ((tmp (hash-table-ref/default key-params (vector-ref (car keys) 0) "")))
    (if (> (length keys) 1)
	(for-each (lambda (key)
		    (set! tmp (conc tmp "/" (hash-table-ref/default key-params (vector-ref key 0) ""))))
		  (cdr keys)))
    tmp))
								
;; for use from the gui, not ported
;;
;; (define (tasks:add-from-params mdb action keys key-params var-params)
;;   (let ((target    (keys:key-vals-hash->target keys key-params))
;; 	(owner     (car (user-information (current-user-id))))
;; 	(runname   (hash-table-ref/default var-params "runname" #f))
;; 	(testpatts (hash-table-ref/default var-params "testpatts" "%"))
;; 	(params    (hash-table-ref/default var-params "params"    "")))
;;     (tasks:add mdb action owner target runname testpatts params)))

;; return one task from those who are 'new' OR 'waiting' AND more than 10sec old
;;
(define (tasks:snag-a-task dbstruct)
  (let ((res    #f)
	(keytxt (conc (current-process-id) "-" (get-host-name) "-" (car (user-information (current-user-id))))))
    (db:with-db
     dbstruct #f #t
     (lambda (db)
       ;; first randomly set a new to pid-hostname-hostname
       (sqlite3:execute
	db 
	"UPDATE tasks_queue SET keylock=? WHERE id IN
           (SELECT id FROM tasks_queue 
              WHERE state='new' OR 
                    (state='waiting' AND (strftime('%s','now')-execution_time) > 10) OR
                    state='reset'
              ORDER BY RANDOM() LIMIT 1);" keytxt)

       (sqlite3:for-each-row
	(lambda (id . rem)
	  (set! res (apply vector id rem)))
	db
	"SELECT id,action,owner,state,target,name,test,item,params,creation_time,execution_time FROM tasks_queue WHERE keylock=? ORDER BY execution_time ASC LIMIT 1;" keytxt)
       (if res ;; yep, have work to be done
	   (begin
	     (sqlite3:execute db "UPDATE tasks_queue SET state='inprogress',execution_time=strftime('%s','now') WHERE id=?;"
			      (tasks:task-get-id res))
	     res)
	   #f)))))

(define (tasks:reset-stuck-tasks dbstruct)
  (let ((res '()))
    (db:with-db
     dbstruct #f #t
     (lambda (db)
       (sqlite3:for-each-row
	(lambda (id delta)
	  (set! res (cons id res)))
	db
	"SELECT id,strftime('%s','now')-execution_time AS delta FROM tasks_queue WHERE state='inprogress' AND delta>700 ORDER BY delta DESC LIMIT 2;")
       (sqlite3:execute 
	db 
	(conc "UPDATE tasks_queue SET state='reset' WHERE id IN ('" (string-intersperse (map conc res) "','") "');")
	)))))

;; return all tasks in the tasks_queue table
;;
(define (tasks:get-tasks dbstruct types states)
  (let ((res '()))
    (db:with-db
     dbstruct #f #f
     (lambda (db)
       (sqlite3:for-each-row
	(lambda (id . rem)
	  (set! res (cons (apply vector id rem) res)))
	db
	(conc "SELECT id,action,owner,state,target,name,test,item,params,creation_time,execution_time 
                  FROM tasks_queue "
	      ;; WHERE  
	      ;;   state IN " statesstr " AND 
	      ;;   action IN " actionsstr 
	      " ORDER BY creation_time DESC;"))
       res))))

;; remove tasks given by a string of numbers comma separated
(define (tasks:remove-queue-entries dbstruct task-ids)
  (db:with-db
   dbstruct #f #t
   (lambda (db)
     (sqlite3:execute db (conc "DELETE FROM tasks_queue WHERE id IN (" task-ids ");")))))

(define (tasks:process-queue dbstruct)
  (let* ((task   (tasks:snag-a-task dbstruct))
	 (action (if task (tasks:task-get-action task) #f)))
    (if action (print "tasks:process-queue task: " task))
    (if action
	(case (string->symbol action)
	  ((run)       (tasks:start-run     dbstruct task))
	  ((remove)    (tasks:remove-runs   dbstruct task))
	  ((lock)      (tasks:lock-runs     dbstruct task))
	  ;; ((monitor)   (tasks:start-monitor db task))
	  ((rollup)    (tasks:rollup-runs   dbstruct task))
	  ((updatemeta)(tasks:update-meta   dbstruct task))
	  ((kill)      (tasks:kill-monitors dbstruct task))))))

(define (tasks:tasks->text tasks)
  (let ((fmtstr "~10a~10a~10a~12a~20a~12a~12a~10a"))
    (conc (format #f fmtstr "id" "action" "owner" "state" "target" "runname" "testpatts" "params") "\n"
	  (string-intersperse 
	   (map (lambda (task)
		  (format #f fmtstr
			  (tasks:task-get-id     task)
			  (tasks:task-get-action task)
			  (tasks:task-get-owner  task)
			  (tasks:task-get-state  task)
			  (tasks:task-get-target task)
			  (tasks:task-get-name   task)
			  (tasks:task-get-test   task)
			  ;; (tasks:task-get-item   task)
			  (tasks:task-get-params task)))
		tasks) "\n"))))
   
(define (tasks:set-state mdb task-id state)
  (sqlite3:execute mdb "UPDATE tasks_queue SET state=? WHERE id=?;" 
		   state 
		   task-id))
(define (tasks:set-state dbstruct task-id state)
  (db:with-db 
   dbstruct #f #t
   (lambda (db)
     (sqlite3:execute db "UPDATE tasks_queue SET state=? WHERE id=?;" 
		      state 
		      task-id))))

;;======================================================================
;; Access using task key (stored in params; (hash-table->alist flags) hostname pid
;;======================================================================

(define (tasks:param-key->id mdb task-params)
  (handle-exceptions
   exn
   #f
   (sqlite3:first-result mdb "SELECT id FROM tasks_queue WHERE params LIKE ?;" task-params)))
(define (tasks:param-key->id dbstruct task-params)
  (db:with-db
   dbstruct #f #f
   (lambda (db)
     (handle-exceptions
      exn
      #f
      (sqlite3:first-result db "SELECT id FROM tasks_queue WHERE params LIKE ?;"
			    task-params)))))

(define (tasks:set-state-given-param-key mdb param-key new-state)
  (sqlite3:execute mdb "UPDATE tasks_queue SET state=? WHERE params LIKE ?;" new-state param-key))
(define (tasks:set-state-given-param-key dbstruct param-key new-state)
  (db:with-db
   dbstruct #f #t
   (lambda (db)
     (sqlite3:execute db "UPDATE tasks_queue SET state=? WHERE params LIKE ?;" new-state param-key))))

(define (tasks:get-records-given-param-key mdb param-key state-patt action-patt test-patt)
  (handle-exceptions
   exn
   '()
   (sqlite3:first-row mdb "SELECT id,action,owner,state,target,name,testpatt,keylock,params WHERE
         params LIKE ? AND state LIKE ? AND action LIKE ? AND testpatt LIKE ?;"
		      param-key state-patt action-patt test-patt)))
(define (tasks:get-records-given-param-key dbstruct param-key state-patt action-patt test-patt)
  (db:with-db
   dbstruct #f #f
   (lambda (db)
     (handle-exceptions
      exn
      '()
      (sqlite3:first-row db "SELECT id,action,owner,state,target,name,testpatt,keylock,params WHERE
                               params LIKE ? AND state LIKE ? AND action LIKE ? AND testpatt LIKE ?;"
			 param-key state-patt action-patt test-patt)))))


;;======================================================================
;; Rogue items, no place to put these yet
;;======================================================================

(define (tasks:find-task-queue-records mdb target run-name test-patt state-patt action-patt)
(define (tasks:find-task-queue-records dbstruct target run-name test-patt state-patt action-patt)
  ;; (handle-exceptions
  ;;  exn
  ;;  '()
  ;;  (sqlite3:first-row
  (let ((db (db:delay-if-busy (db:get-db dbstruct #f)))
  (let ((res '()))
	(res '()))
    (sqlite3:for-each-row 
     (lambda (a . b)
       (set! res (cons (cons a b) res)))
     mdb "SELECT id,action,owner,state,target,name,testpatt,keylock,params FROM tasks_queue 
       WHERE
         target = ? AND name = ? AND state LIKE ? AND action LIKE ? AND testpatt LIKE ?;"
     db "SELECT id,action,owner,state,target,name,testpatt,keylock,params FROM tasks_queue 
           WHERE
              target = ? AND name = ? AND state LIKE ? AND action LIKE ? AND testpatt LIKE ?;"
     target run-name state-patt action-patt test-patt)
    res)) ;; )


(define (tasks:kill-runner mdb target run-name)
  (let ((records    (tasks:find-task-queue-records mdb target run-name "%" "running" "run-tests"))
;; kill any runner processes (i.e. processes handling -runtests) that match target/runname
;; 
;; do a remote call to get the task queue info but do the killing as self here.
;;
(define (tasks:kill-runner target run-name)
  (let ((records    (rmt:tasks-find-task-queue-records target run-name "%" "running" "run-tests"))
	(hostpid-rx (regexp "\\s+(\\w+)\\s+(\\d+)$"))) ;; host pid is at end of param string
    (if (null? records)
	(debug:print 0 "No run launching processes found for " target " / " run-name)
	(debug:print 0 "Found " (length records) " run(s) to kill."))
    (for-each 
     (lambda (record)
       (let* ((param-key (list-ref record 8))

		   (let ((old-targethost (getenv "TARGETHOST")))
		     (setenv "TARGETHOST" hostname)
		     (setenv "TARGETHOST_LOGF" "server-kills.log")
		     (system (conc "nbfake kill " pid))
		     (if old-targethost (setenv "TARGETHOST" old-targethost))
		     (unsetenv "TARGETHOST")
		     (unsetenv "TARGETHOST_LOGF"))))
	     (debug:print 0 "ERROR: no record or improper record for " target "/" run-name " in tasks_queue in monitor.db"))))
	     (debug:print 0 "ERROR: no record or improper record for " target "/" run-name " in tasks_queue in main.db"))))
     records)))


;;======================================================================
;; The routines to process tasks
;;======================================================================

;; NOTE: It might be good to add one more layer of checking to ensure
;;       that no task gets run in parallel.

(define (tasks:start-run db mdb task)
  (let ((flags (make-hash-table)))
    (hash-table-set! flags "-rerun" "NOT_STARTED")
    (if (not (string=? (tasks:task-get-params task) ""))
	(hash-table-set! flags "-setvars" (tasks:task-get-params task)))
    (print "Starting run " task)
    ;; sillyness, just call the damn routine with the task vector and be done with it. FIXME SOMEDAY
    (runs:run-tests db
		    (tasks:task-get-target task)
		    (tasks:task-get-name   task)
		    (tasks:task-get-test   task)
		    (tasks:task-get-item   task)
		    (tasks:task-get-owner  task)
		    flags)
    (tasks:set-state mdb (tasks:task-get-id task) "waiting")))

(define (tasks:rollup-runs db mdb task)
  (let* ((flags (make-hash-table)) 
	 (keys  (db:get-keys db))
	 (keyvals (keys:target-keyval keys (tasks:task-get-target task))))
    ;; (hash-table-set! flags "-rerun" "NOT_STARTED")
    (print "Starting rollup " task)
    ;; sillyness, just call the damn routine with the task vector and be done with it. FIXME SOMEDAY
    (runs:rollup-run db
		     keys 
		     keyvals
		     (tasks:task-get-name  task)
		     (tasks:task-get-owner  task))
    (tasks:set-state mdb (tasks:task-get-id task) "waiting")))
;; (define (tasks:start-run dbstruct mdb task)
;;   (let ((flags (make-hash-table)))
;;     (hash-table-set! flags "-rerun" "NOT_STARTED")
;;     (if (not (string=? (tasks:task-get-params task) ""))
;; 	(hash-table-set! flags "-setvars" (tasks:task-get-params task)))
;;     (print "Starting run " task)
;;     ;; sillyness, just call the damn routine with the task vector and be done with it. FIXME SOMEDAY
;;     (runs:run-tests db
;; 		    (tasks:task-get-target task)
;; 		    (tasks:task-get-name   task)
;; 		    (tasks:task-get-test   task)
;; 		    (tasks:task-get-item   task)
;; 		    (tasks:task-get-owner  task)
;; 		    flags)
;;     (tasks:set-state mdb (tasks:task-get-id task) "waiting")))
;; 
;; (define (tasks:rollup-runs db mdb task)
;;   (let* ((flags (make-hash-table)) 
;; 	 (keys  (db:get-keys db))
;; 	 (keyvals (keys:target-keyval keys (tasks:task-get-target task))))
;;     ;; (hash-table-set! flags "-rerun" "NOT_STARTED")
;;     (print "Starting rollup " task)
;;     ;; sillyness, just call the damn routine with the task vector and be done with it. FIXME SOMEDAY
;;     (runs:rollup-run db
;; 		     keys 
;; 		     keyvals
;; 		     (tasks:task-get-name  task)
;; 		     (tasks:task-get-owner  task))
;;     (tasks:set-state mdb (tasks:task-get-id task) "waiting")))

(use nanomsg srfi-18 sqlite3 numbers)

(define resp (nn-socket 'rep))

(use zmq posix numbers)

(define cname "Bob")
(define runtime 10)
(let ((args (argv)))
  (if (< (length args) 3)
      (begin
	(print "Usage: mockupclient clientname runtime")
	(exit))
      (begin
	(set! cname (cadr args))
	(set! runtime (string->number (caddr args))))))
      
;; (define start-delay (/ (random 100) 9))
;; (define runtime     (+ 1 (/ (random 200) 2)))

(print "Starting client " cname " with runtime " runtime)

(include "mockupclientlib.scm")

(set! endtime (+ (current-seconds) runtime))

;; first ping the server to ensure we have a connection
(if (server-ping cname 5)
    (print "SUCCESS: Client " cname " connected to server")
    (begin
      (print "ERROR: Client " cname " failed ping of server, exiting")
      (exit)))

(let loop ()
  (let ((x (random 15))
	(varname (list-ref (list "hello" "goodbye" "saluton" "kiaorana")(random 4))))
    (case x
      ;; ((1)(dbaccess cname 'sync "nodat"    #f))
      ((2 3 4 5)(dbaccess cname 'set varname (random 999)))
      ((6 7 8 9 10)(print cname ": Get \"" varname "\" " (dbaccess cname 'get varname #f)))
      (else
       (thread-sleep! 0.011)))
    (if (< (current-seconds) endtime)
	(loop))))

(print "Client " cname " all done!!")

(define reqs (nn-socket 'req))

(connect-socket reqs "tcp://localhost:6563")

(thread-sleep! 0.2)

(define (server-ping cname timeout)
  (let ((msg     (conc cname ":ping:" timeout))
	(maxtime (+ (current-seconds) timeout)))
    (print "pinging server from " cname " with timeout " timeout)
    (let loop ((res   #f))
      (if (< maxtime (current-seconds))
	  #f ;; failed to ping
	  (if (equal? res "Got ping")
	      #t
	      (begin
		(print "Ping received from server " res)
		(send-message push msg)
		(thread-sleep! 0.1)
		(loop (receive-message sub non-blocking: #t))))))))
  
(define (dbaccess cname cmd var val #!key (numtries 20))
  (let* ((msg (conc cname ":" cmd ":" (if val (conc var " " val) var)))
	 (res #f)
	 (mtx1 (make-mutex))
	 (do-access (lambda ()
		      (let ((tmpres #f))
			(print "Sending msg: " msg)
			(send-message push msg)
			(print "Message " msg " sent")
			(print "Client " cname " waiting for response to " msg)
			(print "Client " cname " received address " (receive-message* sub))
			(set! tmpres (receive-message* sub))
			(mutex-lock! mtx1)
			(set! res tmpres)
			(mutex-unlock! mtx1))))
	 (th1 (make-thread do-access "do access"))
	 (th2 (make-thread (lambda ()
			     (let ((result #f))
			       (mutex-lock! mtx1)
			       (set! result res)
			       (mutex-unlock! mtx1)
			       (thread-sleep! 5)
			       (if (not result)
				   (if (> numtries 0)
				       (begin
					 (print "WARNING: access timed out for " cname ", trying again. Trys remaining=" numtries)
					 (dbaccess cname cmd var val numtries: (- numtries 1)))
				       (begin
					 (print "ERROR: dbaccess timed out. Exiting")
					 (exit)))))
			     "timeout thread"))))
    (thread-start! th1)
    (thread-start! th2)
    (thread-join! th1)
    (if res (print "SUCCESS: received " res " with " numtries " remaining possible attempts"))
    res))

;; pub/sub with envelope address
;; Note that if you don't insert a sleep, the server will crash with SIGPIPE as soon
;; as a client disconnects.  Also a remaining client may receive tons of
;; messages afterward.

(use nanomsg srfi-18 sqlite3 numbers)

(define resp (nn-socket 'rep))
(define cname "server")
(define total-db-accesses 0)
(define start-time (current-seconds))

(nn-bind resp  "tcp://*:6563")

(thread-sleep! 0.2)

(define (open-db)
  (let* ((dbpath    "mockup.db")
	 (dbexists  (file-exists? dbpath))
	 (db        (open-database dbpath)) ;; (never-give-up-open-db dbpath))
	 (handler   (make-busy-timeout 10)))
    (set-busy-handler! db handler)
    (if (not dbexists)
	(for-each
	 (lambda (stmt)
	   (execute db stmt))
	 (list
	  "PRAGMA SYNCHRONOUS=0;"
	  "CREATE TABLE clients (id INTEGER PRIMARY KEY,name TEXT,num_accesses INTEGER DEFAULT 0);"
	  "CREATE TABLE vars    (var TEXT,val TEXT,CONSTRAINT vars_constraint UNIQUE (var));")))
    db))

(define cid-cache (make-hash-table))

(define (get-client-id db cname)
  (let ((cid (hash-table-ref/default cid-cache cname #f)))
    (if cid 
	cid
	(begin
	  (execute db "INSERT OR REPLACE INTO clients (name) VALUES(?);" cname)
	  (for-each-row 
	   (lambda (id)
	     (set! cid id))
	   db
	   "SELECT id FROM clients WHERE name=?;" cname)
	  (hash-table-set! cid-cache cname cid)
	  (set! total-db-accesses (+ total-db-accesses 2))
	  cid))))

(define (count-client db cname)
  (let ((cid (get-client-id db cname)))
    (execute db "UPDATE clients SET num_accesses=num_accesses+1 WHERE id=?;" cid)
    (set! total-db-accesses (+ total-db-accesses 1))
    ))

(define db (open-db))
;; (define queuelst '())
;; (define mx1 (make-mutex))

(define max-queue-len 0)

(define (process-queue queuelst)
  (let ((queuelen (length queuelst)))
    (if (> queuelen max-queue-len)
	(set! max-queue-len queuelen))
    (for-each
     (lambda (item)
       (let ((cname (vector-ref item 1))
	     (clcmd (vector-ref item 2))
	     (cdata (vector-ref item 3)))
	 (send-message pub cname send-more: #t)
	 (send-message pub (case clcmd
			     ((sync)
			      (conc queuelen))
			     ((set)
			      (set! total-db-accesses (+ total-db-accesses 1))
			      (apply execute db "INSERT OR REPLACE INTO vars (var,val) VALUES (?,?);" (string-split cdata))
			      "ok")
			     ((get)
			      (set! total-db-accesses (+ total-db-accesses 1))
			      (let ((res "noval"))
				(for-each-row
				 (lambda (val)
				   (set! res val))
				 db 
				 "SELECT val FROM vars WHERE var=?;" cdata)
				res))
			     (else (conc "unk cmd: " clcmd))))))
     queuelst)))

;; SERVER THREAD
(define th1 (make-thread 
	     (lambda ()
	       (let ((last-run 0)) ;; current-seconds when run last
		 (let loop ((queuelst '()))
		   (let* ((indat (receive-message* pull))
			  (parts (string-split indat ":"))
			  (cname (car parts))                   ;; client name
			  (clcmd (string->symbol (cadr parts))) ;; client cmd
			  (cdata (caddr parts))                 ;; client data
			  (svect (vector (current-seconds) cname clcmd cdata))) ;; record for the queue
		     ;; (print "Server received message: " indat)
		     (count-client db cname)
		     (case clcmd
		       ((ping)
			(print "Got ping from " cname)
			(send-message pub cname send-more: #t)
			(send-message pub "Got ping")
			(loop queuelst))
		       ((sync) ;; just process the queue
			(print "Got sync from " cname)
			(process-queue (cons svect queuelst))
			(loop '()))
		       ((get)
			(process-queue (cons svect queuelst))
			(loop '()))
		       (else
			(loop (cons svect queuelst))))))))
	     "server thread"))

(include "mockupclientlib.scm")

;; SYNC THREAD
;; send a sync to the pull port
(define th2 (make-thread
	     (lambda ()
	       (let ((last-action-time (current-seconds)))
		 (let loop ()
		   (thread-sleep! 5)
		   (let ((queuelen (string->number (dbaccess "server" 'sync "nada" #f)))
			 (last-action-delta #f))
		     (if (> queuelen 1)(set! last-action-time (current-seconds)))
		     (set! last-action-delta (- (current-seconds) last-action-time))
		     (print "Server: Got queuelen=" queuelen ", last-action-delta=" last-action-delta)
		     (if (< last-action-delta 60)
			 (loop)
			 (print "Server exiting, 25 seconds since last access"))))))
	     "sync thread"))

(thread-start! th1)
(thread-start! th2)
(thread-join! th2)

(let* ((run-time       (- (current-seconds) start-time))
       (queries/second (/  total-db-accesses run-time)))
  (print "Server exited! Total db accesses=" total-db-accesses " in " run-time " seconds for " queries/second " queries/second with max queue length of: " max-queue-len))

;; watch nanomsg's pipeline load-balancer in action.
(use nanomsg)

(define push (nn-socket 'push))
(define pull1 (nn-socket 'pull))
(define pull2 (nn-socket 'pull))

(nn-bind    push  "inproc://test")
(nn-connect pull1 "inproc://test")
(nn-connect pull2 "inproc://test")

(nn-send push "a")
(nn-send push "b")
(nn-send push "c")
(nn-send push "d")

(define ((th sock))
  (print (current-thread) ": " (nn-recv sock))
  (print (current-thread) ": " (nn-recv sock))
  (print (current-thread) " is done"))

(thread-start! (th pull1))
(thread-start! (th pull2))

(thread-sleep! 1)

;; watch nanomsg's pipeline load-balancer in action.
(use nanomsg)

(define req   (nn-socket 'req))

(nn-connect req  "tcp://localhost:22022")

;; (with-output-to-string (lambda ()(serialize obj)))
(define (client-send-receive soc msg)
  (nn-send soc msg)
  (nn-recv soc))

(define ((talk-to-server soc))
  (let loop ((cnt 20))
    (let ((name (list-ref '("Matt" "Tom" "Bob" "Jill" "James" "Jane")(random 6))))
      (print "Sending " name)
      (print (client-send-receive req name))
      (if (> cnt 0)(loop (- cnt 1)))))
  (print (client-send-receive req "quit"))
  (nn-close req)
  (exit))

;; (thread-start! (lambda ()
;; 		 (thread-sleep! 20)
;; 		 (print "Give up on waiting for the server")
;; 		 (nn-close req)
;; 		 (exit)))

(thread-join! (thread-start! (talk-to-server req)))

;; watch nanomsg's pipeline load-balancer in action.
(use nanomsg)

;; (use trace)
;; (trace nn-bind nn-socket nn-assert nn-recv nn-send thread-terminate! nn-close )

(define port  22022)
(define host  "127.0.0.1")

(define rep   (nn-socket 'rep))

(print "connecting, got: " (nn-bind    rep  (conc "tcp://" "*" ":" port)))

(define (server soc)
  (print "server starting")
  (let loop ((msg-in (nn-recv soc)))
    (print "server received: " msg-in)
    (cond
     ((equal? msg-in "quit")
      (nn-send soc "Ok, quitting"))
     ((and (>= (string-length msg-in) 4)
	   (equal? (substring msg-in 0 4) "ping"))
      (nn-send soc (conc (current-process-id)))
      (loop (nn-recv soc)))
     ;;((and (>= (string-length msg-in)
     (else
      (let ((this-task (random 15)))
	(thread-sleep! this-task)
	(nn-send soc (conc "hello " msg-in " this task took " this-task " seconds to complete"))
	(loop (nn-recv soc)))))))

(define (ping-self host port #!key (return-socket #t))
  ;; send a random number along with pid and check that we get it back
  (let* ((req     (nn-socket 'req))
	 (key     "ping")
	 (success #f)
	 (keepwaiting #t)
	 (ping    (make-thread
		   (lambda ()
		     (print "ping: sending string \"" key "\", expecting " (current-process-id))
		     (nn-send req key)
		     (let ((result  (nn-recv req)))
		       (if (equal? (conc (current-process-id)) result)
			   (begin
			     (print "ping, success: received \"" result "\"")
			     (set! success #t))
			   (begin
			     (print "ping, failed: received key \"" result "\"")
			     (set! keepwaiting #f)
			     (set! success #f)))))
		   "ping"))
	 (timeout (make-thread (lambda ()
				 (let loop ((count 0))
				   (thread-sleep! 1)
				   (print "still waiting after count seconds...")
				   (if (and keepwaiting (< count 10))
				       (loop (+ count 1))))
				 (if keepwaiting
				     (begin
				       (print "timeout waiting for ping")
				       (thread-terminate! ping))))
			       "timeout")))
    (nn-connect req (conc "tcp://" host ":" port))
    (handle-exceptions
     exn
     (begin
       (print-call-chain)
       (print 0 " message: " ((condition-property-accessor 'exn 'message) exn))
       (print "exn=" (condition->list exn))
       (print "ping failed to connect to " host ":" port))
     (thread-start! timeout)
     (thread-start! ping)
     (thread-join! ping)
     (if success (thread-terminate! timeout)))
    (if return-socket
	(if success req #f)
	(begin
	  (nn-close req)
	  success))))

(let ((server-thread (make-thread (lambda ()(server rep)) "server")))
  (thread-start! server-thread)
  ;; (thread-sleep! 1)
  (if (ping-self host port)
      (begin
	(thread-join! server-thread)
	(nn-close rep))
      (print "ping failed")))

(exit)

;; watch nanomsg's pipeline load-balancer in action.
(use nanomsg)

(define req   (nn-socket 'req))
(define rep   (nn-socket 'rep))

(nn-bind    rep  "inproc://test")
(nn-connect req  "inproc://test")

(define (client-send-receive soc msg)
  (nn-send soc msg)
  (nn-recv soc))

(define ((server soc))
  (let loop ((msg-in (nn-recv soc)))
    (if (not (equal? msg-in "quit"))
	(begin
	  (nn-send soc (conc "hello " msg-in))
	  (loop (nn-recv soc))))))

(thread-start! (server rep))

(print (client-send-receive req "Matt"))
(print (client-send-receive req "Tom"))

;; (client-send-receive req "quit")

(nn-close req)
(nn-close rep)
(exit)

;;;; client.scm
(use rpc posix)

(define call (rpc:procedure 'foo "localhost"))

(do ((i 10 (sub1 i)))
    ((zero? i))
  (print "-> " (call (random 100))))

;;;; server.scm
(use rpc)

(rpc:publish-procedure!
 'foo
 (lambda (x)
   (print "foo: " x)
   #f))

(rpc:publish-procedure!
 'fini
 (lambda () (print "fini") (thread-start! (lambda () (thread-sleep! 3) (print "terminate") (exit))) #f))

((rpc:make-server (tcp-listen (rpc:default-server-port))) #t)

stopserver :
	cd ..;make -j && make install
	cd fullrun;$(MEGATEST) -stop-server 0

repl :
	cd ..;make -j && make install
	cd fullrun;$(MEGATEST) -repl
	cd fullrun;$(MEGATEST) -:b -repl

test0 : cleanprep
	cd simplerun ; $(MEGATEST) -server - -debug $(DEBUG)

test1 : cleanprep

test2 : fullprep

# Some simple checks for bootstrapping and run loop logic 

test9 : minsetup test9a test9b test9c test9d test9e

test9a :
	@echo Run super-simple mintest e, no waitons.
	cd mintest;$(DASHBOARD)&
	cd mintest;$(MEGATEST) -preclean -runtests e -target $(VER) :runname `date +%H.%M.%S` -debug $(DEBUG)
	cd mintest;$(MEGATEST) -preclean -runtests e -target $(VER) -runname $(shell date +%H.%M.%S) -debug $(DEBUG)

test9b :
	@echo Run simple mintest d with one waiton c
	cd mintest;$(MEGATEST) -preclean -runtests d -target $(VER) :runname `date +%H.%M.%S` -debug $(DEBUG)
	cd mintest;$(MEGATEST) -preclean -runtests d -target $(VER) -runname `date +%H.%M.%S` -debug $(DEBUG)

test9c :
	@echo Run mintest a with full waiton chain a -> b -> c -> d -> e
	cd mintest;$(MEGATEST) -preclean -runtests a -target $(VER) :runname `date +%H.%M.%S` -debug $(DEBUG)
	cd mintest;$(MEGATEST) -preclean -runtests a -target $(VER) -runname `date +%H.%M.%S` -debug $(DEBUG)

test9d :
	@echo Run an itemized test with no items
	cd mintest;$(MEGATEST) -preclean -runtests g -target $(VER) :runname `date +%H.%M.%S` -debug $(DEBUG)
	cd mintest;$(MEGATEST) -preclean -runtests g -target $(VER) -runname `date +%H.%M.%S` -debug $(DEBUG)

test9e :
	@echo Run mintest a1 with full waiton chain with d1fail: a1 -> b1 -> c1 -> d1fail -> e1
	cd mintest;$(MEGATEST) -preclean -runtests a1 -target $(VER) :runname `date +%H.%M.%S` -debug $(DEBUG)
	cd mintest;$(MEGATEST) -preclean -runtests a1 -target $(VER) -runname `date +%H.%M.%S` -debug $(DEBUG)

test10 :
	@echo Run a bunch of different targets simultaneously
	(cd fullrun;$(MEGATEST) -server - ;sleep 2)&
	for targ in mint/btrfs/mintdir sunos/sshfs/loc; do \
	   (cd fullrun;$(MEGATEST) -preclean -runtests priority_10_waiton_1 -target $$targ :runname $(RUNNAME) &); done
	for sys in ubuntu suse redhat debian;do \