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To Artifact [953d0f1da2]:


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(declare (uses http-transportmod))
(declare (uses servermod))
(declare (uses clientmod))

(module rmtmod
	*
	
(import scheme 
	chicken.random
	chicken.string
	chicken.base
	chicken.condition
	chicken.sort
	chicken.time
	chicken.base
	chicken.file
	chicken.format
	chicken.process
	chicken.file.posix
	chicken.process-context.posix
	chicken.process-context




	chicken.io

	







	(prefix sqlite3 sqlite3:)
	typed-records




	srfi-1
	srfi-13
	srfi-18
	srfi-69



	commonmod


	apimod
	itemsmod
	http-client



	debugprint


	mtver
	regex
	tasksmod
	pgdb


	(prefix mtargs args:)
	dbmod
	http-transportmod
	servermod
	clientmod
	configfmod
       
	)

(defstruct alldat
  (areapath #f)
  (ulexdat  #f)
  )








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(declare (uses http-transportmod))
(declare (uses servermod))
(declare (uses clientmod))

(module rmtmod
	*
	
(import scheme
		
	chicken.base
	chicken.condition
	chicken.file
	chicken.file.posix
	chicken.format
	chicken.io
	chicken.pathname
	chicken.port
	chicken.pretty-print
	chicken.process
	chicken.process-context
	chicken.process-context.posix
	chicken.sort
	chicken.string
	chicken.tcp	chicken.random
	chicken.time
	chicken.time.posix
	(prefix sqlite3 sqlite3:)
	
	directory-utils
	http-client
	intarweb
	matchable
	md5
	message-digest
	(prefix base64 base64:)
	(prefix sqlite3 sqlite3:)
	regex
	s11n
	spiffy
	spiffy-directory-listing
	spiffy-request-vars
	srfi-1
	srfi-13
	srfi-18
	srfi-69
	stack
	system-information
	typed-records
	uri-common
	z3
       
	apimod

	clientmod
	commonmod
	configfmod
	dbmod
	debugprint
	http-transportmod
	itemsmod
	mtver


	pgdb
	pkts
	portloggermod
	(prefix mtargs args:)


	servermod
	stml2
	tasksmod

	)

(defstruct alldat
  (areapath #f)
  (ulexdat  #f)
  )

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;; -> http://abc.com:900/<entrypoint>
;;
(define (rmt:conn->uri conn entrypoint)
  (conc "http://"(rmt:conn-ipaddr conn)":"(rmt:conn-port conn)"/"entrypoint))

;; set up the api proc, seems like there should be a better place for this?

(api-proc api:process-request)

;; do we have a connection to apath dbname and
;; is it not expired? then return it
;;
;; else setup a connection
;;







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;; -> http://abc.com:900/<entrypoint>
;;
(define (rmt:conn->uri conn entrypoint)
  (conc "http://"(rmt:conn-ipaddr conn)":"(rmt:conn-port conn)"/"entrypoint))

;; set up the api proc, seems like there should be a better place for this?
(define api-proc (make-parameter conc))
(api-proc api:process-request)

;; do we have a connection to apath dbname and
;; is it not expired? then return it
;;
;; else setup a connection
;;
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;;
(define (server:ping host port server-id #!key (do-exit #f))
  (let* ((sdat       (servdat-init #f host port server-id)))
    (rmt:send-receive sdat 'ping '())))

;; ping the given server
;;
(define (server:check-server server-record)
  (let* ((server-url (server:record->url server-record))
         (server-id (server:record->id server-record)) 
         (res       (server:ping server-url server-id)))
    (if res
        server-url
	#f)))








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;;
(define (server:ping host port server-id #!key (do-exit #f))
  (let* ((sdat       (servdat-init #f host port server-id)))
    (rmt:send-receive sdat 'ping '())))

;; ping the given server
;;
#;(define (server:check-server server-record)
  (let* ((server-url (server:record->url server-record))
         (server-id (server:record->id server-record)) 
         (res       (server:ping server-url server-id)))
    (if res
        server-url
	#f)))

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			  )))
		  (begin    ;; no server registered
		    ;; (server:kind-run areapath)
		    (server:start-and-wait areapath)
		    (debug:print-info 0 *default-log-port* "client:setup, no server registered, remaining-tries=" remaining-tries)
		    (thread-sleep! 1) ;; (+ 5 (pseudo-random-integer (- 20 remaining-tries))))  ;; give server a little time to start up, randomize a little to avoid start storms.
		    (client:setup-http areapath remaining-tries: (- remaining-tries 1)))))))))










































































































































































































































































































































































































































































































































































































































































































































































































































































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			  )))
		  (begin    ;; no server registered
		    ;; (server:kind-run areapath)
		    (server:start-and-wait areapath)
		    (debug:print-info 0 *default-log-port* "client:setup, no server registered, remaining-tries=" remaining-tries)
		    (thread-sleep! 1) ;; (+ 5 (pseudo-random-integer (- 20 remaining-tries))))  ;; give server a little time to start up, randomize a little to avoid start storms.
		    (client:setup-http areapath remaining-tries: (- remaining-tries 1)))))))))


;;======================================================================
;; http-transportmod.scm contents moved here
;;======================================================================

;; (require-extension (srfi 18) extras tcp s11n)
;; 
;; 
;; (use  srfi-1 posix regex regex-case srfi-69 hostinfo md5 message-digest posix-extras)
;; 
;; (use spiffy uri-common intarweb http-client spiffy-request-vars intarweb spiffy-directory-listing)
;; 
;; Configurations for server
(tcp-buffer-size 2048)
(max-connections 2048) 

(defstruct servdat
  (host #f)
  (port #f)
  (uuid #f)
  (dbfile #f)
  (api-url #f)
  (api-uri #f)
  (api-req #f))

(define (servdat->url sdat)
  (conc (servdat-host sdat)":"(servdat-port sdat)))

(define (http-transport:make-server-url hostport)
  (if (not hostport)
      #f
      (conc "http://" (car hostport) ":" (cadr hostport))))

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

;; NOTE: http-transport:launch is the entry point
;;          -> http-transport:run
;;             -> http-transport:try-start-server -> http-transport:try-start-server (until success)

(define (http-get-function fnkey)
  (hash-table-ref/default *http-functions* fnkey (lambda () "nothing here yet")))

(define (http-handle-api dbstruct $)
  (if (api-proc)
      ((api-proc) dbstruct $) ;; ($) => alist
      'no-api-proc-set))

(define (http-transport:run hostn)
  ;; Configurations for server
  (tcp-buffer-size 2048)
  (max-connections 2048) 
  (debug:print 2 *default-log-port* "Attempting to start the server ...")
  (let* ((db              #f) ;;        (open-db)) ;; we don't want the server to be opening and closing the db unnecesarily
	 (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      (portlogger:open-run-close portlogger:find-port))
	 (link-tree-path  (common:get-linktree))
	 (tmp-area        (common:get-db-tmp-area))
	 #;(start-file      (conc tmp-area "/.server-start")))
    (debug:print-info 0 *default-log-port* "portlogger recommended port: " start-port)
    ;; set some parameters for the server
    (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")))))

    ;; 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"))
				   (debug:print 0 *default-log-port* "In api request $=" $)
				   (send-response ;; the $ is the request vars proc
				    body: (http-handle-api *dbstruct-db* $)
				    headers: '((content-type text/plain)))
				   (set! *db-last-access* (current-seconds)))
				  ((equal? (uri-path (request-uri (current-request))) 
					   '(/ "ping"))
				   (send-response body: (conc *toppath*"/"(args:get-arg "-db"))
						  headers: '((content-type text/plain))))
				  ((equal? (uri-path (request-uri (current-request))) 
					   '(/ "loop-test"))
				   (send-response body: (alist-ref 'data ($))
						  headers: '((content-type text/plain))))
				  ((equal? (uri-path (request-uri (current-request))) 
					   '(/ ""))
				   (send-response body: ((http-get-function 'http-transport:main-page))))
				  ((equal? (uri-path (request-uri (current-request))) 
					   '(/ "json_api"))
				   (send-response body: ((http-get-function 'http-transport:main-page))))
				  ((equal? (uri-path (request-uri (current-request))) 
					   '(/ "runs"))
				   (send-response body: ((http-get-function 'http-transport:main-page))))
				  ((equal? (uri-path (request-uri (current-request))) 
					   '(/ any))
				   (send-response body: "hey there!\n"
						  headers: '((content-type text/plain))))
				  ((equal? (uri-path (request-uri (current-request))) 
					   '(/ "hey"))
				   (send-response body: "hey there!\n" 
						  headers: '((content-type text/plain))))
                                  ((equal? (uri-path (request-uri (current-request))) 
					   '(/ "jquery3.1.0.js"))
				   (send-response body: ((http-get-function 'http-transport:show-jquery))
						  headers: '((content-type application/javascript))))
                                  ((equal? (uri-path (request-uri (current-request))) 
					   '(/ "test_log"))
				   (send-response body: ((http-get-function 'http-transport:html-test-log) $) 
						  headers: '((content-type text/HTML))))    
                                  ((equal? (uri-path (request-uri (current-request))) 
					   '(/ "dashboard"))
				   (send-response body: ((http-get-function 'http-transport:html-dboard) $)
						  headers: '((content-type text/HTML)))) 
				  (else (continue))))))))
    #;(handle-exceptions
	exn
      (debug:print 0 *default-log-port* "Failed to create file " start-file ", exn=" exn)
      (with-output-to-file start-file (lambda ()(print (current-process-id)))))
    (http-transport:try-start-server ipaddrstr start-port)))

;; This is recursively run by http-transport:run until sucessful
;;
(define (http-transport:try-start-server ipaddrstr portnum)
  (let ((config-hostname (configf:lookup *configdat* "server" "hostname"))
	(config-use-proxy (equal? (configf:lookup *configdat* "client" "use-http_proxy") "yes")))
    (if (not config-use-proxy)
	(determine-proxy (constantly #f)))
    (debug:print-info 0 *default-log-port* "http-transport:try-start-server time=" (seconds->time-string (current-seconds)) " ipaddrsstr=" ipaddrstr " portnum=" portnum " config-hostname=" config-hostname)
    (handle-exceptions
	exn
	(begin
	  (print-error-message exn)
	  (if (< portnum 64000)
	      (begin 
		(debug:print 0 *default-log-port* "WARNING: attempt to start server failed. Trying again ...")
		(debug:print 0 *default-log-port* " message: " ((condition-property-accessor 'exn 'message) exn))
		(debug:print 5 *default-log-port* "exn=" (condition->list exn))
		(portlogger:open-run-close portlogger:set-failed portnum)
		(debug:print 0 *default-log-port* "WARNING: failed to start on portnum: " portnum ", trying next port")
		(thread-sleep! 0.1)
		
		;; get_next_port goes here
		(http-transport:try-start-server ipaddrstr
						 (portlogger:open-run-close portlogger:find-port)))
	      (begin
		(print "ERROR: Tried and tried but could not start the server"))))
      ;; any error in following steps will result in a retry
      (set! *server-info* (make-servdat host: ipaddrstr port: portnum))
      (debug:print 0 *default-log-port* "INFO: Trying to start server on " ipaddrstr ":" portnum)
      ;; This starts the spiffy server
      ;; NEED WAY TO SET IP TO #f TO BIND ALL
      ;; (start-server bind-address: ipaddrstr port: portnum)
      (if config-hostname ;; this is a hint to bind directly
	  (start-server port: portnum bind-address: (if (equal? config-hostname "-")
							ipaddrstr
							config-hostname))
	  (start-server port: portnum))
      (portlogger:open-run-close portlogger:set-port portnum "released")
      (debug:print 1 *default-log-port* "INFO: server has been stopped"))))

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

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


(define (http-transport:get-time-to-cleanup)
  (let ((res #f))
    (mutex-lock! *http-mutex*)
    (set! res (> (current-seconds) *http-connections-next-cleanup*))
    (mutex-unlock! *http-mutex*)
    res))

(define (http-transport:inc-requests-count)
  (mutex-lock! *http-mutex*)
  (set! *http-requests-in-progress* (+ 1 *http-requests-in-progress*))
  ;; Use this opportunity to slow things down iff there are too many requests in flight
  (if (> *http-requests-in-progress* 5)
      (begin
	(debug:print-info 0 *default-log-port* "Whoa there buddy, ease up...")
	(thread-sleep! 1)))
  (mutex-unlock! *http-mutex*))

(define (http-transport:dec-requests-count proc) 
  (mutex-lock! *http-mutex*)
  (proc)
  (set! *http-requests-in-progress* (- *http-requests-in-progress* 1))
  (mutex-unlock! *http-mutex*))

(define (http-transport:dec-requests-count-and-close-all-connections)
  (set! *http-requests-in-progress* (- *http-requests-in-progress* 1))
  (let loop ((etime (+ (current-seconds) 5))) ;; give up in five seconds
    (if (> *http-requests-in-progress* 0)
	(if (> etime (current-seconds))
	    (begin
	      (thread-sleep! 0.052)
	      (loop etime))
	    (debug:print-error 0 *default-log-port* "requests still in progress after 5 seconds of waiting. I'm going to pass on cleaning up http connections"))
	(close-idle-connections!)))
  (set! *http-connections-next-cleanup* (+ (current-seconds) 10))
  (mutex-unlock! *http-mutex*))

(define (http-transport:inc-requests-and-prep-to-close-all-connections)
  (mutex-lock! *http-mutex*)
  (set! *http-requests-in-progress* (+ 1 *http-requests-in-progress*)))

;; serverdat contains uuid to be used for connection validation
;;
;; NOTE: serverdat must be initialized or created by servdat-init
;;
;; DO NOT USE. Moved to rmt:set-receive-real
;;
;; (define (http-transport:send-receive conn qry-key cmd params #!key (numretries 3))
;;   (let* ((res        #f)
;; 	 (success    #t)
;; 	 (sparams    (with-output-to-string
;; 		       (lambda ()(write params)))))
;;     ;; send the data and get the response extract the needed info from
;;     ;; the http data and process and return it.
;;     (let* ((send-recieve (lambda ()
;; 			   (set! res
;; 				 (with-input-from-request
;; 				  (rmt:conn->uri conn "api")
;; 				  (list (cons 'key qry-key)
;; 					;; (cons 'srvid (servdat-uuid sdat))
;; 					(cons 'cmd cmd)
;; 					(cons 'params sparams))
;; 				   read-string))))
;; 	   (time-out     (lambda ()
;; 			   (thread-sleep! 45)
;; 			   (debug:print 0 *default-log-port* "WARNING: send-receive took more than 45 seconds!!")
;; 			   #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)
;;       (close-idle-connections!)
;;       (thread-terminate! th2)
;;       (if (string? res)
;; 	  (with-input-from-string res
;; 	    (lambda () read))
;; 	  res))))

;; careful closing of connections stored in *runremote*
;;
(define (http-transport:close-connections #!key (area-dat #f))
  (debug:print-info 0 *default-log-port* "http-transport:close-connections doesn't do anything now!"))
;;   (let* ((runremote  (or area-dat *runremote*))
;; 	 (server-dat (if runremote
;;                          (remote-conndat runremote)
;;                          #f))) ;; (hash-table-ref/default *runremote* run-id #f)))
;;     (if (vector? server-dat)
;; 	(let ((api-dat (http-transport:server-dat-get-api-uri server-dat)))
;; 	  (handle-exceptions
;; 	    exn
;; 	    (begin
;; 	      (print-call-chain *default-log-port*)
;; 	      (debug:print-error 0 *default-log-port* " closing connection failed with error: " ((condition-property-accessor 'exn 'message) exn) ", exn=" exn))
;; 	    (close-connection! api-dat)
;;             ;;(close-idle-connections!)
;; 	    #t))
;; 	#f)))


(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-get-server-id     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)
	    ":"
	    (http-transport:server-dat-get-port  vec))
      #f))

(define (http-transport:server-dat-update-last-access vec)
  (if (vector? vec)
      (vector-set! vec 5 (current-seconds))
      (begin
	(print-call-chain (current-error-port))
	(debug:print-error 0 *default-log-port* "call to http-transport:server-dat-update-last-access with non-vector!!"))))

;; initialize servdat for client side, setup needed parameters
;; pass in #f as sdat-in to create sdat
;;
(define (servdat-init sdat-in iface port uuid)
  (let* ((sdat (or sdat-in (make-servdat))))
    (if uuid (servdat-uuid-set! sdat uuid))
    (servdat-host-set! sdat iface)
    (servdat-port-set! sdat port)
    (servdat-api-url-set! sdat (conc "http://" iface ":" port "/api"))
    (servdat-api-uri-set! sdat (uri-reference (servdat-api-url sdat)))
    (servdat-api-req-set! sdat (make-request method: 'POST
					     uri: (servdat-api-uri sdat)))
    ;; set up the http-client parameters
    (max-retry-attempts 1)
    ;; consider all requests indempotent
    (retry-request? (lambda (request)
		      #f))
    (determine-proxy (constantly #f))
   sdat))

;;======================================================================
;; NEW SERVER METHOD
;;======================================================================

;; only use for main.db - need to re-write some of this :(
;;
(define (get-lock-db sdat dbfile)
  (let* ((dbh (db:open-run-db dbfile db:initialize-db))
	 (res (db:get-iam-server-lock dbh dbfile)))
    (sqlite3:finalize! dbh)
    res))


(define *srvpktspec*
  `((server (host    . h)
	    (port    . p)
	    (servkey . k)
	    (pid     . i)
	    (ipaddr  . a)
	    (dbpath  . d))))

(define (register-server pkts-dir pkt-spec host port servkey ipaddr dbpath)
  (let* ((pkt-dat `((host    . ,host)
		    (port    . ,port)
		    (servkey . ,servkey)
		    (pid     . ,(current-process-id))
		    (ipaddr  . ,ipaddr)
		    (dbpath  . ,dbpath)))
	 (uuid    (write-alist->pkt
		   pkts-dir
		   pkt-dat
		   pktspec: pkt-spec
		   ptype: 'server)))
    (debug:print 0 *default-log-port* "Server on "host":"port" registered in pkt "uuid)
    uuid))

(define (get-pkts-dir #!optional (apath #f))
  (let* ((effective-toppath (or *toppath* apath)))
    (assert effective-toppath
	    "ERROR: get-pkts-dir called without *toppath* set. Exiting.")
    (let* ((pdir (conc effective-toppath "/.meta/srvpkts")))
      (if (file-exists? pdir)
	  pdir
	  (begin
	    (create-directory pdir #t)
	    pdir)))))

;; given a pkts dir read 
;;
(define (get-all-server-pkts pktsdir-in pktspec)
  (let* ((pktsdir  (if (file-exists? pktsdir-in)
		       pktsdir-in
		       (begin
			 (create-directory pktsdir-in #t)
			 pktsdir-in)))
	 (all-pkt-files (glob (conc pktsdir "/*.pkt"))))
    (map (lambda (pkt-file)
	   (read-pkt->alist pkt-file pktspec: pktspec))
	 all-pkt-files)))

(define (server-address srv-pkt)
  (conc (alist-ref 'host srv-pkt) ":"
	(alist-ref 'port srv-pkt)))
	
(define (server-ready? host port key) ;; server-address is host:port
  ;; ping the server and ask it
  ;; if it ready
  ;; (let* ((sdat (servdat-init #f host port #f)))
  ;;   (http-transport:send-receive sdat "abc" 'ping '())))
  (let* ((res (with-input-from-request
	       (conc "http://"host":"port"/ping") ;; returns *toppath*/dbname
	       #f
	       read-string)))
    (if (equal? res key)
	#t
	(begin
	  (debug:print-info 0 *default-log-port* "server-ready? key="key", received="res)
	  #f))))
	      
(define (loop-test host port data) ;; server-address is host:port
  ;; ping the server and ask it
  ;; if it ready
  ;; (let* ((sdat (servdat-init #f host port #f)))
  ;;   (http-transport:send-receive sdat "abc" 'ping '())))
  (let* ((payload (sexpr->string data))
	 (res     (with-input-from-request
		   (conc "http://"host":"port"/loop-test")
		   `((data . ,payload))
		   read-string)))
    (string->sexpr res)))
	      
; from the pkts return servers associated with dbpath
;; NOTE: Only one can be alive - have to check on each
;;       in the list of pkts returned
;;
(define (get-viable-servers serv-pkts dbpath)
  (let loop ((tail serv-pkts)
	     (res  '()))
    (if (null? tail)
	res ;; NOTE: sort by age so oldest is considered first
	(let* ((spkt (car tail)))
	  (loop (cdr tail)
		(if (equal? dbpath (alist-ref 'dbpath spkt))
		    (cons spkt res)
		    res))))))

;; from viable servers get one that is alive and ready
;;
(define (get-the-server serv-pkts)
  (let loop ((tail serv-pkts))
    (if (null? tail)
	#f
	(let* ((spkt  (car tail))
	       (host  (alist-ref 'ipaddr spkt))
	       (port  (alist-ref 'port spkt))
	       (dbpth (alist-ref 'dbpath spkt))
	       (addr  (server-address spkt)))
	  (if (server-ready? host port dbpth)
	      spkt
	      (loop (cdr tail)))))))

;; am I the "first" in line server? I.e. my D card is smallest
;; use Z card as tie breaker
;;
(define (get-best-candidate serv-pkts dbpath)
  (if (null? serv-pkts)
      #f
      (let loop ((tail serv-pkts)
		 (best  (car serv-pkts)))
	(if (null? tail)
	    best
	    (let* ((candidate (car tail))
		   (candidate-bd (string->number (alist-ref 'D candidate)))
		   (best-bd      (string->number (alist-ref 'D best)))
		   ;; bigger number is younger
		   (candidate-z  (alist-ref 'Z candidate))
		   (best-z       (alist-ref 'Z best))
		   (new-best     (cond
				  ((> best-bd candidate-bd) ;; best is younger than candidate
				   candidate)
				  ((< best-bd candidate-bd) ;; candidate is younger than best
				   best)
				  (else
				   (if (string>=? best-z candidate-z)
				       best
				       candidate))))) ;; use Z card as tie breaker
	      (if (null? tail)
		  new-best
		  (loop (cdr tail) new-best)))))))
	  

;;======================================================================
;; END NEW SERVER METHOD
;;======================================================================

(define (http-transport:wait-for-server pkts-dir db-file server-key)
  (let* ((sdat *server-info*))
    (let loop ((start-time (current-seconds))
	       (changed    #t)
	       (last-sdat  "not this"))
      (begin ;; let ((sdat #f))
	(thread-sleep! 0.01)
	(debug:print-info 0 *default-log-port* "Waiting for server alive signature")
	(mutex-lock! *heartbeat-mutex*)
	(set! sdat *server-info*)
	(mutex-unlock! *heartbeat-mutex*)
	(if (and sdat
		 (not changed)
		 (> (- (current-seconds) start-time) 2))
	    (begin
	      (debug:print-info 0 *default-log-port* "Received server alive signature, now attempting to lock in server")
	      ;; create a server pkt in *toppath*/.meta/srvpkts
	      
	      ;; TODO:
	      ;;   1. change sdat to stuct
	      ;;   2. add uuid to struct
	      ;;   3. update uuid in sdat here
	      ;;
	      (servdat-uuid-set! sdat
				 (register-server
				  pkts-dir *srvpktspec*
				  (get-host-name)
				  (servdat-port sdat) server-key
				  (servdat-host sdat) db-file))
	      
	      ;; now read pkts and see if we are a contender
	      (let* ((all-pkts     (get-all-server-pkts pkts-dir *srvpktspec*))
		     (viables      (get-viable-servers all-pkts db-file))
		     (best-srv     (get-best-candidate viables db-file))
		     (best-srv-key (if best-srv (alist-ref 'servkey best-srv) #f)))
		(debug:print 0 *default-log-port* "best-srv-key: "best-srv-key", server-key: "server-key)
		;; am I the best-srv, compare server-keys to know
		(if (equal? best-srv-key server-key)
		    (if (get-lock-db sdat db-file) ;; (db:get-iam-server-lock *dbstruct-db* *toppath* run-id)
			(begin
			  (debug:print 0 *default-log-port* "I'm the server!")
			  (servdat-dbfile-set! sdat db-file))
			(begin
			  (debug:print 0 *default-log-port* "I'm not the server, exiting.")
			  (bdat-time-to-exit-set! *bdat* #t)
			  (thread-sleep! 0.2)
			  (exit)))
		    (begin
		      (debug:print 0 *default-log-port*
				   "Keys do not match "best-srv-key", "server-key", exiting.")
		      (bdat-time-to-exit-set! *bdat* #t)
		      (thread-sleep! 0.2)
		      (exit)))
		sdat))
	    (begin ;; sdat not yet contains server info
	      (debug:print-info 0 *default-log-port* "Still waiting, last-sdat=" last-sdat)
	      (sleep 4)
	      (if (> (- (current-seconds) start-time) 120) ;; been waiting for two minutes
		  (begin
		    (debug:print-error 0 *default-log-port* "transport appears to have died, exiting server")
		    (exit))
		  (loop start-time
			(equal? sdat last-sdat)
			sdat))))))))

;; 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 dbname) 
  ;; 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 *default-log-port* "Starting the sync-back, keep alive thread in server")
  (let* ((run-id            (let ((rid (args:get-arg "-run-id"))) ;; consider getting rid of the -run-id mechanism
			      (if rid                             ;; replace with -db
				  (string->number rid)
				  #f)))
	 (db-file           (if dbname
				(db:dbname->path *toppath* dbname)
				(db:run-id->path *toppath* run-id)))
	 (sdat              #f)
	 ;; (tmp-area          (common:get-db-tmp-area))
	 (server-start-time (current-seconds))
	 (pkts-dir          (get-pkts-dir))
	 (server-key        (server:mk-signature))
	 (server-info       (http-transport:wait-for-server pkts-dir db-file server-key ))
	 (iface       (servdat-host server-info))
         (port        (servdat-port server-info))
         (last-access 0)
	 (server-timeout (server:expiration-timeout))
	 (server-log-file (args:get-arg "-log"))) ;; always set when we are a server

    (let loop ((count         0)
	       (server-state 'available)
	       (bad-sync-count 0)
	       (start-time     (current-milliseconds)))
      ;; Use this opportunity to sync the tmp db to megatest.db NOTE: This conflicts with the watchdog syncing?
      (if (not *dbstruct-db* )
	  (let ((watchdog (bdat-watchdog *bdat*)))
	    (debug:print 0 *default-log-port* "SERVER: dbprep")
	    
	    (db:setup dbname) ;; sets *dbstruct-db* as side effect
	    ;; NOW REGISTER THE SERVER in main.db

	    
















	    
	    
	    (debug:print 0 *default-log-port* "SERVER: running, megatest version: " (common:get-full-version)) ;; NOTE: the server is NOT yet marked as running in the log. We do that in the keep-running routine.
	    (if watchdog
		(if (not (member (thread-state watchdog) '(ready running blocked sleeping dead)))
		    (begin
		      (debug:print-info 0 *default-log-port* "Starting watchdog thread (in state "(thread-state watchdog)")")
		      (thread-start! watchdog)))
		(debug:print 0 *default-log-port* "ERROR: *watchdog* not setup, cannot start it."))))
      
      ;; when things go wrong we don't want to be doing the various queries too often
      ;; so we strive to run this stuff only every four seconds or so.
      (let* ((sync-time (- (current-milliseconds) start-time))
	    (rem-time  (quotient (- 4000 sync-time) 1000)))
	(if (and (<= rem-time 4)
		 (>  rem-time 0))
	    (thread-sleep! rem-time)))
      
      (if (< count 1) ;; 3x3 = 9 secs aprox
	  (loop (+ count 1) 'running bad-sync-count (current-milliseconds)))
      
      ;; Check that iface and port have not changed (can happen if server port collides)
      (mutex-lock! *heartbeat-mutex*)
      (set! sdat *server-info*)
      (mutex-unlock! *heartbeat-mutex*)
      
      (if (or (not (equal? (servdat-host sdat) iface))
	      (not (equal? (servdat-port sdat) port)))
	  (let ((new-iface (servdat-host sdat))
		(new-port  (servdat-port sdat)))
	    (debug:print-info 0 *default-log-port* "WARNING: interface changed, refreshing iface and port info")
	    (set! iface new-iface)
	    (set! port  new-port)
	    (if (not *server-id*)
		(set! *server-id* (server:mk-signature)))
            ;; (debug:print 0 *default-log-port* (current-seconds) (current-directory) (current-process-id) (argv))
	    (debug:print 0 *default-log-port* "SERVER STARTED: " iface ":" port " AT " (current-seconds) " server-id: " *server-id*)
	    (flush-output *default-log-port*)))
      
      ;; Transfer *db-last-access* to last-access to use in checking that we are still alive
      (mutex-lock! *heartbeat-mutex*)
      (set! last-access *db-last-access*)
      (mutex-unlock! *heartbeat-mutex*)
      
      (if (common:low-noise-print 120 (conc "server running on " iface ":" port))
	  (begin
             (if (not *server-id*)
              (set! *server-id* (server:mk-signature)))
	     ;; (debug:print 0 *default-log-port* (current-seconds) (current-directory) (current-process-id) (argv))   
	     (debug:print 0 *default-log-port* "SERVER STARTED: " iface ":" port " AT " (current-seconds) " server-id: " *server-id*)
	     (flush-output *default-log-port*)))
      (if (common:low-noise-print 60 "dbstats")
	  (begin
	    (debug:print 0 *default-log-port* "Server stats:")
	    (db:print-current-query-stats)))
      (let* ((hrs-since-start  (/ (- (current-seconds) server-start-time) 3600)))
	(cond
         ((and *server-run*
	       (> (+ last-access server-timeout)
		  (current-seconds)))
          (if (common:low-noise-print 120 "server continuing")
              (debug:print-info 0 *default-log-port* "Server continuing, seconds since last db access: " (- (current-seconds) last-access))
	      (let ((curr-time (current-seconds)))
		(handle-exceptions
		    exn
		    (debug:print 0 *default-log-port* "ERROR: Failed to change timestamp on log file " server-log-file ". Are you out of space on that disk? exn=" exn)
		  (if (and server-log-file (not *server-overloaded*))
		      (set-file-times! server-log-file curr-time curr-time)))))
          (loop 0 server-state bad-sync-count (current-milliseconds)))
         (else
          (debug:print-info 0 *default-log-port* "Server timed out. seconds since last db access: " (- (current-seconds) last-access))
          (http-transport:server-shutdown port)))))))

(define (http-transport:server-shutdown port)
  (begin
    ;;(BB> "http-transport:server-shutdown called")
    (debug:print-info 0 *default-log-port* "Starting to shutdown the server. pid="(current-process-id))
    ;;
    ;; start_shutdown
    ;;

    ;; deregister the server

    
    (bdat-time-to-exit-set! *bdat* #t) ;; tell on-exit to be fast as we've already cleaned up
    (portlogger:open-run-close portlogger:set-port port "released")
    (thread-sleep! 1)

    ;; (debug:print-info 0 *default-log-port* "Max cached queries was    " *max-cache-size*)
    ;; (debug:print-info 0 *default-log-port* "Number of cached writes   " *number-of-writes*)
    ;; (debug:print-info 0 *default-log-port* "Average cached write time "
    ;; 		      (if (eq? *number-of-writes* 0)
    ;; 			  "n/a (no writes)"
    ;; 			  (/ *writes-total-delay*
    ;; 			     *number-of-writes*))
    ;; 		      " ms")
    ;; (debug:print-info 0 *default-log-port* "Number non-cached queries "  *number-non-write-queries*)
    ;; (debug:print-info 0 *default-log-port* "Average non-cached time   "
    ;; 		      (if (eq? *number-non-write-queries* 0)
    ;; 			  "n/a (no queries)"
    ;; 			  (/ *total-non-write-delay* 
    ;; 			     *number-non-write-queries*))
    ;; 		      " ms")
    
    (db:print-current-query-stats)
    (common:save-pkt `((action . exit)
                       (T      . server)
                       (pid    . ,(current-process-id)))
                     *configdat* #t)
    (debug:print-info 0 *default-log-port* "Server shutdown complete. Exiting")
    (exit)))

;; Call this to start the actual server
;;

;; all routes though here end in exit ...
;;
;; start_server? 
;;
(define (http-transport:launch dbname)
  (let* (;; (tmp-area            (common:get-db-tmp-area))
	 ;; (server-start        (conc tmp-area "/.server-start"))
	 ;; (server-started      (conc tmp-area "/.server-started"))
	 ;; (start-time          (common:lazy-modification-time server-start))
	 ;; (started-time        (common:lazy-modification-time server-started))
	 ;; (server-starting     (< start-time started-time)) ;; if start-time is less than started-time then a server is still starting
	 ;; (start-time-old      (> (- (current-seconds) start-time) 5))
         (cleanup-proc        (lambda (msg)
                                (let* ((serv-fname      (conc "server-" (current-process-id) "-" (get-host-name) ".log"))
                                       (full-serv-fname (conc *toppath* "/logs/" serv-fname))
                                       (new-serv-fname  (conc *toppath* "/logs/" "defunct-" serv-fname)))
                                  (debug:print 0 *default-log-port* msg)
                                  (if (common:file-exists? full-serv-fname)
                                      (system (conc "sleep 1;mv -f " full-serv-fname " " new-serv-fname))
                                      (debug:print 0 *default-log-port* "INFO: cannot move " full-serv-fname " to " new-serv-fname))
                                  (exit)))))
    #;(common:save-pkt `((action . start)
		       (T      . server)
		       (pid    . ,(current-process-id)))
		     *configdat* #t)
    (let* ((th2 (make-thread (lambda ()
                               (debug:print-info 0 *default-log-port* "Server run thread started")
                               (http-transport:run 
                                (if (args:get-arg "-server")
                                    (args:get-arg "-server")
                                    "-")
                                )) "Server run"))
           (th3 (make-thread (lambda ()
                               (debug:print-info 0 *default-log-port* "Server monitor thread started")
                               (http-transport:keep-running dbname)
                               "Keep running"))))
      (thread-start! th2)
      (thread-sleep! 0.252) ;; give the server time to settle before starting the keep-running monitor.
      (thread-start! th3)
      (set! *didsomething* #t)
      (thread-join! th2)
      (exit))))
	    
;; 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)
                                          (current-process-id)
					  (argv)))))))

(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*)))

;; run ping in separate process, safest way in some cases
;;
(define (server:ping-server ifaceport)
  (with-input-from-pipe 
   (conc (common:get-megatest-exe) " -ping " ifaceport)
   (lambda ()
     (let loop ((inl (read-line))
		(res "NOREPLY"))
       (if (eof-object? inl)
	   (case (string->symbol res)
	     ((NOREPLY)  #f)
	     ((LOGIN_OK) #t)
	     (else       #f))
	   (loop (read-line) inl))))))


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

;; Call this to start the actual server
;;

;; all routes though here end in exit ...
;;
;; start_server
;;
(define (server:launch dbname)
    (http-transport:launch dbname))

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

;; NOT USED (well, ok, reference in rpc-transport but otherwise not used).
;;
#;(define (server:login toppath)
  (lambda (toppath)
    (set! *db-last-access* (current-seconds)) ;; might not be needed.
    (if (equal? *toppath* toppath)
	#t
	#f)))

;; (define server:sync-lock-token "SERVER_SYNC_LOCK")
;; (define (server:release-sync-lock)
;;   (db:no-sync-del! *no-sync-db* server:sync-lock-token))
;; (define (server:have-sync-lock?)
;;   (let* ((have-lock-pair (db:no-sync-get-lock *no-sync-db* server:sync-lock-token))
;;          (have-lock?     (car have-lock-pair))
;;          (lock-time      (cdr have-lock-pair))
;;          (lock-age       (- (current-seconds) lock-time)))
;;     (cond
;;      (have-lock? #t)
;;      ((>lock-age
;;        (* 3 (configf:lookup-number *configdat* "server" "minimum-intersync-delay" default: 180)))
;;       (server:release-sync-lock)
;;       (server:have-sync-lock?))
;;      (else #f))))



)