Megatest

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

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

(use srfi-1 posix regex regex-case srfi-69 hostinfo md5 message-digest)
;; (use zmq)

(use (prefix sqlite3 sqlite3:))

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

(declare (unit client))

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

;; (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-rpc run-id)
;;   (debug:print 0 *default-log-port* "INFO: client:setup remaining-tries=" remaining-tries)
;;   (if (<= remaining-tries 0)
;;       (begin
;; 	(debug:print-error 0 *default-log-port* "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 *default-log-port* "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 *default-log-port* "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 *default-log-port* "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 *default-log-port* "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 *default-log-port* "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 *default-log-port* "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 *default-log-port* "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-http run-id #!key (remaining-tries 10) (failed-connects 0))

  (debug:print-info 2 *default-log-port* "client:setup remaining-tries=" remaining-tries)
  (let* ((tdbdat (tasks:open-db)))
    (if (<= remaining-tries 0)
	(begin
	  (debug:print-error 0 *default-log-port* "failed to start or connect to server for run-id " run-id)
	  (exit 1))




	(let* ((server-dat (tasks:get-server (db:delay-if-busy tdbdat) run-id)))




	  (debug:print-info 4 *default-log-port* "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))
				  ;; ((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
		      (remote-conndat-set! *runremote* start-res) ;; (hash-table-set! *runremote* run-id start-res)
		      (debug:print-info 2 *default-log-port* "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 *default-log-port* "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)))
		      (remote-conndat-set! *runremote* #f)  ;; (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 *toppath*)
		      (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 *default-log-port* "client:setup, no server registered, remaining-tries=" remaining-tries " num-available=" num-available)
		  (if (< num-available 2)
		      (server:try-running *toppath*))
		  (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)))))))))

;; 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 (client:signal-handler signum)
;;   (signal-mask! signum)
;;   (set! *time-to-exit* #t)
;;   (handle-exceptions
;;    exn
;;    (debug:print 0 *default-log-port* " ... exiting ...")
;;    (let ((th1 (make-thread (lambda ()
;; 			     "") ;; do nothing for now (was flush out last call if applicable)
;; 			   "eat response"))
;; 	 (th2 (make-thread (lambda ()
;; 			     (debug:print-error 0 *default-log-port* "Received ^C, attempting clean exit. Please be patient and wait a few seconds before hitting ^C again.")
;; 			     (thread-sleep! 1) ;; give the flush one second to do it's stuff
;; 			     (debug:print 0 *default-log-port* "       Done.")
;; 			     (exit 4))
;; 			   "exit on ^C timer")))
;;      (thread-start! th2)
;;      (thread-start! th1)
;;      (thread-join! th2))))
;; 
;; ;; client:launch
;; ;; Need to set the signal handler somewhere other than here as this
;; ;; routine will go away.
;; ;;
;; (define (client:launch run-id)
;;   (set-signal-handler! signal/int  client:signal-handler)
;;   (set-signal-handler! signal/term client:signal-handler)
;;   (if (client:setup run-id)
;;       (debug:print-info 2 *default-log-port* "connected as client")
;;       (begin
;; 	(debug:print-error 0 *default-log-port* "Failed to connect as client")
;; 	(exit))))
;; 

(define *run-info-cache*     (make-hash-table)) ;; run info is stable, no need to reget
(define *launch-setup-mutex* (make-mutex))     ;; need to be able to call launch:setup often so mutex it and re-call the real deal only if *toppath* not set
(define *homehost-mutex*     (make-mutex))

(defstruct remote
  (hh-dat            (common:get-homehost)) ;; homehost record ( addr . hhflag )
  (server-url        (if *toppath* (server:read-dotserver->url *toppath*))) ;; (server:check-if-running *toppath*) #f))
  (last-server-check 0)  ;; last time we checked to see if the server was alive
  (conndat           #f)
  (transport         *transport-type*)
  (server-timeout    (or (server:get-timeout) 100))) ;; default to 100 seconds

;; launching and hosts
(defstruct host

(define *wdnum* 0)
(define *wdnum*mutex (make-mutex))
;; currently the primary job of the watchdog is to run the sync back to megatest.db from the db in /tmp
;; if we are on the homehost and we are a server (by definition we are on the homehost if we are a server)
;;
(define (common:watchdog)
  
  (thread-sleep! 0.05) ;; delay for startup
  (let ((legacy-sync (common:run-sync?))
	(debug-mode  (debug:debug-mode 1))
	(last-time   (current-seconds))
        (this-wd-num     (begin (mutex-lock! *wdnum*mutex) (let ((x *wdnum*)) (set! *wdnum* (add1 *wdnum*)) (mutex-unlock! *wdnum*mutex) x)))
        )
    (debug:print-info 0 *default-log-port* "watchdog starting. legacy-sync is " legacy-sync" pid="(current-process-id)" this-wd-num="this-wd-num)
    (if (and legacy-sync (not *time-to-exit*))
	(let ((dbstruct (db:setup)))


	  (debug:print-info 0 *default-log-port* "Server running, periodic sync started.")
	  (let loop ()
            ;;(BB> "watchdog loop.  pid="(current-process-id)" this-wd-num="this-wd-num" *time-to-exit*="*time-to-exit*)
	    ;; sync for filesystem local db writes
	    ;;
	    (mutex-lock! *db-multi-sync-mutex*)
	    (let* ((need-sync        (>= *db-last-access* *db-last-sync*)) ;; no sync since last write
		   (sync-in-progress *db-sync-in-progress*)
		   (should-sync      (and (not *time-to-exit*)
                                          (> (- (current-seconds) *db-last-sync*) 5))) ;; sync every five seconds minimum



		   (will-sync        (and (or need-sync should-sync)
					  (not sync-in-progress)))
		   (start-time       (current-seconds)))

	      ;; (debug:print-info 0 *default-log-port* "need-sync: " need-sync " sync-in-progress: " sync-in-progress " should-sync: " should-sync " will-sync: " will-sync)
	      (if will-sync (set! *db-sync-in-progress* #t))
	      (mutex-unlock! *db-multi-sync-mutex*)
	      (if will-sync
		  (let ((res (common:sync-to-megatest.db dbstruct))) ;; did we sync any data? If so need to set the db touched flag to keep the server alive
		    (if (> res 0) ;; some records were transferred, keep the db alive
			(begin

      (exit)))

(if (args:get-arg "-h")
    (begin
      (print help)
      (exit)))





;; TODO: Move this inside (main)
;;
(if (not (launch:setup))
    (begin
      (print "Failed to find megatest.config, exiting") 
      (exit 1)))

;;======================================================================
;; Database access
;;======================================================================

;; dbstruct vector containing all the relevant dbs like main.db, megatest.db, run.db etc

(use (srfi 18) extras tcp stack) ;; RADT => use of require-extension?
(use sqlite3 srfi-1 posix regex regex-case srfi-69 csv-xml s11n md5 message-digest base64 format dot-locking z3 typed-records)
(import (prefix sqlite3 sqlite3:))
(import (prefix base64 base64:)) ;; RADT => prefix??

(declare (unit db))
(declare (uses common))
(declare (uses keys))
(declare (uses ods))
(declare (uses client))
(declare (uses mt))

(define (db:multi-db-sync dbstruct . options)
  (if (not (launch:setup))
      (debug:print 0 *default-log-port* "ERROR: not able to setup up for megatest.")
      (let* ((mtdb     (dbr:dbstruct-mtdb dbstruct))
	     (tmpdb    (db:get-db dbstruct))
             (refndb   (dbr:dbstruct-refndb dbstruct))
	     (allow-cleanup #t) ;; (if run-ids #f #t))
	     (tdbdat  (tasks:open-db))
	     (servers (tasks:get-all-servers (db:delay-if-busy tdbdat)))
	     (data-synced 0)) ;; count of changed records (I hope)
    
	;; kill servers
	(if (member 'killservers options)
	    (for-each
	     (lambda (server)
	       (tasks:server-delete-record (db:delay-if-busy tdbdat) (vector-ref server 0) "dbmigration")

	       (tasks:kill-server (vector-ref server 2)(vector-ref server 1)))
	     servers))

	;; clear out junk records
	;;
	(if (member 'dejunk options)
	    (begin
	      (db:delay-if-busy mtdb) ;; ok to delay on mtdb

	(lambda (run-id)
	  (set! run-ids (cons run-id run-ids)))
	db
	"SELECT id FROM runs WHERE state != 'deleted' ORDER BY event_time DESC;")
    (reverse run-ids)))))

;; get some basic run stats
;;


;; ( (runname (( state  count ) ... ))
;;   (   ...  

(define (db:get-run-stats dbstruct)
  (let* ((totals       (make-hash-table))
	 (curr         (make-hash-table))
	 (res          '())
	 (runs-info    '()))
    ;; First get all the runname/run-ids
    (db:with-db

;;======================================================================

(use format)
(require-library iup)
(import (prefix iup iup:))
(use canvas-draw)
(import canvas-draw-iup)
(use regex typed-records)

(declare (unit dcommon))

(declare (uses megatest-version))
(declare (uses gutils))
(declare (uses db))
(declare (uses synchash))

				     #:numcol 7
				     #:numcol-visible 7
				     #:numlin-visible 5
				     ))
	 (colnames       (list "Id" "MTver" "Pid" "Host" "Interface:OutPort" "RunTime" "State" "RunId"))
	 (updater        (lambda ()
			   (if (dashboard:monitor-changed? commondat tabdat)

			       (let ((servers (tasks:get-all-servers (db:delay-if-busy tdbdat))))
				 (iup:attribute-set! servers-matrix "NUMLIN" (length servers))
				 ;; (set! colnum 0)
				 ;; (for-each (lambda (colname)
				 ;;    	 ;; (print "colnum: " colnum " colname: " colname)
				 ;;    	 (iup:attribute-set! servers-matrix (conc "0:" colnum) colname)
				 ;;    	 (set! colnum (+ 1 colnum)))
				 ;;           colnames)
				 (set! rownum 1)
				 (for-each 
				  (lambda (server)
				    (set! colnum 0)






				    (let* ((vals (list (vector-ref server 0) ;; Id
						       (vector-ref server 9) ;; MT-Ver
						       (vector-ref server 1) ;; Pid
						       (vector-ref server 2) ;; Hostname
						       (conc (vector-ref server 3) ":" (vector-ref server 4)) ;; IP:Port
						       (seconds->hr-min-sec (- (current-seconds)(vector-ref server 6)))
						       ;; (vector-ref server 5) ;; Pubport
						       ;; (vector-ref server 10) ;; Last beat

						       ;; (vector-ref server 6) ;; Start time
						       ;; (vector-ref server 7) ;; Priority
						       ;; (vector-ref server 8) ;; State
						       (vector-ref server 8) ;; State

						       (vector-ref server 12)  ;; RunId
						       )))
				      (for-each (lambda (val)
						  (let* ((row-col (conc rownum ":" colnum))
							 (curr-val (iup:attribute servers-matrix row-col)))
						    (if (not (equal? (conc val) curr-val))
							(begin
							  (iup:attribute-set! servers-matrix row-col val)
							  (iup:attribute-set! servers-matrix "FITTOTEXT" (conc "C" colnum))))
						    (set! colnum (+ 1 colnum))))
						vals)
				      (set! rownum (+ rownum 1)))
				    (iup:attribute-set! servers-matrix "REDRAW" "ALL"))
				  servers))))))
    (set! colnum 0)
    (for-each (lambda (colname)
		(iup:attribute-set! servers-matrix (conc "0:" colnum) colname)
		(iup:attribute-set! servers-matrix "FITTOTEXT" (conc "C" colnum))
		(set! colnum (+ colnum 1)))
	      colnames)
    ;; (set! dashboard:update-servers-table updater) 

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

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

;; Configurations for server
(tcp-buffer-size 2048)
(max-connections 2048) 

;;======================================================================

;; Call this to start the actual server
;;

(define *db:process-queue-mutex* (make-mutex))

(define (http-transport:run hostn run-id server-id)
  (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)))

				   (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))))
				  (else (continue))))))))
    (http-transport:try-start-server run-id ipaddrstr start-port server-id)))

;; This is recursively run by http-transport:run until sucessful
;;
(define (http-transport:try-start-server run-id ipaddrstr portnum server-id)
  (let ((config-hostname (configf:lookup *configdat* "server" "hostname"))
	(tdbdat          (tasks:open-db)))
    (debug:print-info 0 *default-log-port* "http-transport:try-start-server time=" (seconds->time-string (current-seconds)) " run-id=" run-id " ipaddrsstr=" ipaddrstr " portnum=" portnum " server-id=" server-id " 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 0 *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 run-id
					      ipaddrstr
					      (portlogger:open-run-close portlogger:find-port)
					      server-id))
	   (begin
	     (tasks:server-force-clean-run-record (db:delay-if-busy tdbdat) run-id ipaddrstr portnum " http-transport:try-start-server")
	     (print "ERROR: Tried and tried but could not start the server"))))
     ;; any error in following steps will result in a retry
     (set! *server-info* (list ipaddrstr portnum))
     (tasks:server-set-interface-port 
		     (db:delay-if-busy tdbdat)
		     server-id 
		     ipaddrstr 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")
     (tasks:server-force-clean-run-record (db:delay-if-busy tdbdat) run-id ipaddrstr portnum " http-transport:try-start-server")
     (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 
;;======================================================================

;;======================================================================

	 (api-req      (make-request method: 'POST uri: api-uri))
	 (server-dat   (vector iface port api-uri api-url api-req (current-seconds))))
    server-dat))

;; 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 *default-log-port* "Starting the sync-back, keep alive thread in server for run-id=" run-id)
  (let* ((tdbdat      (tasks:open-db))
	 (server-start-time (current-seconds))
	 (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 *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")
				sdat)
                              (begin
				(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 " server-id " for run " run-id)
				      (tasks:server-delete-record (db:delay-if-busy tdbdat) server-id "failed to start, never received 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 (server:get-timeout))
	 (server-going  #f))

    (let loop ((count         0)
	       (server-state 'available)
	       (bad-sync-count 0)
	       (start-time     (current-milliseconds)))
      ;;(BB> "http-transport: top of loop; count="count" server-state="server-state" bad-sync-count="bad-sync-count" server-going="server-going)
      ;; Use this opportunity to sync the tmp db to megatest.db
      (if (not server-going) ;; *dbstruct-db* 
	    ;; Removed code is pasted below (keeping it around until we are clear it is not needed).
	    ;; no *dbstruct-db* yet, set running after our first pass through and start the db
	    (if (eq? server-state 'available)
		(let ((new-server-id (tasks:server-am-i-the-server? (db:delay-if-busy tdbdat) run-id))) ;; try to ensure no double registering of servers
		  (if (equal? new-server-id server-id)
		      (begin
			(tasks:server-set-state! (db:delay-if-busy tdbdat) server-id "dbprep")
                        ;;(BB> "http-transport: ->dbprep")
			(thread-sleep! 0.5) ;; give some margin for queries to complete before switching from file based access to server based access

			(set! *dbstruct-db*  (db:setup)) ;;  run-id))
			(set! server-going #t)
			(tasks:server-set-state! (db:delay-if-busy tdbdat) server-id "running")
                        ;;(BB> "http-transport: ->running")
			(server:write-dotserver *toppath* iface port (current-process-id) 'http)

                        (thread-start! *watchdog*)
                        (server:complete-attempt *toppath*))
		      (begin ;; gotta exit nicely
                        ;;(BB> "http-transport: ->collision")
			(tasks:server-set-state! (db:delay-if-busy tdbdat) server-id "collision")
			(http-transport:server-shutdown server-id port))))))
      
      ;; 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? sdat (list iface port)))
	      (not server-id))
	  (begin 
	    (debug:print-info 0 *default-log-port* "interface changed, refreshing iface and port info")
	    (set! iface (car sdat))
	    (set! port  (cadr sdat))
            (server:write-dotserver *toppath* iface port (current-process-id) 'http)))

      
      ;; 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*)




      ;; (debug:print 11 *default-log-port* "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" b"wait-on-running"))) ;; wait on running tasks (if not true then exit on time out)
      ;;
      (let* ((hrs-since-start  (/ (- (current-seconds) server-start-time) 3600))
	     (adjusted-timeout (if (> hrs-since-start 1)
				   (- server-timeout (inexact->exact (round (* hrs-since-start 60))))  ;; subtract 60 seconds per hour
				   server-timeout)))
	(if (common:low-noise-print 120 "server timeout")
	    (debug:print-info 0 *default-log-port* "Adjusted server timeout: " adjusted-timeout))
	(cond
         ((not (server:confirm-dotserver *toppath* iface port (current-process-id) 'http))
          (debug:print-info 0 *default-log-port* "Server .server file does not exist or contents do not match.  Initiate server shutdown.")
          (http-transport:server-shutdown server-id port))
         ((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)))
          ;;
          ;; 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)

          ;;     (tasks:server-set-state! tdb server-id "running"))
          ;;
          (loop 0 server-state bad-sync-count (current-milliseconds)))
         (else
          (debug:print-info 0 *default-log-port* "Server timeed out. seconds since last db access: " (- (current-seconds) last-access))
          (http-transport:server-shutdown server-id port)))))))

;; code cut out from above
;;
;; (condition-case
;;  ;; (if (and (member (mutex-state *db-sync-mutex*) '(abandoned not-abandoned))
;;  ;;	      (> (- (current-seconds) *db-last-sync*) 5)) ;; if not currently being synced nor recently synced
;;  (db:sync-touched *dbstruct-db* *run-id* force-sync: #t) ;; usually done in the watchdog, not here.
;;  ((sync-failed)(cond
;; 		    ((> bad-sync-count 10) ;; time to give up
;; 		     (http-transport:server-shutdown server-id port))
;; 		    (else ;; (> bad-sync-count 0)  ;; we've had a fail or two, delay and loop
;; 		     (thread-sleep! 5)
;; 		     (loop count server-state (+ bad-sync-count 1)))))
;;  ((exn)
;;   (debug:print-error 0 *default-log-port* "error from sync code other than 'sync-failed. Attempting to gracefully shutdown the server")
;;   (tasks:server-delete-record (db:delay-if-busy tdbdat) server-id " http-transport:keep-running crashed")
;;   (exit)))
;; (set! sync-time  (- (current-milliseconds) start-time))
;; (set! rem-time (quotient (- 4000 sync-time) 1000))
;; (debug:print 4 *default-log-port* "SYNC: time= " sync-time ", rem-time=" rem-time)
;; 
;; (if (and (<= rem-time 4)
;; 	     (> rem-time 0))
;; 	(thread-sleep! rem-time)
;; 	(thread-sleep! 4))) ;; fallback for if the math is changed ...

(define (http-transport:server-shutdown server-id port)
  (let ((tdbdat (tasks:open-db)))
    ;;(BB> "http-transport:server-shutdown called")
    (debug:print-info 0 *default-log-port* "Starting to shutdown the server. pid="(current-process-id))
    ;;
    ;; start_shutdown
    ;;
    (tasks:server-set-state! (db:delay-if-busy tdbdat) server-id "shutting-down")
    (set! *time-to-exit* #t) ;; tell on-exit to be fast as we've already cleaned up
    (portlogger:open-run-close portlogger:set-port port "released")
    (thread-sleep! 5)

;; (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)
    
    (debug:print-info 0 *default-log-port* "Server shutdown complete. Exiting")
    (tasks:server-delete-record (db:delay-if-busy tdbdat) server-id " http-transport:keep-running complete")
    ;; if the .server file contained :myport then we can remove it
    (server:remove-dotserver-file *toppath* port)
    ;;(BB> "http-transport:server-shutdown -> exit")
    (exit)))

;; all routes though here end in exit ...
;;
;; start_server? 
;;
(define (http-transport:launch run-id)
  (server:attempting-start *toppath*)
  (let* ((tdbdat (tasks:open-db)))
    (set! *run-id*   run-id)
    (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 (and (server:read-dotserver *toppath*)
             (server:check-if-running run-id))
	(begin
	  (debug:print 0 *default-log-port* "INFO: Server for run-id " run-id " already running")
	  (exit 0))
	(begin ;; ok, no server detected, clean out any lingering records
          (tasks:server-force-clean-running-records-for-run-id  (db:delay-if-busy tdbdat) run-id "notresponding")))
    (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)
		(loop (tasks:server-lock-slot (db:delay-if-busy tdbdat) 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 *default-log-port* "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")
                (server:complete-attempt *toppath*)
		))
	  (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")
					  "-")
				      run-id
				      server-id)) "Server run"))
		 (th3 (make-thread (lambda ()
				     (debug:print-info 0 *default-log-port* "Server monitor thread started")
				     (http-transport:keep-running server-id 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 0 *default-log-port* " ... exiting ...")
   (let ((th1 (make-thread (lambda ()

;; The watchdog is to keep an eye on things like db sync etc.
;;
(define *watchdog* (make-thread common:watchdog "Watchdog thread"))

(if (not (args:get-arg "-server"))
    (thread-start! *watchdog*)) ;; if starting a server; wait till we get to running state before kicking off watchdog
;;(BB> "thread-start! watchdog")


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



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

      (debug:print-info 0 *default-log-port* "Sending log output to " (args:get-arg "-log"))
      (set! *default-log-port* oup)))

(if (or (args:get-arg "-h")
	(args:get-arg "-help")
	(args:get-arg "--help"))
    (begin
      (print help)

	    (debug:print-error 0 *default-log-port* "Parameter to -envdelta should be new=star-end")))))

;;======================================================================
;; 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")

    ;; Server? Start up here.
    ;;

    (let ((tl        (launch:setup))
	;; (run-id    (and (args:get-arg "-run-id")
	;; 		  (string->number (args:get-arg "-run-id"))))
          (transport-type (string->symbol (or (args:get-arg "-transport") "http"))))
      ;; (if run-id
      ;;   (begin
      (server:launch 0 transport-type)
      (set! *didsomething* #t)))
;;     ;; (debug:print-error 0 *default-log-port* "server requires run-id be specified with -run-id")))
;; 
;;     ;; Not a server? This section will decide how to communicate
;;     ;;
;;     ;;  Setup client for all expect listed here
;;     (if (null? (lset-intersection 
;; 		equal?
;; 		(hash-table-keys args:arg-hash)
;; 		'("-list-servers"
;; 		  "-stop-server"
;;                   "-kill-server"
;; 		  "-show-cmdinfo"
;; 		  "-list-runs"
;; 		  "-ping")))
;; 	(if (launch:setup)
;; 	    (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" "-create-megatest-area" "-create-test")
;; 		      (eq? (length (hash-table-keys args:arg-hash)) 0))
;; 		  (debug:print-info 1 *default-log-port* "Server connection not needed")
;; 		  (begin
;; 		    ;; (if run-id 
;; 		    ;;     (client:launch run-id) 
;; 		    ;;     (client:launch 0)      ;; without run-id we'll start a server for "0"
;; 		    #t
;; 		    ))))))

(if (or (args:get-arg "-list-servers")
	(args:get-arg "-stop-server")
        (args:get-arg "-kill-server"))
    (let ((tl (launch:setup)))
      (if tl 
	  (let* ((tdbdat  (tasks:open-db))

;; else return #f to let the calling proc know that there is no server available
;;
(define (rmt:get-connection-info areapath) ;; TODO: push areapath down.
  (let ((cinfo (remote-conndat *runremote*))
        (run-id 0))
    (if cinfo
	cinfo
	(if (tasks:server-running-or-starting? (db:delay-if-busy (tasks:open-db)) run-id)
	    (client:setup run-id)
	    #f))))

(define *send-receive-mutex* (make-mutex)) ;; should have separate mutex per run-id

;; RA => e.g. usage (rmt:send-receive 'get-var #f (list varname))
;;
(define (rmt:send-receive cmd rid params #!key (attemptnum 1)) ;; start attemptnum at 1 so the modulo below works as expected

      (debug:print-info 12 *default-log-port* "rmt:send-receive, case  3")
      (rmt:open-qry-close-locally cmd 0 params))

     ;; on homehost and this is a write, we already have a server, but server has died
     ((and (cdr (remote-hh-dat *runremote*))         ;; on homehost
           (not (member cmd api:read-only-queries))  ;; this is a write
           (remote-server-url *runremote*)           ;; have a server
           (not (server:read-dotserver *toppath*)))  ;; server has died.
      (set! *runremote* #f)
      (mutex-unlock! *rmt-mutex*)
      (debug:print-info 12 *default-log-port* "rmt:send-receive, case  4.1")
      (rmt:send-receive cmd rid params attemptnum: attemptnum))

     ;; on homehost and this is a write, we already have a server
     ((and (cdr (remote-hh-dat *runremote*))         ;; on homehost
           (not (member cmd api:read-only-queries))  ;; this is a write
           (remote-server-url *runremote*))          ;; have a server
      (mutex-unlock! *rmt-mutex*)
      (debug:print-info 12 *default-log-port* "rmt:send-receive, case  4")
      (rmt:open-qry-close-locally cmd 0 params))

     ;; commented by bb; this was blocking server passive start on write on homehost (case 5)
     ;; ;; on homehost and this is a write, we have a server (we know because case 4 checked)
     ;; ((and (cdr (remote-hh-dat *runremote*))         ;; on homehost
     ;;       (not (member cmd api:read-only-queries)))
     ;;  (mutex-unlock! *rmt-mutex*)
     ;;  (debug:print-info 12 *default-log-port* "rmt:send-receive, case  4.1")
     ;;  (rmt:open-qry-close-locally cmd 0 params))

     
     ;;  on homehost, no server contact made and this is a write, passively start a server 
     ((and (cdr (remote-hh-dat *runremote*)) ; new
           (not (remote-server-url *runremote*))
	   (not (member cmd api:read-only-queries)))
      (debug:print-info 12 *default-log-port* "rmt:send-receive, case  5")
      (let ((server-url (server:read-dotserver->url *toppath*))) ;; (server:check-if-running *toppath*))) ;; Do NOT want to run server:check-if-running - very expensive to do for every write call
	(if server-url
	    (remote-server-url-set! *runremote* server-url) ;; the string can be consumed by the client setup if needed
	    (if (not (server:start-attempted? *toppath*))
		(server:kind-run *toppath*))))
             (mutex-unlock! *rmt-mutex*)
             (debug:print-info 12 *default-log-port* "rmt:send-receive, case  5.1")
             (rmt:open-qry-close-locally cmd 0 params))



     ;;;
           ;;     (begin                            ;; not on homehost, start server and wait
            ;; (mutex-unlock! *rmt-mutex*)
	    ;; (debug:print-info 12 *default-log-port* "rmt:send-receive, case  5.2")
	    ;; (tasks:start-and-wait-for-server (tasks:open-db) 0 15)
            ;; (rmt:send-receive cmd rid params attemptnum: attemptnum))   ;)  ;)
;;;;
     
     ;; if not on homehost ensure we have a connection to a live server
     ;; NOTE: we *have* a homehost record by now

     ;; ((and (not (cdr (remote-hh-dat *runremote*)))        ;; not on a homehost 
     ;;       (not (remote-conndat *runremote*))             ;; and no connection
     ;;       (server:read-dotserver *toppath*))             ;; .server file exists
     ;;  ;; something caused the server entry in tdb to disappear, but the server is still running
     ;;  (server:remove-dotserver-file *toppath* ".*")
     ;;  (mutex-unlock! *rmt-mutex*)
     ;;  (debug:print-info 12 *default-log-port* "rmt:send-receive, case  20")
     ;;  (rmt:send-receive cmd rid params attemptnum: (add1 attemptnum)))

     ((and (not (cdr (remote-hh-dat *runremote*)))        ;; not on a homehost 
           (not (remote-conndat *runremote*)))            ;; and no connection
      (debug:print-info 12 *default-log-port* "rmt:send-receive, case  6  hh-dat: " (remote-hh-dat *runremote*) " conndat: " (remote-conndat *runremote*))
      (mutex-unlock! *rmt-mutex*)
      (tasks:start-and-wait-for-server (tasks:open-db) 0 15)
      (remote-conndat-set! *runremote* (rmt:get-connection-info *toppath*)) ;; calls client:setup which calls client:setup-http
      (rmt:send-receive cmd rid params attemptnum: attemptnum)) ;; TODO: add back-off timeout as
     ;; all set up if get this far, dispatch the query
     ((cdr (remote-hh-dat *runremote*)) ;; we are on homehost
      (mutex-unlock! *rmt-mutex*)
      (debug:print-info 12 *default-log-port* "rmt:send-receive, case  7")
      (rmt:open-qry-close-locally cmd (if rid rid 0) params))

	       (exit 1)))
	    (begin
	      (debug:print 0 *default-log-port* "WARNING: communication failed. Trying again, try num: " attemptnum)
	      (remote-conndat-set!    *runremote* #f)
	      (remote-server-url-set! *runremote* #f)
              (debug:print-info 12 *default-log-port* "rmt:send-receive, case  9.1")
	      (mutex-unlock! *rmt-mutex*)
	      (tasks:start-and-wait-for-server (tasks:open-db) 0 15)
	      (rmt:send-receive cmd rid params attemptnum: (+ attemptnum 1)))))))))

;; (define (rmt:update-db-stats run-id rawcmd params duration)
;;   (mutex-lock! *db-stats-mutex*)
;;   (handle-exceptions
;;    exn
;;    (begin

;; 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 srfi-1 posix regex regex-case srfi-69 hostinfo md5 message-digest directory-utils posix-extras)
;; (use zmq)

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

(declare (unit server))

(declare (uses common))

;;

;; all routes though here end in exit ...
;;
;; start_server
;;
(define (server:launch run-id transport-type)
  ;;(BB> "server:launch fired for run-id="run-id" transport-type="transport-type)

  (let ((attempt-in-progress (server:start-attempted? *toppath*))) ; check for .server-starting
    (when attempt-in-progress
      (debug:print-info 0 *default-log-port* "Server start attempt in progress in other process (=> "attempt-in-progress"<=).  Aborting server launch attempt in this process ("(current-process-id)")")
      (exit)))
      
  (let ((dotserver-url (server:check-if-running *toppath*))) ;; check for .server  
    (when dotserver-url
      (debug:print-info 0 *default-log-port* "Server already running (=> "dotserver-url"<=).  Aborting server launch attempt in this process ("(current-process-id)")")
      (exit)
      ))
  
  (case transport-type
    ((http)(http-transport:launch run-id))
    ;;((nmsg)(nmsg-transport:launch run-id))
    ((rpc)  (rpc-transport:launch run-id))
    (else (debug:print-error 0 *default-log-port* "unknown server type " transport-type)))

  ;; is this a good place to print server exit stats?
  (debug:print 0 "SERVER: max parallel api requests: " *max-api-process-requests*)
  
  )
;;       (else   (debug:print-error 0 *default-log-port* "No known transport set, transport=" transport ", using rpc")
;; 	      (rpc-transport:launch run-id)))))

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

;; Get the transport
(define (server:get-transport)

(define (server:reply return-addr query-sig success/fail result)
  (debug:print-info 11 *default-log-port* "server:reply return-addr=" return-addr ", result=" result)
  ;; (send-message pubsock target send-more: #t)
  ;; (send-message pubsock 
  (case (server:get-transport)
    ((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-error 0 *default-log-port* "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
;;   incidental: rotate logs in logs/ dir.
;;
(define  (server:run areapath) ;; areapath is *toppath* for a given testsuite area
  (let* ((curr-host   (get-host-name))
         (attempt-in-progress (server:start-attempted? areapath))
         (dot-server-url (server:check-if-running areapath))
	 (curr-ip     (server:get-best-guess-address curr-host))
	 (curr-pid    (current-process-id))
	 (homehost    (common:get-homehost)) ;; configf:lookup *configdat* "server" "homehost" ))
	 (target-host (car homehost))
	 (testsuite   (common:get-testsuite-name))
	 (logfile     (conc areapath "/logs/server.log"))
	 (cmdln (conc (common:get-megatest-exe)
		      " -server " (or target-host "-") " -run-id " 0 (if (equal? (configf:lookup *configdat* "server" "daemonize") "yes")
									      (conc " -daemonize -log " logfile)
									      "")

		      " -m testsuite:" testsuite)) ;; (conc " >> " logfile " 2>&1 &")))))
	 (log-rotate  (make-thread common:rotate-logs  "server run, rotate logs thread")))
    ;; we want the remote server to start in *toppath* so push there
    (push-directory areapath)
    (cond
     (attempt-in-progress
      (debug:print 0 *default-log-port* "INFO: Not trying to start server because attempt is in progress: "attempt-in-progress))
     (dot-server-url
            (debug:print 0 *default-log-port* "INFO: Not trying to start server because one is already running : "dot-server-url))
     (else
      (debug:print 0 *default-log-port* "INFO: Trying to start server (" cmdln ") ...")
      (thread-start! log-rotate)

      ;; host.domain.tld match host?
      (if (and target-host 
               ;; look at target host, is it host.domain.tld or ip address and does it 
               ;; match current ip or hostname
               (not (string-match (conc "("curr-host "|" curr-host"\\..*)") target-host))
               (not (equal? curr-ip target-host)))
          (begin
            (debug:print-info 0 *default-log-port* "Starting server on " target-host ", logfile is " logfile)
            (setenv "TARGETHOST" target-host)))
      
      (setenv "TARGETHOST_LOGF" logfile)
      (common:wait-for-normalized-load 4 " delaying server start due to load" remote-host: (get-environment-variable "TARGETHOST")) ;; do not try starting servers on an already overloaded machine, just wait forever
      (system (conc "nbfake " cmdln))
      (unsetenv "TARGETHOST_LOGF")
      (if (get-environment-variable "TARGETHOST")(unsetenv "TARGETHOST"))
      (thread-join! log-rotate)
      (pop-directory)))))
    










































































































(define (server:get-client-signature) ;; BB> why is this proc named "get-"?  it returns nothing -- set! has not return value.
  (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 areapath)
  (let ((last-run-time (hash-table-ref/default *server-kind-run* areapath #f)))
    (if (or (not last-run-time)
	    (> (- (current-seconds) last-run-time) 30))
	(begin
	  (server:run areapath)
	  (hash-table-set! *server-kind-run* areapath (current-seconds))))))

(define server:try-running server:run) ;; there is no more per-run servers ;; REMOVE ME. BUG.

(define (server:attempting-start areapath)
  (with-output-to-file
      (conc areapath "/.starting-server")
    (lambda ()
      (print (current-process-id) " on " (get-host-name)))))
  
(define (server:complete-attempt areapath)
  (delete-file* (conc areapath "/.starting-server")))
  
(define (server:start-attempted? areapath)
  (let ((flagfile (conc areapath "/.starting-server")))
    (handle-exceptions
     exn
     #f  ;; if things go wrong pretend we can't see the file
     (cond
      ((and (file-exists? flagfile)
            (< (- (current-seconds)
                  (file-modification-time flagfile))
               15)) ;; exists and less than 15 seconds old
       (with-input-from-file flagfile (lambda () (read-line))))
      ((file-exists? flagfile) ;; it is stale.
       (server:complete-attempt areapath)
       #f)
      (else #f)))))

(define (server:read-dotserver areapath)
  (let ((dotfile (conc areapath "/.server")))
    (handle-exceptions
     exn
     #f  ;; if things go wrong pretend we can't see the file
     (cond
      ((not (file-exists? dotfile))
       #f)
      ((not (file-read-access? dotfile))
       #f)
      ((> (server:dotserver-age-seconds areapath) (+ 5 (server:get-timeout)))
       (server:remove-dotserver-file areapath ".*")
       #f)
      (else
       (let* ((line
               (with-input-from-file
                   dotfile
                 (lambda ()
                   (read-line))))
              (tokens (if (string? line) (string-split line ":") #f)))
         (cond
          ((eq? 4 (length tokens))
           tokens)
          (else #f))))))))
       
(define (server:read-dotserver->url areapath)
  (let ((dotserver-tokens (server:read-dotserver areapath)))
    (if dotserver-tokens
        (conc (list-ref dotserver-tokens 0) ":" (list-ref dotserver-tokens 1))
        #f)))

;; write a .server file in *toppath* with hostport
;; return #t on success, #f otherwise
;;
(define (server:write-dotserver areapath host port pid transport)
  (let ((lock-file   (conc areapath "/.server.lock"))
	(server-file (conc areapath "/.server")))
    (if (common:simple-file-lock lock-file)
	(let ((res (handle-exceptions
		    exn
		    #f ;; failed for some reason, for the moment simply return #f
		    (with-output-to-file server-file
		      (lambda ()
			(print (conc host ":" port ":" pid ":" transport))))
		    #t)))
	  (debug:print-info 0 *default-log-port* "server file " server-file " for " host ":" port " created pid="pid)
	  (common:simple-file-release-lock lock-file)
	  res)
	#f)))


;; this will check that the .server file present matches the server calling this procedure.
;; if parameters match (this-pid and transport) the file will be touched and #t returned
;; otherwise #f will be returned.
(define (server:confirm-dotserver areapath this-iface this-port this-pid this-transport)
  (let* ((tokens (server:read-dotserver areapath)))
    (cond
     ((not tokens)
      (debug:print-info 0 *default-log-port* "INFO: .server file does not exist.")
      #f)
     ((not (eq? 4 (length tokens)))
      (debug:print-info 0 *default-log-port* "INFO: .server file is corrupt.  There are not 4 tokens as expeted; there are "(length tokens)".")
      #f)
     ((not (equal? this-iface (list-ref tokens 0)))
      (debug:print-info 0 *default-log-port* "INFO: .server file mismatch.  for iface, server has value >"(list-ref tokens 0)"< but this server's value is >"this-iface"<")
      #f)
     ((not (equal? (->string this-port)  (list-ref tokens 1)))
      (debug:print-info 0 *default-log-port* "INFO: .server file mismatch.  for port, .server has value >"(list-ref tokens 1)"< but this server's value is >"(->string this-port)"<")
      #f)
     ((not (equal? (->string this-pid)   (list-ref tokens 2)))
      (debug:print-info 0 *default-log-port* "INFO: .server file mismatch.  for pid, .server has value >"(list-ref tokens 2)"< but this server's value is >"(->string this-pid)"<")
      #f)
     ((not (equal? (->string this-transport) (->string (list-ref tokens 3))))
      (debug:print-info 0 *default-log-port* "INFO: .server file mismatch.  for transport, .server has value >"(list-ref tokens 3)"< but this server's value is >"this-transport"<")
      #f)
     (else (server:touch-dotserver areapath)
      #t))))

(define (server:touch-dotserver areapath)
  (let ((server-file (conc areapath "/.server")))
    (change-file-times server-file (current-seconds) (current-seconds))))

(define (server:dotserver-age-seconds areapath)
  (let ((server-file (conc areapath "/.server")))
    (begin
      (handle-exceptions
       exn
       #f
       (- (current-seconds)
          (file-modification-time server-file))))))
    
(define (server:remove-dotserver-file areapath hostport)
  (let ((dotserver-url   (server:read-dotserver->url areapath))
	(server-file (conc areapath "/.server"))
	(lock-file   (conc areapath "/.server.lock")))
    (if (and dotserver-url (string-match (conc ".*:" hostport "$") dotserver-url)) ;; port matches, good enough info to decide to remove the file
	(if (common:simple-file-lock lock-file)
	    (begin
	      (handle-exceptions
	       exn
	       #f
	       (delete-file* server-file))
	      (debug:print-info 0 *default-log-port* "server file " server-file " for " hostport " removed")
	      (common:simple-file-release-lock lock-file))
            (debug:print-info 0 *default-log-port* "server file " server-file " for " hostport " NOT removed - could not get lock."))
        (debug:print-info 0 *default-log-port* "server file " server-file " for " hostport " NOT removed - dotserver-url("dotserver-url") did not match hostport pattern ("hostport")"))))

;; no longer care if multiple servers are started by accident. older servers will drop off in time.
;;
(define (server:check-if-running areapath)




  (let* ((dotserver-url (server:read-dotserver->url areapath))) ;; tdbdat (tasks:open-db)))
    (if dotserver-url
	(let* ((res (case *transport-type*
		      ((http)(server:ping-server dotserver-url))
		      ;; ((nmsg)(nmsg-transport:ping (tasks:hostinfo-get-interface server)
		      )))
	  (if res
	      dotserver-url
	      (begin
                (server:remove-dotserver-file areapath ".*") ;; remove stale dotserver
                #f)))
	#f)))






;; called in megatest.scm, host-port is string hostname:port
;;
;; NOTE: This is NOT called directly from clients as not all transports support a client running
;;       in the same process as the server.
;;
(define (server:ping host-port-in #!key (do-exit #f))
  (let ((host:port (if (not host-port-in) ;; use read-dotserver to find
		       (server:read-dotserver->url *toppath*)
		       (if (number? host-port-in) ;; we were handed a server-id
			   (let ((srec (tasks:get-server-by-id (db:delay-if-busy (tasks:open-db)) host-port-in)))
			     ;; (print "srec: " srec " host-port-in: " host-port-in)
			     (if srec
				 (conc (vector-ref srec 3) ":" (vector-ref srec 4))
				 (conc "no such server-id " host-port-in)))
			   host-port-in))))
    (let* ((host-port (if host:port
			  (let ((slst (string-split   host:port ":")))
			    (if (eq? (length slst) 2)
				(list (car slst)(string->number (cadr slst)))
				#f))
			  #f))
	   (toppath       (launch:setup)))
      ;; (print "host-port=" host-port)
      (if (not host-port)
	  (begin
	    (if host-port-in
		(debug:print 0 *default-log-port*  "ERROR: bad host:port"))
	    (if do-exit (exit 1))
	    #f)
	  (let* ((iface      (car host-port))
		 (port       (cadr host-port))
		 (server-dat (http-transport:client-connect iface port))
		 (login-res  (rmt:login-no-auto-client-setup server-dat)))
	    (if (and (list? login-res)
		     (car login-res))
		(begin
		  (print "LOGIN_OK")
		  (if do-exit (exit 0)))

		(begin
		  (print "LOGIN_FAILED")
		  (if do-exit (exit 1)))))))))


;; 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 ()

(define (tasks:hostinfo-get-interface   vec)    (vector-ref  vec 1))
(define (tasks:hostinfo-get-port        vec)    (vector-ref  vec 2))
(define (tasks:hostinfo-get-pubport     vec)    (vector-ref  vec 3))
(define (tasks:hostinfo-get-transport   vec)    (vector-ref  vec 4))
(define (tasks:hostinfo-get-pid         vec)    (vector-ref  vec 5))
(define (tasks:hostinfo-get-hostname    vec)    (vector-ref  vec 6))

(define (tasks:server-lock-slot mdb run-id)
  (tasks:server-clean-out-old-records-for-run-id mdb run-id " tasks:server-lock-slot")
  (if (< (tasks:num-in-available-state mdb run-id) 4)
      (begin 
	(tasks:server-set-available mdb run-id)
	(thread-sleep! (/ (random 1500) 1000)) ;; (thread-sleep! 2) ;; Try removing this. It may not be needed.
	(tasks:server-am-i-the-server? mdb run-id))
      #f))
	
;; 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
   ;; (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)
       (set! res num-in-queue))
     mdb
     "SELECT count(id) FROM servers WHERE run_id=? AND state = 'available' AND (strftime('%s','now') - start_time) < 30 ;"
     run-id)
    res))

(define (tasks:num-servers-non-zero-running mdb)
  (let ((res 0))
    (sqlite3:for-each-row
     (lambda (num-running)
       (set! res num-running))
     mdb
     "SELECT count(id) FROM servers WHERE run_id != 0 AND state = 'running';")
    res))

(define (tasks:server-clean-out-old-records-for-run-id mdb run-id tag)
  (sqlite3:execute mdb "UPDATE servers SET state=?,heartbeat=strftime('%s','now') WHERE state in ('available','dbprep','shutting-down') AND (strftime('%s','now') - start_time) > 50 AND run_id=?;"
		   (conc "defunct" tag) run-id))

(define (tasks:server-force-clean-running-records-for-run-id mdb run-id tag)
  (sqlite3:execute mdb "UPDATE servers SET state=?,heartbeat=strftime('%s','now') WHERE state = 'running' AND run_id=?;"
		   (conc "defunct" tag) run-id))

(define (tasks:server-force-clean-run-record mdb run-id iface port tag)
  (sqlite3:execute mdb "UPDATE servers SET state=?,heartbeat=strftime('%s','now') WHERE state = 'running' AND run_id=? AND interface=? AND port=?;"
		   (conc "defunct" tag) run-id iface port))


;; BB> adding missing func for --list-servers
(define (tasks:server-deregister mdb hostname #!key (pullport #f) (pid #f) (action #f)) ;;pullport pid: pid action: 'delete))
  (if (eq? action 'delete)
      (sqlite3:execute mdb "DELETE FROM servers WHERE pid=? AND port=? AND hostname=?;" pid pullport hostname)
      (sqlite3:execute mdb "UPDATE servers SET state='defunct', heartbeat=strftime('%s','now') WHERE hostname=? AND pid=?;"
                       hostname pid)))

(define (tasks:server-delete-records-for-this-pid mdb tag)
  (sqlite3:execute mdb "UPDATE servers SET state=?,heartbeat=strftime('%s','now') WHERE hostname=? AND pid=?;"
		   (conc "defunct" tag) (get-host-name) (current-process-id)))

(define (tasks:server-delete-record mdb server-id tag) 
  (sqlite3:execute mdb "UPDATE servers SET state=?,heartbeat=strftime('%s','now') WHERE id=?;"
		   (conc "defunct" tag) server-id)
  ;; use this opportuntity to clean out records over one month old or over 10 minutes old with port = -1 (i.e. a never used placeholder)
  (sqlite3:execute mdb "DELETE FROM servers WHERE state not in ('running','shutting-down','dbprep') AND (strftime('%s','now') - start_time) > 2628000;")
  (sqlite3:execute mdb "DELETE FROM servers WHERE state like 'defunct%' AND port=-1 AND (strftime('%s','now') - start_time) > 600;")
  )

(define (tasks:server-set-state! mdb server-id state)
  (sqlite3:execute mdb "UPDATE servers SET state=?,heartbeat=strftime('%s','now') WHERE id=?;" state server-id))

(define (tasks:server-set-interface-port mdb server-id interface port)
  (sqlite3:execute mdb "UPDATE servers SET interface=?,port=?,heartbeat=strftime('%s','now') WHERE id=?;" interface port server-id))

;; Get random port not used in long time
;;
(define (tasks:server-get-next-port mdb)
  (let* ((lownum        30000)
	(highnum        64000)
	(used-ports     '())
	(get-rand-port  (lambda ()
			  (+ lownum (random (- highnum lownum)))))
	(port-param     (if (and (args:get-arg "-port")
				 (string->number (args:get-arg "-port")))
			    (string->number (args:get-arg "-port"))
			    #f))
	;; (config-port    (if (and (config-lookup  *configdat* "server" "port")
	;; 			 (string->number (config-lookup  *configdat* "server" "port")))
	;; 		    (string->number (config-lookup  *configdat* "server" "port"))
	;; 		    #f))
	)
    (sqlite3:for-each-row
     (lambda (port)
       (set! used-ports (cons port used-ports)))
     mdb
     "SELECT port FROM servers;")
    (cond
     ((and port-param res)   (if (> res port-param) res port-param))
     (port-param             port-param)
     ;; ((and config-port res)  (if (> res config-port) res config-port))
     ;; (config-port            config-port)
     (else
      (let loop ((port     (get-rand-port))
		 (remtries 100))
	(if (member port used-ports)
	    (if (> remtries 0)
		(loop (get-rand-port)(- remtries 1))
		(get-rand-port))
	    port))))))

(define (tasks:server-am-i-the-server? mdb run-id)
  (let* ((all    (tasks:server-get-servers-vying-for-run-id mdb run-id))
	 (first  (if (null? all)
		     #f;; (begin (debug:print-error 0 *default-log-port* "no servers listed, should be at least one by now.") 
		       ;;      (sqlite3:finalize! mdb)
		       ;;      (exit 1))
		     (car (db:get-rows all)))))
    (if first
	(let* ((header   (db:get-header all))
	       (id       (db:get-value-by-header first header "id"))
	       (hostname (db:get-value-by-header first header "hostname"))
	       (pid      (db:get-value-by-header first header "pid"))
	       (priority (db:get-value-by-header first header "priority")))
	  ;; (debug:print 0 *default-log-port* "INFO: am-i-the-server got record " first)
	  ;; for now a basic check. add tiebreaking by priority later
	  (if (and (equal? hostname (get-host-name))
		   (equal? pid      (current-process-id)))
	      id
	      #f))
	#f)))
	     
;; Use: (db:get-value-by-header (car (db:get-rows dat)) (db:get-header dat) "fieldname")
;;  to extract info from the structure returned
;;
(define (tasks:server-get-servers-vying-for-run-id mdb run-id)
   (let* ((header (list "id" "hostname" "pid" "interface" "port" "pubport" "state" "run_id" "priority" "start_time"))
	  (selstr (string-intersperse header ","))
	  (res    '()))
    (sqlite3:for-each-row
     (lambda (a . b)
       (set! res (cons (apply vector a b) res)))
     mdb
     (conc "SELECT " selstr " FROM servers WHERE state in ('available','running','dbprep') ORDER BY start_time DESC;")
     )
    (vector header res)))

(define (tasks:get-server mdb run-id #!key (retries 10))
  (let ((res  #f)
	(best #f))
    (handle-exceptions
     exn
     (begin
       (print-call-chain (current-error-port))
       (debug:print 0 *default-log-port* "WARNING: tasks:get-server db access error.")
       (debug:print 0 *default-log-port* " message: " ((condition-property-accessor 'exn 'message) exn))
       (debug:print 0 *default-log-port* " for run " run-id)
       (print-call-chain (current-error-port))
       (if (> retries 0)
	   (begin
	     (debug:print 0 *default-log-port* " trying call to tasks:get-server again in 10 seconds")
	     (thread-sleep! 10)
	     (tasks:get-server mdb run-id retries: (- retries 0)))
	   (debug:print 0 *default-log-port* "10 tries of tasks:get-server all crashed and burned. Giving up and returning \"no server found\"")))
     (sqlite3:for-each-row
      (lambda (id interface port pubport transport pid hostname)
	(set! res (vector id interface port pubport transport pid hostname)))
      mdb
      ;; removed:
      ;; strftime('%s','now')-heartbeat < 10 AND mt_version = ?
      "SELECT id,interface,port,pubport,transport,pid,hostname FROM servers
          WHERE run_id=? AND state='running'
          ORDER BY start_time DESC LIMIT 1;" run-id) ;; (common:version-signature) run-id)
     res)))

(define (tasks:server-running-or-starting? mdb run-id)
  (let ((res #f))
    (sqlite3:for-each-row
     (lambda (id)
       (set! res id))
     mdb ;; NEEDS dbprep ADDED
     "SELECT id FROM servers WHERE run_id=? AND (state = 'running' OR (state = 'dbprep' AND  (strftime('%s','now') - start_time) < 60));" run-id)
    res))

(define (tasks:server-running? mdb run-id)
  (let ((res #f))
    (sqlite3:for-each-row
     (lambda (id)
       (set! res id))
     mdb ;; NEEDS dbprep ADDED
     "SELECT id FROM servers WHERE run_id=? AND state = 'running';" run-id)
    res))

(define (tasks:need-server run-id)
  (equal? (configf:lookup *configdat* "server" "required") "yes"))

;; 	(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 *default-log-port* "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 *default-log-port* "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 *default-log-port* "Try starting server for run-id " run-id))
	    (thread-sleep! (/ (random 2000) 1000))
	    (server:kind-run *toppath*)
	    (thread-sleep! (min delay-time 1))
            (if (not (or (server:start-attempted? *toppath*)
                         (server:read-dotserver *toppath*))) ;; no point in trying
                (loop (tasks:get-server (db:delay-if-busy tdbdat) run-id)(+ delay-time 1))
                #f))
          #f)))

(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
       (set! res (cons (vector id pid hostname interface port pubport start-time priority state mt-version last-update transport run-id) res)))
     mdb
     "SELECT id,pid,hostname,interface,port,pubport,start_time,priority,state,mt_version,strftime('%s','now')-heartbeat AS last_update,transport,run_id 
        FROM servers WHERE state NOT LIKE 'defunct%' ORDER BY start_time DESC;")
    res))

(define (tasks:get-server-by-id mdb id)
  (let ((res #f))
    (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
       (set! res (vector id pid hostname interface port pubport start-time priority state mt-version last-update transport run-id)))
     mdb
     "SELECT id,pid,hostname,interface,port,pubport,start_time,priority,state,mt_version,strftime('%s','now')-heartbeat AS last_update,transport,run_id 
        FROM servers WHERE id=?;"
     id)
    res))

(define (tasks:get-server-records mdb run-id)
  (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
       (set! res (cons (vector id pid hostname interface port pubport start-time priority state mt-version last-update transport run-id) res)))
     mdb
     "SELECT id,pid,hostname,interface,port,pubport,start_time,priority,state,mt_version,strftime('%s','now')-heartbeat AS last_update,transport,run_id 
        FROM servers WHERE run_id=? AND state NOT LIKE 'defunct%' ORDER BY start_time DESC;"
     run-id)
    (reverse res)))

;; no elegance here ...
;;
(define (tasks:kill-server hostname pid #!key (kill-switch ""))
  (server:remove-dotserver-file *toppath* ".*")
  (debug:print-info 0 *default-log-port* "Attempting to kill server process " pid " on host " hostname)
  (setenv "TARGETHOST" hostname)
  (setenv "TARGETHOST_LOGF" "server-kills.log")
  (system (conc "nbfake kill "kill-switch" "pid))

  (unsetenv "TARGETHOST_LOGF")
  (unsetenv "TARGETHOST"))
 
;; look up a server by run-id and send it a kill, also delete the record for that server
;;
(define (tasks:kill-server-run-id run-id #!key (tag "default"))
  (let* ((tdbdat  (tasks:open-db))
	 (sdat    (tasks:get-server (db:delay-if-busy tdbdat) run-id)))
    (if sdat
	(let ((hostname (vector-ref sdat 6))
	      (pid      (vector-ref sdat 5))
	      (server-id (vector-ref sdat 0)))
	  (tasks:server-set-state! (db:delay-if-busy tdbdat) server-id "killed")
	  (debug:print-info 0 *default-log-port* "Killing server " server-id " for run-id " run-id " on host " hostname " with pid " pid)
          (server:remove-dotserver-file *toppath* ".*")
	  (tasks:kill-server hostname pid)
	  (tasks:server-delete-record (db:delay-if-busy tdbdat) server-id tag) )
	(debug:print-info 0 *default-log-port* "No server found for run-id " run-id ", nothing to kill"))
    ;; (sqlite3:finalize! tdb)
    ))
    
;;======================================================================
;; M O N I T O R S
;;======================================================================

(define (tasks:remove-monitor-record mdb)
  (sqlite3:execute mdb "DELETE FROM monitors WHERE pid=? AND hostname=?;"
		   (current-process-id)

# fi
# echo "exec $prefix/bin/.\$(lsb_release -sr)/$cmd \"\$@\"" >> $target
echo "#!/bin/bash" > $target

if [[ $cmd =~ dboard ]]; then
    cat >> $target <<'EOF'

# disable if not running on homehost
if [[ -e .homehost ]]; then
  homehostname=$( host `cat .homehost` | awk '{print $NF}' | sed 's/\.$//' )
  hostname=$( hostname -f )

  if [[ ! ($homehostname == $hostname) ]]; then
    echo "ERROR: this host ($hostname) is not the homehost ($homehostname) for this megatest run area.  Cannot start dashboard."
    echo "       Please log into homehost before launching dashboard."
    exit 1
  fi
fi

# check that $DISPLAY is set
if [[ -z $DISPLAY ]]; then
   echo 'ERROR: $DISPLAY environment variable is not set; megatest dashboard requires X display address to be set in $DISPLAY.'
   exit 1
fi