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;;======================================================================
;; Copyright 2006-2013, 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.
;;======================================================================
(use json format) ;; RADT => purpose of json format??
(declare (unit rmt))
(declare (uses api))
(declare (uses tdb))
(declare (uses http-transport))
;;(declare (uses nmsg-transport))
;;
;; THESE ARE ALL CALLED ON THE CLIENT SIDE!!!
;;
;; ;; For debugging add the following to ~/.megatestrc
;;
;; (require-library trace)
;; (import trace)
;; (trace
;; rmt:send-receive
;; api:execute-requests
;; )
;;
(define (rmt:write-frequency-over-limit? cmd run-id)
(and (not (member cmd api:read-only-queries))
(let* ((tmprec (hash-table-ref/default *write-frequency* run-id #f))
(record (if tmprec tmprec
(let ((v (vector (current-seconds) 0)))
(hash-table-set! *write-frequency* run-id v)
v)))
(count (+ 1 (vector-ref record 1)))
(start (vector-ref record 0))
(queries-per-second (/ (* count 1.0)
(max (- (current-seconds) start) 1))))
(vector-set! record 1 count)
(if (and (> count 10)
(> queries-per-second 10))
(begin
(debug:print-info 1 *default-log-port* "db write rate too high, starting a server, count=" count " start=" start " run-id=" run-id " queries-per-second=" queries-per-second)
#t)
#f))))
(let ((cinfo (hash-table-ref/default *runremote* run-id #f)))
(if cinfo
cinfo
;; NB// can cache the answer for server running for 10 seconds ...
;; ;; (and (not (rmt:write-frequency-over-limit? cmd run-id))
;; clean out old connections
;; (mutex-lock! *db-multi-sync-mutex*)
(let ((expire-time (- (current-seconds) (server:get-timeout) 10))) ;; don't forget the 10 second margin
(for-each
(lambda (run-id)
(let ((connection (hash-table-ref/default *runremote* run-id #f)))
(if (and (vector? connection)
(< (http-transport:server-dat-get-last-access connection) expire-time))
(begin
(debug:print-info 0 *default-log-port* "Discarding connection to server for run-id " run-id ", too long between accesses")
;; bb- disabling nanomsg
;; SHOULD CLOSE THE CONNECTION HERE
;; (case *transport-type*
;; ((nmsg)(nn-close (http-transport:server-dat-get-socket
;; (hash-table-ref *runremote* run-id)))))
(hash-table-delete! *runremote* run-id)))))
(hash-table-keys *runremote*)))
;; (mutex-unlock! *db-multi-sync-mutex*)
;; (mutex-lock! *send-receive-mutex*)
(let* ((run-id (if rid rid 0))
(connection-info (rmt:get-connection-info run-id)))
;; the nmsg method does the encoding under the hood (the http method should be changed to do this also)
(if connection-info
;; use the server if have connection info
(let* ((dat (case *transport-type*
((http)(condition-case
(http-transport:client-api-send-receive run-id connection-info cmd params)
((commfail)(vector #f "communications fail"))
((exn)(vector #f "other fail"))))
;; ((nmsg)(condition-case
;; (nmsg-transport:client-api-send-receive run-id connection-info cmd params)
;; ((timeout)(vector #f "timeout talking to server"))))
(else (exit))))
(success (if (vector? dat) (vector-ref dat 0) #f))
(res (if (vector? dat) (vector-ref dat 1) #f)))
(if (vector? connection-info)(http-transport:server-dat-update-last-access connection-info))
(if success
(begin
;; (mutex-unlock! *send-receive-mutex*)
(case *transport-type*
((http) res) ;; (db:string->obj res))
;; ((nmsg) res)
)) ;; (vector-ref res 1)))
(begin ;; let ((new-connection-info (client:setup run-id)))
(debug:print 0 *default-log-port* "WARNING: Communication failed, trying call to rmt:send-receive again.")
;; (case *transport-type*
;; ((nmsg)(nn-close (http-transport:server-dat-get-socket connection-info))))
(hash-table-delete! *runremote* run-id) ;; don't keep using the same connection
;; NOTE: killing server causes this process to block forever. No idea why. Dec 2.
;; (if (eq? (modulo attemptnum 5) 0)
;; (tasks:kill-server-run-id run-id tag: "api-send-receive-failed"))
;; (mutex-unlock! *send-receive-mutex*) ;; close the mutex here to allow other threads access to communications
(tasks:start-and-wait-for-server (tasks:open-db) run-id 15)
;; (nmsg-transport:client-api-send-receive run-id connection-info cmd param remtries: (- remtries 1))))))
;; no longer killing the server in http-transport:client-api-send-receive
;; may kill it here but what are the criteria?
;; start with three calls then kill server
;; (if (eq? attemptnum 3)(tasks:kill-server-run-id run-id))
;; (thread-sleep! 2)
(rmt:send-receive cmd run-id params attemptnum: (+ attemptnum 1)))))
;; no connection info? try to start a server, or access locally if no
;; server and the query is read-only
;;
;; Note: The tasks db was checked for a server in starting mode in the rmt:get-connection-info call
;;
(if (and (< attemptnum 15)
(member cmd api:write-queries))
(let ((faststart (configf:lookup *configdat* "server" "faststart")))
(hash-table-delete! *runremote* run-id)
;; (mutex-unlock! *send-receive-mutex*)
(if (and faststart (equal? faststart "no"))
(begin
(tasks:start-and-wait-for-server (db:delay-if-busy (tasks:open-db)) run-id 10)
(thread-sleep! (random 5)) ;; give some time to settle and minimize collison?
(rmt:send-receive cmd rid params attemptnum: (+ attemptnum 1)))
(let ((start-time (current-milliseconds))
(max-query (string->number (or (configf:lookup *configdat* "server" "server-query-threshold")
"300")))
(newres (rmt:open-qry-close-locally cmd run-id params)))
(let ((delta (- (current-milliseconds) start-time)))
(if (> delta max-query)
(begin
(debug:print-info 0 *default-log-port* "Starting server as query time " delta " is over the limit of " max-query)
(server:kind-run run-id)))
;; return the result!
newres)
)))
(begin
;; (debug:print-error 0 *default-log-port* "Communication failed!")
;; (mutex-unlock! *send-receive-mutex*)
;; (exit)
(rmt:open-qry-close-locally cmd run-id params)
)))))
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|
;;======================================================================
;; Copyright 2006-2013, 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.
;;======================================================================
(use format typed-records) ;; RADT => purpose of json format??
(declare (unit rmt))
(declare (uses api))
(declare (uses tdb))
(declare (uses http-transport))
;;(declare (uses nmsg-transport))
(include "common_records.scm")
;;
;; THESE ARE ALL CALLED ON THE CLIENT SIDE!!!
;;
;; generate entries for ~/.megatestrc with the following
;;
;; grep define ../rmt.scm | grep rmt: |perl -pi -e 's/\(define\s+\((\S+)\W.*$/\1/'|sort -u
(defstruct remote
(hh-dat (common:get-homehost)) ;; homehost record ( addr . hhflag )
(server-url (if *toppath* (server:read-dotserver *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
;;======================================================================
;; S U P P O R T F U N C T I O N S
;;======================================================================
;; if a server is either running or in the process of starting call client:setup
;; else return #f to let the calling proc know that there is no server available
;;
(define (rmt:get-connection-info run-id)
(let ((cinfo (remote-conndat *runremote*)))
(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
;; do all the prep locked under the rmt-mutex
(mutex-lock! *rmt-mutex*)
;; 1. check if server is started IFF cmd is a write OR if we are not on the homehost, store in *runremote*
;; 2. check the age of the connections. refresh the connection if it is older than timeout-20 seconds.
;; 3. do the query, if on homehost use local access
;;
(let* ((start-time (current-seconds))) ;; snapshot time so all use cases get same value
(cond
;; give up if more than 15 attempts
((> attemptnum 15)
(debug:print 0 *default-log-port* "ERROR: 15 tries to start/connect to server. Giving up.")
(exit 1))
;; reset the connection if it has been unused too long
((and *runremote*
(remote-conndat *runremote*)
(let ((expire-time (- start-time (remote-server-timeout *runremote*))))
(< (http-transport:server-dat-get-last-access (remote-conndat *runremote*)) expire-time)))
(debug:print-info 12 *default-log-port* "rmt:send-receive, case 8")
(remote-conndat-set! *runremote* #f)
(mutex-unlock! *rmt-mutex*)
(rmt:send-receive cmd rid params attemptnum: attemptnum))
;; ensure we have a record for our connection for given area
((not *runremote*)
(set! *runremote* (make-remote))
(mutex-unlock! *rmt-mutex*)
(debug:print-info 12 *default-log-port* "rmt:send-receive, case 1")
(rmt:send-receive cmd rid params attemptnum: attemptnum))
;; ensure we have a homehost record
((not (pair? (remote-hh-dat *runremote*))) ;; have a homehost record?
(thread-sleep! 0.1) ;; since we shouldn't get here, delay a little
(remote-hh-dat-set! *runremote* (common:get-homehost))
(mutex-unlock! *rmt-mutex*)
(debug:print-info 12 *default-log-port* "rmt:send-receive, case 2")
(rmt:send-receive cmd rid params attemptnum: attemptnum))
;; on homehost and this is a read
((and (cdr (remote-hh-dat *runremote*)) ;; on homehost
(member cmd api:read-only-queries)) ;; this is a read
(mutex-unlock! *rmt-mutex*)
(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
((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))
;; 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))
;; no server contact made and this is a write, passively start a server
((and (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 ((serverconn (server:read-dotserver *toppath*))) ;; (server:check-if-running *toppath*))) ;; Do NOT want to run server:check-if-running - very expensive to do for every write call
(if serverconn
(remote-server-url-set! *runremote* serverconn) ;; the string can be consumed by the client setup if needed
(if (not (server:start-attempted? *toppath*))
(server:kind-run *toppath*))))
(if (cdr (remote-hh-dat *runremote*)) ;; we are on the homehost, just do the call
(begin
(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*))) ;; are we 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 0)) ;; calls client:setup which calls client:setup-http
(rmt:send-receive cmd rid params attemptnum: attemptnum))
;; 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))
;; not on homehost, do server query
(else
(mutex-unlock! *rmt-mutex*)
(debug:print-info 12 *default-log-port* "rmt:send-receive, case 9")
(let* ((conninfo (remote-conndat *runremote*))
(dat (case (remote-transport *runremote*)
((http) (condition-case ;; handling here has caused a lot of problems. However it is needed to deal with attemtped communication to servers that have gone away
(http-transport:client-api-send-receive 0 conninfo cmd params)
((commfail)(vector #f "communications fail"))
((exn)(vector #f "other fail" (print-call-chain)))))
(else
(debug:print 0 *default-log-port* "ERROR: transport " (remote-transport *runremote*) " not supported")
(exit))))
(success (if (vector? dat) (vector-ref dat 0) #f))
(res (if (vector? dat) (vector-ref dat 1) #f)))
(if (vector? conninfo)(http-transport:server-dat-update-last-access conninfo)) ;; refresh access time
(debug:print-info 12 *default-log-port* "rmt:send-receive, case 9. conninfo=" conninfo " dat=" dat)
(if success
(case (remote-transport *runremote*)
((http) res)
(else
(debug:print 0 *default-log-port* "ERROR: transport " (remote-transport *runremote*) " is unknown")
(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")
(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
(debug:print 0 *default-log-port* "WARNING: stats collection failed in update-db-stats")
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(cons newmax-cmd currmax)
(cons 'none 0))
(loop (car tal)(cdr tal) newmax-cmd currmax)))))))
(mutex-unlock! *db-stats-mutex*)
res))
(define (rmt:open-qry-close-locally cmd run-id params #!key (remretries 5))
(let* ((dbstruct-local (db:open-local-db-handle))
(db-file-path (db:dbfile-path 0))
;; (read-only (not (file-read-access? db-file-path)))
(start (current-milliseconds))
(resdat (api:execute-requests dbstruct-local (vector (symbol->string cmd) params)))
(success (vector-ref resdat 0))
(res (vector-ref resdat 1))
(duration (- (current-milliseconds) start)))
(if (not success)
(if (> remretries 0)
(begin
(debug:print-error 0 *default-log-port* "local query failed. Trying again.")
(thread-sleep! (/ (random 5000) 1000)) ;; some random delay
(rmt:open-qry-close-locally cmd run-id params remretries: (- remretries 1)))
(begin
(debug:print-error 0 *default-log-port* "too many retries in rmt:open-qry-close-locally, giving up")
#f))
(begin
;; (rmt:update-db-stats run-id cmd params duration)
;; mark this run as dirty if this was a write
(if (not (member cmd api:read-only-queries))
(let ((start-time (current-seconds)))
(mutex-lock! *db-multi-sync-mutex*)
;; (if (not (hash-table-ref/default *db-local-sync* run-id #f))
;; just set it every time. Is a write more expensive than a read and does it matter?
(hash-table-set! *db-local-sync* (or run-id 0) start-time) ;; the oldest "write"
(mutex-unlock! *db-multi-sync-mutex*)))
res))))
;; (jparams (db:obj->string params)) ;; (rmt:dat->json-str params))
;; ((commfail) (vector #f "communications fail")))))
;; (db:string->obj (vector-ref dat 1))
;; (begin
;; (debug:print-error 0 *default-log-port* "rmt:send-receive-no-auto-client-setup failed, attempting to continue. Got " dat)
;; dat))))
;; Wrap json library for strings (why the ports crap in the first place?)
(define (rmt:dat->json-str dat)
(with-output-to-string
(lambda ()
(json-write dat))))
(define (rmt:json-str->dat json-str)
(with-input-from-string json-str
(lambda ()
(json-read))))
;;======================================================================
;;
;; A C T U A L A P I C A L L S
;;
;;======================================================================
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(cons newmax-cmd currmax)
(cons 'none 0))
(loop (car tal)(cdr tal) newmax-cmd currmax)))))))
(mutex-unlock! *db-stats-mutex*)
res))
(define (rmt:open-qry-close-locally cmd run-id params #!key (remretries 5))
(let* ((qry-is-write (not (member cmd api:read-only-queries)))
(db-file-path (db:dbfile-path)) ;; 0))
(dbstruct-local (db:setup)) ;; make-dbr:dbstruct path: dbdir local: #t)))
(read-only (not (file-write-access? db-file-path)))
(start (current-milliseconds))
(resdat (if (not (and read-only qry-is-write))
(api:execute-requests dbstruct-local (vector (symbol->string cmd) params))
(vector #t '())))
(success (vector-ref resdat 0))
(res (vector-ref resdat 1))
(duration (- (current-milliseconds) start)))
(if (and read-only qry-is-write)
(debug:print 0 *default-log-port* "ERROR: attempt to write to read-only database ignored. cmd=" cmd))
(if (not success)
(if (> remretries 0)
(begin
(debug:print-error 0 *default-log-port* "local query failed. Trying again.")
(thread-sleep! (/ (random 5000) 1000)) ;; some random delay
(rmt:open-qry-close-locally cmd run-id params remretries: (- remretries 1)))
(begin
(debug:print-error 0 *default-log-port* "too many retries in rmt:open-qry-close-locally, giving up")
#f))
(begin
;; (rmt:update-db-stats run-id cmd params duration)
;; mark this run as dirty if this was a write, the watchdog is responsible for syncing it
(if qry-is-write
(let ((start-time (current-seconds)))
(mutex-lock! *db-multi-sync-mutex*)
(set! *db-last-write* start-time) ;; the oldest "write"
(mutex-unlock! *db-multi-sync-mutex*)))))
res))
(define (rmt:send-receive-no-auto-client-setup connection-info cmd run-id params)
(let* ((run-id (if run-id run-id 0))
(res (handle-exceptions
exn
#f
(http-transport:client-api-send-receive run-id connection-info cmd params))))
(if (and res (vector-ref res 0))
(vector-ref res 1) ;;; YES!! THIS IS CORRECT!! CHANGE IT HERE, THEN CHANGE rmt:send-receive ALSO!!!
#f)))
;; ;; Wrap json library for strings (why the ports crap in the first place?)
;; (define (rmt:dat->json-str dat)
;; (with-output-to-string
;; (lambda ()
;; (json-write dat))))
;;
;; (define (rmt:json-str->dat json-str)
;; (with-input-from-string json-str
;; (lambda ()
;; (json-read))))
;;======================================================================
;;
;; A C T U A L A P I C A L L S
;;
;;======================================================================
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(rmt:send-receive 'start-server 0 (list run-id)))
;;======================================================================
;; M I S C
;;======================================================================
(define (rmt:login run-id)
(rmt:send-receive 'login run-id (list *toppath* megatest-version run-id *my-client-signature*)))
;; This login does no retries under the hood - it acts a bit like a ping.
;; Deprecated for nmsg-transport.
;;
(define (rmt:login-no-auto-client-setup connection-info run-id)
(case *transport-type*
((http)(rmt:send-receive-no-auto-client-setup connection-info 'login run-id (list *toppath* megatest-version run-id *my-client-signature*)))
;;((nmsg)(nmsg-transport:client-api-send-receive run-id connection-info 'login (list *toppath* megatest-version run-id *my-client-signature*)))
))
;; hand off a call to one of the db:queries statements
;; added run-id to make looking up the correct db possible
;;
(define (rmt:general-call stmtname run-id . params)
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(rmt:send-receive 'start-server 0 (list run-id)))
;;======================================================================
;; M I S C
;;======================================================================
(define (rmt:login run-id)
(rmt:send-receive 'login run-id (list *toppath* megatest-version *my-client-signature*)))
;; This login does no retries under the hood - it acts a bit like a ping.
;; Deprecated for nmsg-transport.
;;
(define (rmt:login-no-auto-client-setup connection-info)
(case *transport-type* ;; run-id of 0 is just a placeholder
((http)(rmt:send-receive-no-auto-client-setup connection-info 'login 0 (list *toppath* megatest-version *my-client-signature*)))
;;((nmsg)(nmsg-transport:client-api-send-receive run-id connection-info 'login (list *toppath* megatest-version run-id *my-client-signature*)))
))
;; hand off a call to one of the db:queries statements
;; added run-id to make looking up the correct db possible
;;
(define (rmt:general-call stmtname run-id . params)
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(rmt:send-receive 'get-count-tests-running-for-testname run-id (list run-id testname)))
(define (rmt:get-count-tests-running-in-jobgroup run-id jobgroup)
(rmt:send-receive 'get-count-tests-running-in-jobgroup run-id (list run-id jobgroup)))
;; state and status are extra hints not usually used in the calculation
;;
(define (rmt:roll-up-pass-fail-counts run-id test-name item-path state status)
(rmt:send-receive 'roll-up-pass-fail-counts run-id (list run-id test-name item-path state status)))
(define (rmt:update-pass-fail-counts run-id test-name)
(rmt:general-call 'update-pass-fail-counts run-id test-name test-name test-name))
(define (rmt:top-test-set-per-pf-counts run-id test-name)
(rmt:send-receive 'top-test-set-per-pf-counts run-id (list run-id test-name)))
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(rmt:send-receive 'get-count-tests-running-for-testname run-id (list run-id testname)))
(define (rmt:get-count-tests-running-in-jobgroup run-id jobgroup)
(rmt:send-receive 'get-count-tests-running-in-jobgroup run-id (list run-id jobgroup)))
;; state and status are extra hints not usually used in the calculation
;;
(define (rmt:roll-up-pass-fail-counts run-id test-name item-path state status comment)
(rmt:send-receive 'roll-up-pass-fail-counts run-id (list run-id test-name item-path state status comment)))
(define (rmt:update-pass-fail-counts run-id test-name)
(rmt:general-call 'update-pass-fail-counts run-id test-name test-name test-name))
(define (rmt:top-test-set-per-pf-counts run-id test-name)
(rmt:send-receive 'top-test-set-per-pf-counts run-id (list run-id test-name)))
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