;;======================================================================
;; Copyright 2017, Matthew Welland.
;;
;; This file is part of Megatest.
;;
;; Megatest is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;;
;; Megatest is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with Megatest. If not, see <http://www.gnu.org/licenses/>.
;;======================================================================
(use srfi-18 posix hostinfo)
(declare (unit dbfile))
(declare (uses debugprint))
(declare (uses commonmod))
(module dbfile
*
(import scheme
chicken
data-structures
extras
matchable
(prefix sqlite3 sqlite3:)
posix posix-extras typed-records
srfi-18
srfi-1
srfi-69
stack
files
ports
hostinfo
commonmod
debugprint
)
;; parameters
;;
(define dbfile:testsuite-name (make-parameter #f))
(define keep-age-param (make-parameter 10)) ;; qif file age, if over move to attic
(define num-run-dbs (make-parameter 10)) ;; number of db's in .mtdb
(define dbfile:sync-method (make-parameter 'attach)) ;; 'attach or 'original
(define dbfile:cache-method (make-parameter 'cachedb)) ;; 'direct
(define dbcache-mode (make-parameter 'tmp)) ;; 'cachedb, 'tmp (changes what open cachedb routine does)
;; moved from tcp-transportmod so that it can be used in launch.scm
(define tt-server-profile-string (make-parameter ""))
;; 'original - use old condition code
;; 'suicide-mode - create mtrah/stop-the-train with info on what went wrong
;; else use no condition code (should be production mode)
;;
(define no-condition-db-with-db (make-parameter 'suicide-mode))
;;======================================================================
;; R E C O R D S
;;======================================================================
;; a single Megatest area with it's multiple dbs is
;; managed in a dbstruct
;;
(defstruct dbr:dbstruct
(areapath #f)
(homehost #f)
(tmppath #f)
(read-only #f)
(subdbs (make-hash-table))
;;
;; for the cachedb approach (see dbmod.scm)
;; this is one db per server
(cachedb #f) ;; handle for the in memory copy
(dbfile #f) ;; path to the db file on disk
(dbfname #f) ;; short name of db file on disk (used to validate accessing correct db)
(ondiskdb #f) ;; handle for the on-disk file
(dbtmpname #f) ;; path to db file in /tmp (non-imem method)
(dbdat #f) ;; create a dbdat for the downstream calls such as db:with-db
(last-update 0)
(sync-proc #f)
)
;; NOTE: Need one dbr:subdb per main.db, 1.db ...
;;
(defstruct dbr:subdb
(dbname #f) ;; .mtdb/1.db
(mtdbfile #f) ;; mtrah/.mtdb/1.db
(mtdbdat #f) ;; only need one of these for syncing
;; (dbdats (make-hash-table)) ;; id => dbdat
(tmpdbfile #f) ;; /tmp/.../.mtdb/1.db
;; (refndbfile #f) ;; /tmp/.../.mtdb/1.db_ref
(dbstack (make-stack)) ;; stack for tmp dbr:dbdat,
(homehost #f) ;; not used yet
(on-homehost #f) ;; not used yet
(read-only #f)
(last-sync 0)
(last-write (current-seconds))
) ;; goal is to converge on one struct for an area but for now it is too confusing
;; need to keep dbhandles and cached statements together
(defstruct dbr:dbdat
(dbfile #f)
(dbh #f)
(stmt-cache (make-hash-table))
(read-only #f)
(birth-sec (current-seconds)))
;; used in simple-get-runs (thanks Brandon!)
(define-record simple-run target id runname state status owner event_time)
(define-record-printer (simple-run x out)
(fprintf out "#,(simple-run ~S ~S ~S ~S)"
(simple-run-target x) (simple-run-id x) (simple-run-runname x) (time->string (seconds->local-time (simple-run-event_time x) ))))
;; args is hash table of string to value
;;
(define (get-purpose args)
(let* ((get-arg (lambda (key)
(hash-table-ref/default args key #f)))
(get-switch (lambda keys
(fold
(lambda (key res)
(if (hash-table-ref/default args key #f)
(or key res)
res))
#f
keys)))
(action (get-switch "-server" "-execute" "-run" "-rerun")))
(cond
(action
(substring action 1 (string-length action)))
(else
"nopurpose"))))
;; megatest process tracking
(defstruct procinf
(start (current-seconds))
(host (get-host-name)) ;; why is this not being recognised?
(pid (current-process-id))
(port #f)
(cwd (current-directory))
(load #f)
(purpose #f) ;; get-purpose needed to be run in megatest.scm
(dbname #f)
(mtbin (car (argv)))
(mtversion #f)
(status "running")
)
(define *procinf* (make-procinf))
(define *dbstruct-dbs* #f)
(define *db-open-mutex* (make-mutex))
(define *db-access-mutex* (make-mutex)) ;; used in common.scm
(define *no-sync-db* #f)
(define *db-sync-in-progress* #f)
(define *db-with-db-mutex* (make-mutex))
(define *max-api-process-requests* 0)
(define *api-process-request-count* 0)
(define *db-write-access* #t)
(define *db-last-sync* 0) ;; last time the sync to megatest.db happened
(define *db-multi-sync-mutex* (make-mutex)) ;; protect access to *db-sync-in-progress*, *db-last-sync*
(define *db-last-access* (current-seconds))
(define *db-transaction-mutex* (make-mutex))
(define (db:generic-error-printout exn . message)
(print-call-chain (current-error-port))
(apply dbfile:print-err message)
(dbfile:print-err
", error: " ((condition-property-accessor 'exn 'message) exn)
", arguments: " ((condition-property-accessor 'exn 'arguments) exn)
", location: " ((condition-property-accessor 'exn 'location) exn)
))
(define (dbfile:run-id->key run-id)
(or run-id 'main))
(define (db:safely-close-sqlite3-db db stmt-cache #!key (try-num 3))
(if (<= try-num 0)
#f
(handle-exceptions
exn
(begin
(print "Attempt to safely close sqlite3 db failed. Trying again. exn=" exn)
(thread-sleep! 3)
(sqlite3:interrupt! db)
(db:safely-close-sqlite3-db db stmt-cache try-num: (- try-num 1)))
(if (sqlite3:database? db)
(let* ((stmts (and stmt-cache (hash-table-ref/default stmt-cache db #f))))
(if stmts (map sqlite3:finalize! (hash-table-values stmts)))
(sqlite3:finalize! db)
#t)
(begin
(dbfile:print-err "db:safely-close-sqlite3-db: " db " is not an sqlite3 db")
#f
)
))))
;; close all opened run-id dbs
(define (db:close-all dbstruct)
(if (dbr:dbstruct? dbstruct)
;; (handle-exceptions
;; exn
;; (begin
;; (debug:print 0 *default-log-port* "WARNING: Finalizing failed, " ((condition-property-accessor 'exn 'message) exn) ", note - exn=" exn)
;; (print-call-chain *default-log-port*))
;; (db:sync-touched dbstruct 0 force-sync: #t) ;; NO. Do not do this here. Instead we rely on a server to be started when there are writes, even if the server itself is not going to be used as a server.
(let* ((subdbs (hash-table-values (dbr:dbstruct-subdbs dbstruct))))
(for-each
(lambda (subdb)
(let* ((tdbs (stack->list (dbr:subdb-dbstack subdb)))
(mtdbdat (dbr:dbdat-dbh (dbr:subdb-mtdbdat subdb)))
#;(rdb (dbr:dbdat-dbh (dbr:subdb-refndb subdb))))
(map (lambda (dbdat)
(let* ((stmt-cache (dbr:dbdat-stmt-cache dbdat))
(dbh (dbr:dbdat-dbh dbdat)))
(db:safely-close-sqlite3-db dbh stmt-cache)))
tdbs)
(db:safely-close-sqlite3-db mtdbdat (dbr:dbdat-stmt-cache (dbr:subdb-mtdbdat subdb)))
;; (if (sqlite3:database? mdb) (sqlite3:finalize! mdb))
#;(db:safely-close-sqlite3-db rdb #f))) ;; stmt-cache))))) ;; (if (sqlite3:database? rdb) (sqlite3:finalize! rdb))))))
subdbs)
#t
)
#f
)
)
(define (dbfile:make-tmpdir-name areapath tmpadj)
(let* ((dname (conc "/tmp/"(current-user-name)"/" (string-translate areapath "/" ".") tmpadj)))
(unless (directory-exists? dname)
(create-directory dname #t))
dname))
(define (dbfile:run-id->path apath run-id)
(conc apath"/"(dbfile:run-id->dbname run-id)))
(define (db:dbname->path apath dbname)
(conc apath"/"dbname))
(define (dbfile:run-id->dbnum run-id)
(cond
((number? run-id)
(modulo run-id (num-run-dbs)))
((not run-id) "main") ;; 0 or main? No, not 0.
(else
(assert #f "FATAL: run-id is required to be a number or #f"))))
;; just the filename
(define (dbfile:run-id->dbfname run-id)
(conc (dbfile:run-id->dbnum run-id)".db"))
;; the path in MTRAH with the filename
(define (dbfile:run-id->dbname run-id)
(conc ".mtdb/"(dbfile:run-id->dbfname run-id)))
;; Make the dbstruct, setup up auxillary db's and call for main db at least once
;;
;; called in http-transport and replicated in rmt.scm for *local* access.
;;
(define (dbfile:setup do-sync areapath tmppath)
(cond
(*dbstruct-dbs*
(dbfile:print-err "WARNING: dbfile:setup called when *dbstruct-dbs* is already initialized")
*dbstruct-dbs*) ;; TODO: when multiple areas are supported, this optimization will be a hazard
(else
(let* ((dbstruct (make-dbr:dbstruct areapath: areapath tmppath: tmppath)))
(set! *dbstruct-dbs* dbstruct)
dbstruct))))
(define (dbfile:get-subdb dbstruct run-id)
(let* ((dbfname (dbfile:run-id->dbname run-id)))
(hash-table-ref/default (dbr:dbstruct-subdbs dbstruct) dbfname #f)))
(define (dbfile:set-subdb dbstruct run-id subdb)
(hash-table-set! (dbr:dbstruct-subdbs dbstruct) (dbfile:run-id->dbname run-id) subdb))
;; (define *dbfile:num-handles-in-use* 0)
;; Get/open a database.
;;
;; NOTE: most usage should call dbfile:open-db to get a dbdat
;;
;; if run-id => get run specific db
;; if #f => get main db
;; if run-id is a string treat it as a filename - DON'T use this - we'll get rid of it.
;; if db already open - return cachedb
;; if db not open, open cachedb, rundb and sync then return cachedb
;; inuse gets set automatically for rundb's
;;
(define (dbfile:get-dbdat dbstruct run-id)
(let* ((subdb (dbfile:get-subdb dbstruct run-id)))
(if (stack-empty? (dbr:subdb-dbstack subdb))
#f
(begin
(stack-pop! (dbr:subdb-dbstack subdb))))))
;; return a previously opened db handle to the stack of available handles
(define (dbfile:add-dbdat dbstruct run-id dbdat)
(let* ((subdb (dbfile:get-subdb dbstruct run-id))
(dbstk (dbr:subdb-dbstack subdb))
(count (stack-count dbstk)))
(if (> count 15)
(dbfile:print-err "WARNING: stack for "run-id".db is "count"."))
(stack-push! dbstk dbdat)
dbdat))
;; set up a subdb
;;
(define (dbfile:init-subdb dbstruct run-id init-proc)
(let* ((dbname (dbfile:run-id->dbname run-id))
(areapath (dbr:dbstruct-areapath dbstruct))
(tmppath (dbr:dbstruct-tmppath dbstruct))
(mtdbpath (dbfile:run-id->path areapath run-id))
(tmpdbpath (dbfile:run-id->path tmppath run-id))
(mtdbdat (dbfile:open-sqlite3-db mtdbpath init-proc sync-mode: 0 journal-mode: #f)) ;; "WAL"))
(newsubdb (make-dbr:subdb dbname: dbname
mtdbfile: mtdbpath
tmpdbfile: tmpdbpath
mtdbdat: mtdbdat)))
(dbfile:set-subdb dbstruct run-id newsubdb)
newsubdb)) ;; return the new subdb - but shouldn't really use it
;; returns dbdat with dbh and dbfilepath
;;
;; NOTE: the handle is on /tmp db file!
;;
;; 1. if needed setup the subdb for the given run-id
;; 2. if there is no existing db handle in the stack
;; create a new handle and return it (do NOT add
;; it to the stack).
;;
(define (dbfile:open-db dbstruct run-id init-proc)
(let* ((subdb (dbfile:get-subdb dbstruct run-id)))
(if (not subdb) ;; not yet defined
(begin
(dbfile:init-subdb dbstruct run-id init-proc)
(dbfile:open-db dbstruct run-id init-proc))
(let* ((dbdat (dbfile:get-dbdat dbstruct run-id)))
(if dbdat
dbdat
(let* ((tmppath (dbr:dbstruct-tmppath dbstruct))
(tmpdbpath (dbfile:run-id->path tmppath run-id))
(dbdat (dbfile:open-sqlite3-db tmpdbpath init-proc sync-mode: 0 journal-mode: "WAL")))
;; the following line short-circuits the "one db handle per thread" model
;;
;; (dbfile:add-dbdat dbstruct run-id dbdat)
;;
dbdat))))))
;; COMBINE dbfile:open-sqlite-db and dbfile:lock-create-open
;;
;; this stuff is for initial debugging, please remove it when
;; this code stabilizes
(define *dbopens* (make-hash-table))
(define (dbfile:inc-db-open dbfile)
(let* ((curr-opens-count (+ (hash-table-ref/default *dbopens* dbfile 0) 1)))
(if (and (> curr-opens-count 1) ;; this should NOT be happening
(common:low-noise-print 15 "db-opens"))
(dbfile:print-err "INFO: db "dbfile" has been opened "curr-opens-count" times!"))
(hash-table-set! *dbopens* dbfile curr-opens-count)
curr-opens-count))
;; Open the classic megatest.db file (defaults to open in toppath)
;;
;; NOTE: returns a dbdat not a dbstruct!
;;
(define (dbfile:open-sqlite3-db dbpath init-proc #!key (sync-mode 0)(journal-mode #f))
(let* ((dbexists (file-exists? dbpath))
(write-access (file-write-access? dbpath))
(db (dbfile:cautious-open-database dbpath init-proc sync-mode journal-mode)))
(dbfile:inc-db-open dbpath)
;; (init-proc db)
(make-dbr:dbdat dbfile: dbpath dbh: db read-only: (not write-access))))
(define (dbfile:print-and-exit . params)
(with-output-to-port
(current-error-port)
(lambda ()
(apply print params)))
(exit 1))
(define (dbfile:print-err . params)
(with-output-to-port
(current-error-port)
(lambda ()
(apply print params))))
(define (dbfile:cautious-open-database fname init-proc sync-mode journal-mode #!optional (tries-left 500))
(let* ((busy-file (conc fname "-journal"))
(delay-time (* (- 51 tries-left) 1.1))
(write-access (file-write-access? fname))
(dir-access (file-write-access? (pathname-directory fname)))
(retry (lambda ()
(thread-sleep! delay-time)
(if (> tries-left 0)
(dbfile:cautious-open-database fname init-proc
sync-mode journal-mode
(- tries-left 1))))))
(assert (>= tries-left 0) (conc "FATAL: too many attempts in dbfile:cautious-open-database of "fname", giving up."))
(if (and (file-write-access? fname)
(file-exists? busy-file))
(begin
(if (common:low-noise-print 120 busy-file)
(dbfile:print-err "INFO: dbfile:cautious-open-database: journal file "
busy-file" exists, trying again in few seconds."))
(thread-sleep! 1)
(if (eq? tries-left 2)
(begin
(dbfile:print-err "INFO: forcing journal rollup "busy-file)
(dbfile:brute-force-salvage-db fname)))
(dbfile:cautious-open-database fname init-proc sync-mode journal-mode (- tries-left 1)))
(let* ((result (condition-case
(if dir-access
(dbfile:with-simple-file-lock
(conc fname ".lock")
(lambda ()
(let* ((db-exists (file-exists? fname))
(db (sqlite3:open-database fname))) ;; creates an empty db if it did not already exist.
(sqlite3:set-busy-handler! db (sqlite3:make-busy-timeout 30000))
(if sync-mode
(sqlite3:execute db (conc "PRAGMA synchronous = "sync-mode";")))
(if journal-mode
(sqlite3:execute db (conc "PRAGMA journal_mode = "journal-mode";")))
(if (and init-proc (not db-exists))
(init-proc db))
db)))
(begin
(if (file-exists? fname )
(let ((db (sqlite3:open-database fname)))
;; pragmas synchronous not needed because this db is used read-only
;; (sqlite3:execute db (conc "PRAGMA synchronous = "mode";")
(sqlite3:set-busy-handler! db (sqlite3:make-busy-timeout 30000)) ;; read-only but still need timeout
db )
(print "file doesn't exist: " fname))))
(exn (io-error)
(dbfile:print-err exn "ERROR: i/o error with " fname ". Check permissions, disk space etc. and try again.")
(retry))
(exn (corrupt)
(dbfile:print-err exn "ERROR: database " fname " is corrupt. Repair it to proceed.")
(retry))
(exn (busy)
(dbfile:print-err exn "ERROR: database " fname
" is locked. Try copying to another location, remove original and copy back.")
(retry))
(exn (permission)(dbfile:print-err exn "ERROR: database " fname " has some permissions problem.")
(retry))
(exn ()
(dbfile:print-err exn "ERROR: Unknown error with database " fname " message: "
((condition-property-accessor 'exn 'message) exn))
(retry)))))
result))))
(define (dbfile:brute-force-salvage-db fname)
(let* ((backupfname (conc fname"-"(current-process-id)".bak"))
(cmd (conc "cp "fname" "backupfname";mv "fname" "(conc fname ".delme;")
"cp "backupfname" "fname)))
(dbfile:print-err "WARNING: attempting recovery of file "fname" by running commands:\n"
" "cmd)
(system cmd)))
;; opens and returns handle and nothing else
;;
;; NOTE: this is already protected by mutex *no-sync-db-mutex*
;;
(define (dbfile:raw-open-no-sync-db dbpath)
(if (not (file-exists? dbpath))
(create-directory dbpath #t))
(debug:print-info 0 *default-log-port* "Opening "dbpath"/no-sync.db")
(let* ((dbname (conc dbpath "/no-sync.db"))
(db-exists (file-exists? dbname))
(init-proc (lambda (db)
(sqlite3:with-transaction
db
(lambda ()
;; I have been having trouble with init of no-sync.db so
;; doing the init in a transaction every time (no gating
;; on file existance.
(for-each
(lambda (stmt)
(sqlite3:execute db stmt))
(list
"CREATE TABLE IF NOT EXISTS no_sync_metadat
(var TEXT,
val TEXT,
CONSTRAINT no_sync_metadat_constraint UNIQUE (var));"
"CREATE TABLE IF NOT EXISTS no_sync_locks
(key TEXT,
val TEXT,
CONSTRAINT no_sync_metadat_constraint UNIQUE (key));"
"CREATE TABLE IF NOT EXISTS processes
(id INTEGER PRIMARY KEY,
host TEXT,
port INTEGER,
pid INTEGER,
starttime INTEGER,
endtime INTEGER,
status TEXT,
purpose TEXT,
dbname TEXT,
mtversion TEXT,
reason TEXT DEFAULT 'none',
CONSTRAINT no_sync_processes UNIQUE (host,pid));"
))))))
(on-tmp (equal? (car (string-split dbpath "/")) "tmp"))
(db (if on-tmp
(dbfile:cautious-open-database dbname init-proc 0 "WAL")
(dbfile:cautious-open-database dbname init-proc 0 #f)
;; (sqlite3:open-database dbname)
)))
(if on-tmp ;; done in cautious-open-database
(begin
(sqlite3:execute db "PRAGMA synchronous = 0;")
(sqlite3:set-busy-handler! db (sqlite3:make-busy-timeout 136000))))
db))
;; mtest processes registry calls
(define (dbfile:insert-or-update-process nsdb dat)
(let* ((host (procinf-host dat))
(pid (procinf-pid dat))
(curr-info (dbfile:get-process-info nsdb host pid)))
(if curr-info ;; record exists, do update
(match curr-info
((host port pid starttime status purpose dbname mtversion)
(sqlite3:execute
nsdb
"UPDATE processes SET port=?,starttime=?,status=?,
purpose=?,dbname=?,mtversion=?
WHERE host=? AND pid=?;"
(or (procinf-port dat) port)
(or (procinf-start dat) starttime)
(or (procinf-status dat) status)
(or (procinf-purpose dat) purpose)
(or (procinf-dbname dat) dbname)
(or (procinf-mtversion dat) mtversion)
host pid))
(else
#f ;; what to do?
))
(dbfile:register-process
nsdb
(procinf-host dat)
(procinf-port dat)
(procinf-pid dat)
(procinf-start dat)
(procinf-status dat)
(procinf-purpose dat)
(procinf-dbname dat)
(procinf-mtversion dat)))))
(define (dbfile:register-process nsdb host port pid starttime status purpose dbname mtversion)
(sqlite3:execute nsdb "INSERT INTO processes (host,port,pid,starttime,status,purpose,dbname,mtversion) VALUES (?,?,?,?,?,?,?,?);"
host port pid starttime status purpose dbname mtversion))
(define (dbfile:set-process-status nsdb host pid newstatus)
(sqlite3:execute nsdb "UPDATE processes SET status=? WHERE host=? AND pid=?;" newstatus host pid))
(define (dbfile:get-process-options nsdb purpose dbname)
(sqlite3:fold-row
;; host port pid starttime status mtversion
(lambda (res . row)
(cons row res))
'()
nsdb
"SELECT host,port,pid,starttime,status,mtversion FROM processes WHERE purpose=? AND dbname LIKE ? AND status='alive';"
purpose dbname))
(define (dbfile:get-process-info nsdb host pid)
(let ((res (sqlite3:fold-row
;; host port pid starttime status mtversion
(lambda (res . row)
(cons row res))
'()
nsdb
"SELECT host,port,pid,starttime,status,purpose,dbname,mtversion FROM processes WHERE host=? AND pid=?;"
host pid)))
(if (null? res)
#f
(car res))))
(define (dbfile:set-process-done nsdb host pid reason)
(sqlite3:execute nsdb "UPDATE processes SET status='ended',endtime=?,reason=? WHERE host=? AND pid=?;" (current-seconds) reason host pid)
(dbfile:cleanup-old-entries nsdb))
(define (dbfile:cleanup-old-entries nsdb)
(sqlite3:execute nsdb "DELETE FROM process WHERE status='ended' AND endtime<?;" (- (current-seconds) (* 3600 48))))
;; other no-sync functions
(define (dbfile:with-no-sync-db dbpath proc)
(mutex-lock! *no-sync-db-mutex*)
(let* ((already-open *no-sync-db*)
(db (or already-open (dbfile:raw-open-no-sync-db dbpath)))
(res (proc db)))
(if (not already-open)
(sqlite3:finalize! db))
(mutex-unlock! *no-sync-db-mutex*)
res))
(define *no-sync-db-mutex* (make-mutex))
(define (dbfile:open-no-sync-db dbpath)
(mutex-lock! *no-sync-db-mutex*)
(let* ((res (if *no-sync-db*
*no-sync-db*
(let* ((db (dbfile:raw-open-no-sync-db dbpath)))
(set! *no-sync-db* db)
db))))
(mutex-unlock! *no-sync-db-mutex*)
res))
(define (db:no-sync-set db var val)
(sqlite3:execute db "INSERT OR REPLACE INTO no_sync_metadat (var,val) VALUES (?,?);" var val))
(define (db:no-sync-del! db var)
(sqlite3:execute db "DELETE FROM no_sync_metadat WHERE var=?;" var))
(define (db:no-sync-get/default db var default)
(assert (sqlite3:database? db) "FATAL: db:no-sync-get/default called with a bad db handle:" db)
(let ((res default))
(sqlite3:for-each-row
(lambda (val)
(set! res val))
db
"SELECT val FROM no_sync_metadat WHERE var=?;"
var)
(if res
(let ((newres (if (string? res)
(string->number res)
#f)))
(if newres
newres
res))
res)))
;; timestring+identifier+payload
;; locks are unique on identifier, payload is informational
(define (db:extract-time-identifier instr)
(let ((tokens (string-split instr "+")))
(match tokens
((t i)(cons (string->number t) i))
((t) (cons (string->number t) #f))
(else
(assert #f "FATAL: db:extract-time-identifier handed bad data "instr)))))
;; transaction protected lock aquisition
;; either:
;; fails returns (#f lock-creation-time identifier)
;; succeeds (returns (#t lock-creation-time identifier)
;; use (db:no-sync-del! db keyname) to release the lock
;;
(define (db:no-sync-get-lock-with-id db keyname identifier)
(sqlite3:with-transaction
db
(lambda ()
(condition-case
(let* ((curr-val (db:no-sync-get/default db keyname #f)))
(if curr-val
(match (db:extract-time-identifier curr-val) ;; result->timestamp, identifier
((timestamp . ident)
(cons (equal? ident identifier) timestamp))
(else (cons #f 'malformed-lock))) ;; lock malformed
(let ((curr-sec (current-seconds))
(lock-value (if identifier
(conc (current-seconds)"+"identifier)
(current-seconds))))
(sqlite3:execute db "INSERT OR REPLACE INTO no_sync_metadat (var,val) VALUES(?,?);" keyname lock-value)
(cons #t curr-sec))))
(exn (io-error) (dbfile:print-err "ERROR: i/o error with no-sync db. Check permissions, disk space etc. and try again."))
(exn (corrupt) (dbfile:print-err "ERROR: database no-sync db is corrupt. Repair it to proceed."))
(exn (busy) (dbfile:print-err "ERROR: database no-sync db is locked. Try copying to another location, remove original and copy back."))
(exn (permission)(dbfile:print-err "ERROR: database no-sync db has some permissions problem."))
(exn () ;; (status done) ;; I don't know how to detect status done but no data!
(dbfile:print-err "ERROR: Unknown error with database no-sync db message: exn="(condition->list exn)", \n"
((condition-property-accessor 'exn 'message) exn))
(cons #f #f))))))
(define (db:no-sync-check-lock db keyname identifier)
(let* ((curr-val (db:no-sync-get/default db keyname #f)))
(match (db:extract-time-identifier curr-val) ;; result->timestamp, identifier
((timestamp . ident)
(cons (equal? ident identifier) ident))
(else (cons #f 'no-lock)))))
;; get the lock, wait 0.25 seconds and verify still have it.
;; this should not be necessary given the use of transaction in
;; db:no-sync-get-lock-with-id but it does seem to be needed
;;
(define (db:no-sync-lock-and-check db keyname identifier)
(let* ((result (db:no-sync-get-lock-with-id db keyname identifier))
(gotlock (car result)))
(if gotlock
(begin
(thread-sleep! 0.25)
(db:no-sync-check-lock db keyname identifier))
result)))
;; transaction protected lock aquisition
;; either:
;; fails returns (#f . lock-creation-time)
;; succeeds (returns (#t . lock-creation-time)
;; use (db:no-sync-del! db keyname) to release the lock
;;
(define (db:no-sync-get-lock db keyname)
(sqlite3:with-transaction
db
(lambda ()
(condition-case
(let* ((curr-val (db:no-sync-get/default db keyname #f)))
(if curr-val
`(#f . ,curr-val) ;; (sqlite3:first-result db "SELECT val FROM no_sync_metadat WHERE var=?;" keyname))
(let ((lock-time (current-seconds)))
(sqlite3:execute db "INSERT OR REPLACE INTO no_sync_metadat (var,val) VALUES(?,?);" keyname lock-time)
`(#t . ,lock-time))))
(exn (io-error) (dbfile:print-err "ERROR: i/o error with no-sync db. Check permissions, disk space etc. and try again."))
(exn (corrupt) (dbfile:print-err "ERROR: database no-sync db is corrupt. Repair it to proceed."))
(exn (busy) (dbfile:print-err "ERROR: database no-sync db is locked. Try copying to another location, remove original and copy back."))
(exn (permission)(dbfile:print-err "ERROR: database no-sync db has some permissions problem."))
(exn () ;; (status done) ;; I don't know how to detect status done but no data!
(dbfile:print-err "ERROR: Unknown error with database no-sync db message: exn="(condition->list exn)", \n"
((condition-property-accessor 'exn 'message) exn))
`(#f . ,(current-seconds)))))))
(define (db:no-sync-get-lock-timeout db keyname timeout)
(let* ((lockdat (db:no-sync-get-lock db keyname)))
(match lockdat
((#f . lock-time)
(if (> (- (current-seconds) (if (string? lock-time)(string->number lock-time)lock-time)) timeout)
(let ((lock-time (current-seconds)))
;; (debug:print-info 2 *default-log-port* "db:no-sync-get-lock keyname=" keyname ", lock-time=" lock-time ", exn=" exn)
(sqlite3:execute db "INSERT OR REPLACE INTO no_sync_metadat (var,val) VALUES(?,?);" keyname lock-time)
`(#t . ,lock-time))
lockdat))
(else lockdat))))
;; NOTE: This will steal the lock after timeout of waiting.
;;
(define (db:with-no-sync-lock db keyname timeout proc)
(let* ((lockdat (db:no-sync-get-lock-timeout db keyname))
(gotlock (car lockdat))
(locktime (cdr lockdat)))
(if gotlock
(let ((res (proc)))
(db:no-sync-del! db keyname)
res))))
;;======================================================================
;; sync back functions pulled from db.scm
;;======================================================================
;; Get a lock from the no-sync-db for the from-db, then delta sync the from-db to the to-db, otherwise return #f
;;
(define (db:lock-and-delta-sync no-sync-db dbstruct from-db-file runid keys dbinit)
(assert (not *db-sync-in-progress*) "FATAL: db:lock-and-sync called while a sync is in progress.")
;; (dbfile:print-err *default-log-port* "db:lock-and-delta-sync")
(let* ((lock-file (conc from-db-file ".lock")))
(if (common:simple-file-lock lock-file)
(begin
(dbfile:print-err "INFO: db:lock-and-delta-sync copying db "runid" at "(current-seconds))
(set! *db-sync-in-progress* #t)
(db:sync-touched dbstruct runid keys dbinit)
(set! *db-sync-in-progress* #f)
(delete-file* lock-file)
#t)
(begin
(if (common:low-noise-print 120 (conc "no lock "from-db-file))
(dbfile:print-err "INFO: could not get lock for " from-db-file ", sync likely in progress."))
#f
))))
;; ;; Get a lock from the no-sync-db for the from-db, then delta sync the from-db to the to-db, otherwise return #f
;; ;;
;; (define (db:lock-and-delta-sync-orig no-sync-db dbstruct from-db-file runid keys dbinit)
;; (assert (not *db-sync-in-progress*) "FATAL: db:lock-and-sync called while a sync is in progress.")
;; ;; (dbfile:print-err *default-log-port* "db:lock-and-delta-sync")
;; (let* ((lockdat (db:no-sync-get-lock-timeout no-sync-db from-db-file 60))
;; (gotlock (car lockdat))
;; (locktime (cdr lockdat)))
;; ;; (debug:print-info 3 *default-log-port* "db:lock-and-delta-sync: got lock?")
;;
;; (if gotlock
;; (begin
;; (dbfile:print-err "INFO: db:lock-and-delta-sync copying db "runid" at "(current-seconds))
;; (set! *db-sync-in-progress* #t)
;; (db:sync-touched dbstruct runid keys dbinit)
;; (set! *db-sync-in-progress* #f)
;; (db:no-sync-del! no-sync-db from-db-file)
;; #t)
;; (begin
;; (dbfile:print-err "ERROR: could not get lock for " from-db-file " from no-sync-db")
;; #f
;; ))))
;; sync run from tmp disk to nfs disk if touched
;;
;; call with dbinit=db:initialize-main-db
;;
(define (db:sync-touched dbstruct run-id keys #!key dbinit (force-sync #f))
(dbfile:print-err "db:sync-touched Syncing: " (conc (if run-id run-id "main") ".db"))
(let* (;; the subdb is needed to access the mtdbdat
(subdb (or (dbfile:get-subdb dbstruct run-id)
(dbfile:init-subdb dbstruct run-id dbinit)))
(tmpdbfile (dbr:subdb-tmpdbfile subdb))
(mtdb (dbr:subdb-mtdbdat subdb))
(tmpdb (db:open-db dbstruct run-id dbinit)) ;; sqlite3-db tmpdbfile #f))
(start-t (current-seconds)))
(mutex-lock! *db-multi-sync-mutex*)
(let ((update_info (cons "last_update" (if force-sync 0 *db-last-sync*) )))
(mutex-unlock! *db-multi-sync-mutex*)
(db:sync-tables (db:sync-all-tables-list keys) update_info tmpdb mtdb))
(mutex-lock! *db-multi-sync-mutex*)
(set! *db-last-sync* start-t)
(set! *db-last-access* start-t)
(mutex-unlock! *db-multi-sync-mutex*)
(dbfile:add-dbdat dbstruct run-id tmpdb)
#t))
;; just tests, test_steps and test_data tables
(define db:sync-tests-only
(list
;; (list "strs"
;; '("id" #f)
;; '("str" #f))
(list "tests"
'("id" #f)
'("run_id" #f)
'("testname" #f)
'("host" #f)
'("cpuload" #f)
'("diskfree" #f)
'("uname" #f)
'("rundir" #f)
'("shortdir" #f)
'("item_path" #f)
'("state" #f)
'("status" #f)
'("attemptnum" #f)
'("final_logf" #f)
'("logdat" #f)
'("run_duration" #f)
'("comment" #f)
'("event_time" #f)
'("fail_count" #f)
'("pass_count" #f)
'("archived" #f)
'("last_update" #f))
(list "test_steps"
'("id" #f)
'("test_id" #f)
'("stepname" #f)
'("state" #f)
'("status" #f)
'("event_time" #f)
'("comment" #f)
'("logfile" #f)
'("last_update" #f))
(list "test_data"
'("id" #f)
'("test_id" #f)
'("category" #f)
'("variable" #f)
'("value" #f)
'("expected" #f)
'("tol" #f)
'("units" #f)
'("comment" #f)
'("status" #f)
'("type" #f)
'("last_update" #f))))
;; needs db to get keys, this is for syncing all tables
;;
(define (db:sync-main-list keys)
(let ((keys keys))
(list
(list "keys"
'("id" #f)
'("fieldname" #f)
'("fieldtype" #f))
(list "metadat" '("var" #f) '("val" #f))
(append (list "runs"
'("id" #f))
(map (lambda (k)(list k #f))
(append keys
(list "runname" "state" "status" "owner" "event_time" "comment" "fail_count" "pass_count" "contour" "last_update"))))
(list "archive_disks"
'("id" #f)
'("archive_area_name" #f)
'("disk_path" #f)
'("last_df" #f)
'("last_df_time" #f)
'("creation_time" #f))
(list "archive_blocks"
'("id" #f)
'("archive_disk_id" #f)
'("disk_path" #f)
'("last_du" #f)
'("last_du_time" #f)
'("creation_time" #f))
(list "test_meta"
'("id" #f)
'("testname" #f)
'("owner" #f)
'("description" #f)
'("reviewed" #f)
'("iterated" #f)
'("avg_runtime" #f)
'("avg_disk" #f)
'("tags" #f)
'("jobgroup" #f))
(list "tasks_queue"
'("id" #f)
'("action" #f)
'("owner" #f)
'("state" #f)
'("target" #f)
'("name" #f)
'("testpatt" #f)
'("keylock" #f)
'("params" #f)
'("creation_time" #f)
'("execution_time" #f))
)))
(define (db:sync-all-tables-list keys)
(append (db:sync-main-list keys)
db:sync-tests-only))
;; tbls is ( ("tablename" ( "field1" [#f|proc1] ) ( "field2" [#f|proc2] ) .... ) )
;; db's are dbdat's
;;
;; if last-update specified ("field-name" . time-in-seconds)
;; then sync only records where field-name >= time-in-seconds
;; IFF field-name exists
;;
(define (db:sync-tables tbls last-update fromdb todb . slave-dbs)
(handle-exceptions
exn
(begin
(dbfile:print-err "EXCEPTION: database probably overloaded or unreadable in db:sync-tables.")
(print-call-chain (current-error-port))
(dbfile:print-err " message: " ((condition-property-accessor 'exn 'message) exn))
(dbfile:print-err "exn=" (condition->list exn))
(dbfile:print-err " status: " ((condition-property-accessor 'sqlite3 'status) exn))
(dbfile:print-err " src db: " (dbr:dbdat-dbfile fromdb))
(for-each (lambda (dbdat)
(let ((dbpath (dbr:dbdat-dbfile dbdat)))
(dbfile:print-err " dbpath: " dbpath)
(if #t ;; (not (db:repair-db dbdat))
(begin
(dbfile:print-err "Failed to rebuild (repair is turned off) " dbpath ", exiting now.")
(exit)))))
(cons todb slave-dbs))
0)
;; this is the work to be done")
(cond
((not fromdb) (dbfile:print-err "WARNING: db:sync-tables called with fromdb missing")
-1)
((not todb) (dbfile:print-err "WARNING: db:sync-tables called with todb missing")
-2)
((not (sqlite3:database? (dbr:dbdat-dbh fromdb)))
(dbfile:print-err "db:sync-tables called with fromdb not a database " fromdb)
-3)
((not (sqlite3:database? (dbr:dbdat-dbh todb)))
(dbfile:print-err "db:sync-tables called with todb not a database " todb)
-4)
((not (file-write-access? (dbr:dbdat-dbfile todb)))
(dbfile:print-err "db:sync-tables called with todb not a read-only database " todb)
-5)
((not (null? (let ((readonly-slave-dbs
(filter
(lambda (dbdat)
(not (file-write-access? (dbr:dbdat-dbfile todb))))
slave-dbs)))
(for-each
(lambda (bad-dbdat)
(dbfile:print-err "db:sync-tables called with todb not a read-only database " bad-dbdat))
readonly-slave-dbs)
readonly-slave-dbs))) -6)
(else
;; (dbfile:print-err "db:sync-tables: args are good")
(let ((stmts (make-hash-table)) ;; table-field => stmt
(all-stmts '()) ;; ( ( stmt1 value1 ) ( stml2 value2 ))
(numrecs (make-hash-table))
(start-time (current-milliseconds))
(tot-count 0))
(for-each ;; table
(lambda (tabledat)
(let* ((tablename (car tabledat))
(fields (cdr tabledat))
(has-last-update (member "last_update" fields))
(use-last-update (cond
((and has-last-update
(member "last_update" fields))
#t) ;; if given a number, just use it for all fields
((number? last-update) #f) ;; if not matched first entry then ignore last-update for this table
((and (pair? last-update)
(member (car last-update) ;; last-update field name
(map car fields)))
#t)
((and last-update (not (pair? last-update)) (not (number? last-update)))
(dbfile:print-err "ERROR: parameter last-update for db:sync-tables must be a pair or a number, received: " last-update);; found in fields
#f)
(else
#f)))
(last-update-value (if use-last-update ;; no need to check for has-last-update - it is already accounted for
(if (number? last-update)
last-update
(cdr last-update))
#f))
(last-update-field (if use-last-update
(if (number? last-update)
"last_update"
(car last-update))
#f))
(num-fields (length fields))
(field->num (make-hash-table))
(num->field (apply vector (map car fields))) ;; BBHERE
(full-sel (conc "SELECT " (string-intersperse (map car fields) ",")
" FROM " tablename (if use-last-update ;; apply last-update criteria
(conc " WHERE " last-update-field " >= " last-update-value)
"")
";"))
(full-ins (conc "INSERT OR REPLACE INTO " tablename " ( " (string-intersperse (map car fields) ",") " ) "
" VALUES ( " (string-intersperse (make-list num-fields "?") ",") " );"))
(fromdat '())
(fromdats '())
(totrecords 0)
(batch-len 100) ;; (string->number (or (configf:lookup *configdat* "sync" "batchsize") "100")))
(todat (make-hash-table))
(count 0)
(field-names (map car fields))
(delay-handicap 0) ;; (string->number (or (configf:lookup *configdat* "sync" "delay-handicap") "0")))
)
;; set up the field->num table
(for-each
(lambda (field)
(hash-table-set! field->num field count)
(set! count (+ count 1)))
fields)
;; read the source table
;; store a list of all rows in the table in fromdat, up to batch-len.
;; Then add fromdat to the fromdats list, clear fromdat and repeat.
(sqlite3:with-transaction
(dbr:dbdat-dbh fromdb)
(lambda ()
(sqlite3:for-each-row
(lambda (a . b)
(set! fromdat (cons (apply vector a b) fromdat))
(if (> (length fromdat) batch-len)
(begin
(set! fromdats (cons fromdat fromdats))
(set! fromdat '())
(set! totrecords (+ totrecords 1)))
)
)
(dbr:dbdat-dbh fromdb)
full-sel)
)
)
;; Count less than batch-len as a record
(if (> (length fromdat) 0)
(set! totrecords (+ totrecords 1)))
;; tack on remaining records in fromdat
(if (not (null? fromdat))
(set! fromdats (cons fromdat fromdats)))
(sqlite3:for-each-row
(lambda (a . b)
(hash-table-set! todat a (apply vector a b)))
(dbr:dbdat-dbh todb)
full-sel)
(when (and delay-handicap (> delay-handicap 0))
(dbfile:print-err "imposing synthetic sync delay of "delay-handicap" seconds since sync/delay-handicap is configured")
(thread-sleep! delay-handicap)
(dbfile:print-err "synthetic sync delay of "delay-handicap" seconds completed")
)
;; first pass implementation, just insert all changed rows
(for-each
(lambda (targdb)
(let* ((db (dbr:dbdat-dbh targdb))
(drp-trigger (if (member "last_update" field-names)
(db:drop-trigger db tablename)
#f))
(has-last-update (member "last_update" field-names))
(is-trigger-dropped (if has-last-update
(db:is-trigger-dropped db tablename)
#f))
(stmth (sqlite3:prepare db full-ins))
(changed-rows 0))
(for-each
(lambda (fromdat-lst)
(sqlite3:with-transaction
db
(lambda ()
(for-each ;;
(lambda (fromrow)
(let* ((a (vector-ref fromrow 0))
(curr (hash-table-ref/default todat a #f))
(same #t))
(let loop ((i 0))
(if (or (not curr)
(not (equal? (vector-ref fromrow i)(vector-ref curr i))))
(set! same #f))
(if (and same
(< i (- num-fields 1)))
(loop (+ i 1))))
(if (not same)
(begin
(apply sqlite3:execute stmth (vector->list fromrow))
(hash-table-set! numrecs tablename (+ 1 (hash-table-ref/default numrecs tablename 0)))
(set! changed-rows (+ changed-rows 1))
)
)
))
fromdat-lst))))
fromdats)
(sqlite3:finalize! stmth)
(if (member "last_update" field-names)
(db:create-trigger db tablename))))
(append (list todb) slave-dbs)
)
)
)
tbls)
(let* ((runtime (- (current-milliseconds) start-time))
(should-print (or ;; (debug:debug-mode 12)
(common:low-noise-print 120 "db sync")
(> runtime 500)))) ;; low and high sync times treated as separate.
(for-each
(lambda (dat)
(let ((tblname (car dat))
(count (cdr dat)))
(set! tot-count (+ tot-count count))
))
(sort (hash-table->alist numrecs)(lambda (a b)(> (cdr a)(cdr b))))))
tot-count)))))
;;======================================================================
;; trigger setup/takedown
;;======================================================================
(define db:trigger-list
(list (list "update_runs_trigger" "CREATE TRIGGER IF NOT EXISTS update_runs_trigger AFTER UPDATE ON runs
FOR EACH ROW
BEGIN
UPDATE runs SET last_update=(strftime('%s','now'))
WHERE id=old.id;
END;" )
(list "update_run_stats_trigger" "CREATE TRIGGER IF NOT EXISTS update_run_stats_trigger AFTER UPDATE ON run_stats
FOR EACH ROW
BEGIN
UPDATE run_stats SET last_update=(strftime('%s','now'))
WHERE id=old.id;
END;" )
(list "update_tests_trigger" "CREATE TRIGGER IF NOT EXISTS update_tests_trigger AFTER UPDATE ON tests
FOR EACH ROW
BEGIN
UPDATE tests SET last_update=(strftime('%s','now'))
WHERE id=old.id;
END;" )
(list "update_teststeps_trigger" "CREATE TRIGGER IF NOT EXISTS update_teststeps_trigger AFTER UPDATE ON test_steps
FOR EACH ROW
BEGIN
UPDATE test_steps SET last_update=(strftime('%s','now'))
WHERE id=old.id;
END;" )
(list "update_test_data_trigger" "CREATE TRIGGER IF NOT EXISTS update_test_data_trigger AFTER UPDATE ON test_data
FOR EACH ROW
BEGIN
UPDATE test_data SET last_update=(strftime('%s','now'))
WHERE id=old.id;
END;" )))
(define (db:is-trigger-dropped db tbl-name)
(let* ((trigger-name (if (equal? tbl-name "test_steps")
"update_teststeps_trigger"
(conc "update_" tbl-name "_trigger")))
(res #f))
(sqlite3:for-each-row
(lambda (name)
(if (equal? name trigger-name)
(set! res #t)))
db
"SELECT name FROM sqlite_master WHERE type = 'trigger' ;")
res))
(define (db:drop-triggers db)
(for-each
(lambda (key)
(sqlite3:execute db (conc "drop trigger if exists " (car key))))
db:trigger-list))
(define (db:drop-trigger db tbl-name)
(let* ((trigger-name (if (equal? tbl-name "test_steps")
"update_teststeps_trigger"
(conc "update_" tbl-name "_trigger"))))
(for-each
(lambda (key)
(if (equal? (car key) trigger-name)
(sqlite3:execute db (conc "drop trigger if exists " trigger-name))))
db:trigger-list)))
(define (db:create-trigger db tbl-name)
(let* ((trigger-name (if (equal? tbl-name "test_steps")
"update_teststeps_trigger"
(conc "update_" tbl-name "_trigger"))))
(for-each (lambda (key)
(if (equal? (car key) trigger-name)
(sqlite3:execute db (cadr key))))
db:trigger-list)))
;;======================================================================
;; db access stuff
;;======================================================================
;; call with dbinit=db:initialize-main-db
;;
(define (db:open-db dbstruct run-id dbinit)
;; (mutex-lock! *db-open-mutex*)
(let* ((dbdat (dbfile:open-db dbstruct run-id dbinit)))
(set! *db-write-access* (not (dbr:dbdat-read-only dbdat)))
;; (mutex-unlock! *db-open-mutex*)
dbdat))
(define dbfile:db-init-proc (make-parameter #f))
;; in xmaxima this gives a curve close to what I want:
;; plot2d ((exp(x/1.2)-1)/300, [x, 0, 10])$
;; plot2d ((exp(x/1.5)-1)/40, [x, 0, 10])$
;; plot2d ((exp(x/5)-1)/40, [x, 0, 20])$
(define (dbfile:droop x)
(/ (- (exp (/ x 5)) 1) 40))
;; (* numqrys (/ 1 (qif-slope))))
;; create a dropping near the db file in a qif dir
;; use count of such files to gate queries (queries in flight)
;;
(define (dbfile:wait-for-qif fname run-id params)
(let* ((thedir (pathname-directory fname))
(dbnum (dbfile:run-id->dbnum run-id))
(destdir (conc thedir"/qif-"dbnum))
(uniqn (get-area-path-signature (conc dbnum params)))
(crumbn (conc destdir"/"(current-seconds)"-"uniqn"."(current-process-id))))
(if (not (file-exists? destdir))(create-directory (conc destdir"/attic") #t))
(let loop ((count 0))
(let* ((currlks (glob (conc destdir"/*")))
(numqrys (length currlks))
(delayval (cond ;; do a droopish curve
((> numqrys 25)
(for-each
(lambda (f)
(if (> (- (current-seconds)
(handle-exceptions
exn
(current-seconds) ;; file is likely gone, just fake out
(file-modification-time f)))
(keep-age-param))
(let* ((basedir (pathname-directory f))
(filen (pathname-file f))
(destf (conc basedir"/attic/"filen)))
(dbfile:print-err "Moving qif file "f" older than 10 seconds to "destf)
;; (delete-file* f)
(handle-exceptions
exn
#t
(file-move f destf #t)))))
currlks)
4)
((> numqrys 0) (dbfile:droop numqrys)) ;; slope of 1/100
(else #f))))
(if (and delayval
(< count 5))
(begin
(thread-sleep! delayval)
(loop (+ count 1))))))
(with-output-to-file crumbn
(lambda ()
(print fname" run-id="run-id" params="params)
))
crumbn))
;; ;; (db:with-db dbstruct run-id sqlite3:exec "select blah fgrom blaz;")
;; ;; r/w is a flag to indicate if the db is modified by this query #t = yes, #f = no
;; ;;
;; ;; Used only with http - to be removed
;; ;;
;; (define (dbfile:with-db dbstruct run-id r/w proc params)
;; (assert dbstruct "FATAL: db:with-db called with dbstruct "#f)
;; (assert (dbr:dbstruct? dbstruct) "FATAL: dbstruct is "dbstruct)
;; ;; Testing 2023, March 14th. I went from full time use of the mutext to no use at all and
;; ;; didn't see much change in the frequency of the messages:
;; ;; Warning (#<thread: thread14974>): in thread: (bind!) bad parameter or other API misuse
;; ;; allowing request count to go up to 1000 and other crashes showed up:
;; ;; Warning (#<thread: thread1889>): in thread: (deserialize) unexpected end of input: #<input port "(tcp)">
;; ;;
;; ;; leave it fully on for now, test later if there is a performance issue
;; ;;
;; (let* ((use-mutex #t) ;;(> *api-process-request-count* 50)) ;; risk of db corruption
;; (have-struct (dbr:dbstruct? dbstruct))
;; (dbdat (if have-struct ;; this stuff just allows us to call with a db handle directly
;; (db:open-db dbstruct run-id (dbfile:db-init-proc)) ;; (dbfile:get-subdb dbstruct run-id)
;; #f))
;; (db (if have-struct ;; this stuff just allows us to call with a db handle directly
;; (dbr:dbdat-dbh dbdat)
;; dbstruct))
;; (fname (if dbdat
;; (dbr:dbdat-dbfile dbdat)
;; "nofilenameavailable"))
;; (jfile (conc fname"-journal"))
;; (qryproc (lambda ()
;; (if use-mutex (mutex-lock! *db-with-db-mutex*))
;; (let ((res (apply proc dbdat db params))) ;; the actual call is here.
;; (if use-mutex (mutex-unlock! *db-with-db-mutex*))
;; ;; (if (vector? dbstruct)(db:done-with dbstruct run-id r/w))
;; (if dbdat
;; (dbfile:add-dbdat dbstruct run-id dbdat))
;; ;; (delete-file* crumbfile)
;; res)))
;; (stop-train (conc (dbr:dbstruct-areapath dbstruct)"/stop-the-train")))
;;
;; (assert (sqlite3:database? db) "FATAL: db:with-db, db is not a database, db="db
;; ", fname="fname)
;; (if (file-exists? jfile)
;; (begin
;; (dbfile:print-err "INFO: "jfile" exists, delaying to reduce database load")
;; (thread-sleep! 0.2)))
;; (if (and use-mutex
;; (common:low-noise-print 120 "over-50-parallel-api-requests"))
;; (dbfile:print-err *api-process-request-count*
;; " parallel api requests being processed in process "
;; (current-process-id))) ;; ", throttling access"))
;; (case (no-condition-db-with-db)
;; ((production)(qryproc))
;; ((suicide-mode)
;; (handle-exceptions
;; exn
;; (with-output-to-file stop-train
;; (lambda ()
;; (db:generic-error-printout exn "Stop train mode, run-id: "run-id
;; " params: "params" proc: "proc)))
;; (qryproc)))
;; (else
;; (condition-case
;; (qryproc)
;; (exn (io-error)
;; (db:generic-error-printout exn "ERROR: i/o error with "fname
;; ". Check permissions, disk space etc. and try again."))
;; (exn (corrupt)
;; (db:generic-error-printout exn "ERROR: database "fname
;; " is corrupt. Repair it to proceed."))
;; (exn (busy)
;; (db:generic-error-printout exn "ERROR: database "fname
;; " is locked. Try copying to another location,"
;; " remove original and copy back."))
;; (exn (permission)(db:generic-error-printout exn "ERROR: database "fname
;; " has some permissions problem."))
;; (exn ()
;; (db:generic-error-printout exn "ERROR: Unknown error with database "fname
;; " message: "
;; ((condition-property-accessor 'exn 'message) exn))))))))
;;======================================================================
;; another attempt at a transactionized queue
;;======================================================================
;; ;; ;; (define *transaction-queues* (make-hash-table))
;; ;; ;;
;; ;; ;; (define (db:get-queue run-id)
;; ;; ;; (let* ((res (hash-table-ref/default *transaction-queues* run-id #f)))
;; ;; ;; (if res
;; ;; ;; res
;; ;; ;; (let* ((newq (make-queue)))
;; ;; ;; (hash-table-set! *transaction-queues* run-id newq)
;; ;; ;; newq))))
;; ;; ;;
;; ;; ;; (define (db:add-to-transaction-queue dbstruct proc params)
;; ;; ;; (let* ((mbox (make-mailbox))
;; ;; ;; (q (db:get-queue run-id)))
;; ;; ;; (queue-add! *transaction-queue* (list dbstruct proc mbox))
;; ;; ;; (mailbox-receive mbox)))
;; ;; ;;
;; ;; ;; (define (db:process-transaction-queue *dbstruct-dbs*)
;; ;; ;; (for-each
;; ;; ;; (lambda (run-id)
;; ;; ;; (let* ((q (hash-table-ref *transaction-queue* run-id)))
;; ;; ;; ;; with-transaction
;; ;; ;; ;; dbstruct
;; ;; ;; ;; pop items from queue and execute them, return results via mailbox
;; ;; ;; q
;; ;; ;; ;; pop
;; ;; ;; ))
;; ;; ;; (hash-table-keys *transaction-queues*)))
;;======================================================================
;; file utils
;;======================================================================
;;======================================================================
;; lazy-safe get file mod time. on any error (file not existing etc.) return 0
;;
(define (dbfile:lazy-modification-time fpath)
(handle-exceptions
exn
(begin
(dbfile:print-err "Failed to get modification time for " fpath ", treating it as zero. exn=" exn)
0)
(if (file-exists? fpath)
(file-modification-time fpath)
0)))
;;======================================================================
;; find timestamp of newest file associated with a sqlite db file
(define (dbfile:lazy-sqlite-db-modification-time fpath)
(let* ((glob-list (handle-exceptions
exn
(begin
(dbfile:print-err "Failed to glob " fpath "*, exn=" exn)
`(,(conc "/no/such/file, message: " ((condition-property-accessor 'exn 'message) exn))))
(glob (conc fpath "*"))))
(file-list (if (eq? 0 (length glob-list))
'("/no/such/file")
glob-list)))
(apply max
(map
dbfile:lazy-modification-time
file-list))))
;; dot-locking egg seems not to work, using this for now
;; if lock is older than expire-time then remove it and try again
;; to get the lock
;;
(define (dbfile:simple-file-lock fname #!key (expire-time 300))
(let ((fmod-time (handle-exceptions
ext
(current-seconds)
(file-modification-time fname))))
;; if the file exists, if it has expired, delete it and call this function recursively.
(if (file-exists? fname)
(if (> (- (current-seconds) fmod-time) expire-time)
(begin
(dbfile:print-err "simple-file-lock: removing expired file: " fname)
(handle-exceptions exn #f (delete-file* fname))
(dbfile:simple-file-lock fname expire-time: expire-time))
#f
)
;; If it doesn't exist, write the host name and process id to the file
(let ((key-string (conc (get-host-name) "-" (current-process-id) ": " (argv)))
(oup (open-output-file fname)))
(with-output-to-port
oup
(lambda ()
(print key-string)))
(close-output-port oup)
;; sleep 3 seconds and make sure it still exists and contains the same host/process id.
;; if not, return #f
(thread-sleep! 0.25)
(if (file-exists? fname)
(handle-exceptions exn
#f
(with-input-from-file fname
(lambda ()
(equal? key-string (read-line)))))
(begin
(dbfile:print-err "dbfile:simple-file-lock created " fname " but it was gone 3 seconds later")
#f
)
)
)
)
)
)
(define (dbfile:simple-file-lock-and-wait fname #!key (expire-time 300))
(let ((end-time (+ expire-time (current-seconds))))
(let loop ((got-lock (dbfile:simple-file-lock fname expire-time: expire-time)))
(if got-lock
#t
(if (> end-time (current-seconds))
(begin
(thread-sleep! 3)
(loop (dbfile:simple-file-lock fname expire-time: expire-time)))
#f)))))
(define (dbfile:simple-file-release-lock fname)
(handle-exceptions
exn
#f ;; I don't really care why this failed (at least for now)
(delete-file* fname)))
(define (dbfile:with-simple-file-lock fname proc #!key (expire-time 300)(run-anyway #f))
(let ((start-time (current-seconds))
(gotlock (dbfile:simple-file-lock-and-wait fname expire-time: expire-time))
(end-time (current-seconds))
)
(if gotlock
(let ((res (proc)))
(dbfile:simple-file-release-lock fname)
res)
(begin
(dbfile:print-err "dbfile:with-simple-file-lock: " fname " is locked by "
(handle-exceptions
exn
"unreadable"
(with-input-from-file fname
(lambda ()
(read-line)))))
(dbfile:print-err "wait time = " (- end-time start-time))
(dbfile:print-err "ERROR: simple file lock could not get a lock for " fname " in " expire-time " seconds")
(if run-anyway
(let ((res (proc)))
(dbfile:simple-file-release-lock fname)
res)
#f)))))
(define *get-cache-stmth-mutex* (make-mutex))
(define (db:get-cache-stmth dbdat db stmt)
(mutex-lock! *get-cache-stmth-mutex*)
(let* (;; (dbdat (dbfile:get-dbdat dbstruct run-id))
(stmt-cache (dbr:dbdat-stmt-cache dbdat))
;; (stmth (db:hoh-get stmt-cache db stmt))
(stmth (hash-table-ref/default stmt-cache stmt #f))
(result (or stmth
(let* ((newstmth (sqlite3:prepare db stmt)))
;; (db:hoh-set! stmt-cache db stmt newstmth)
(hash-table-set! stmt-cache stmt newstmth)
newstmth))))
(mutex-unlock! *get-cache-stmth-mutex*)
result))
)