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;; PURPOSE.
;;======================================================================
;;======================================================================
;; Database access
;;======================================================================
(require-extension (srfi 18) extras tcp)
(use sqlite3 srfi-1 posix regex regex-case srfi-69 csv-xml s11n md5 message-digest base64 format dot-locking z3)
(import (prefix sqlite3 sqlite3:))
(import (prefix base64 base64:))
(declare (unit db))
(declare (uses common))
(declare (uses keys))
(declare (uses ods))
(declare (uses client))
(declare (uses mt))
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;; PURPOSE.
;;======================================================================
;;======================================================================
;; Database access
;;======================================================================
;; dbstruct vector containing all the relevant dbs like main.db, megatest.db, run.db etc
(require-extension (srfi 18) extras tcp) ;; 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)
(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))
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(define *number-non-write-queries* 0)
;;======================================================================
;; SQLITE3 HELPERS
;;======================================================================
(define (db:general-sqlite-error-dump exn stmt . params)
(let ((err-status ((condition-property-accessor 'sqlite3 'status #f) exn)))
;; check for (exn sqlite3) ((condition-property-accessor 'exn 'message) exn)
(print "err-status: " err-status)
(debug:print-error 0 *default-log-port* " query " stmt " failed, params: " params ", error: " ((condition-property-accessor 'exn 'message) exn))
(print-call-chain (current-error-port))))
;; convert to -inline
(define (db:first-result-default db stmt default . params)
(handle-exceptions
exn
(let ((err-status ((condition-property-accessor 'sqlite3 'status #f) exn)))
;; check for (exn sqlite3) ((condition-property-accessor 'exn 'message) exn)
(if (eq? err-status 'done)
default
(begin
(debug:print-error 0 *default-log-port* " query " stmt " failed, params: " params ", error: " ((condition-property-accessor 'exn 'message) exn))
(print-call-chain (current-error-port))
default)))
(apply sqlite3:first-result db stmt params)))
;; Get/open a database
;; if run-id => get run specific db
;; if #f => get main db
;; if db already open - return inmem
;; if db not open, open inmem, rundb and sync then return inmem
;; inuse gets set automatically for rundb's
;;
(define (db:get-db dbstruct run-id)
(if (sqlite3:database? dbstruct) ;; pass sqlite3 databases on through
dbstruct
(begin
(let ((dbdat (if (or (not run-id)
(eq? run-id 0))
(db:open-main dbstruct)
(db:open-rundb dbstruct run-id)
)))
dbdat))))
(define (db:dbdat-get-db dbdat)
(if (pair? dbdat)
(car dbdat)
dbdat))
(define (db:dbdat-get-path dbdat)
(if (pair? dbdat)
(cdr dbdat)
#f))
;; mod-read:
;; 'mod modified data
;; 'read read data
;;
(define (db:done-with dbstruct run-id mod-read)
(if (not (sqlite3:database? dbstruct))
(begin
(mutex-lock! *rundb-mutex*)
(if (eq? mod-read 'mod)
(dbr:dbstruct-set-mtime! dbstruct (current-milliseconds))
(dbr:dbstruct-set-rtime! dbstruct (current-milliseconds)))
(dbr:dbstruct-set-inuse! dbstruct #f)
(mutex-unlock! *rundb-mutex*))))
;; (db:with-db dbstruct run-id sqlite3:exec "select blah from blaz;")
;; r/w is a flag to indicate if the db is modified by this query #t = yes, #f = no
;;
(define (db:with-db dbstruct run-id r/w proc . params)
(let* ((dbdat (if (vector? dbstruct)
(db:get-db dbstruct run-id)
dbstruct)) ;; cheat, allow for passing in a dbdat
(db (db:dbdat-get-db dbdat)))
(db:delay-if-busy dbdat)
(handle-exceptions
exn
(begin
(debug:print-error 0 *default-log-port* "sqlite3 issue in db:with-db, dbstruct=" dbstruct ", run-id=" run-id ", proc=" proc ", params=" params " error: " ((condition-property-accessor 'exn 'message) exn))
(print-call-chain (current-error-port)))
(let ((res (apply proc db params)))
(if (vector? dbstruct)(db:done-with dbstruct run-id r/w))
res))))
;;======================================================================
;; K E E P F I L E D B I N dbstruct
;;======================================================================
;; (define (db:get-filedb dbstruct run-id)
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(define *number-non-write-queries* 0)
;;======================================================================
;; SQLITE3 HELPERS
;;======================================================================
(define (db:general-sqlite-error-dump exn stmt . params)
(let ((err-status ((condition-property-accessor 'sqlite3 'status #f) exn))) ;; RADT ... how does this work?
;; check for (exn sqlite3) ((condition-property-accessor 'exn 'message) exn)
(print "err-status: " err-status)
(debug:print-error 0 *default-log-port* " query " stmt " failed, params: " params ", error: " ((condition-property-accessor 'exn 'message) exn))
(print-call-chain (current-error-port))))
;; convert to -inline RADT => how inline?
(define (db:first-result-default db stmt default . params)
(handle-exceptions
exn
(let ((err-status ((condition-property-accessor 'sqlite3 'status #f) exn)))
;; check for (exn sqlite3) ((condition-property-accessor 'exn 'message) exn)
(if (eq? err-status 'done)
default
(begin
(debug:print-error 0 *default-log-port* " query " stmt " failed, params: " params ", error: " ((condition-property-accessor 'exn 'message) exn))
(print-call-chain (current-error-port))
default)))
(apply sqlite3:first-result db stmt params)))
;; Get/open a database
;; if run-id => get run specific db
;; if #f => get main db
;; if db already open - return inmem
;; if db not open, open inmem, rundb and sync then return inmem
;; inuse gets set automatically for rundb's
;;
(define (db:get-db dbstruct run-id) ;; RADT => Where is dbstruct defined?
(if (sqlite3:database? dbstruct) ;; pass sqlite3 databases on through
dbstruct
(begin
(let ((dbdat (if (or (not run-id)
(eq? run-id 0))
(db:open-main dbstruct)
(db:open-rundb dbstruct run-id)
)))
dbdat))))
;;RADT => Purpose of dbdat?
;;
(define (db:dbdat-get-db dbdat)
(if (pair? dbdat)
(car dbdat)
dbdat))
(define (db:dbdat-get-path dbdat)
(if (pair? dbdat)
(cdr dbdat)
#f))
;; mod-read:
;; 'mod modified data
;; 'read read data
;; Locks the mutex and depending on 'mod or 'read passed, sets the last timestamp in dbstruct
;;
(define (db:done-with dbstruct run-id mod-read)
(if (not (sqlite3:database? dbstruct))
(begin
(mutex-lock! *rundb-mutex*)
(if (eq? mod-read 'mod)
(dbr:dbstruct-set-mtime! dbstruct (current-milliseconds))
(dbr:dbstruct-set-rtime! dbstruct (current-milliseconds)))
(dbr:dbstruct-set-inuse! dbstruct #f)
(mutex-unlock! *rundb-mutex*))))
;; (db:with-db dbstruct run-id sqlite3:exec "select blah from blaz;")
;; r/w is a flag to indicate if the db is modified by this query #t = yes, #f = no
;;
(define (db:with-db dbstruct run-id r/w proc . params)
(let* ((dbdat (if (vector? dbstruct)
(db:get-db dbstruct run-id)
dbstruct)) ;; cheat, allow for passing in a dbdat
(db (db:dbdat-get-db dbdat))) ;;RADT => dbdat should already be a database, why need this function
(db:delay-if-busy dbdat)
(handle-exceptions
exn
(begin
(debug:print-error 0 *default-log-port* "sqlite3 issue in db:with-db, dbstruct=" dbstruct ", run-id=" run-id ", proc=" proc ", params=" params " error: " ((condition-property-accessor 'exn 'message) exn))
(print-call-chain (current-error-port)))
(let ((res (apply proc db params)))
(if (vector? dbstruct)(db:done-with dbstruct run-id r/w)) ;; RA => Mark timestamp on defstruct RADT => How come 'mod not passed instead of r/w
res))))
;;======================================================================
;; K E E P F I L E D B I N dbstruct
;;======================================================================
;; (define (db:get-filedb dbstruct run-id)
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;; NB// #f => return dbdir only
;; (was planned to be; zeroth db with name=main.db)
;;
(define (db:dbfile-path run-id)
(let* ((dbdir (db:get-dbdir))
(fname (if run-id
(if (eq? run-id 0) "main.db" (conc run-id ".db"))
#f)))
(handle-exceptions
exn
(begin
(debug:print-error 0 *default-log-port* "Couldn't create path to " dbdir)
(exit 1))
(if (not (directory? dbdir))(create-directory dbdir #t)))
(if fname
(conc dbdir "/" fname)
dbdir)))
(define (db:get-dbdir)
(or (configf:lookup *configdat* "setup" "dbdir")
(conc (configf:lookup *configdat* "setup" "linktree") "/.db")))
(define (db:set-sync db)
(let ((syncprag (configf:lookup *configdat* "setup" "sychronous")))
(sqlite3:execute db (conc "PRAGMA synchronous = " (or syncprag 1) ";"))))
;; open an sql database inside a file lock
;;
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;; NB// #f => return dbdir only
;; (was planned to be; zeroth db with name=main.db)
;;
(define (db:dbfile-path run-id)
(let* ((dbdir (db:get-dbdir))
(fname (if run-id
(if (eq? run-id 0) "main.db" (conc run-id ".db")) ;;main.db is assigned if run-id 0; does it mean main.db same as 1.db???
#f)))
(handle-exceptions
exn
(begin
(debug:print-error 0 *default-log-port* "Couldn't create path to " dbdir)
(exit 1))
(if (not (directory? dbdir))(create-directory dbdir #t)))
(if fname
(conc dbdir "/" fname) ;;RADT => why not creating fname db if does not exist here
dbdir)))
;; Returns the database location as specified in config file
;;
(define (db:get-dbdir)
(or (configf:lookup *configdat* "setup" "dbdir")
(conc (configf:lookup *configdat* "setup" "linktree") "/.db")))
(define (db:set-sync db)
(let ((syncprag (configf:lookup *configdat* "setup" "sychronous")))
(sqlite3:execute db (conc "PRAGMA synchronous = " (or syncprag 1) ";")))) ;; RADT => advantage of PRAGMA here??
;; open an sql database inside a file lock
;; returns: db existed-prior-to-opening
;; RA => Returns a db handler; sets the lock if opened in writable mode
;;
(define (db:lock-create-open fname initproc)
;; (if (file-exists? fname)
;; (let ((db (sqlite3:open-database fname)))
;; (sqlite3:set-busy-handler! db (make-busy-timeout 136000))
;; (db:set-sync db) ;; (sqlite3:execute db "PRAGMA synchronous = 0;")
;; db)
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(dbr:dbstruct-set-refdb! dbstruct refdb)
(db:sync-tables db:sync-tests-only inmem refdb) ;; use inmem as the reference, don't read again from db
;; sync once more to deal with delays?
;; (db:sync-tables db:sync-tests-only db inmem)
;; (db:sync-tables db:sync-tests-only inmem refdb)
inmem)))))))
;; This routine creates the db. It is only called if the db is not already ls opened
;;
(define (db:open-main dbstruct) ;; (conc *toppath* "/megatest.db") (car *configinfo*)))
(let ((mdb (dbr:dbstruct-get-main dbstruct)))
(if mdb
mdb
(begin
(mutex-lock! *rundb-mutex*)
(let* ((dbpath (db:dbfile-path 0))
(dbexists (file-exists? dbpath))
(db (db:lock-create-open dbpath db:initialize-main-db))
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(dbr:dbstruct-set-refdb! dbstruct refdb)
(db:sync-tables db:sync-tests-only inmem refdb) ;; use inmem as the reference, don't read again from db
;; sync once more to deal with delays?
;; (db:sync-tables db:sync-tests-only db inmem)
;; (db:sync-tables db:sync-tests-only inmem refdb)
inmem)))))))
;; This routine creates the db if not already present. It is only called if the db is not already ls opened
;;
(define (db:open-main dbstruct) ;; (conc *toppath* "/megatest.db") (car *configinfo*)))
(let ((mdb (dbr:dbstruct-get-main dbstruct))) ;; RA => Returns the first reference in dbstruct
(if mdb
mdb
(begin
(mutex-lock! *rundb-mutex*)
(let* ((dbpath (db:dbfile-path 0))
(dbexists (file-exists? dbpath))
(db (db:lock-create-open dbpath db:initialize-main-db))
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;; this test is younger, store it in the hash
(hash-table-set! tests-hash full-testname testdat))))
results)
(if (null? tal)
(map cdr (hash-table->alist tests-hash)) ;; return a list of the most recent tests
(loop (car tal)(cdr tal))))))))))
(define (db:delay-if-busy dbdat #!key (count 6))
(if (not (configf:lookup *configdat* "server" "delay-on-busy"))
(and dbdat (db:dbdat-get-db dbdat))
(if dbdat
(let* ((dbpath (db:dbdat-get-path dbdat))
(db (db:dbdat-get-db dbdat)) ;; we'll return this so (db:delay--if-busy can be called inline
(dbfj (conc dbpath "-journal")))
(if (handle-exceptions
exn
(begin
(debug:print-info 0 *default-log-port* "WARNING: failed to test for existance of " dbfj)
(thread-sleep! 1)
(db:delay-if-busy count (- count 1)))
(file-exists? dbfj))
(case count
((6)
(thread-sleep! 0.2)
(db:delay-if-busy count: 5))
((5)
(thread-sleep! 0.4)
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;; this test is younger, store it in the hash
(hash-table-set! tests-hash full-testname testdat))))
results)
(if (null? tal)
(map cdr (hash-table->alist tests-hash)) ;; return a list of the most recent tests
(loop (car tal)(cdr tal))))))))))
;; Function recursively checks if <db>.journal exists; if yes means db busy; call itself after delayed interval
;;
(define (db:delay-if-busy dbdat #!key (count 6))
(if (not (configf:lookup *configdat* "server" "delay-on-busy")) ;;RADT => two conditions in a if block?? also understand what config looked up
(and dbdat (db:dbdat-get-db dbdat))
(if dbdat
(let* ((dbpath (db:dbdat-get-path dbdat))
(db (db:dbdat-get-db dbdat)) ;; we'll return this so (db:delay--if-busy can be called inline
(dbfj (conc dbpath "-journal")))
(if (handle-exceptions
exn
(begin
(debug:print-info 0 *default-log-port* "WARNING: failed to test for existance of " dbfj)
(thread-sleep! 1)
(db:delay-if-busy count (- count 1))) ;; RADT => Don't we need to sent a dbstruct here?
(file-exists? dbfj))
(case count
((6)
(thread-sleep! 0.2)
(db:delay-if-busy count: 5))
((5)
(thread-sleep! 0.4)
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(db:delay-if-busy count: 1))
((1)
(thread-sleep! 6.4)
(db:delay-if-busy count: 0))
(else
(debug:print-info 0 *default-log-port* "delaying db access due to high database load.")
(thread-sleep! 12.8))))
db)
"bogus result from db:delay-if-busy")))
(define (db:test-get-records-for-index-file dbstruct run-id test-name)
(let ((res '()))
(db:with-db
dbstruct
run-id
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(db:delay-if-busy count: 1))
((1)
(thread-sleep! 6.4)
(db:delay-if-busy count: 0))
(else
(debug:print-info 0 *default-log-port* "delaying db access due to high database load.")
(thread-sleep! 12.8))))
db) ;; RADT => why does it need to return db, not #t
"bogus result from db:delay-if-busy")))
(define (db:test-get-records-for-index-file dbstruct run-id test-name)
(let ((res '()))
(db:with-db
dbstruct
run-id
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