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|
;;
;; You should have received a copy of the GNU General Public License
;; along with Megatest. If not, see <http://www.gnu.org/licenses/>.
;;======================================================================
(declare (unit dbmod))
(declare (uses dbfile))
(declare (uses commonmod))
(declare (uses debugprint))
(module dbmod
*
(import scheme chicken data-structures extras)
(import (prefix sqlite3 sqlite3:)
posix typed-records srfi-18
srfi-69)
(import scheme
chicken
data-structures
extras
(prefix sqlite3 sqlite3:)
posix
typed-records
srfi-1
srfi-18
srfi-69
commonmod
dbfile
debugprint
)
(define dbcache-mode (make-parameter 'tmp)) ;; 'inmem, 'tmp
;; NOTE: This returns only the name "1.db", "main.db", not the path
;;
(define (dbmod:run-id->dbfname run-id)
(conc (dbfile:run-id->dbnum run-id)".db"))
(define (dbmod:get-dbdir dbstruct)
(let* ((areapath (dbr:dbstruct-areapath dbstruct))
(dbdir (conc areapath"/.mtdb")))
(if (and (file-write-access? areapath)
(not (file-exists? dbdir)))
(create-directory dbdir))
dbdir))
(define (dbmod:run-id->full-dbfname dbstruct run-id)
(conc (dbmod:get-dbdir dbstruct
run-id
)"/"(dbmod:run-id->dbfname run-id)))
;;======================================================================
;; Read-only inmem cached direct from disk method
;;======================================================================
(define *dbmod:nfs-db-handles* (make-hash-table)) ;; dbfname -> dbstruct
;; called in rmt.scm nfs-transport-handler
(define (dbmod:nfs-get-dbstruct run-id keys init-proc areapath)
(assert areapath "FATAL: dbmod:nfs-get-dbstruct called without areapath set.")
(let* ((dbfname (dbmod:run-id->dbfname run-id))
(dbstruct (hash-table-ref/default *dbmod:nfs-db-handles* dbfname #f)))
(if dbstruct
dbstruct
(let* ((newdbstruct (dbmod:open-dbmoddb areapath run-id dbfname init-proc keys syncdir: 'fromdisk)))
(hash-table-set! *dbmod:nfs-db-handles* dbfname newdbstruct)
newdbstruct))))
;;======================================================================
;; The inmem one-db file per server method goes in here
;;======================================================================
(define (dbmod:with-db dbstruct run-id r/w proc params)
(let* ((use-mutex (> *api-process-request-count* 50))
(dbdat (dbmod:open-db dbstruct run-id (dbfile:db-init-proc)))
(dbh (dbr:dbdat-dbh dbdat)) ;; this will be the inmem handle
(dbfile (dbr:dbdat-dbfile dbdat)))
;; if nfs mode do a sync if delta > 2
(let* ((last-update (dbr:dbstruct-last-update dbstruct))
(sync-proc (dbr:dbstruct-sync-proc dbstruct))
(curr-secs (current-seconds)))
(if (> (- curr-secs last-update) 3)
(begin
(sync-proc last-update)
(dbr:dbstruct-last-update-set! dbstruct curr-secs))))
(if use-mutex (mutex-lock! *db-with-db-mutex*))
(let* ((res (apply proc dbdat dbh params)))
(if use-mutex (mutex-unlock! *db-with-db-mutex*))
res)))
(define (db:with-db dbstruct run-id r/w proc . params)
(dbmod:with-db dbstruct run-id r/w proc params))
(define (dbmod:open-inmem-db init-proc #!optional (dbfullname #f))
(let* ((db (if dbfullname
(dbmod:safely-open-db dbfullname init-proc #t)
(sqlite3:open-database ":memory:")))
(handler (sqlite3:make-busy-timeout 3600)))
(sqlite3:set-busy-handler! db handler)
(init-proc db)
db))
(define (dbmod:open-db dbstruct run-id dbinit)
(or (dbr:dbstruct-dbdat dbstruct)
(let* ((dbdat (make-dbr:dbdat
dbfile: (dbr:dbstruct-dbfile dbstruct)
dbh: (dbr:dbstruct-inmem dbstruct)
)))
(dbr:dbstruct-dbdat-set! dbstruct dbdat)
dbdat)))
(define (dbmod:need-on-disk-db-handle)
(case (dbfile:cache-method)
((none tmp) #t)
((inmem)
(case (dbfile:sync-method)
((original) #t)
((attach) #t) ;; we need it to force creation of the on-disk file - FIXME
(else
(debug:print 0 *default-log-port* "Unknown dbfile:sync-method setting: "
(dbfile:sync-method)))))
(else
(debug:print 0 *default-log-port* "Unknown dbfile:cache-method setting: "
(dbfile:cache-method))
#f)))
(define (dbmod:safely-open-db dbfullname init-proc write-access)
(dbfile:with-simple-file-lock
(conc dbfullname".lock")
(lambda ()
(let* ((db (sqlite3:open-database dbfullname))
(handler (sqlite3:make-busy-timeout 136000)))
(sqlite3:set-busy-handler! db handler)
(if write-access
(init-proc db))
db))))
(define *sync-in-progress* #f)
;; Open the inmem db and the on-disk db
;; populate the inmem db with data
;;
;; Updates fields in dbstruct
;; Returns dbstruct
;;
;; * This routine creates the db if not found
;; * Probably can get rid of the dbstruct-in
;;
(define (dbmod:open-dbmoddb areapath run-id dbfname-in init-proc keys
#!key (dbstruct-in #f)
(syncdir 'todisk))
(let* ((dbstruct (or dbstruct-in (make-dbr:dbstruct areapath: areapath)))
(dbfname (or dbfname-in (dbmod:run-id->dbfname run-id)))
(dbpath (dbmod:get-dbdir dbstruct)) ;; directory where all the .db files are kept
(dbfullname (conc dbpath"/"dbfname)) ;; (dbmod:run-id->full-dbfname dbstruct run-id))
(dbexists (file-exists? dbfullname))
(tmpdir (conc "/tmp/"(current-user-name)))
(tmpdb (let* ((fname (conc tmpdir"/"(current-process-id)"-"dbfname)))
(if (not (file-exists? tmpdir))(create-directory tmpdir))
;; check if tmpdb already exists, either delete it or
;; add something to the name
fname))
(inmem (dbmod:open-inmem-db init-proc
(if (eq? (dbcache-mode) 'inmem)
#f
tmpdb)
))
(write-access (file-write-access? dbpath))
(db (dbmod:safely-open-db dbfullname init-proc write-access))
(tables (db:sync-all-tables-list keys)))
(if (not (and (sqlite3:database? inmem)
(sqlite3:database? db)))
(begin
(debug:print 0 *default-log-port* "ERROR: Failed to properly open "dbfname-in", exiting immediately.")
(exit)))
;; (assert (sqlite3:database? inmem) "FATAL: open-dbmoddb: inmem is not a db")
;; (assert (sqlite3:database? db) "FATAL: open-dbmoddb: db is not a db")
(dbr:dbstruct-inmem-set! dbstruct inmem)
(dbr:dbstruct-ondiskdb-set! dbstruct db)
(dbr:dbstruct-dbfile-set! dbstruct dbfullname)
(dbr:dbstruct-dbfname-set! dbstruct dbfname)
(dbr:dbstruct-sync-proc-set! dbstruct
(lambda (last-update)
(if *sync-in-progress*
(debug:print 0 *default-log-port* "WARNING: overlapping calls to sync to disk")
(begin
(set! *sync-in-progress* #t)
(dbmod:sync-gasket tables last-update inmem db
dbfullname syncdir)
(thread-sleep! 0.5) ;; ensure at least 1/2 second down time between sync calls
(set! *sync-in-progress* #f)))))
;; (dbmod:sync-tables tables #f db inmem)
;; (if db
(dbmod:sync-gasket tables #f inmem db dbfullname 'fromdest) ;; ) ;; load into inmem
(dbr:dbstruct-last-update-set! dbstruct (current-seconds)) ;; should this be offset back in time by one second?
dbstruct))
;; (if (eq? syncdir 'todisk) ;; sync to disk normally, sync from in dashboard
;; (dbmod:sync-tables tables last-update inmem db)
;; (dbmod:sync-tables tables last-update db inmem))))
(define (db:run-id->dbname run-id)
((number? run-id)(conc run-id ".db"))
((not run-id) "main.db")
(else run-id)))
;;======================================================================
;; hash of hashs
;;======================================================================
(define (db:hoh-set! dat key1 key2 val)
(let* ((subhash (hash-table-ref/default dat key1 #f)))
(if subhash
(hash-table-set! subhash key2 val)
(begin
(hash-table-set! dat key1 (make-hash-table))
(db:hoh-set! dat key1 key2 val)))))
(define (db:hoh-get dat key1 key2)
(let* ((subhash (hash-table-ref/default dat key1 #f)))
(and subhash
(hash-table-ref/default subhash key2 #f))))
(define (db:get-var dbstruct var)
(let* ((res #f))
(db:with-db
dbstruct #f #f ;; for the moment vars are only stored in main.db
(lambda (dbdat db)
(sqlite3:for-each-row
(lambda (val)
(set! res val))
db
"SELECT val FROM metadat WHERE var=?;" var)
;; convert to number if can
(if (string? res)
(let ((valnum (string->number res)))
(if valnum (set! res valnum))))
res))))
(define (db:inc-var dbstruct var)
(db:with-db dbstruct #f #t
(lambda (dbdat db)
(sqlite3:execute db "UPDATE metadat SET val=val+1 WHERE var=?;" var))))
(define (db:dec-var dbstruct var)
(db:with-db dbstruct #f #t
(lambda (dbdat db)
(sqlite3:execute db "UPDATE metadat SET val=val-1 WHERE var=?;" var))))
;; This was part of db:get-var. It was used to estimate the load on
;; the database files.
;;
;; scale by 10, average with current value.
;; (set! *global-delta* (/ (+ *global-delta* (* (- (current-milliseconds) start-ms)
;; (if throttle throttle 0.01)))
;; 2))
;; (if (> (abs (- *last-global-delta-printed* *global-delta*)) 0.08) ;; don't print all the time, only if it changes a bit
;; (begin
;; (debug:print-info 4 *default-log-port* "launch throttle factor=" *global-delta*)
;; (set! *last-global-delta-printed* *global-delta*)))
(define (db:set-var dbstruct var val)
(db:with-db dbstruct #f #t
(lambda (dbdat db)
(sqlite3:execute (db:get-cache-stmth dbdat db "INSERT OR REPLACE INTO metadat (var,val) VALUES (?,?);")
var val))))
(define (db:add-var dbstruct var val)
(db:with-db dbstruct #f #t
(lambda (dbdat db)
(sqlite3:execute (db:get-cache-stmth dbdat db "UPDATE metadat SET val=val+? WHERE var=?;") val var))))
(define (db:del-var dbstruct var)
(db:with-db dbstruct #f #t
(lambda (dbdat db)
(sqlite3:execute (db:get-cache-stmth dbdat db "DELETE FROM metadat WHERE var=?;") var))))
)
|