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(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
;;======================================================================
;; NOTE: the r/w is now w/r, #t=db modified by query, #f=db NOT modified by query
(define (dbmod:with-db dbstruct run-id w/r proc params)
(let* ((use-mutex (or (and w/r ;; use the mutex on queries that modify the db and for sync to disk
(> *api-process-request-count* 5)) ;; when writes are happening throttle more
(> *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 (and (not (eq? (dbfile:cache-method) 'none)) ;; used by dashboard, no need for sync
(> (- curr-secs last-update) 5))
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(conc (dbmod:get-dbdir dbstruct
run-id
)"/"(dbmod:run-id->dbfname run-id)))
;;======================================================================
;; Read-only cachedb 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 cachedb one-db file per server method goes in here
;;======================================================================
;; NOTE: the r/w is now w/r, #t=db modified by query, #f=db NOT modified by query
(define (dbmod:with-db dbstruct run-id w/r proc params)
(let* ((use-mutex (or (and w/r ;; use the mutex on queries that modify the db and for sync to disk
(> *api-process-request-count* 5)) ;; when writes are happening throttle more
(> *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 cachedb 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 (and (not (eq? (dbfile:cache-method) 'none)) ;; used by dashboard, no need for sync
(> (- curr-secs last-update) 5))
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(let* ((res (apply proc dbdat dbh params)))
(if use-mutex (mutex-unlock! *db-with-db-mutex*))
res)))
(define (db:with-db dbstruct run-id w/r proc . params)
(dbmod:with-db dbstruct run-id w/r 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)))
;; NOT USED?
(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
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(let* ((res (apply proc dbdat dbh params)))
(if use-mutex (mutex-unlock! *db-with-db-mutex*))
res)))
(define (db:with-db dbstruct run-id w/r proc . params)
(dbmod:with-db dbstruct run-id w/r proc params))
;;
(define (dbmod:open-cachedb-db init-proc dbfullname)
(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-cachedb dbstruct)
)))
(dbr:dbstruct-dbdat-set! dbstruct dbdat)
dbdat)))
;; NOT USED?
(define (dbmod:need-on-disk-db-handle)
(case (dbfile:cache-method)
((none tmp) #t)
((cachedb)
(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
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(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
;;
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(sqlite3:set-busy-handler! db handler)
(if write-access
(init-proc db))
db))))
(define *sync-in-progress* #f)
;; Open the cachedb db and the on-disk db
;; populate the cachedb 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
;;
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(tmpdir (conc "/tmp/"(current-user-name)))
(tmpdb (let* ((fname (conc tmpdir"/" (string-translate areapath "/" ".") ;; "-"(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? (dbfile:cache-method) '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-dbtmpname-set! dbstruct tmpdb)
(dbr:dbstruct-dbfname-set! dbstruct dbfname)
(dbr:dbstruct-sync-proc-set! dbstruct
(lambda (last-update)
(if *sync-in-progress*
(debug:print 3 *default-log-port* "WARNING: overlapping calls to sync to disk")
(let* ((sync-cmd (conc "megatest -db2db -from "tmpdb" -to "dbfullname"&"))
(synclock-file (conc dbfullname".sync-lock")))
;; (mutex-lock! *db-with-db-mutex*) ;; this mutex is used when overloaded or during a query that modifies the db
;; (if (eq? (dbfile:cache-method) 'inmem)
;; (dbmod:sync-gasket tables last-update inmem db
;; dbfullname syncdir keys)
(if (< (file-modification-time tmpdb)
(file-modification-time dbfullname))
(debug:print 0 *default-log-port* "Skipping sync, "tmpdb" older than "dbfullname)
(if (file-exists? synclock-file)
(debug:print 0 *default-log-port* "Skipping sync, lockfile "synclock-file" found.")
(thread-start! (make-thread
(lambda ()
(set! *sync-in-progress* #t)
(debug:print-info "Running "sync-cmd)
(system sync-cmd)
;; (mutex-unlock! *db-with-db-mutex*)
;; (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 keys) ;; ) ;; 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))))
;;
;; direction: 'fromdest 'todest
;;
(define (dbmod:sync-gasket tables last-update inmem dbh dbfname direction keys)
(assert (sqlite3:database? inmem) "FATAL: sync-gasket: inmem is not a db")
(assert (sqlite3:database? inmem) "FATAL: sync-gasket: dbh is not a db")
(debug:print-info 0 *default-log-port* "dbmod:sync-gasket called with sync-method="(dbfile:sync-method))
(case (dbfile:sync-method)
((none) #f)
((attach)
(dbmod:attach-sync tables inmem dbfname direction))
((newsync)
(dbmod:new-sync tables inmem dbh dbfname direction))
(else
(case direction
((todisk) ;; i.e. from the cache db to the mtrah db
(dbmod:sync-tables tables last-update keys inmem dbh))
(else
(dbmod:sync-tables tables last-update keys dbh inmem))))))
(define (dbmod:close-db dbstruct)
;; do final sync to disk file
;; (do-sync ...)
(sqlite3:finalize! (dbr:dbstruct-ondiskdb dbstruct)))
;;======================================================================
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(tmpdir (conc "/tmp/"(current-user-name)))
(tmpdb (let* ((fname (conc tmpdir"/" (string-translate areapath "/" ".") ;; "-"(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))
(cachedb (dbmod:open-cachedb-db init-proc
;; (if (eq? (dbfile:cache-method) 'cachedb)
;; #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? cachedb)
(sqlite3:database? db)))
(begin
(debug:print 0 *default-log-port* "ERROR: Failed to properly open "dbfname-in", exiting immediately.")
(exit))) ;; (assert (sqlite3:database? cachedb) "FATAL: open-dbmoddb: cachedb is not a db")
;; (assert (sqlite3:database? db) "FATAL: open-dbmoddb: db is not a db")
(dbr:dbstruct-cachedb-set! dbstruct cachedb)
(dbr:dbstruct-ondiskdb-set! dbstruct db)
(dbr:dbstruct-dbfile-set! dbstruct dbfullname)
(dbr:dbstruct-dbtmpname-set! dbstruct tmpdb)
(dbr:dbstruct-dbfname-set! dbstruct dbfname)
(dbr:dbstruct-sync-proc-set! dbstruct
(lambda (last-update)
(if *sync-in-progress*
(debug:print 3 *default-log-port* "WARNING: overlapping calls to sync to disk")
(let* ((sync-cmd (conc "megatest -db2db -from "tmpdb" -to "dbfullname"&"))
(synclock-file (conc dbfullname".sync-lock")))
;; (mutex-lock! *db-with-db-mutex*) ;; this mutex is used when overloaded or during a query that modifies the db
;; (if (eq? (dbfile:cache-method) 'cachedb)
;; (dbmod:sync-gasket tables last-update cachedb db
;; dbfullname syncdir keys)
(if (< (file-modification-time tmpdb)
(file-modification-time dbfullname))
(debug:print 0 *default-log-port* "Skipping sync, "tmpdb" older than "dbfullname)
(if (file-exists? synclock-file)
(debug:print 0 *default-log-port* "Skipping sync, lockfile "synclock-file" found.")
(thread-start! (make-thread
(lambda ()
(set! *sync-in-progress* #t)
(debug:print-info "Running "sync-cmd)
(system sync-cmd)
;; (mutex-unlock! *db-with-db-mutex*)
;; (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 cachedb)
;; (if db
(dbmod:sync-gasket tables #f cachedb db dbfullname 'fromdest keys) ;; ) ;; load into cachedb
(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 cachedb db)
;; (dbmod:sync-tables tables last-update db cachedb))))
;;
;; direction: 'fromdest 'todest
;;
(define (dbmod:sync-gasket tables last-update cachedb dbh dbfname direction keys)
(assert (sqlite3:database? cachedb) "FATAL: sync-gasket: cachedb is not a db")
(assert (sqlite3:database? cachedb) "FATAL: sync-gasket: dbh is not a db")
(debug:print-info 0 *default-log-port* "dbmod:sync-gasket called with sync-method="(dbfile:sync-method))
(case (dbfile:sync-method)
((none) #f)
((attach)
(dbmod:attach-sync tables cachedb dbfname direction))
((newsync)
(dbmod:new-sync tables cachedb dbh dbfname direction))
(else
(case direction
((todisk) ;; i.e. from the cache db to the mtrah db
(dbmod:sync-tables tables last-update keys cachedb dbh))
(else
(dbmod:sync-tables tables last-update keys dbh cachedb))))))
(define (dbmod:close-db dbstruct)
;; do final sync to disk file
;; (do-sync ...)
(sqlite3:finalize! (dbr:dbstruct-ondiskdb dbstruct)))
;;======================================================================
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