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dodb
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Deletion works.

draft
Karchnu 2022-10-13 02:14:31 +02:00
parent 47a50e981a
commit b29badbad0
1 changed files with 32 additions and 5 deletions
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37
src/dodb.cl
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@ -108,6 +108,9 @@
:hard nil)
))
(defun db/index/del (database index-name object)
(delete-file (db/index/get-symlink-path database index-name object)))
; Example: database "color" object
; -> "./storage/cars/partitions/by_color/Red/0000000015".
(defun db/partition/get-symlink-path (database partition-name object file-name)
@ -133,6 +136,9 @@
:target (concatenate 'string "../../../data/" file-name)
:hard nil)))
(defun db/partition/del (database partition-name object file-basename)
(delete-file (db/partition/get-symlink-path database partition-name object file-basename)))
; example: db-path/indexes/by_name/
(defun db/new-index (database attribute-name)
; Create a directory for the indexes.
@ -170,7 +176,7 @@
(number->filename (db-current-index database)))
; Example: {db-path}/data/000000000000018
(defun db/add/new-data-filepath (database file-name)
(defun get-filepath (database file-name)
(concatenate 'string (db-path database) "/data/" file-name))
(defun db/add (database object)
@ -180,7 +186,7 @@
; write object to file
(util:write-object-to-file
object
(db/add/new-data-filepath database file-name))
(get-filepath database file-name))
; handle indexes
(loop for index in (db-indexes database)
@ -194,6 +200,25 @@
; database.data[database.current-index] = object
(setf (gethash (db-current-index database) (db-data database)) object))
; TODO
(defun db/del (database object-index)
(let ((file-basename (number->filename object-index))
(object (gethash object-index (db-data database))))
; remove data file
(delete-file (get-filepath database file-basename))
; handle indexes
(loop for index in (db-indexes database)
do (db/index/del database index object))
; TODO
; handle partitions
(loop for partition in (db-partitions database)
do (db/partition/del database partition object file-basename))
; remove in-memory data
(remhash object-index (db-data database))))
; Search for the data from the FS.
; TODO: get the hash index, too.
(defun db/search/fs/get-by-index (database index-name value)
@ -232,9 +257,11 @@
(defparameter cars (db/new "vehicle" "./storage/cars/"))
;(db/add cars (make-vehicle :name "Corvet" :color "Red"))
;(db/add cars (make-vehicle :name "Ferrari" :color "Red"))
;(db/add cars (make-vehicle :name "Deudeuch" :color "Beige"))
;(db/add cars (make-vehicle :name "Corvet" :color "Red"))
;(db/add cars (make-vehicle :name "Ferrari" :color "Red"))
;(db/add cars (make-vehicle :name "Deudeuch" :color "Beige"))
;(db/add cars (make-vehicle :name "BMW" :color "Blue"))
;(db/add cars (make-vehicle :name "Suzuki Wagon" :color "Blue"))
(db/new-index cars "name")
(db/new-partition cars "color")