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draft
kimory 2022-10-18 20:10:25 +02:00
parent 1ce7d71f8d
commit b3a50358ab
2 changed files with 23 additions and 21 deletions
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3
TODO.md
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@ -1,9 +1,10 @@
- Warning when indexes overlap (data add or update)
- Data integrity on update (create temporary file with new data, rename old data file, move temporary file, remove old data file)
- Handle errors (such as permissions) in an explicit way
- Grooming (create a consistent and convenient API)
- Grooming (create a consistent and convenient API, comments)
- Improve data search
- Check for TODOs
- For indexes and partitions: check that the structure attribute exists.
- Verify names of indexes and partitions: names are directly related to directory paths.
- db/data-filepath instead of get-filepath.
- database -> db-path

41
src/main.lisp
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@ -77,13 +77,13 @@
(t (format nil "~A" object-attribute)))))
(concatenate 'string dbpath "/partitions/by_" name "/" value "/")))
; Example: database "name" object -> "./storage/cars/indexes/by_name/Corvet".
; Example: dbpath "name" #'vehicle-name object -> "./storage/cars/indexes/by_name/Corvet".
(defun db/index/get-symlink-path (dbpath index-name fsymbol object)
(concatenate 'string
(db/index/get-directory-path dbpath index-name)
(funcall fsymbol object)))
; Example: database "name" object "0000000015"
; Example: dbpath "name" #'vehicle-name object "0000000015"
; -> (osicat:make-link "./storage/cars/indexes/by_name/Corvet"
; :target "../../data/0000000015"
; :hard nil)
@ -98,7 +98,7 @@
(defun db/index/del (dbpath index-name fsymbol object)
(delete-file (db/index/get-symlink-path dbpath index-name fsymbol object)))
; Example: database "color" object
; Example: dbpath "color" #'vehicle-color object
; -> "./storage/cars/partitions/by_color/Red/0000000015".
(defun db/partition/get-symlink-path (dbpath partition-name fsymbol object file-name)
(concatenate 'string
@ -108,7 +108,7 @@
; example: "0000000015"
file-name))
; Example: database "color" object "0000000015"
; Example: dbpath "color" #'vehicle-color object "0000000015"
; -> (osicat:make-link "./storage/cars/partitions/by_color/Red/0000000015"
; :target "../../../data/0000000015"
; :hard nil)
@ -126,21 +126,22 @@
(defun db/partition/del (dbpath partition-name fsymbol object file-basename)
(delete-file (db/partition/get-symlink-path dbpath partition-name fsymbol object file-basename)))
; example: db-path/indexes/by_name/
; Example: db-path/indexes/by_name/
(defun db/new-index (database attribute-name fsymbol)
; Create a directory for the indexes.
(ensure-directories-exist
(concatenate 'string (db-path database) "/indexes/by_" attribute-name "/"))
; Add this new index to the list.
(setf (gethash attribute-name (db-indexes database)) fsymbol)
; Generate index for all DB elements.
(maphash #'(lambda (number element)
(handler-case (db/index/new (db-path database) attribute-name fsymbol element (number->filename number))
(OSICAT-POSIX:EEXIST ()
(format t "db/new-index: symlink already exists, ignoring.~&"))))
(db-data database)))
(let ((dbpath (db-path database)))
; create a directory for the indexes
(ensure-directories-exist
(concatenate 'string dbpath "/indexes/by_" attribute-name "/"))
; add this new index to the list
(setf (gethash attribute-name (db-indexes database)) fsymbol)
; generate index for all DB elements
(maphash #'(lambda (number object)
(handler-case (db/index/new dbpath attribute-name fsymbol object (number->filename number))
(OSICAT-POSIX:EEXIST ()
(format t "db/new-index: symlink already exists, ignoring.~&"))))
(db-data database))))
(defun db/partition/update (dbpath partition-name fsymbol object file-name old-object)
(let ((new-value (funcall fsymbol object))
@ -152,7 +153,7 @@
; create new partition
(db/partition/new dbpath partition-name fsymbol object file-name)))))
; example: db-path/partitions/by_color/
; Example: db-path/partitions/by_color/
(defun db/new-partition (database attribute-name fsymbol)
(let (dbpath (db-path database))
; create a directory for the partitions
@ -173,7 +174,7 @@
(defun db/add/new-data-basename (database)
(number->filename (db-current-index database)))
; Example: {db-path}/data/000000000000018
; Example: {db-path}/data/000000000000018.
(defun get-filepath (dbpath file-name)
(concatenate 'string dbpath "/data/" file-name))