Search is okay-ish.

src/dodb.cl

@@ -20,9 +20,9 @@
 (defun to-upper-case (some-string)
   (format nil "~@:(~a~)" some-string))
 
-; Example: 18 -> 000000000000018.data
+; Example: 18 -> 000000000000018
 (defun number->filename (number)
-  (format nil "~15,'0D.data" number))
+  (format nil "~15,'0D" number))
 
 ; Example: "vehicle" "color" object -> (vehicle-color object) -> "Red"
 (defun get-object-attribute (struct-name attribute-name object)
@@ -46,7 +46,7 @@
   (ensure-directories-exist (concatenate 'string path "/data/"))
   (make-db :struct-name struct-name :path path))
 
-; Example: ./storage/cars 18 -> ./storage/cars/data/000000000000018.data
+; Example: ./storage/cars 18 -> ./storage/cars/data/000000000000018
 ; USAGE: when dealing with hash keys from the in-memory db.
 ;        The hash key is the number used to build the filename.
 (defun db/data-filepath (dbpath number)
@@ -70,9 +70,9 @@
     (db/index/get-directory-path database index-name)
     (db/index/get-filename database index-name object)))
 
-; Example: database "name" object "0000000015.data"
+; Example: database "name" object "0000000015"
 ;   -> (ln "./storage/cars/indexes/by_name/Corvet"
-;          :target "../../data/0000000015.data"
+;          :target "../../data/0000000015"
 ;          :hard nil)
 (defun db/index/new (database index-name object file-name)
   (let ((symlink-path (db/index/get-symlink-path database index-name object)))
@@ -84,18 +84,18 @@
   ))
 
 ; Example: database "color" object
-;   -> "./storage/cars/partitions/by_color/Red/0000000015.data".
+;   -> "./storage/cars/partitions/by_color/Red/0000000015".
 (defun db/partition/get-symlink-path (database partition-name object file-name)
   (concatenate 'string
     (db/partition/get-directory-path database partition-name
       ; example: "Red"
       (get-object-attribute (db-struct-name database) partition-name object))
-    ; example: "0000000015.data"
+    ; example: "0000000015"
     file-name))
 
-; Example: database "color" object "0000000015.data"
-;   -> (ln "./storage/cars/partitions/by_color/Red/0000000015.data"
-;          :target "../../../data/0000000015.data"
+; Example: database "color" object "0000000015"
+;   -> (ln "./storage/cars/partitions/by_color/Red/0000000015"
+;          :target "../../../data/0000000015"
 ;          :hard nil)
 (defun db/partition/new (database partition-name object file-name)
   (let ((symlink-path
@@ -136,11 +136,11 @@
       (db/partition/new database attribute-name element (number->filename number)))
     (db-data database)))
 
-; Example: database -> "000000000000018.data".
+; Example: database -> "000000000000018".
 (defun db/add/new-data-filename (database)
   (number->filename (db-current-index database)))
 
-; Example: {db-path}/data/000000000000018.data
+; Example: {db-path}/data/000000000000018
 (defun db/add/new-data-filepath (database file-name)
   (concatenate 'string (db-path database) "/data/" file-name))
 
@@ -165,14 +165,38 @@
   ; database.data[database.current-index] = object
   (setf (gethash (db-current-index database) (db-data database)) object))
 
-; TODO: should we search for the data from the FS or in-memory?
-(defun db/get-by-index (database index-name value)
-  (util:read-object-from-file (concatenate 'string
-    (db/index/get-directory-path database index-name) "/" value)))
+(alias basename pathname-name)
 
-(defun db/get-by-partition (database name value)
-  (loop for car in (ls (db/partition/get-directory-path database name value))
-        collect (util:read-object-from-file car)))
+; Search for the data from the FS.
+; TODO: get the hash index, too.
+(defun db/search/fs/get-by-index (database index-name value)
+  (parse-integer
+    (basename
+      (osicat:read-link
+        (concatenate 'string
+          (db/index/get-directory-path database index-name) "/" value)))))
+;  (util:read-object-from-file (concatenate 'string
+;    (db/index/get-directory-path database index-name) "/" value)))
+
+; Search for the data from the FS.
+(defun db/search/fs/get-by-partition (database name value)
+  (loop for filename in (ls (db/partition/get-directory-path database name value))
+        collect (parse-integer (basename filename))))
+
+;; Search for the data from the in-memory data.
+;; TODO: get the hash index, too.
+;
+;(defun db/search/mem/get-by-index (database index-name value)
+;  (util:read-object-from-file (concatenate 'string
+;    (db/index/get-directory-path database index-name) "/" value)))
+;
+;(defun db/search/mem/get-by-partition (database name value)
+;  (loop for car in (ls (db/partition/get-directory-path database name value))
+;        collect (util:read-object-from-file car)))
+
+; By default, search on the FS.
+(alias db/get-by-index     db/search/fs/get-by-index)
+(alias db/get-by-partition db/search/fs/get-by-partition)
 
 ;
 ; TEST SCENARIO