blob: 76ede13161b85e6624836b0a49e4e1ffd549ed7c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
|
(local {: must} (require :lib.utils))
(fn get [db key else]
(local result
(must (luna.db.query db "SELECT value FROM cache WHERE key = ?"
[key])))
(or (if (and result (< 0 (# result)))
(. (. result 1) 1)
nil)
else))
(fn _set [db key value]
value
(must (luna.db.exec db "INSERT OR REPLACE INTO cache VALUES (?, ?)"
[key value]))
value)
(fn clear-tx [tx prefix]
(if (= "string" (type prefix))
(must (luna.db.exec-tx tx "DELETE FROM cache WHERE key LIKE ?"
[(.. prefix "%")]))
(must (luna.db.exec-tx tx "DELETE FROM cache" []))))
(fn wrap [db key f]
(local cached (get db key))
(if cached
cached
(let [res (f)]
(if res (_set db key res) nil))))
{: get :set _set : clear-tx : wrap}
|
