5.4 Cache Table
| (require web-server/private/cache-table) | |
| package: web-server-lib | |
This module provides a set of caching hash table
functions.
procedure
Constructs a cache-table.
procedure
(cache-table-lookup! ct id mk) → any/c
ct : cache-table? id : symbol? mk : (-> any/c)
Looks up id in ct. If it is not present, then mk is
called to construct the value and add it to ct.
procedure
(cache-table-clear! ct [entry-ids finalize]) → void?
ct : cache-table? entry-ids : (or/c false/c (listof symbol?)) = #f finalize : (-> any/c void?) = void
If entry-ids is #f, clears all entries in ct.
Otherwise, clears only the entries with keys in entry-ids.
The procedure finalize is invoked on each entry before it is cleared.
Changed in version 1.3 of package web-server-lib: Added optional argument for list of entry keys.
Changed in version 1.3: Added optional argument for finalizer procedure.
procedure
(cache-table? v) → boolean?
v : any/c
Determines if v is a cache table.