prosody-modules
6288591d5edf
mod_storage_gdbm/mod_storage_gdbm.lua

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mod_storage_gdbm/mod_storage_gdbm.lua @ 1595:6288591d5edf

mod_storage_gdbm: Prepare for supporting multiple store types
author Kim Alvefur <zash@zash.se>
date Sun, 25 Jan 2015 22:17:20 +0100
parent 1593:d9f3c66ea938
child 1596:b362e6c00fd1
comparison
equal deleted inserted replaced
1594:620cc035ae1e 1595:6288591d5edf
16 local base_path = path.resolve_relative_path(prosody.paths.data, module.host); 16 local base_path = path.resolve_relative_path(prosody.paths.data, module.host);
17 lfs.mkdir(base_path); 17 lfs.mkdir(base_path);
18 18
19 local cache = {}; 19 local cache = {};
20 20
21 local driver = {}; 21 local keyval = {};
22 local driver_mt = { __index = driver }; 22 local keyval_mt = { __index = keyval, suffix = ".db" };
23 23
24 function driver:set(user, value) 24 function keyval:set(user, value)
25 local ok, err = gdbm.replace(self._db, user or "@", serialize(value)); 25 local ok, err = gdbm.replace(self._db, user or "@", serialize(value));
26 if not ok then return nil, err; end 26 if not ok then return nil, err; end
27 return true; 27 return true;
28 end 28 end
29 29
30 function driver:get(user) 30 function keyval:get(user)
31 local data, err = gdbm.fetch(self._db, user or "@"); 31 local data, err = gdbm.fetch(self._db, user or "@");
32 if not data then return nil, err; end 32 if not data then return nil, err; end
33 return deserialize(data); 33 return deserialize(data);
34 end 34 end
35 35
36 local drivers = {
37 keyval = keyval_mt;
38 }
39
36 function open(_, store, typ) 40 function open(_, store, typ)
37 typ = typ or "keyval"; 41 typ = typ or "keyval";
38 if typ ~= "keyval" then 42 local driver_mt = drivers[typ];
43 if not driver_mt then
39 return nil, "unsupported-store"; 44 return nil, "unsupported-store";
40 end 45 end
41 46
42 local db_path = path.join(base_path, store) .. ".db"; 47 local db_path = path.join(base_path, store) .. driver_mt.suffix;
43 48
44 local db = cache[db_path]; 49 local db = cache[db_path];
45 if not db then 50 if not db then
46 db = assert(gdbm.open(db_path, "c")); 51 db = assert(gdbm.open(db_path, "c"));
47 cache[db_path] = db; 52 cache[db_path] = db;