prosody-modules
98427ed3d53f
mod_storage_gdbm/mod_storage_gdbm.lua

Find changesets by keywords by author, files, the commit message, revision number or hash, or revset expression.

Software / code / prosody-modules

Annotate

mod_storage_gdbm/mod_storage_gdbm.lua @ 1631:98427ed3d53f

mod_storage_gdbm: Update archive metadata only if data write succeeds
author Kim Alvefur <zash@zash.se>
date Wed, 25 Mar 2015 17:41:13 +0100
parent 1630:0fcd63818aa1
child 1632:050d101af207
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1570
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
1 -- mod_storage_gdbm
1629
36eb0dbea7ba mod_storage_gdbm: Minor reorganization, more locals
Kim Alvefur <zash@zash.se>
parents: 1628
diff changeset
2 -- Copyright (C) 2014-2015 Kim Alvefur
1570
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
3 --
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
4 -- This file is MIT/X11 licensed.
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
5 --
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
6 -- Depends on lgdbm:
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
7 -- http://webserver2.tecgraf.puc-rio.br/~lhf/ftp/lua/#lgdbm
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
8
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
9 local gdbm = require"gdbm";
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
10 local path = require"util.paths";
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
11 local lfs = require"lfs";
1629
36eb0dbea7ba mod_storage_gdbm: Minor reorganization, more locals
Kim Alvefur <zash@zash.se>
parents: 1628
diff changeset
12 local st = require"util.stanza";
1596
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
13 local uuid = require"util.uuid".generate;
1629
36eb0dbea7ba mod_storage_gdbm: Minor reorganization, more locals
Kim Alvefur <zash@zash.se>
parents: 1628
diff changeset
14
1593
d9f3c66ea938 mod_storage_gdbm: Use require directly instead of util.import (which is not available in prosodyctl, breaks adduser etc)
Kim Alvefur <zash@zash.se>
parents: 1570
diff changeset
15 local serialization = require"util.serialization";
d9f3c66ea938 mod_storage_gdbm: Use require directly instead of util.import (which is not available in prosodyctl, breaks adduser etc)
Kim Alvefur <zash@zash.se>
parents: 1570
diff changeset
16 local serialize = serialization.serialize;
d9f3c66ea938 mod_storage_gdbm: Use require directly instead of util.import (which is not available in prosodyctl, breaks adduser etc)
Kim Alvefur <zash@zash.se>
parents: 1570
diff changeset
17 local deserialize = serialization.deserialize;
1570
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
18
1629
36eb0dbea7ba mod_storage_gdbm: Minor reorganization, more locals
Kim Alvefur <zash@zash.se>
parents: 1628
diff changeset
19 local g_set, g_get, g_del = gdbm.replace, gdbm.fetch, gdbm.delete;
36eb0dbea7ba mod_storage_gdbm: Minor reorganization, more locals
Kim Alvefur <zash@zash.se>
parents: 1628
diff changeset
20 local g_first, g_next = gdbm.firstkey, gdbm.nextkey;
36eb0dbea7ba mod_storage_gdbm: Minor reorganization, more locals
Kim Alvefur <zash@zash.se>
parents: 1628
diff changeset
21
36eb0dbea7ba mod_storage_gdbm: Minor reorganization, more locals
Kim Alvefur <zash@zash.se>
parents: 1628
diff changeset
22 local t_remove = table.remove;
36eb0dbea7ba mod_storage_gdbm: Minor reorganization, more locals
Kim Alvefur <zash@zash.se>
parents: 1628
diff changeset
23
1628
5e4b37b9cde1 mod_storage_gdbm: Fix traceback if query is nil or no metadata exists
Kim Alvefur <zash@zash.se>
parents: 1604
diff changeset
24 local empty = {};
5e4b37b9cde1 mod_storage_gdbm: Fix traceback if query is nil or no metadata exists
Kim Alvefur <zash@zash.se>
parents: 1604
diff changeset
25
1596
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
26 local function id(v) return v; end
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
27
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
28 local function is_stanza(s)
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
29 return getmetatable(s) == st.stanza_mt;
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
30 end
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
31
1629
36eb0dbea7ba mod_storage_gdbm: Minor reorganization, more locals
Kim Alvefur <zash@zash.se>
parents: 1628
diff changeset
32 local function t(c, a, b)
36eb0dbea7ba mod_storage_gdbm: Minor reorganization, more locals
Kim Alvefur <zash@zash.se>
parents: 1628
diff changeset
33 if c then return a; end return b;
1596
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
34 end
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
35
1570
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
36 local base_path = path.resolve_relative_path(prosody.paths.data, module.host);
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
37 lfs.mkdir(base_path);
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
38
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
39 local cache = {};
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
40
1595
6288591d5edf mod_storage_gdbm: Prepare for supporting multiple store types
Kim Alvefur <zash@zash.se>
parents: 1593
diff changeset
41 local keyval = {};
6288591d5edf mod_storage_gdbm: Prepare for supporting multiple store types
Kim Alvefur <zash@zash.se>
parents: 1593
diff changeset
42 local keyval_mt = { __index = keyval, suffix = ".db" };
1570
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
43
1595
6288591d5edf mod_storage_gdbm: Prepare for supporting multiple store types
Kim Alvefur <zash@zash.se>
parents: 1593
diff changeset
44 function keyval:set(user, value)
1630
0fcd63818aa1 mod_storage_gdbm: Make write operation delete data when passed 'nil' as value instead of storing a literal "nil" string
Kim Alvefur <zash@zash.se>
parents: 1629
diff changeset
45 if type(value) == "table" and next(value) == nil then
0fcd63818aa1 mod_storage_gdbm: Make write operation delete data when passed 'nil' as value instead of storing a literal "nil" string
Kim Alvefur <zash@zash.se>
parents: 1629
diff changeset
46 value = nil;
0fcd63818aa1 mod_storage_gdbm: Make write operation delete data when passed 'nil' as value instead of storing a literal "nil" string
Kim Alvefur <zash@zash.se>
parents: 1629
diff changeset
47 end
0fcd63818aa1 mod_storage_gdbm: Make write operation delete data when passed 'nil' as value instead of storing a literal "nil" string
Kim Alvefur <zash@zash.se>
parents: 1629
diff changeset
48 if value ~= nil then
0fcd63818aa1 mod_storage_gdbm: Make write operation delete data when passed 'nil' as value instead of storing a literal "nil" string
Kim Alvefur <zash@zash.se>
parents: 1629
diff changeset
49 value = serialize(value);
0fcd63818aa1 mod_storage_gdbm: Make write operation delete data when passed 'nil' as value instead of storing a literal "nil" string
Kim Alvefur <zash@zash.se>
parents: 1629
diff changeset
50 end
0fcd63818aa1 mod_storage_gdbm: Make write operation delete data when passed 'nil' as value instead of storing a literal "nil" string
Kim Alvefur <zash@zash.se>
parents: 1629
diff changeset
51 local ok, err = (value and g_set or g_del)(self._db, user or "@", value);
1570
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
52 if not ok then return nil, err; end
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
53 return true;
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
54 end
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
55
1595
6288591d5edf mod_storage_gdbm: Prepare for supporting multiple store types
Kim Alvefur <zash@zash.se>
parents: 1593
diff changeset
56 function keyval:get(user)
1629
36eb0dbea7ba mod_storage_gdbm: Minor reorganization, more locals
Kim Alvefur <zash@zash.se>
parents: 1628
diff changeset
57 local data, err = g_get(self._db, user or "@");
1570
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
58 if not data then return nil, err; end
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
59 return deserialize(data);
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
60 end
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
61
1596
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
62 local archive = {};
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
63 local archive_mt = { __index = archive, suffix = ".adb" };
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
64
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
65 archive.get = keyval.get;
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
66 archive.set = keyval.set;
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
67
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
68 function archive:append(username, key, when, with, value)
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
69 key = key or uuid();
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
70 local meta = self:get(username);
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
71 if not meta then
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
72 meta = {};
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
73 end
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
74 local i = meta[key] or #meta+1;
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
75 local type;
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
76 if is_stanza(value) then
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
77 type, value = "stanza", st.preserialize(value);
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
78 end
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
79 meta[i] = { key = key, when = when, with = with, type = type };
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
80 meta[key] = i;
1631
98427ed3d53f mod_storage_gdbm: Update archive metadata only if data write succeeds
Kim Alvefur <zash@zash.se>
parents: 1630
diff changeset
81 local ok, err = self:set(key, value);
1596
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
82 if not ok then return nil, err; end
1631
98427ed3d53f mod_storage_gdbm: Update archive metadata only if data write succeeds
Kim Alvefur <zash@zash.se>
parents: 1630
diff changeset
83 ok, err = self:set(username, meta);
1596
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
84 if not ok then return nil, err; end
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
85 return key;
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
86 end
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
87
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
88 local deserialize = {
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
89 stanza = st.deserialize;
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
90 };
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
91
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
92 function archive:find(username, query)
1628
5e4b37b9cde1 mod_storage_gdbm: Fix traceback if query is nil or no metadata exists
Kim Alvefur <zash@zash.se>
parents: 1604
diff changeset
93 query = query or empty_query;
5e4b37b9cde1 mod_storage_gdbm: Fix traceback if query is nil or no metadata exists
Kim Alvefur <zash@zash.se>
parents: 1604
diff changeset
94 local meta = self:get(username) or empty;
1596
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
95 local r = query.reverse;
1629
36eb0dbea7ba mod_storage_gdbm: Minor reorganization, more locals
Kim Alvefur <zash@zash.se>
parents: 1628
diff changeset
96 local d = t(r, -1, 1);
36eb0dbea7ba mod_storage_gdbm: Minor reorganization, more locals
Kim Alvefur <zash@zash.se>
parents: 1628
diff changeset
97 local s = meta[t(r, query.before, query.after)];
1603
1fbec16996f5 mod_storage_gdbm: Add support for 'limit' query parameter
Kim Alvefur <zash@zash.se>
parents: 1602
diff changeset
98 local limit = query.limit;
1596
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
99 if s then
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
100 s = s + d;
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
101 else
1629
36eb0dbea7ba mod_storage_gdbm: Minor reorganization, more locals
Kim Alvefur <zash@zash.se>
parents: 1628
diff changeset
102 s = t(r, #meta, 1)
1596
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
103 end
1629
36eb0dbea7ba mod_storage_gdbm: Minor reorganization, more locals
Kim Alvefur <zash@zash.se>
parents: 1628
diff changeset
104 local e = t(r, 1, #meta);
1603
1fbec16996f5 mod_storage_gdbm: Add support for 'limit' query parameter
Kim Alvefur <zash@zash.se>
parents: 1602
diff changeset
105 local c = 0;
1596
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
106 return function ()
1603
1fbec16996f5 mod_storage_gdbm: Add support for 'limit' query parameter
Kim Alvefur <zash@zash.se>
parents: 1602
diff changeset
107 if limit and c >= limit then return end
1596
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
108 local item, value;
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
109 for i = s, e, d do
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
110 item = meta[i];
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
111 if (not query.with or item.with == query.with)
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
112 and (not query.start or item.when >= query.start)
1604
53052a610c67 mod_storage_gdbm: Fix comparison of 'end'
Kim Alvefur <zash@zash.se>
parents: 1603
diff changeset
113 and (not query["end"] or item.when <= query["end"]) then
1603
1fbec16996f5 mod_storage_gdbm: Add support for 'limit' query parameter
Kim Alvefur <zash@zash.se>
parents: 1602
diff changeset
114 s = i + d; c = c + 1;
1596
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
115 value = self:get(item.key);
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
116 return item.key, (deserialize[item.type] or id)(value), item.when, item.with;
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
117 end
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
118 end
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
119 end
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
120 end
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
121
1595
6288591d5edf mod_storage_gdbm: Prepare for supporting multiple store types
Kim Alvefur <zash@zash.se>
parents: 1593
diff changeset
122 local drivers = {
6288591d5edf mod_storage_gdbm: Prepare for supporting multiple store types
Kim Alvefur <zash@zash.se>
parents: 1593
diff changeset
123 keyval = keyval_mt;
1596
b362e6c00fd1 mod_storage_gdbm: Add archive support
Kim Alvefur <zash@zash.se>
parents: 1595
diff changeset
124 archive = archive_mt;
1595
6288591d5edf mod_storage_gdbm: Prepare for supporting multiple store types
Kim Alvefur <zash@zash.se>
parents: 1593
diff changeset
125 }
6288591d5edf mod_storage_gdbm: Prepare for supporting multiple store types
Kim Alvefur <zash@zash.se>
parents: 1593
diff changeset
126
1570
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
127 function open(_, store, typ)
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
128 typ = typ or "keyval";
1595
6288591d5edf mod_storage_gdbm: Prepare for supporting multiple store types
Kim Alvefur <zash@zash.se>
parents: 1593
diff changeset
129 local driver_mt = drivers[typ];
6288591d5edf mod_storage_gdbm: Prepare for supporting multiple store types
Kim Alvefur <zash@zash.se>
parents: 1593
diff changeset
130 if not driver_mt then
1570
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
131 return nil, "unsupported-store";
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
132 end
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
133
1595
6288591d5edf mod_storage_gdbm: Prepare for supporting multiple store types
Kim Alvefur <zash@zash.se>
parents: 1593
diff changeset
134 local db_path = path.join(base_path, store) .. driver_mt.suffix;
1570
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
135
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
136 local db = cache[db_path];
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
137 if not db then
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
138 db = assert(gdbm.open(db_path, "c"));
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
139 cache[db_path] = db;
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
140 end
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
141 return setmetatable({ _db = db; _path = db_path; store = store, typ = type }, driver_mt);
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
142 end
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
143
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
144 function module.unload()
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
145 for path, db in pairs(cache) do
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
146 gdbm.sync(db);
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
147 gdbm.close(db);
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
148 end
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
149 end
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
150
67fafebdceb7 mod_storage_gdbm: Storage backend based on lgdbm
Kim Alvefur <zash@zash.se>
parents:
diff changeset
151 module:provides"storage";