prosody
2387f35db5c8
core/storagemanager.lua

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

Software / code / prosody

Annotate

core/storagemanager.lua @ 3401:2387f35db5c8

storagemanager: Initial commit.
author Waqas Hussain <waqas20@gmail.com>
date Fri, 23 Jul 2010 23:09:58 +0500
child 3403:b89680015b7b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
3401
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
1
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
2 local error = error;
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
3 local setmetatable = setmetatable;
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
4
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
5 local config = require "core.configmanager";
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
6 local datamanager = require "util.datamanager";
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
7 local multitable = require "util.multitable";
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
8 local modulemanager = require "core.modulemanager";
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
9 local hosts = hosts;
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
10 local log = require "util.logger".init("storagemanager");
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
11
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
12 local olddm = {}; -- maintain old datamanager, for backwards compatibility
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
13 for k,v in pairs(datamanager) do olddm[k] = v; end
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
14
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
15 local driver_cache = multitable.new();
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
16 local store_cache = multitable.new();
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
17
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
18 module("storagemanager")
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
19
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
20 local default_driver_mt = {};
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
21 default_driver_mt.__index = default_driver_mt;
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
22 function default_driver_mt:open(store)
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
23 return setmetatable({ host = self.host, store = self.store }, default_driver_mt);
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
24 end
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
25 function default_driver_mt:get(user) return olddm.load(user, self.host, self.store); end
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
26 function default_driver_mt:set(user, data) return olddm.store(user, self.host, self.store, data); end
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
27
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
28 local function load_driver_for_host(host)
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
29 if driver_cache:get(host) then return driver_cache:get(host); end
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
30
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
31 local host_session = hosts[host];
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
32 if not host_session then error("No such host"); end
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
33
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
34 local driver_plugin = config.get(host, "core", "datastore");
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
35 if not driver_plugin then return setmetatable({ host = host }, default_driver_mt); end
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
36
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
37 local provider;
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
38 local function handler(event) provider = event.item; end
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
39 host_session.events.add_handler("item-added/data-driver", handler);
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
40 local success, err = modulemanager.load(host, driver_plugin);
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
41 host_session.events.remove_handler("item-added/data-driver", handler);
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
42 if not success then error(err); end
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
43 if not provider then error("Module didn't add a provider"); end
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
44
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
45 driver_cache:set(host, provider);
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
46 log("debug", "Data driver '%s' loaded for host '%s'", driver_plugin, host);
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
47 return provider;
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
48 end
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
49
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
50 function open(host, store, typ)
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
51 local ret = store_cache:get(host, store);
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
52 if not ret then
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
53 local driver = load_driver_for_host(host);
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
54 ret = driver:open(store, typ);
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
55 if not ret then ret = setmetatable({ host = host, store = store }, default_driver_mt); end -- default to default driver
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
56 store_cache:set(host, store, ret);
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
57 end
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
58 return ret;
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
59 end
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
60
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
61 function datamanager.load(username, host, datastore)
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
62 return open(host, datastore):get(username);
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
63 end
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
64 function datamanager.store(username, host, datastore, data)
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
65 return open(host, datastore):set(username, data);
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
66 end
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
67
2387f35db5c8 storagemanager: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
68 return _M;