Wed, 22 Dec 2010 03:46:32 +0000
util.pubsub: Add service-wide subscription tracking, and add :get_subscriptions()
2678
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
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1 | |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
2 | -- Basic SQL driver |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
3 | -- This driver stores data as simple key-values |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
4 | |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
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5 | local ser = require "util.serialization".serialize; |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
6 | local deser = function(data) |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
7 | module:log("debug", "deser: %s", tostring(data)); |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
8 | if not data then return nil; end |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
9 | local f = loadstring("return "..data); |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
10 | if not f then return nil; end |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
11 | setfenv(f, {}); |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
12 | local s, d = pcall(f); |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
13 | if not s then return nil; end |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
14 | return d; |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
15 | end; |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
16 | |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
17 | local driver = {}; |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
18 | driver.__index = driver; |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
19 | |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
20 | driver.item_table = "item"; |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
21 | driver.list_table = "list"; |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
22 | |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
23 | function driver:prepare(sql) |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
24 | module:log("debug", "query: %s", sql); |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
25 | local err; |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
26 | if not self.sqlcache then self.sqlcache = {}; end |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
27 | local r = self.sqlcache[sql]; |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
28 | if r then return r; end |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
29 | r, err = self.connection:prepare(sql); |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
30 | if not r then error("Unable to prepare SQL statement: "..err); end |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
31 | self.sqlcache[sql] = r; |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
32 | return r; |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
33 | end |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
34 | |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
35 | function driver:load(username, host, datastore) |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
36 | local select = self:prepare("select data from "..self.item_table.." where username=? and host=? and datastore=?"); |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
37 | select:execute(username, host, datastore); |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
38 | local row = select:fetch(); |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
39 | return row and deser(row[1]) or nil; |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
40 | end |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
41 | |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
42 | function driver:store(username, host, datastore, data) |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
43 | if not data or next(data) == nil then |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
44 | local delete = self:prepare("delete from "..self.item_table.." where username=? and host=? and datastore=?"); |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
45 | delete:execute(username, host, datastore); |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
46 | return true; |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
47 | else |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
48 | local d = self:load(username, host, datastore); |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
49 | if d then -- update |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
50 | local update = self:prepare("update "..self.item_table.." set data=? where username=? and host=? and datastore=?"); |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
51 | return update:execute(ser(data), username, host, datastore); |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
52 | else -- insert |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
53 | local insert = self:prepare("insert into "..self.item_table.." values (?, ?, ?, ?)"); |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
54 | return insert:execute(username, host, datastore, ser(data)); |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
55 | end |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
56 | end |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
57 | end |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
58 | |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
59 | function driver:list_append(username, host, datastore, data) |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
60 | if not data then return; end |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
61 | local insert = self:prepare("insert into "..self.list_table.." values (?, ?, ?, ?)"); |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
62 | return insert:execute(username, host, datastore, ser(data)); |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
63 | end |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
64 | |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
65 | function driver:list_store(username, host, datastore, data) |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
66 | -- remove existing data |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
67 | local delete = self:prepare("delete from "..self.list_table.." where username=? and host=? and datastore=?"); |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
68 | delete:execute(username, host, datastore); |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
69 | if data and next(data) ~= nil then |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
70 | -- add data |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
71 | for _, d in ipairs(data) do |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
72 | self:list_append(username, host, datastore, ser(d)); |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
73 | end |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
74 | end |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
75 | return true; |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
76 | end |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
77 | |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
78 | function driver:list_load(username, host, datastore) |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
79 | local select = self:prepare("select data from "..self.list_table.." where username=? and host=? and datastore=?"); |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
80 | select:execute(username, host, datastore); |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
81 | local r = {}; |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
82 | for row in select:rows() do |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
83 | table.insert(r, deser(row[1])); |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
84 | end |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
85 | return r; |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
86 | end |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
87 | |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
88 | local _M = {}; |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
89 | function _M.new(dbtype, dbname, ...) |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
90 | local d = {}; |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
91 | setmetatable(d, driver); |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
92 | local dbh = get_database(dbtype, dbname, ...); |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
93 | --d:set_connection(dbh); |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
94 | d.connection = dbh; |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
95 | return d; |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
96 | end |
c5882e2e12b5
mod_storage, plus a bit of SQL and XML.
Waqas Hussain <waqas20@gmail.com>
parents:
diff
changeset
|
97 | return _M; |