| 1 |
|
-module(mod_muc_online_mnesia). |
| 2 |
|
-behaviour(mod_muc_online_backend). |
| 3 |
|
|
| 4 |
|
-export([start/2, |
| 5 |
|
stop/1, |
| 6 |
|
register_room/4, |
| 7 |
|
room_destroyed/4, |
| 8 |
|
find_room_pid/3, |
| 9 |
|
get_online_rooms/2, |
| 10 |
|
node_cleanup/2, |
| 11 |
|
clear_table/1]). |
| 12 |
|
|
| 13 |
|
-include_lib("mod_muc.hrl"). |
| 14 |
|
|
| 15 |
|
-spec start(mongooseim:host_type(), gen_mod:module_opts()) -> ok. |
| 16 |
|
start(_HostType, _Opts) -> |
| 17 |
29 |
mongoose_mnesia:create_table(muc_online_room, |
| 18 |
|
[{ram_copies, [node()]}, |
| 19 |
|
{attributes, record_info(fields, muc_online_room)}]), |
| 20 |
29 |
ok. |
| 21 |
|
|
| 22 |
|
-spec stop(mongooseim:host_type()) -> ok. |
| 23 |
29 |
stop(_HostType) -> ok. |
| 24 |
|
|
| 25 |
|
-spec register_room( |
| 26 |
|
HostType :: mongooseim:host_type(), |
| 27 |
|
MucHost :: jid:lserver(), |
| 28 |
|
Room :: mod_muc:room(), |
| 29 |
|
Pid :: pid()) -> ok | {exists, pid()} | {error, term()}. |
| 30 |
|
register_room(HostType, MucHost, Room, Pid) -> |
| 31 |
627 |
F = fun() -> |
| 32 |
627 |
case mnesia:read(muc_online_room, {Room, MucHost}, write) of |
| 33 |
|
[] -> |
| 34 |
568 |
mnesia:write(#muc_online_room{name_host = {Room, MucHost}, |
| 35 |
|
host_type = HostType, |
| 36 |
|
pid = Pid}); |
| 37 |
|
[R] -> |
| 38 |
59 |
{exists, R#muc_online_room.pid} |
| 39 |
|
end |
| 40 |
|
end, |
| 41 |
627 |
simple_transaction_result(mnesia:transaction(F)). |
| 42 |
|
|
| 43 |
|
%% Race condition is possible between register and room_destroyed |
| 44 |
|
%% (Because register is outside of the room process) |
| 45 |
|
-spec room_destroyed(mongooseim:host_type(), jid:lserver(), mod_muc:room(), pid()) -> ok. |
| 46 |
|
room_destroyed(HostType, MucHost, Room, Pid) -> |
| 47 |
614 |
Obj = #muc_online_room{name_host = {Room, MucHost}, |
| 48 |
|
host_type = HostType, pid = Pid}, |
| 49 |
614 |
F = fun() -> mnesia:delete_object(Obj) end, |
| 50 |
614 |
{atomic, ok} = mnesia:transaction(F), |
| 51 |
613 |
ok. |
| 52 |
|
|
| 53 |
|
simple_transaction_result({atomic, Res}) -> |
| 54 |
627 |
Res; |
| 55 |
|
simple_transaction_result({aborted, Reason}) -> |
| 56 |
:-( |
{error, Reason}. |
| 57 |
|
|
| 58 |
|
-spec find_room_pid(mongooseim:host_type(), jid:server(), mod_muc:room()) -> |
| 59 |
|
{ok, pid()} | {error, not_found}. |
| 60 |
|
find_room_pid(_HostType, MucHost, Room) -> |
| 61 |
4090 |
case mnesia:dirty_read(muc_online_room, {Room, MucHost}) of |
| 62 |
|
[R] -> |
| 63 |
3737 |
{ok, R#muc_online_room.pid}; |
| 64 |
|
[] -> |
| 65 |
353 |
{error, not_found} |
| 66 |
|
end. |
| 67 |
|
|
| 68 |
|
-spec get_online_rooms(mongooseim:host_type(), jid:lserver()) -> |
| 69 |
|
[mod_muc:muc_online_room()]. |
| 70 |
|
get_online_rooms(_HostType, MucHost) -> |
| 71 |
44 |
mnesia:dirty_select(muc_online_room, |
| 72 |
|
[{#muc_online_room{name_host = '$1', _ = '_'}, |
| 73 |
|
[{'==', {element, 2, '$1'}, MucHost}], |
| 74 |
|
['$_']}]). |
| 75 |
|
|
| 76 |
|
-spec node_cleanup(mongooseim:host_type(), node()) -> ok. |
| 77 |
|
node_cleanup(HostType, Node) -> |
| 78 |
:-( |
F = fun() -> |
| 79 |
:-( |
Es = mnesia:select( |
| 80 |
|
muc_online_room, |
| 81 |
|
[{#muc_online_room{pid = '$1', |
| 82 |
|
host_type = HostType, |
| 83 |
|
_ = '_'}, |
| 84 |
|
[{'==', {node, '$1'}, Node}], |
| 85 |
|
['$_']}]), |
| 86 |
:-( |
lists:foreach(fun(E) -> |
| 87 |
:-( |
mnesia:delete_object(E) |
| 88 |
|
end, Es) |
| 89 |
|
end, |
| 90 |
:-( |
mnesia:async_dirty(F), |
| 91 |
:-( |
ok. |
| 92 |
|
|
| 93 |
|
%% Clear table for tests |
| 94 |
|
-spec clear_table(mongooseim:host_type()) -> ok. |
| 95 |
|
clear_table(_HostType) -> |
| 96 |
18 |
mnesia:clear_table(muc_online_room), |
| 97 |
18 |
ok. |