1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
% Copyright 2010 Cloudant
%
% Licensed under the Apache License, Version 2.0 (the "License"); you may not
% use this file except in compliance with the License. You may obtain a copy of
% the License at
%
% http://www.apache.org/licenses/LICENSE-2.0
%
% Unless required by applicable law or agreed to in writing, software
% distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
% WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
% License for the specific language governing permissions and limitations under
% the License.
-module(mem3_sync_event).
-behaviour(gen_event).
-export([init/1, handle_event/2, handle_call/2, handle_info/2, terminate/2,
code_change/3]).
init(_) ->
net_kernel:monitor_nodes(true),
{ok, nil}.
handle_event({add_node, Node}, State) when Node =/= node() ->
Db1 = list_to_binary(couch_config:get("mem3", "node_db", "nodes")),
Db2 = list_to_binary(couch_config:get("mem3", "shard_db", "dbs")),
Db3 = list_to_binary(couch_config:get("couch_httpd_auth",
"authentication_db", "_users")),
[mem3_sync:push(Db, Node) || Db <- [Db1, Db2, Db3]],
{ok, State};
handle_event({remove_node, Node}, State) ->
mem3_sync:remove_node(Node),
{ok, State};
handle_event(_Event, State) ->
{ok, State}.
handle_call(_Request, State) ->
{ok, ok, State}.
handle_info({nodeup, Node}, State) ->
case lists:member(Node, mem3:nodes()) of
true ->
Db1 = list_to_binary(couch_config:get("mem3", "node_db", "nodes")),
Db2 = list_to_binary(couch_config:get("mem3", "shard_db", "dbs")),
Db3 = list_to_binary(couch_config:get("couch_httpd_auth",
"authentication_db", "_users")),
[mem3_sync:push(Db, Node) || Db <- [Db1, Db2, Db3]],
mem3_sync:initial_sync([Node]);
false ->
ok
end,
{ok, State};
handle_info({nodedown, Node}, State) ->
mem3_sync:remove_node(Node),
{ok, State};
handle_info(_Info, State) ->
{ok, State}.
terminate(_Reason, _State) ->
ok.
code_change(_OldVsn, State, _Extra) ->
{ok, State}.
|
