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
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
% 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(couch_replicator_utils).
-export([
parse_rep_doc/2,
open_db/1,
close_db/1,
local_db_name/1,
start_db_compaction_notifier/2,
stop_db_compaction_notifier/1,
replication_id/2,
sum_stats/2,
is_deleted/1,
rep_error_to_binary/1,
get_json_value/2,
get_json_value/3,
pp_rep_id/1,
iso8601/1,
filter_state/3
]).
-export([
handle_db_event/3
]).
-include_lib("couch/include/couch_db.hrl").
-include("couch_replicator.hrl").
-include("couch_replicator_api_wrap.hrl").
-import(couch_util, [
get_value/2,
get_value/3
]).
open_db(#httpdb{} = HttpDb) ->
HttpDb;
open_db(Db) ->
DbName = couch_db:name(Db),
UserCtx = couch_db:get_user_ctx(Db),
{ok, NewDb} = couch_db:open(DbName, [{user_ctx, UserCtx}]),
NewDb.
close_db(#httpdb{}) ->
ok;
close_db(Db) ->
couch_db:close(Db).
local_db_name(#httpdb{}) ->
undefined;
local_db_name(Db) ->
couch_db:name(Db).
start_db_compaction_notifier(#httpdb{}, _) ->
nil;
start_db_compaction_notifier(Db, Server) ->
DbName = couch_db:name(Db),
{ok, Pid} = couch_event:link_listener(
?MODULE, handle_db_event, Server, [{dbname, DbName}]
),
Pid.
stop_db_compaction_notifier(nil) ->
ok;
stop_db_compaction_notifier(Listener) ->
couch_event:stop_listener(Listener).
handle_db_event(DbName, compacted, Server) ->
gen_server:cast(Server, {db_compacted, DbName}),
{ok, Server};
handle_db_event(_DbName, _Event, Server) ->
{ok, Server}.
rep_error_to_binary(Error) ->
couch_util:to_binary(error_reason(Error)).
error_reason({shutdown, Error}) ->
error_reason(Error);
error_reason({error, {Error, Reason}})
when is_atom(Error), is_binary(Reason) ->
io_lib:format("~s: ~s", [Error, Reason]);
error_reason({error, Reason}) ->
Reason;
error_reason(Reason) ->
Reason.
get_json_value(Key, Props) ->
get_json_value(Key, Props, undefined).
get_json_value(Key, Props, Default) when is_atom(Key) ->
Ref = make_ref(),
case get_value(Key, Props, Ref) of
Ref ->
get_value(?l2b(atom_to_list(Key)), Props, Default);
Else ->
Else
end;
get_json_value(Key, Props, Default) when is_binary(Key) ->
Ref = make_ref(),
case get_value(Key, Props, Ref) of
Ref ->
get_value(list_to_atom(?b2l(Key)), Props, Default);
Else ->
Else
end.
% pretty-print replication id
-spec pp_rep_id(#rep{} | rep_id()) -> string().
pp_rep_id(#rep{id = RepId}) ->
pp_rep_id(RepId);
pp_rep_id({Base, Extension}) ->
Base ++ Extension.
% NV: TODO: this function is not used outside api wrap module
% consider moving it there during final cleanup
is_deleted(Change) ->
get_json_value(<<"deleted">>, Change, false).
% NV: TODO: proxy some functions which used to be here, later remove
% these and replace calls to their respective modules
replication_id(Rep, Version) ->
couch_replicator_ids:replication_id(Rep, Version).
sum_stats(S1, S2) ->
couch_replicator_stats:sum_stats(S1, S2).
parse_rep_doc(Props, UserCtx) ->
couch_replicator_docs:parse_rep_doc(Props, UserCtx).
-spec iso8601(erlang:timestamp()) -> binary().
iso8601({_Mega, _Sec, _Micro} = Timestamp) ->
{{Y, Mon, D}, {H, Min, S}} = calendar:now_to_universal_time(Timestamp),
Format = "~B-~2..0B-~2..0BT~2..0B:~2..0B:~2..0BZ",
iolist_to_binary(io_lib:format(Format, [Y, Mon, D, H, Min, S])).
%% Filter replication info ejson by state provided. If it matches return
%% the input value, if it doesn't return 'skip'. This is used from replicator
%% fabric coordinator and worker.
-spec filter_state(atom(), [atom()], {[_ | _]}) -> {[_ | _]} | skip.
filter_state(null = _State, _States, _Info) ->
skip;
filter_state(_ = _State, [] = _States, Info) ->
Info;
filter_state(State, States, Info) ->
case lists:member(State, States) of
true ->
Info;
false ->
skip
end.
|
