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
177
178
179
|
%% This Source Code Form is subject to the terms of the Mozilla Public
%% License, v. 2.0. If a copy of the MPL was not distributed with this
%% file, You can obtain one at https://mozilla.org/MPL/2.0/.
%%
%% Copyright (c) 2007-2020 VMware, Inc. or its affiliates. All rights reserved.
%%
-module(rabbit_policies).
%% Provides built-in policy parameter
%% validation functions.
-behaviour(rabbit_policy_validator).
-behaviour(rabbit_policy_merge_strategy).
-include("rabbit.hrl").
-export([register/0, validate_policy/1, merge_policy_value/3]).
-rabbit_boot_step({?MODULE,
[{description, "internal policies"},
{mfa, {rabbit_policies, register, []}},
{requires, rabbit_registry},
{enables, recovery}]}).
register() ->
%% Note: there are more validators registered from other modules,
%% such as rabbit_mirror_queue_misc
[rabbit_registry:register(Class, Name, ?MODULE) ||
{Class, Name} <- [{policy_validator, <<"alternate-exchange">>},
{policy_validator, <<"dead-letter-exchange">>},
{policy_validator, <<"dead-letter-routing-key">>},
{policy_validator, <<"message-ttl">>},
{policy_validator, <<"expires">>},
{policy_validator, <<"max-length">>},
{policy_validator, <<"max-length-bytes">>},
{policy_validator, <<"max-in-memory-length">>},
{policy_validator, <<"max-in-memory-bytes">>},
{policy_validator, <<"queue-mode">>},
{policy_validator, <<"overflow">>},
{policy_validator, <<"delivery-limit">>},
{policy_validator, <<"max-age">>},
{policy_validator, <<"max-segment-size">>},
{policy_validator, <<"queue-leader-locator">>},
{policy_validator, <<"initial-cluster-size">>},
{operator_policy_validator, <<"expires">>},
{operator_policy_validator, <<"message-ttl">>},
{operator_policy_validator, <<"max-length">>},
{operator_policy_validator, <<"max-length-bytes">>},
{operator_policy_validator, <<"max-in-memory-length">>},
{operator_policy_validator, <<"max-in-memory-bytes">>},
{operator_policy_validator, <<"delivery-limit">>},
{policy_merge_strategy, <<"expires">>},
{policy_merge_strategy, <<"message-ttl">>},
{policy_merge_strategy, <<"max-length">>},
{policy_merge_strategy, <<"max-length-bytes">>},
{policy_merge_strategy, <<"max-in-memory-length">>},
{policy_merge_strategy, <<"max-in-memory-bytes">>},
{policy_merge_strategy, <<"delivery-limit">>}]],
ok.
-spec validate_policy([{binary(), term()}]) -> rabbit_policy_validator:validate_results().
validate_policy(Terms) ->
lists:foldl(fun ({Key, Value}, ok) -> validate_policy0(Key, Value);
(_, Error) -> Error
end, ok, Terms).
validate_policy0(<<"alternate-exchange">>, Value)
when is_binary(Value) ->
ok;
validate_policy0(<<"alternate-exchange">>, Value) ->
{error, "~p is not a valid alternate exchange name", [Value]};
validate_policy0(<<"dead-letter-exchange">>, Value)
when is_binary(Value) ->
ok;
validate_policy0(<<"dead-letter-exchange">>, Value) ->
{error, "~p is not a valid dead letter exchange name", [Value]};
validate_policy0(<<"dead-letter-routing-key">>, Value)
when is_binary(Value) ->
ok;
validate_policy0(<<"dead-letter-routing-key">>, Value) ->
{error, "~p is not a valid dead letter routing key", [Value]};
validate_policy0(<<"message-ttl">>, Value)
when is_integer(Value), Value >= 0 ->
ok;
validate_policy0(<<"message-ttl">>, Value) ->
{error, "~p is not a valid message TTL", [Value]};
validate_policy0(<<"expires">>, Value)
when is_integer(Value), Value >= 1 ->
ok;
validate_policy0(<<"expires">>, Value) ->
{error, "~p is not a valid queue expiry", [Value]};
validate_policy0(<<"max-length">>, Value)
when is_integer(Value), Value >= 0 ->
ok;
validate_policy0(<<"max-length">>, Value) ->
{error, "~p is not a valid maximum length", [Value]};
validate_policy0(<<"max-length-bytes">>, Value)
when is_integer(Value), Value >= 0 ->
ok;
validate_policy0(<<"max-length-bytes">>, Value) ->
{error, "~p is not a valid maximum length in bytes", [Value]};
validate_policy0(<<"max-in-memory-length">>, Value)
when is_integer(Value), Value >= 0 ->
ok;
validate_policy0(<<"max-in-memory-length">>, Value) ->
{error, "~p is not a valid maximum memory in bytes", [Value]};
validate_policy0(<<"max-in-memory-bytes">>, Value)
when is_integer(Value), Value >= 0 ->
ok;
validate_policy0(<<"max-in-memory-bytes">>, Value) ->
{error, "~p is not a valid maximum memory in bytes", [Value]};
validate_policy0(<<"queue-mode">>, <<"default">>) ->
ok;
validate_policy0(<<"queue-mode">>, <<"lazy">>) ->
ok;
validate_policy0(<<"queue-mode">>, Value) ->
{error, "~p is not a valid queue-mode value", [Value]};
validate_policy0(<<"overflow">>, <<"drop-head">>) ->
ok;
validate_policy0(<<"overflow">>, <<"reject-publish">>) ->
ok;
validate_policy0(<<"overflow">>, <<"reject-publish-dlx">>) ->
ok;
validate_policy0(<<"overflow">>, Value) ->
{error, "~p is not a valid overflow value", [Value]};
validate_policy0(<<"delivery-limit">>, Value)
when is_integer(Value), Value >= 0 ->
ok;
validate_policy0(<<"delivery-limit">>, Value) ->
{error, "~p is not a valid delivery limit", [Value]};
validate_policy0(<<"max-age">>, Value) ->
case rabbit_amqqueue:check_max_age(Value) of
{error, _} ->
{error, "~p is not a valid max age", [Value]};
_ ->
ok
end;
validate_policy0(<<"queue-leader-locator">>, <<"client-local">>) ->
ok;
validate_policy0(<<"queue-leader-locator">>, <<"random">>) ->
ok;
validate_policy0(<<"queue-leader-locator">>, <<"least-leaders">>) ->
ok;
validate_policy0(<<"queue-leader-locator">>, Value) ->
{error, "~p is not a valid queue leader locator value", [Value]};
validate_policy0(<<"initial-cluster-size">>, Value)
when is_integer(Value), Value >= 0 ->
ok;
validate_policy0(<<"initial-cluster-size">>, Value) ->
{error, "~p is not a valid cluster size", [Value]};
validate_policy0(<<"max-segment-size">>, Value)
when is_integer(Value), Value >= 0 ->
ok;
validate_policy0(<<"max-segment-size">>, Value) ->
{error, "~p is not a valid segment size", [Value]}.
merge_policy_value(<<"message-ttl">>, Val, OpVal) -> min(Val, OpVal);
merge_policy_value(<<"max-length">>, Val, OpVal) -> min(Val, OpVal);
merge_policy_value(<<"max-length-bytes">>, Val, OpVal) -> min(Val, OpVal);
merge_policy_value(<<"max-in-memory-length">>, Val, OpVal) -> min(Val, OpVal);
merge_policy_value(<<"max-in-memory-bytes">>, Val, OpVal) -> min(Val, OpVal);
merge_policy_value(<<"expires">>, Val, OpVal) -> min(Val, OpVal);
merge_policy_value(<<"delivery-limit">>, Val, OpVal) -> min(Val, OpVal).
|
