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%% 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_federation_mgmt).
-behaviour(rabbit_mgmt_extension).
-export([dispatcher/0, web_ui/0]).
-export([init/2, to_json/2, resource_exists/2, content_types_provided/2,
is_authorized/2, allowed_methods/2, delete_resource/2]).
-import(rabbit_misc, [pget/2]).
-include_lib("rabbitmq_management_agent/include/rabbit_mgmt_records.hrl").
dispatcher() -> [{"/federation-links", ?MODULE, [all]},
{"/federation-links/:vhost", ?MODULE, [all]},
{"/federation-links/state/down/", ?MODULE, [down]},
{"/federation-links/:vhost/state/down", ?MODULE, [down]},
{"/federation-links/vhost/:vhost/:id/:node/restart", ?MODULE, []}].
web_ui() -> [{javascript, <<"federation.js">>}].
%%--------------------------------------------------------------------
init(Req, [Filter]) ->
{cowboy_rest, rabbit_mgmt_cors:set_headers(Req, ?MODULE), {Filter, #context{}}};
init(Req, []) ->
{cowboy_rest, rabbit_mgmt_cors:set_headers(Req, ?MODULE), #context{}}.
content_types_provided(ReqData, Context) ->
{[{<<"application/json">>, to_json}], ReqData, Context}.
allowed_methods(ReqData, Context) ->
{[<<"HEAD">>, <<"GET">>, <<"DELETE">>, <<"OPTIONS">>], ReqData, Context}.
resource_exists(ReqData, Context) ->
{case rabbit_mgmt_util:vhost(ReqData) of
not_found -> false;
_ -> case rabbit_mgmt_util:id(id, ReqData) of
%% Listing links
none -> true;
%% Restarting a link
Id ->
lookup(Id, ReqData)
end
end, ReqData, Context}.
to_json(ReqData, {Filter, Context}) ->
Chs = rabbit_mgmt_db:get_all_channels(
rabbit_mgmt_util:range(ReqData)),
rabbit_mgmt_util:reply_list(
filter_vhost(status(Chs, ReqData, Context, Filter), ReqData), ReqData, Context);
to_json(ReqData, Context) ->
to_json(ReqData, {all, Context}).
is_authorized(ReqData, {Filter, Context}) ->
{Res, RD, C} = rabbit_mgmt_util:is_authorized_monitor(ReqData, Context),
{Res, RD, {Filter, C}};
is_authorized(ReqData, Context) ->
rabbit_mgmt_util:is_authorized_monitor(ReqData, Context).
delete_resource(ReqData, Context) ->
Reply = case rabbit_mgmt_util:id(id, ReqData) of
none -> false;
Id -> restart(Id, ReqData)
end,
{Reply, ReqData, Context}.
%%--------------------------------------------------------------------
filter_vhost(List, ReqData) ->
rabbit_mgmt_util:all_or_one_vhost(
ReqData,
fun(V) -> lists:filter(fun(I) -> pget(vhost, I) =:= V end, List) end).
status(Chs, ReqData, Context, Filter) ->
rabbit_mgmt_util:filter_vhost(
lists:append([status(Node, Chs, Filter) || Node <- [node() | nodes()]]),
ReqData, Context).
status(Node, Chs, Filter) ->
case rpc:call(Node, rabbit_federation_status, status, [], infinity) of
{badrpc, {'EXIT', {undef, _}}} -> [];
{badrpc, {'EXIT', {noproc, _}}} -> [];
Status -> [format(Node, I, Chs) || I <- Status,
filter_status(I, Filter)]
end.
filter_status(_, all) ->
true;
filter_status(Props, down) ->
Status = pget(status, Props),
not lists:member(Status, [running, starting]).
format(Node, Info, Chs) ->
LocalCh = case rabbit_mgmt_format:strip_pids(
[Ch || Ch <- Chs,
pget(name, pget(connection_details, Ch))
=:= pget(local_connection, Info)]) of
[Ch] -> [{local_channel, Ch}];
[] -> []
end,
[{node, Node} | format_info(Info)] ++ LocalCh.
format_info(Items) ->
[format_item(I) || I <- Items].
format_item({timestamp, {{Y, M, D}, {H, Min, S}}}) ->
{timestamp, print("~w-~2.2.0w-~2.2.0w ~w:~2.2.0w:~2.2.0w",
[Y, M, D, H, Min, S])};
format_item({error, E}) ->
{error, rabbit_mgmt_format:print("~p", [E])};
format_item(I) ->
I.
print(Fmt, Val) ->
list_to_binary(io_lib:format(Fmt, Val)).
lookup(Id, ReqData) ->
Node = get_node(ReqData),
case rpc:call(Node, rabbit_federation_status, lookup, [Id], infinity) of
{badrpc, _} -> false;
not_found -> false;
_ -> true
end.
restart(Id, ReqData) ->
Node = get_node(ReqData),
case rpc:call(Node, rabbit_federation_status, lookup, [Id], infinity) of
not_found -> false;
Obj ->
Upstream = proplists:get_value(upstream, Obj),
Supervisor = proplists:get_value(supervisor, Obj),
rpc:call(Node, rabbit_federation_link_sup, restart, [Supervisor, Upstream], infinity),
true
end.
get_node(ReqData) ->
list_to_atom(binary_to_list(rabbit_mgmt_util:id(node, ReqData))).
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