diff options
Diffstat (limited to 'deps/rabbitmq_management/src/rabbit_mgmt_wm_node_memory.erl')
-rw-r--r-- | deps/rabbitmq_management/src/rabbit_mgmt_wm_node_memory.erl | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/deps/rabbitmq_management/src/rabbit_mgmt_wm_node_memory.erl b/deps/rabbitmq_management/src/rabbit_mgmt_wm_node_memory.erl new file mode 100644 index 0000000000..19e4237b44 --- /dev/null +++ b/deps/rabbitmq_management/src/rabbit_mgmt_wm_node_memory.erl @@ -0,0 +1,75 @@ +%% 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_mgmt_wm_node_memory). + +-export([init/2, to_json/2, content_types_provided/2, is_authorized/2]). +-export([resource_exists/2]). +-export([variances/2]). + +-include_lib("rabbitmq_management_agent/include/rabbit_mgmt_records.hrl"). +-include_lib("rabbit_common/include/rabbit.hrl"). + +%%-------------------------------------------------------------------- + +init(Req, [Mode]) -> + {cowboy_rest, rabbit_mgmt_headers:set_common_permission_headers(Req, ?MODULE), {Mode, #context{}}}. + +variances(Req, Context) -> + {[<<"accept-encoding">>, <<"origin">>], Req, Context}. + +content_types_provided(ReqData, Context) -> + {rabbit_mgmt_util:responder_map(to_json), ReqData, Context}. + +resource_exists(ReqData, Context) -> + {node_exists(ReqData, get_node(ReqData)), ReqData, Context}. + +to_json(ReqData, {Mode, Context}) -> + rabbit_mgmt_util:reply(augment(Mode, ReqData), ReqData, {Mode, Context}). + +is_authorized(ReqData, {Mode, Context}) -> + {Res, RD, C} = rabbit_mgmt_util:is_authorized_monitor(ReqData, Context), + {Res, RD, {Mode, C}}. + +%%-------------------------------------------------------------------- +get_node(ReqData) -> + list_to_atom(binary_to_list(rabbit_mgmt_util:id(node, ReqData))). + +node_exists(ReqData, Node) -> + case [N || N <- rabbit_mgmt_wm_nodes:all_nodes(ReqData), + proplists:get_value(name, N) == Node] of + [] -> false; + [_] -> true + end. + +augment(Mode, ReqData) -> + Node = get_node(ReqData), + case node_exists(ReqData, Node) of + false -> + not_found; + true -> + case rpc:call(Node, rabbit_vm, memory, [], infinity) of + {badrpc, _} -> [{memory, not_available}]; + Result -> [{memory, format(Mode, Result)}] + end + end. + +format(absolute, Result) -> + Result; +format(relative, Result) -> + {value, {total, Totals}, Rest} = lists:keytake(total, 1, Result), + Total = proplists:get_value(rss, Totals), + [{total, 100} | [{K, percentage(V, Total)} || {K, V} <- Rest, + K =/= strategy]]. + +percentage(Part, Total) -> + case round((Part/Total) * 100) of + 0 when Part =/= 0 -> + 1; + Int -> + Int + end. |