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%% -------------------------------------------------------------------
%%
%% weatherreport - automated diagnostic tools for CouchDB
%%
%% Copyright (c) 2014 Cloudant
%%
%% This file is provided to you 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.
%%
%% -------------------------------------------------------------------
%% @doc Diagnostic that checks the current size of the mem3_sync
%% backlog. The size is printed as an info message if under a defined
%% threshold, or as a warning if above the threshold.
-module(weatherreport_check_internal_replication).
-behaviour(weatherreport_check).
-export([
description/0,
valid/0,
check/1,
format/1
]).
-define(THRESHOLD, 1000000).
-spec description() -> string().
description() ->
"Check the number of pending internal replication jobs".
-spec valid() -> boolean().
valid() ->
weatherreport_node:can_connect().
-spec total_to_level(integer()) -> atom().
total_to_level(Total) when Total > ?THRESHOLD ->
warning;
total_to_level(_Total) ->
info.
-spec check(list()) -> [{atom(), term()}].
check(_Opts) ->
Backlog = mem3_sync:get_backlog(),
[{total_to_level(Backlog), Backlog}].
-spec format(term()) -> {io:format(), [term()]}.
format(Backlog) ->
{"Total number of pending internal replication jobs: ~w", [Backlog]}.
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