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%% Copyright (c) 2011 Basho Technologies, Inc. All Rights Reserved.
%%
%% 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 Lager's top level supervisor.
%% @private
-module(lager_sup).
-behaviour(supervisor).
%% API
-export([start_link/0]).
%% Callbacks
-export([init/1]).
start_link() ->
supervisor:start_link({local, ?MODULE}, ?MODULE, []).
init([]) ->
Children = [
{lager, {gen_event, start_link, [{local, lager_event}]},
permanent, 5000, worker, [dynamic]},
{lager_handler_watcher_sup, {lager_handler_watcher_sup, start_link, []},
permanent, 5000, supervisor, [lager_handler_watcher_sup]}],
%% check if the crash log is enabled
Crash = case application:get_env(lager, crash_log) of
{ok, undefined} ->
[];
{ok, File} ->
MaxBytes = case application:get_env(lager, crash_log_msg_size) of
{ok, Val} when is_integer(Val) andalso Val > 0 -> Val;
_ -> 65536
end,
RotationSize = case application:get_env(lager, crash_log_size) of
{ok, Val1} when is_integer(Val1) andalso Val1 >= 0 -> Val1;
_ -> 0
end,
RotationCount = case application:get_env(lager, crash_log_count) of
{ok, Val2} when is_integer(Val2) andalso Val2 >=0 -> Val2;
_ -> 0
end,
RotationDate = case application:get_env(lager, crash_log_date) of
{ok, Val3} ->
case lager_util:parse_rotation_date_spec(Val3) of
{ok, Spec} -> Spec;
{error, _} when Val3 == "" -> undefined; %% blank is ok
{error, _} ->
error_logger:error_msg("Invalid date spec for "
"crash log ~p~n", [Val3]),
undefined
end;
_ -> undefined
end,
[{lager_crash_log, {lager_crash_log, start_link, [File, MaxBytes,
RotationSize, RotationDate, RotationCount]},
permanent, 5000, worker, [lager_crash_log]}];
_ ->
[]
end,
{ok, {{one_for_one, 10, 60},
Children ++ Crash
}}.
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