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91 lines
3.2 KiB
91 lines
3.2 KiB
-module(eRum_sup).
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-behaviour(supervisor).
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-include("eRum.hrl").
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-export([
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start_link/0
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]).
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-export([
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init/1
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]).
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start_link() ->
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supervisor:start_link({local, ?MODULE}, ?MODULE, []).
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% 主管的孩子被定义为孩子规格列表 。当主管启动时，将根据此列表从左到右依次启动子进程。主管终止时，它首先以相反的启动顺序从右到左终止其子进程。
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% sup_flags() =
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% #{
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% strategy => strategy(), % optional one_for_one | one_for_all | rest_for_one | simple_one_for_one
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% intensity => non_neg_integer(), % optional MaxR 周期时间内最大重启次数
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% period => pos_integer() % optional MaxT 重启时间周期 MaxT里重启次数大于MaxR
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% }
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% child_spec() =
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% #{
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% id => child_id(), % mandatory Id用来内部标识子规范
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% start => mfargs(), % mandatory {M，F，A}
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% restart => restart(), % optional permanent(总是重启) | transient(异常关闭会重启即关闭原因非 normal,shutdown,{shutdown,Term}) | temporary(不会重启)
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% shutdown => shutdown(), % optional brutal_kill | infinity | integer
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% type => worker(), % optional supervisor | worker
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% modules => modules() % optional [Module] 假如子进程是supervisor、gen_server 或 gen_fsm，那么Module 是回调模块的名称；假如子进程是gen_event，那么Modules 应该是dynamic
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% }
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init(_Args) ->
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%% set up the config, is safe even during relups
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rumConfig:init(),
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%%始终将lager_event作为默认值启动，并确保可以根据需要启动其他gen_event东西也许是一个用于处理接收器及其策略的新API？
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SupFlags =
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#{
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strategy => one_for_one,
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intensity => 10,
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period => 60
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},
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RumEventSpec = #{
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id => rumEvent,
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start => {gen_emm, start_link, [{local, rumEvent}]},
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restart => permanent,
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shutdown => 5000,
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type => worker,
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modules => [dynamic]
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},
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RumHWatcherSupSpec = #{
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id => rumHWatcherSup,
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start => {rumHWatcherSup, start_link, []},
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restart => permanent,
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shutdown => 5000,
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type => supervisor,
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modules => [rumHWatcherSup]
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},
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CrashLogSpec = crashLogSpec(rumUtil:get_env(crashLogFile, false)),
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ChildSpecs =
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case CrashLogSpec of
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undefined ->
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[RumEventSpec, RumHWatcherSupSpec];
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_ ->
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[RumEventSpec, RumHWatcherSupSpec, CrashLogSpec]
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end,
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{ok, {SupFlags, ChildSpecs}}.
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crashLogSpec(false) ->
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undefined;
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crashLogSpec(File) ->
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MaxBytes = rumUtil:get_env(crash_log_msg_size, 65536),
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RotationSize = rumUtil:get_env(crash_log_size, 0),
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RotationCount = rumUtil:get_env(crash_log_count, 0),
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RotationDate = rumUtil:get_env(crash_log_date, "$D0"),
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RotationMod = rumUtil:get_env(crash_log_rotator, lager_rotator_default),
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#{
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id => rumCrashLog,
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start => {rumCrashLog, start_link, [File, MaxBytes, RotationSize, RotationDate, RotationCount, RotationMod]},
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restart => permanent,
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shutdown => 5000,
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type => worker,
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modules => [rumCrashLog]
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}.
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