From 6e18f8543d4b036c1d308ce5f8ab1b7d123cf3f6 Mon Sep 17 00:00:00 2001
From: Feng Lee <feng@emqx.io>
Date: Fri, 6 Sep 2019 17:36:13 +0800
Subject: [PATCH] Add emqx_boot module

---
 src/emqx_app.erl |  7 ++++---
 src/emqx_sup.erl | 17 ++++++++++-------
 2 files changed, 14 insertions(+), 10 deletions(-)

diff --git a/src/emqx_app.erl b/src/emqx_app.erl
index 29b8d9b49..8eacdca48 100644
--- a/src/emqx_app.erl
+++ b/src/emqx_app.erl
@@ -35,10 +35,10 @@ start(_Type, _Args) ->
     ok = emqx_modules:load(),
     ok = emqx_plugins:init(),
     emqx_plugins:load(),
-    ok = emqx_listeners:start(),
+    emqx_boot:is_enabled(listeners)
+      andalso (ok = emqx_listeners:start()),
     start_autocluster(),
     register(emqx, self()),
-
     emqx_alarm_handler:load(),
     print_vsn(),
     {ok, Sup}.
@@ -46,7 +46,8 @@ start(_Type, _Args) ->
 -spec(stop(State :: term()) -> term()).
 stop(_State) ->
     emqx_alarm_handler:unload(),
-    emqx_listeners:stop(),
+    emqx_boot:is_enabled(listeners)
+      andalso emqx_listeners:stop(),
     emqx_modules:unload().
 
 %%--------------------------------------------------------------------
diff --git a/src/emqx_sup.erl b/src/emqx_sup.erl
index d3a81fc7f..f95e79b6d 100644
--- a/src/emqx_sup.erl
+++ b/src/emqx_sup.erl
@@ -62,18 +62,21 @@ stop_child(ChildId) ->
 %%--------------------------------------------------------------------
 
 init([]) ->
-    %% Kernel Sup
     KernelSup = child_spec(emqx_kernel_sup, supervisor),
-    %% Router Sup
     RouterSup = child_spec(emqx_router_sup, supervisor),
-    %% Broker Sup
     BrokerSup = child_spec(emqx_broker_sup, supervisor),
-    %% CM Sup
     CMSup = child_spec(emqx_cm_sup, supervisor),
-    %% Sys Sup
     SysSup = child_spec(emqx_sys_sup, supervisor),
-    {ok, {{one_for_all, 0, 1},
-          [KernelSup, RouterSup, BrokerSup, CMSup, SysSup]}}.
+    Childs = [KernelSup] ++
+             [RouterSup || emqx_boot:is_enabled(router)] ++
+             [BrokerSup || emqx_boot:is_enabled(broker)] ++
+             [CMSup || emqx_boot:is_enabled(broker)] ++
+             [SysSup],
+    SupFlags = #{strategy => one_for_all,
+                 intensity => 0,
+                 period => 1
+                },
+    {ok, {SupFlags, Childs}}.
 
 %%--------------------------------------------------------------------
 %% Internal functions