From cc79802d6c0d1e0dbf9a0a8e49d563f24c52afd5 Mon Sep 17 00:00:00 2001
From: Feng Lee <feng@emqx.io>
Date: Wed, 18 Sep 2019 19:46:18 +0800
Subject: [PATCH] Add function 'get_caps/3'

---
 src/emqx_mqtt_caps.erl | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/emqx_mqtt_caps.erl b/src/emqx_mqtt_caps.erl
index ec7f55330..25d2ee5e4 100644
--- a/src/emqx_mqtt_caps.erl
+++ b/src/emqx_mqtt_caps.erl
@@ -26,6 +26,7 @@
 
 -export([ get_caps/1
         , get_caps/2
+        , get_caps/3
         ]).
 
 -export([default/0]).
@@ -114,10 +115,13 @@ get_caps(Zone) ->
 -spec(get_caps(emqx_zone:zone(), publish|subscribe) -> caps()).
 get_caps(Zone, publish) ->
     with_env(Zone, '$mqtt_pub_caps', fun pub_caps/1);
-
 get_caps(Zone, subscribe) ->
     with_env(Zone, '$mqtt_sub_caps', fun sub_caps/1).
 
+-spec(get_caps(emqx_zone:zone(), atom(), term()) -> term()).
+get_caps(Zone, Cap, Def) ->
+    emqx_zone:get_env(Zone, Cap, Def).
+
 pub_caps(Zone) ->
     filter_caps(?PUBCAP_KEYS, get_caps(Zone)).