fix(limiter): remove the `enable` field

apps/emqx/i18n/emqx_limiter_i18n.conf

@@ -1,16 +1,5 @@
 emqx_limiter_schema {
 
-  enable {
-    desc {
-      en: """Enable"""
-      zh: """是否开启"""
-    }
-    label: {
-      en: """Enable"""
-      zh: """是否开启"""
-    }
-  }
-
   failure_strategy {
     desc {
       en: """The strategy when all the retries failed."""

apps/emqx/src/emqx_limiter/src/emqx_limiter_manager.erl

@@ -119,19 +119,9 @@ post_config_update([limiter, Type], _Config, NewConf, _OldConf, _AppEnvs) ->
     Config = maps:get(Type, NewConf),
     case emqx_limiter_server:whereis(Type) of
         undefined ->
-            case Config of
-                #{enable := false} ->
-                    ok;
-                _ ->
-                    start_server(Type)
-            end;
+            start_server(Type, Config);
         _ ->
-            case Config of
-                #{enable := false} ->
-                    stop_server(Type);
-                _ ->
-                    emqx_limiter_server:update_config(Type, Config)
-            end
+            emqx_limiter_server:update_config(Type, Config)
     end.
 
 %%--------------------------------------------------------------------

apps/emqx/src/emqx_limiter/src/emqx_limiter_schema.erl

@@ -30,8 +30,7 @@
     namespace/0,
     get_bucket_cfg_path/2,
     desc/1,
-    types/0,
-    is_enable/1
+    types/0
 ]).
 
 -define(KILOBYTE, 1024).
@@ -89,13 +88,12 @@ fields(limiter) ->
         {Type,
             ?HOCON(?R_REF(limiter_opts), #{
                 desc => ?DESC(Type),
-                default => #{<<"enable">> => false}
+                default => #{}
             })}
      || Type <- types()
     ];
 fields(limiter_opts) ->
     [
-        {enable, ?HOCON(boolean(), #{desc => ?DESC(enable), default => true})},
         {rate, ?HOCON(rate(), #{desc => ?DESC(rate), default => "infinity"})},
         {burst,
             ?HOCON(burst_rate(), #{
@@ -202,10 +200,6 @@ to_rate(Str) ->
 get_bucket_cfg_path(Type, BucketName) ->
     [limiter, Type, bucket, BucketName].
 
--spec is_enable(limiter_type()) -> boolean().
-is_enable(Type) ->
-    emqx:get_config([limiter, Type, enable], false).
-
 types() ->
     [bytes_in, message_in, connection, message_routing, batch].
 

apps/emqx/src/emqx_limiter/src/emqx_limiter_server.erl

@@ -113,13 +113,10 @@
 connect(_Type, undefined) ->
     {ok, emqx_htb_limiter:make_infinity_limiter()};
 connect(Type, BucketName) when is_atom(BucketName) ->
-    case check_enable_and_get_bucket_cfg(Type, BucketName) of
+    case get_bucket_cfg(Type, BucketName) of
         undefined ->
             ?SLOG(error, #{msg => "bucket_config_not_found", type => Type, bucket => BucketName}),
             {error, config_not_found};
-        limiter_not_started ->
-            ?SLOG(error, #{msg => "limiter_not_started", type => Type, bucket => BucketName}),
-            {error, limiter_not_started};
         #{
             rate := AggrRate,
             capacity := AggrSize,
@@ -478,7 +475,7 @@ init_tree(Type, #{bucket := Buckets} = Cfg) ->
 
     State2 = State#{
         root := Root,
-        counter := counters:new(CounterNum, [write_concurrency])
+        counter := counters:new(CounterNum, [atomics])
     },
 
     lists:foldl(fun(F, Acc) -> F(Acc) end, State2, DelayBuckets).
@@ -605,13 +602,8 @@ call(Type, Msg) ->
             gen_server:call(Pid, Msg)
     end.
 
--spec check_enable_and_get_bucket_cfg(limiter_type(), bucket_name()) ->
+-spec get_bucket_cfg(limiter_type(), bucket_name()) ->
     undefined | limiter_not_started | hocons:config().
-check_enable_and_get_bucket_cfg(Type, Bucket) ->
-    case emqx_limiter_schema:is_enable(Type) of
-        false ->
-            limiter_not_started;
-        _ ->
-            Path = emqx_limiter_schema:get_bucket_cfg_path(Type, Bucket),
-            emqx:get_config(Path, undefined)
-    end.
+get_bucket_cfg(Type, Bucket) ->
+    Path = emqx_limiter_schema:get_bucket_cfg_path(Type, Bucket),
+    emqx:get_config(Path, undefined).

apps/emqx/src/emqx_limiter/src/emqx_limiter_server_sup.erl

@@ -101,14 +101,4 @@ make_child(Type, Cfg) ->
     }.
 
 childs() ->
-    Conf = emqx:get_config([limiter]),
-    lists:foldl(
-        fun
-            ({Type, #{enable := true}}, Acc) ->
-                [make_child(Type) | Acc];
-            (_, Acc) ->
-                Acc
-        end,
-        [],
-        maps:to_list(Conf)
-    ).
+    [make_child(Type) || Type <- emqx_limiter_schema:types()].