refactor(psk): create the ets table in supervisor process

apps/emqx_psk_file/include/emqx_psk_file.hrl

@@ -0,0 +1,25 @@
+%%--------------------------------------------------------------------
+%% Copyright (c) 2022 EMQ Technologies Co., Ltd. All Rights Reserved.
+%%
+%% Licensed 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.
+%%--------------------------------------------------------------------
+
+-ifndef(EMQX_PSK_FILE).
+-define(EMQX_PSK_FILE, true).
+
+-define(PSK_FILE_TAB, emqx_psk_file).
+
+-record(psk_entry, {psk_id :: binary(),
+                    psk_str :: binary()}).
+
+-endif.

apps/emqx_psk_file/src/emqx_psk_file.app.src

@@ -1,6 +1,6 @@
 {application, emqx_psk_file,
  [{description,"EMQX PSK Plugin from File"},
-  {vsn, "4.3.0"}, % strict semver, bump manually!
+  {vsn, "4.3.1"}, % strict semver, bump manually!
   {modules,[]},
   {registered,[emqx_psk_file_sup]},
   {applications,[kernel,stdlib]},

apps/emqx_psk_file/src/emqx_psk_file.appup.src

@@ -0,0 +1,10 @@
+%% -*- mode: erlang -*-
+{VSN,
+  [{"4.3.0",
+    [{load_module,emqx_psk_file,brutal_purge,soft_purge,[]},
+     {load_module,emqx_psk_file_sup,brutal_purge,soft_purge,[]}]}
+  ],
+  [{"4.3.0",
+    [{load_module,emqx_psk_file,brutal_purge,soft_purge,[]},
+     {load_module,emqx_psk_file_sup,brutal_purge,soft_purge,[]}]}
+  ]}.

apps/emqx_psk_file/src/emqx_psk_file.erl

@@ -16,6 +16,7 @@
 
 -module(emqx_psk_file).
 
+-include("emqx_psk_file.hrl").
 -include_lib("emqx/include/emqx.hrl").
 -include_lib("emqx/include/logger.hrl").
 
@@ -26,15 +27,10 @@
 %% Hooks functions
 -export([on_psk_lookup/2]).
 
--define(TAB, ?MODULE).
 -define(LF, 10).
 
--record(psk_entry, {psk_id :: binary(),
-                    psk_str :: binary()}).
-
 %% Called when the plugin application start
 load(Env) ->
-    _ = ets:new(?TAB, [set, named_table, {keypos, #psk_entry.psk_id}]),
     {ok, PskFile} = file:open(get_value(path, Env), [read, raw, binary, read_ahead]),
     preload_psks(PskFile, bin(get_value(delimiter, Env))),
     _ = file:close(PskFile),
@@ -45,7 +41,7 @@ unload() ->
     emqx:unhook('tls_handshake.psk_lookup', fun ?MODULE:on_psk_lookup/2).
 
 on_psk_lookup(ClientPSKID, UserState) ->
-    case ets:lookup(?TAB, ClientPSKID) of
+    case ets:lookup(?PSK_FILE_TAB, ClientPSKID) of
         [#psk_entry{psk_str = PskStr}] ->
             {stop, PskStr};
         [] ->
@@ -57,7 +53,9 @@ preload_psks(FileHandler, Delimiter) ->
         {ok, Line} ->
             case binary:split(Line, Delimiter) of
                 [Key, Rem] ->
-                    ets:insert(?TAB, #psk_entry{psk_id = Key, psk_str = trim_lf(Rem)}),
+                    ets:insert(
+                      ?PSK_FILE_TAB,
+                      #psk_entry{psk_id = Key, psk_str = trim_lf(Rem)}),
                     preload_psks(FileHandler, Delimiter);
                 [Line] ->
                     ?LOG(warning, "[~p] - Invalid line: ~p, delimiter: ~p", [?MODULE, Line, Delimiter])

apps/emqx_psk_file/src/emqx_psk_file_sup.erl

@@ -16,6 +16,8 @@
 
 -module(emqx_psk_file_sup).
 
+-include("emqx_psk_file.hrl").
+
 -behaviour(supervisor).
 
 %% API
@@ -25,8 +27,11 @@
 -export([init/1]).
 
 start_link() ->
+    _ = ets:new(
+          ?PSK_FILE_TAB,
+          [set, named_table, public, {keypos, #psk_entry.psk_id}]
+         ),
     supervisor:start_link({local, ?MODULE}, ?MODULE, []).
 
 init([]) ->
     {ok, { {one_for_one, 0, 1}, []} }.
-