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authorUlf Wiger <[email protected]>2015-11-05 14:38:57 +0100
committerDan Gudmundsson <[email protected]>2016-05-09 14:51:43 +0200
commit22a1b438a34fcdf6d36019981fa303d8a5162500 (patch)
tree13dd28ff7eb6338b16880a0892ea35efce2c878f /lib/mnesia/src/mnesia_ext_sup.erl
parent586e8f0cb587355221ed8a24c4e8ca06e8404192 (diff)
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mnesia_ext: Add supervisor and behaviour modules
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-rw-r--r--lib/mnesia/src/mnesia_ext_sup.erl59
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diff --git a/lib/mnesia/src/mnesia_ext_sup.erl b/lib/mnesia/src/mnesia_ext_sup.erl
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+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 1996-2015. 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.
+%%
+%% %CopyrightEnd%
+%%
+
+%%
+%% This module implements a supervisor for external (plug-in) processes
+
+-module(mnesia_ext_sup).
+-behaviour(supervisor).
+
+-export([start/0,
+ init/1,
+ start_proc/4, start_proc/5,
+ stop_proc/1]).
+
+-define(SHUTDOWN, 120000). % 2 minutes
+
+start() ->
+ supervisor:start_link({local, ?MODULE}, ?MODULE, []).
+
+start_proc(Name, M, F, A) ->
+ start_proc(Name, M, F, A, []).
+
+start_proc(Name, M, F, A, Opts) ->
+ [Restart, Shutdown, Type, Modules] =
+ [proplists:get_value(K, Opts, Default)
+ || {K, Default} <- [{restart, transient},
+ {shutdown, ?SHUTDOWN},
+ {type, worker},
+ {modules, [M]}]],
+ case supervisor:start_child(
+ ?MODULE, {Name, {M,F,A}, Restart, Shutdown, Type, Modules}) of
+ {error, already_present} ->
+ supervisor:restart_child(?MODULE, Name);
+ Other ->
+ Other
+ end.
+
+stop_proc(Name) ->
+ supervisor:terminate_child(?MODULE, Name).
+
+init(_) ->
+ {ok, {{one_for_all, 10, 60}, []}}.