The R13B03 release.OTP_R13B03

1 files changed, 95 insertions, 0 deletions

diff --git a/lib/sasl/src/alarm_handler.erl b/lib/sasl/src/alarm_handler.erl
new file mode 100644
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+++ b/lib/sasl/src/alarm_handler.erl
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+%%
+%% %CopyrightBegin%
+%% 
+%% Copyright Ericsson AB 1996-2009. All Rights Reserved.
+%% 
+%% The contents of this file are subject to the Erlang Public License,
+%% Version 1.1, (the "License"); you may not use this file except in
+%% compliance with the License. You should have received a copy of the
+%% Erlang Public License along with this software. If not, it can be
+%% retrieved online at http://www.erlang.org/.
+%% 
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and limitations
+%% under the License.
+%% 
+%% %CopyrightEnd%
+%%
+-module(alarm_handler).
+
+%%%-----------------------------------------------------------------
+%%% This is the SASL alarm handler process.
+%%% It is a gen_event process.  When it is started, a simple
+%%% event handler which logs all alarms is installed.
+%%%-----------------------------------------------------------------
+-export([start_link/0, set_alarm/1, clear_alarm/1, get_alarms/0,
+	 add_alarm_handler/1, add_alarm_handler/2,
+	 delete_alarm_handler/1]).
+
+-export([init/1,
+	 handle_event/2, handle_call/2, handle_info/2,
+	 terminate/2]).
+
+start_link() ->
+    case gen_event:start_link({local, alarm_handler}) of
+	{ok, Pid} ->
+	    gen_event:add_handler(alarm_handler, alarm_handler, []),
+	    {ok, Pid};
+	Error -> Error
+    end.
+
+%%-----------------------------------------------------------------
+%% Func: set_alarm/1
+%% Args: Alarm ::= {AlarmId, term()}
+%%       where AlarmId ::= term()
+%%-----------------------------------------------------------------
+set_alarm(Alarm) ->
+    gen_event:notify(alarm_handler, {set_alarm, Alarm}).
+
+%%-----------------------------------------------------------------
+%% Func: clear_alarm/1
+%% Args: AlarmId ::= term()
+%%-----------------------------------------------------------------
+clear_alarm(AlarmId) ->
+    gen_event:notify(alarm_handler, {clear_alarm, AlarmId}).
+
+%%-----------------------------------------------------------------
+%% Func: get_alarms/0
+%% Returns: [{AlarmId, AlarmDesc}]
+%%-----------------------------------------------------------------
+get_alarms() ->
+    gen_event:call(alarm_handler, alarm_handler, get_alarms).
+
+add_alarm_handler(Module) when is_atom(Module) ->
+    gen_event:add_handler(alarm_handler, Module, []).
+
+add_alarm_handler(Module, Args) when is_atom(Module) ->
+    gen_event:add_handler(alarm_handler, Module, Args).
+
+delete_alarm_handler(Module) when is_atom(Module) ->
+    gen_event:delete_handler(alarm_handler, Module, []).
+
+%%-----------------------------------------------------------------
+%% Default Alarm handler
+%%-----------------------------------------------------------------
+init(_) -> {ok, []}.
+    
+handle_event({set_alarm, Alarm}, Alarms)->
+    error_logger:info_report([{alarm_handler, {set, Alarm}}]),
+    {ok, [Alarm | Alarms]};
+handle_event({clear_alarm, AlarmId}, Alarms)->
+    error_logger:info_report([{alarm_handler, {clear, AlarmId}}]),
+    {ok, lists:keydelete(AlarmId, 1, Alarms)};
+handle_event(_, Alarms)->
+    {ok, Alarms}.
+
+handle_info(_, Alarms) -> {ok, Alarms}.
+
+handle_call(get_alarms, Alarms) -> {ok, Alarms, Alarms};
+handle_call(_Query, Alarms)     -> {ok, {error, bad_query}, Alarms}.
+
+terminate(swap, Alarms) ->
+    {alarm_handler, Alarms};
+terminate(_, _) ->
+    ok.