94 lines
3.5 KiB
Erlang
94 lines
3.5 KiB
Erlang
%%%-----------------------------------------------------------------------------
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%%% Copyright (c) 2012-2015 eMQTT.IO, All Rights Reserved.
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%%%
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%%% Permission is hereby granted, free of charge, to any person obtaining a copy
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%%% of this software and associated documentation files (the "Software"), to deal
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%%% in the Software without restriction, including without limitation the rights
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%%% to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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%%% copies of the Software, and to permit persons to whom the Software is
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%%% furnished to do so, subject to the following conditions:
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%%%
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%%% The above copyright notice and this permission notice shall be included in all
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%%% copies or substantial portions of the Software.
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%%%
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%%% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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%%% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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%%% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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%%% AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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%%% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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%%% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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%%% SOFTWARE.
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%%%-----------------------------------------------------------------------------
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%%% @doc
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%%% emqttd system monitor.
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%%%
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%%% @end
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%%%-----------------------------------------------------------------------------
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%%TODO: this is a demo module....
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-module(emqttd_sysmon).
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-author("Feng Lee <feng@emqtt.io>").
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-behavior(gen_server).
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-export([start_link/0]).
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-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
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terminate/2, code_change/3]).
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-record(state, {}).
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%%------------------------------------------------------------------------------
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%% @doc Start system monitor
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%% @end
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%%------------------------------------------------------------------------------
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-spec start_link() -> {ok, pid()} | ignore | {error, term()}.
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start_link() ->
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gen_server:start_link({local, ?MODULE}, ?MODULE, [], []).
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%%%=============================================================================
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%%% gen_server callbacks
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%%%=============================================================================
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init([]) ->
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erlang:system_monitor(self(), [{long_gc, 5000},
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{large_heap, 8 * 1024 * 1024},
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busy_port]),
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{ok, #state{}}.
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handle_call(Request, _From, State) ->
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lager:error("Unexpected request: ~p", [Request]),
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{reply, {error, unexpected_request}, State}.
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handle_cast(Msg, State) ->
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lager:error("unexpected msg: ~p", [Msg]),
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{noreply, State}.
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handle_info({monitor, GcPid, long_gc, Info}, State) ->
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lager:error("long_gc: gcpid = ~p, ~p ~n ~p", [GcPid, process_info(GcPid,
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[registered_name, memory, message_queue_len,heap_size,total_heap_size]), Info]),
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{noreply, State};
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handle_info({monitor, GcPid, large_heap, Info}, State) ->
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lager:error("large_heap: gcpid = ~p,~p ~n ~p", [GcPid, process_info(GcPid,
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[registered_name, memory, message_queue_len,heap_size,total_heap_size]), Info]),
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{noreply, State};
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handle_info({monitor, SusPid, busy_port, Port}, State) ->
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lager:error("busy_port: suspid = ~p, port = ~p", [process_info(SusPid,
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[registered_name, memory, message_queue_len,heap_size,total_heap_size]), Port]),
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{noreply, State};
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handle_info(Info, State) ->
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lager:error("Unexpected info: ~p", [Info]),
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{noreply, State}.
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terminate(_Reason, _State) ->
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ok.
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code_change(_OldVsn, State, _Extra) ->
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{ok, State}.
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