119 lines
4.3 KiB
Erlang
119 lines
4.3 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 event manager.
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%%%
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%%% @end
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%%%-----------------------------------------------------------------------------
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-module(emqttd_event).
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-author("Feng Lee <feng@emqtt.io>").
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-include_lib("emqtt/include/emqtt.hrl").
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%% API Function Exports
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-export([start_link/0, add_handler/2, notify/1]).
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%% gen_event Function Exports
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-export([init/1, handle_event/2, handle_call/2, handle_info/2,
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terminate/2, code_change/3]).
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-record(state, {systop}).
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%%------------------------------------------------------------------------------
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%% @doc Start event manager
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%% @end
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%%------------------------------------------------------------------------------
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-spec start_link() -> {ok, pid()} | {error, any()}.
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start_link() ->
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case gen_event:start_link({local, ?MODULE}) of
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{ok, Pid} ->
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add_handler(?MODULE, []),
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{ok, Pid};
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{error, Reason} ->
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{error, Reason}
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end.
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add_handler(Handler, Args) ->
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gen_event:add_handler(?MODULE, Handler, Args).
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notify(Event) ->
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gen_event:notify(?MODULE, Event).
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%%%=============================================================================
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%%% gen_event callbacks
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%%%=============================================================================
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init([]) ->
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SysTop = list_to_binary(lists:concat(["$SYS/brokers/", node(), "/"])),
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{ok, #state{systop = SysTop}}.
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handle_event({connected, ClientId, Params}, State = #state{systop = SysTop}) ->
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Topic = <<SysTop/binary, "clients/", ClientId/binary, "/connected">>,
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Msg = #mqtt_message{topic = Topic, payload = payload(connected, Params)},
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emqttd_pubsub:publish(event, Msg),
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{ok, State};
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handle_event({disconnectd, ClientId, Reason}, State = #state{systop = SysTop}) ->
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Topic = <<SysTop/binary, "clients/", ClientId/binary, "/disconnected">>,
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Msg = #mqtt_message{topic = Topic, payload = payload(disconnected, Reason)},
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emqttd_pubsub:publish(event, Msg),
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{ok, State};
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handle_event({subscribed, ClientId, TopicTable}, State) ->
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lager:error("TODO: subscribed ~s, ~p", [ClientId, TopicTable]),
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{ok, State};
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handle_event({unsubscribed, ClientId, Topics}, State) ->
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lager:error("TODO: unsubscribed ~s, ~p", [ClientId, Topics]),
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{ok, State};
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handle_event(_Event, State) ->
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{ok, State}.
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handle_call(_Request, State) ->
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Reply = ok,
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{ok, Reply, State}.
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handle_info(_Info, State) ->
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{ok, 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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%%%=============================================================================
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%%% Internal functions
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%%%=============================================================================
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payload(connected, Params) ->
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From = proplists:get_value(from, Params),
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Proto = proplists:get_value(protocol, Params),
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Sess = proplists:get_value(session, Params),
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iolist_to_binary(io_lib:format("from: ~s~nprotocol: ~p~nsession: ~s", [From, Proto, Sess]));
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payload(disconnected, Reason) ->
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list_to_binary(io_lib:format("reason: ~p", [Reason])).
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