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elector

0.3.0
0.3.3 0.3.2 0.3.1 0.3.0 0.2.2 0.2.1 0.2.0 0.1.1 0.1.0

Elects master node from Erlang/Elixir cluster that is agreed by all nodes.

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elector src elector_candidate.erl
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src/elector_candidate.erl 

%%%-----------------------------------------------------------------------------

%% @doc Candidate process.

%%

%% @private

%% @end

%%%-----------------------------------------------------------------------------

-module(elector_candidate).



%%------------------------------------------------------------------------------

%% Behaviours

%%------------------------------------------------------------------------------

-behaviour(gen_server).



%%------------------------------------------------------------------------------

%% Exported API

%%------------------------------------------------------------------------------

-export([start_link/0]).

-export([init/1, handle_info/2, handle_cast/2, handle_call/3]).



%%------------------------------------------------------------------------------

%% Exported functions

%%------------------------------------------------------------------------------

start_link() ->

    gen_server:start_link({local, ?MODULE}, ?MODULE, [], []).



%%------------------------------------------------------------------------------

%% Callback functions

%%------------------------------------------------------------------------------

init(_) ->

    {ok, #{is_candidate => elector_config_handler:candidate_node()}}.



handle_info(_Msg, State) ->

    {noreply, State}.



handle_cast(_Msg, State) ->

    {noreply, State}.



handle_call(update_state, _From, State) ->

    {reply, ok, maps:put(is_candidate, elector_config_handler:candidate_node(), State)};

handle_call(is_candidate_node, _From, #{is_candidate := IsCandidate} = State) ->

    {reply, {ok, IsCandidate}, State};

handle_call(_Msg, _From, State) ->

    {reply, ok, State}.