etsgive_srv.erl

-module(etsgive_srv).

-behaviour(gen_server).

%% API
-export([start_link/0, 
         check/0,
         count/0, die/0]).

%% gen_server callbacks
-export([init/1,
         handle_call/3,
         handle_cast/2,
         handle_info/2,
         terminate/2,
         code_change/3]).

-define(SERVER, ?MODULE).

-record(state, {init=true, table_id}).

%%%===================================================================
%%% API
%%%===================================================================
check() ->
    gen_server:cast(?MODULE, check).

count() ->
    gen_server:cast(?MODULE, count).

die() ->
    gen_server:cast(?MODULE, die).

%%--------------------------------------------------------------------
%% @doc
%% Starts the server
%%
%% @spec start_link() -> {ok, Pid} | ignore | {error, Error}
%% @end
%%--------------------------------------------------------------------
start_link() ->
        gen_server:start_link({local, ?SERVER}, ?MODULE, [], []).

%%%===================================================================
%%% gen_server callbacks
%%%===================================================================

%%--------------------------------------------------------------------
%% @private
%% @doc
%% Initializes the server
%%
%% @spec init(Args) -> {ok, State} |
%%                     {ok, State, Timeout} |
%%                     ignore |
%%                     {stop, Reason}
%% @end
%%--------------------------------------------------------------------
init([]) ->
    {ok, #state{}}.

%%--------------------------------------------------------------------
%% @private
%% @doc
%% Handling call messages
%%
%% @spec handle_call(Request, From, State) ->
%%                                   {reply, Reply, State} |
%%                                   {reply, Reply, State, Timeout} |
%%                                   {noreply, State} |
%%                                   {noreply, State, Timeout} |
%%                                   {stop, Reason, Reply, State} |
%%                                   {stop, Reason, State}
%% @end
%%--------------------------------------------------------------------
handle_call(_Request, _From, State) ->
        Reply = ok,
        {reply, Reply, State}.

%%--------------------------------------------------------------------
%% @private
%% @doc
%% Handling cast messages
%%
%% @spec handle_cast(Msg, State) -> {noreply, State} |
%%                                  {noreply, State, Timeout} |
%%                                  {stop, Reason, State}
%% @end
%%--------------------------------------------------------------------
handle_cast(die, State) ->
        exit(killed),
        {noreply, State};
handle_cast(count, State) ->
        TableId = State#state.table_id,
        Result = ets:update_counter(TableId, count, 1),
        io:format("Counter: ~p~n", [Result]),
        {noreply, State};
handle_cast(check, State) ->
        TableId = State#state.table_id,
        io:format("TableId: ~p Data: ~p~n", [TableId, ets:tab2list(TableId)]),
        {noreply, State};
handle_cast(_Msg, State) ->
        {noreply, State}.

%%--------------------------------------------------------------------
%% @private
%% @doc
%% Handling all non call/cast messages
%%
%% @spec handle_info(Info, State) -> {noreply, State} |
%%                                   {noreply, State, Timeout} |
%%                                   {stop, Reason, State}
%% @end
%%--------------------------------------------------------------------
handle_info({'ETS-TRANSFER', TableId, Pid, _Data}, State) ->
    io:format("MGR(~p) -> SRV(~p) getting TableId: ~p~n", [Pid, self(), TableId]),
    {noreply, State#state{table_id=TableId}};
handle_info(_Info, State) ->
    {noreply, State}.

%%--------------------------------------------------------------------
%% @private
%% @doc
%% This function is called by a gen_server when it is about to
%% terminate. It should be the opposite of Module:init/1 and do any
%% necessary cleaning up. When it returns, the gen_server terminates
%% with Reason. The return value is ignored.
%%
%% @spec terminate(Reason, State) -> void()
%% @end
%%--------------------------------------------------------------------
terminate(_Reason, _State) ->
        ok.

%%--------------------------------------------------------------------
%% @private
%% @doc
%% Convert process state when code is changed
%%
%% @spec code_change(OldVsn, State, Extra) -> {ok, NewState}
%% @end
%%--------------------------------------------------------------------
code_change(_OldVsn, State, _Extra) ->
        {ok, State}.

%%%===================================================================
%%% Internal functions
%%%===================================================================