anchor.diff:  %%                                   {stop, Reason, State}
   %% @end
   %%--------------------------------------------------------------------
  -handle_info(trigger_task, State = #state{ name = Name, status = inactivated }) ->
  +handle_info(trigger_task, State = #state{ name = Name, status = Status }) when Status =:= inactivated ->
       lager:debug("Not Activated Task: ~ts", [Name]),
       {noreply, State};
  -handle_info(trigger_task, State = #state{ status = activated, command = Cmd }) ->
  +handle_info(trigger_task, State = #state{ name = Name, status = Status, command = Cmd }) when Status =:= activated ->
       %% TODO: need notice result to barile server?
       %% TODO: schedule checkes
       case execute_cmd(Cmd) of
           {ok, Output} ->
  -            lager:debug("Succeed to execute command( ~p ): ~p", [State#state.command, Output]);
  +            lager:debug("Succeed to execute command( ~p ): ~p", [State#state.command, Output]),
  +            {noreply, State};
           {Reason, Output} ->
  -            lager:error("Failed to execute command( ~p ): ~p", [State#state.command, Output]);
  -    end,
  -    {noreply, State};
  +            lager:error("Failed to execute command( ~p ): ~p", [State#state.command, Output])
  +            {noreply, State}
  +    end;
   handle_info(_Info, State) ->
       {noreply, State}.
   
  
positive.code: 
  %% API
  -export([start_link/3,
           activate/1,
           execute/1 %% for debug
          ]).
  
  %% gen_server callbacks
  
negative.code: %% @end
  %%--------------------------------------------------------------------
  handle_call({activate}, _From, State) ->
      {reply, ok, State#state{ status = activated }};
  handle_call({inactivate}, _From, State) ->
      {reply, ok, State#state{ status = inactivated }};
  handle_call(_Request, _From, State) ->
      Reply = ok,
      {reply, Reply, State}.
  