1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
-module(gs1).
-vsn(2).
-behaviour(gen_server).
-export([get_data/0, get_time/0]).
-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
terminate/2, code_change/3]).
-record(state, {data, time}).
get_data() ->
gen_server:call(gs1, get_data).
get_time() ->
gen_server:call(gs1, get_time).
init([Data]) ->
{ok, #state{data = Data, time = erlang:time()}}.
handle_call(get_data, _From, State) ->
{reply, {ok, State#state.data}, State};
handle_call(get_time, _From, State) ->
{reply, {ok, State#state.time}, State}.
handle_cast(_Request, State) ->
{noreply, State}.
handle_info(_Info, State) ->
{noreply, State}.
terminate(_Reason, _State) ->
ok.
code_change(1, {state, Data}, _Extra) ->
{ok, #state{data = Data, time = erlang:time()}};
code_change({down, 1}, #state{data = Data}, _Extra) ->
{ok, {state, Data}}.
|
