/
cassanderl_sup.erl
52 lines (36 loc) · 1.37 KB
/
cassanderl_sup.erl
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
37
38
39
40
41
42
43
44
45
46
47
48
-module(cassanderl_sup).
-behaviour(supervisor).
%% API
-export([start_link/0, pick_worker/0, call/2]).
%% Supervisor callbacks
-export([init/1]).
%% ===================================================================
%% API functions
%% ===================================================================
start_link() ->
supervisor:start_link({local, ?MODULE}, ?MODULE, []).
%% ===================================================================
%% Supervisor callbacks
%% ===================================================================
init([]) ->
{ok, Size} = application:get_env(cassanderl, worker_pool_size),
put(worker_pool_size, Size),
Workers = [ worker_spec(I) || I <- lists:seq(1, Size) ],
{ok, {{one_for_one, 10, 1}, Workers}}.
%% ===================================================================
%% Internal API
%% ===================================================================
worker_spec(N) ->
Name = list_to_atom("cassanderl_" ++ integer_to_list(N)),
{Name,
{cassanderl, start_link, [Name]},
permanent, 1000, worker,
[cassanderl]
}.
pick_worker() ->
random:seed(erlang:now()),
RandomN = random:uniform(get(worker_pool_size)),
list_to_existing_atom("cassanderl_" ++ integer_to_list(RandomN)).
call(Function, Args) ->
Worker = pick_worker(),
gen_server:call(Worker, {call, Function, Args}).