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%%% Copyright (c) 2017, NORDUnet A/S.
%%% See LICENSE for licensing information.
-module(statusserver).
-export([init_module/0]).
%% API (URL)
-export([request/4]).
-define(APPURL_PLOP_STATUS, "plop/v1/status").
request(post, ?APPURL_PLOP_STATUS, Service, Input) ->
case (catch mochijson2:decode(Input)) of
{error, E} ->
html("bad input:", E);
Entries when is_list(Entries) ->
lists:foreach(fun ({struct, PropList}) ->
Target = proplists:get_value(<<"target">>, PropList),
Source = proplists:get_value(<<"source">>, PropList),
Variable = proplists:get_value(<<"key">>, PropList),
Status = proplists:get_value(<<"value">>, PropList),
set_status(Service, Source, Target, Variable, Status)
end, Entries)
end,
success({[{result, <<"ok">>}]});
request(get, "", "status", Input) ->
Now = plop_compat:monotonic_time(millisecond),
Variables = [{struct, [
{service, list_to_binary(Service)},
{source, Source},
{target, Target},
{variable, Variable},
{status, Status},
{age, (Now - Timestamp) / 1000}
]} || {{Service, Source, Target, Variable}, Status, Timestamp} <- get_status()],
success({[{result, Variables}]}).
success(Data) ->
{200, [{"Content-Type", "text/json"}, {"Access-Control-Allow-Origin", "*"}], mochijson2:encode(Data)}.
html(Text, Input) ->
{400, [{"Content-Type", "text/html"}],
io_lib:format(
"<html><body><p>~n" ++
"~s~n" ++
"~p~n" ++
"</body></html>~n", [Text, Input])}.
-define(STATUSDB_TABLE, statusserver_statusdb).
init_module() ->
create_statusdb().
create_statusdb() ->
case ets:info(?STATUSDB_TABLE) of
undefined ->
ok;
_ ->
ets:delete(?STATUSDB_TABLE)
end,
ets:new(?STATUSDB_TABLE, [set, public, named_table]).
get_status() ->
[E || [E] <- ets:match(?STATUSDB_TABLE, '$1')].
set_status(Service, Source, Target, Variable, Status) ->
lager:info("status: ~p ~p ~p ~p ~p", [Service, Source, Target, Variable, Status]),
Timestamp = plop_compat:monotonic_time(millisecond),
true = ets:insert(?STATUSDB_TABLE,
{{Service, Source, Target, Variable}, Status, Timestamp}),
ok.
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