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authorVincent Ambo <tazjin@google.com>2019-12-21T00·38+0000
committerVincent Ambo <tazjin@google.com>2019-12-21T00·38+0000
commit8c5335a7b5871e6ce78a73103f383a7798442848 (patch)
tree19800cf7ebc316107cd23bbfba5aa37e9f87dced /presentations/erlang-2016/src/hello_server2.erl
parentfcf6ab2d9fc0b2081421885431f6c431087f0ff2 (diff)
parent8ab71587a7fe532785950ed9dbc2bcfa1acdfcc4 (diff)
merge(erlang-presentation): Merge at //presentations/erlang-2016 r/258
Diffstat (limited to 'presentations/erlang-2016/src/hello_server2.erl')
-rw-r--r--presentations/erlang-2016/src/hello_server2.erl36
1 files changed, 36 insertions, 0 deletions
diff --git a/presentations/erlang-2016/src/hello_server2.erl b/presentations/erlang-2016/src/hello_server2.erl
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+++ b/presentations/erlang-2016/src/hello_server2.erl
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+-module(hello_server2).
+-behaviour(gen_server).
+-compile(export_all).
+
+%%% Start callback for supervisor
+start_link() ->
+    gen_server:start_link({local, ?MODULE}, ?MODULE, [], []).
+
+%%% gen_server callbacks
+
+init([]) ->
+    {ok, sets:new()}.
+
+handle_call({greet, Name}, _From, State) ->
+    io:format("Hello ~s!~n", [Name]),
+    NewState = sets:add_element(Name, State),
+    {reply, ok, NewState};
+
+handle_call({bye, Name}, _From, State) ->
+    io:format("Goodbye ~s!~n", [Name]),
+    NewState = sets:del_element(Name, State),
+    {reply, ok, NewState}.
+
+terminate(normal, State) ->
+    [io:format("Goodbye ~s!~n", [Name]) || Name <- State],
+    ok.
+
+%%% Unused gen_server callbacks
+code_change(_OldVsn, State, _Extra) ->
+    {ok, State}.
+
+handle_info(_Info, State) ->
+    {noreply, State}.
+
+handle_cast(_Request, State) ->
+    {noreply, State}.