iilyak commented on code in PR #5546:
URL: https://github.com/apache/couchdb/pull/5546#discussion_r2109704946
##########
src/dreyfus/src/clouseau_rpc.erl:
##########
@@ -316,3 +326,46 @@ rpc(Ref, Msg) ->
clouseau() ->
list_to_atom(config:get("dreyfus", "name", "[email protected]")).
+
+-type service() :: sup | main | analyzer | cleanup.
+-type liveness_status() :: alive | timeout.
+
+-spec clouseau_services(MajorVsn) -> [service()] when
+ MajorVsn :: binary() | null.
+clouseau_services(_MajorVsn) ->
+ [sup, main, analyzer, cleanup].
+
+-spec is_valid(Service) -> boolean() when
+ Service :: atom().
+is_valid(Service) when is_atom(Service) ->
+ lists:member(Service, clouseau_services(clouseau_major_vsn())).
+
+-spec check_service(Service) -> {service(), liveness_status()} | no_return()
when
+ Service :: service().
+check_service(Service) when is_list(Service) ->
+ check_service(list_to_atom(Service));
+check_service(Service) when is_atom(Service) ->
+ case is_valid(Service) of
+ true ->
+ Ref = make_ref(),
+ {Service, clouseau()} ! {ping, self(), Ref},
+ receive
+ {pong, Ref} ->
+ {Service, alive}
+ after ?TIMEOUT ->
+ {Service, timeout}
+ end;
+ false ->
+ NoService = atom_to_binary(Service),
+ throw({not_found, <<"no such service: ", NoService/binary>>})
+ end.
+
+-spec check_services() -> [{service(), liveness_status()}] | no_return().
Review Comment:
```
| throw(string())
```
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