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Add ra:key_metrics/2 #461

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merged 1 commit into from
Jul 26, 2024
Merged

Add ra:key_metrics/2 #461

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22 changes: 18 additions & 4 deletions src/ra.erl
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Original file line number Diff line number Diff line change
Expand Up @@ -81,7 +81,8 @@
register_external_log_reader/1,
member_overview/1,
member_overview/2,
key_metrics/1
key_metrics/1,
key_metrics/2
]).

%% xref should pick these up
Expand Down Expand Up @@ -1212,7 +1213,20 @@ member_overview(ServerId, Timeout) ->
%%
%% @param ServerId the Ra server to obtain key metrics for
%% @end
key_metrics({Name, N} = ServerId) when N == node() ->
key_metrics(ServerId) ->
key_metrics(ServerId, ?DEFAULT_TIMEOUT).

%% @doc Returns a map of key metrics about a Ra member
%%
%% The keys and values may vary depending on what state
%% the member is in. This function will never call into the
%% Ra process itself so is likely to return swiftly even
%% when the Ra process is busy (such as when it is recovering)
%%
%% @param ServerId the Ra server to obtain key metrics for
%% @param Timeout The time to wait for the server to reply
%% @end
key_metrics({Name, N} = ServerId, _Timeout) when N == node() ->
Fields = [last_applied,
commit_index,
snapshot_index,
Expand All @@ -1239,8 +1253,8 @@ key_metrics({Name, N} = ServerId) when N == node() ->
membership => Membership}
end
end;
key_metrics({_, N} = ServerId) ->
erpc:call(N, ?MODULE, ?FUNCTION_NAME, [ServerId]).
key_metrics({_, N} = ServerId, Timeout) ->
erpc:call(N, ?MODULE, ?FUNCTION_NAME, [ServerId], Timeout).


%% internal
Expand Down
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