Add extra guards on couch_epi.erl functions
diff --git a/src/couch_epi.erl b/src/couch_epi.erl
index 2cb4a1a..cd0434f 100644
--- a/src/couch_epi.erl
+++ b/src/couch_epi.erl
@@ -70,67 +70,67 @@
-spec dump(Handle :: handle()) ->
[Config :: properties()].
-dump(Handle) ->
+dump(Handle) when Handle /= undefined ->
couch_epi_data_gen:get(Handle).
-spec get(Handle :: handle(), Key :: key()) ->
[Config :: properties()].
-get(Handle, Key) ->
+get(Handle, Key) when Handle /= undefined ->
couch_epi_data_gen:get(Handle, Key).
-spec get_value(Handle :: handle(), Subscriber :: app(), Key :: key()) ->
properties().
-get_value(Handle, Subscriber, Key) ->
+get_value(Handle, Subscriber, Key) when Handle /= undefined ->
couch_epi_data_gen:get(Handle, Subscriber, Key).
-spec by_key(Handle :: handle()) ->
[{Key :: key(), [{Source :: app(), properties()}]}].
-by_key(Handle) ->
+by_key(Handle) when Handle /= undefined ->
couch_epi_data_gen:by_key(Handle).
-spec by_key(Handle :: handle(), Key :: key()) ->
[{Source :: app(), properties()}].
-by_key(Handle, Key) ->
+by_key(Handle, Key) when Handle /= undefined ->
couch_epi_data_gen:by_key(Handle, Key).
-spec by_source(Handle :: handle()) ->
[{Source :: app(), [{Key :: key(), properties()}]}].
-by_source(Handle) ->
+by_source(Handle) when Handle /= undefined ->
couch_epi_data_gen:by_source(Handle).
-spec by_source(Handle :: handle(), Subscriber :: app()) ->
[{Key :: key(), properties()}].
-by_source(Handle, Subscriber) ->
+by_source(Handle, Subscriber) when Handle /= undefined ->
couch_epi_data_gen:by_source(Handle, Subscriber).
-spec keys(Handle :: handle()) ->
[Key :: key()].
-keys(Handle) ->
+keys(Handle) when Handle /= undefined ->
couch_epi_data_gen:keys(Handle).
-spec subscribers(Handle :: handle()) ->
[Subscriber :: app()].
-subscribers(Handle) ->
+subscribers(Handle) when Handle /= undefined ->
couch_epi_data_gen:subscribers(Handle).
-spec apply(Handle :: handle(), ServiceId :: atom(), Function :: atom(),
Args :: [term()], Opts :: apply_opts()) -> ok.
-apply(Handle, ServiceId, Function, Args, Opts) ->
+apply(Handle, ServiceId, Function, Args, Opts) when Handle /= undefined ->
couch_epi_functions_gen:apply(Handle, ServiceId, Function, Args, Opts).
-spec get_handle({ServiceId :: service_id(), Key :: key()}) -> handle();
@@ -144,21 +144,21 @@
-spec any(Handle :: handle(), ServiceId :: atom(), Function :: atom(),
Args :: [term()], Opts :: apply_opts()) -> boolean().
-any(Handle, ServiceId, Function, Args, Opts) ->
+any(Handle, ServiceId, Function, Args, Opts) when Handle /= undefined ->
Replies = apply(Handle, ServiceId, Function, Args, Opts),
[] /= [Reply || Reply <- Replies, Reply == true].
-spec all(Handle :: handle(), ServiceId :: atom(), Function :: atom(),
Args :: [term()], Opts :: apply_opts()) -> boolean().
-all(Handle, ServiceId, Function, Args, Opts) ->
+all(Handle, ServiceId, Function, Args, Opts) when Handle /= undefined ->
Replies = apply(Handle, ServiceId, Function, Args, Opts),
[] == [Reply || Reply <- Replies, Reply == false].
-spec is_configured(
Handle :: handle(), Function :: atom(), Arity :: pos_integer()) -> boolean().
-is_configured(Handle, Function, Arity) ->
+is_configured(Handle, Function, Arity) when Handle /= undefined ->
[] /= couch_epi_functions_gen:modules(Handle, Function, Arity).
