Consistently use singular names for Khepri projections

deps/rabbit/src/rabbit_db_binding.erl

@@ -53,7 +53,7 @@
 -define(MNESIA_SEMI_DURABLE_TABLE, rabbit_semi_durable_route).
 -define(MNESIA_REVERSE_TABLE, rabbit_reverse_route).
 -define(MNESIA_INDEX_TABLE, rabbit_index_route).
--define(KHEPRI_BINDINGS_PROJECTION, rabbit_khepri_bindings).
+-define(KHEPRI_BINDINGS_PROJECTION, rabbit_khepri_binding).
 -define(KHEPRI_INDEX_ROUTE_PROJECTION, rabbit_khepri_index_route).
 
 %% -------------------------------------------------------------------

deps/rabbit/src/rabbit_db_rtparams.erl

@@ -23,8 +23,8 @@
         ]).
 
 -define(MNESIA_TABLE, rabbit_runtime_parameters).
--define(KHEPRI_GLOBAL_PROJECTION, rabbit_khepri_global_rtparams).
--define(KHEPRI_VHOST_PROJECTION, rabbit_khepri_per_vhost_rtparams).
+-define(KHEPRI_GLOBAL_PROJECTION, rabbit_khepri_global_rtparam).
+-define(KHEPRI_VHOST_PROJECTION, rabbit_khepri_per_vhost_rtparam).
 -define(any(Value), case Value of
                         '_' -> ?KHEPRI_WILDCARD_STAR;
                         _ -> Value

deps/rabbit/src/rabbit_db_user.erl

@@ -75,8 +75,8 @@
 -define(MNESIA_TABLE, rabbit_user).
 -define(PERM_MNESIA_TABLE, rabbit_user_permission).
 -define(TOPIC_PERM_MNESIA_TABLE, rabbit_topic_permission).
--define(KHEPRI_USERS_PROJECTION, rabbit_khepri_users).
--define(KHEPRI_PERMISSIONS_PROJECTION, rabbit_khepri_user_permissions).
+-define(KHEPRI_USERS_PROJECTION, rabbit_khepri_user).
+-define(KHEPRI_PERMISSIONS_PROJECTION, rabbit_khepri_user_permission).
 
 %% -------------------------------------------------------------------
 %% create().

deps/rabbit/src/rabbit_khepri.erl

@@ -1107,14 +1107,23 @@ collect_payloads(Props, Acc0) when is_map(Props) andalso is_list(Acc0) ->
               Acc
       end, Acc0, Props).
 
--spec unregister_all_projections() -> Ret when
+-spec unregister_legacy_projections() -> Ret when
       Ret :: ok | timeout_error().
+%% @doc Unregisters any projections which were registered in RabbitMQ 3.13.x
+%% versions.
+%%
+%% In 3.13.x until 3.13.8 we mistakenly registered these projections even if
+%% Khepri was not enabled. This function is used by the `khepri_db' enable
+%% callback to remove those projections before we register the ones necessary
+%% for 4.0.x.
+%%
+%% @private
 
-unregister_all_projections() ->
+unregister_legacy_projections() ->
     %% Note that we don't use `all' since `khepri_mnesia_migration' also
     %% creates a projection table which we don't want to unregister. Instead
-    %% we list all of the currently used projection names:
-    Names = [
+    %% we list all of the legacy projection names:
+    LegacyNames = [
         rabbit_khepri_exchange,
         rabbit_khepri_queue,
         rabbit_khepri_vhost,
@@ -1126,7 +1135,7 @@ unregister_all_projections() ->
         rabbit_khepri_index_route,
         rabbit_khepri_topic_trie
     ],
-    khepri:unregister_projections(?STORE_ID, Names).
+    khepri:unregister_projections(?STORE_ID, LegacyNames).
 
 register_projections() ->
     RegFuns = [fun register_rabbit_exchange_projection/0,
@@ -1181,21 +1190,21 @@ register_rabbit_vhost_projection() ->
     register_simple_projection(Name, PathPattern, KeyPos).
 
 register_rabbit_users_projection() ->
-    Name = rabbit_khepri_users,
+    Name = rabbit_khepri_user,
     PathPattern = rabbit_db_user:khepri_user_path(
                     _UserName = ?KHEPRI_WILDCARD_STAR),
     KeyPos = 2, %% #internal_user.username
     register_simple_projection(Name, PathPattern, KeyPos).
 
 register_rabbit_global_runtime_parameters_projection() ->
-    Name = rabbit_khepri_global_rtparams,
+    Name = rabbit_khepri_global_rtparam,
     PathPattern = rabbit_db_rtparams:khepri_global_rp_path(
                     _Key = ?KHEPRI_WILDCARD_STAR_STAR),
     KeyPos = #runtime_parameters.key,
     register_simple_projection(Name, PathPattern, KeyPos).
 
 register_rabbit_per_vhost_runtime_parameters_projection() ->
-    Name = rabbit_khepri_per_vhost_rtparams,
+    Name = rabbit_khepri_per_vhost_rtparam,
     PathPattern = rabbit_db_rtparams:khepri_vhost_rp_path(
                     _VHost = ?KHEPRI_WILDCARD_STAR_STAR,
                     _Component = ?KHEPRI_WILDCARD_STAR_STAR,
@@ -1204,7 +1213,7 @@ register_rabbit_per_vhost_runtime_parameters_projection() ->
     register_simple_projection(Name, PathPattern, KeyPos).
 
 register_rabbit_user_permissions_projection() ->
-    Name = rabbit_khepri_user_permissions,
+    Name = rabbit_khepri_user_permission,
     PathPattern = rabbit_db_user:khepri_user_permission_path(
                     _UserName = ?KHEPRI_WILDCARD_STAR,
                     _VHost = ?KHEPRI_WILDCARD_STAR),
@@ -1223,7 +1232,7 @@ register_rabbit_bindings_projection() ->
     ProjectionFun = projection_fun_for_sets(MapFun),
     Options = #{keypos => #route.binding},
     Projection = khepri_projection:new(
-                   rabbit_khepri_bindings, ProjectionFun, Options),
+                   rabbit_khepri_binding, ProjectionFun, Options),
     PathPattern = rabbit_db_binding:khepri_route_path(
                     _VHost = ?KHEPRI_WILDCARD_STAR,
                     _ExchangeName = ?KHEPRI_WILDCARD_STAR,
@@ -1543,7 +1552,7 @@ get_feature_state(Node) ->
 khepri_db_migration_enable(#{feature_name := FeatureName}) ->
     maybe
         ok ?= sync_cluster_membership_from_mnesia(FeatureName),
-        ok ?= unregister_all_projections(),
+        ok ?= unregister_legacy_projections(),
         ok ?= register_projections(),
         migrate_mnesia_tables(FeatureName)
     end.