Remove compatibility for flag direct_exchange_routing_v2

Remove compatibility code for feature flag direct_exchange_routing_v2
because this feature flag is required in 3.12.

See #7219

Author: ansd

deps/rabbit/src/rabbit_core_ff.erl

@@ -73,7 +73,6 @@
 -rabbit_feature_flag(
    {direct_exchange_routing_v2,
     #{desc       => "v2 direct exchange routing implementation",
-      %%TODO remove compatibility code
       stability  => required,
       depends_on => [feature_flags_v2, implicit_default_bindings]
      }}).

deps/rabbit/src/rabbit_db_binding.erl

@@ -643,7 +643,7 @@ delete(Tab, #index_route{} = Record, LockKind) ->
 %% types. This reduces write lock conflicts on the same tuple {SourceExchange, RoutingKey}
 %% reducing the number of restarted Mnesia transactions.
 should_index_table(#exchange{name = #resource{name = Name},
-                      type = direct})
+                             type = direct})
   when Name =/= <<>> ->
     true;
 should_index_table(_) ->
@@ -683,25 +683,10 @@ sync_route(Route, transient, ShouldIndexTable, Fun) ->
 sync_transient_route(Route, ShouldIndexTable, Fun) ->
     ok = Fun(?MNESIA_TABLE, Route, write),
     ok = Fun(?MNESIA_REVERSE_TABLE, rabbit_binding:reverse_route(Route), write),
-    sync_index_route(Route, ShouldIndexTable, Fun).
+    ok = sync_index_route(Route, ShouldIndexTable, Fun).
 
 sync_index_route(Route, true, Fun) ->
-    %% Do not block as blocking will cause a dead lock when
-    %% function rabbit_binding:populate_index_route_table/0
-    %% (i.e. feature flag migration) runs in parallel.
-    case rabbit_feature_flags:is_enabled(direct_exchange_routing_v2, non_blocking) of
-        true ->
-            ok = Fun(?MNESIA_INDEX_TABLE, rabbit_binding:index_route(Route), write);
-       false ->
-            ok;
-        state_changing ->
-            case rabbit_table:exists(?MNESIA_INDEX_TABLE) of
-                true ->
-                    ok = Fun(?MNESIA_INDEX_TABLE, rabbit_binding:index_route(Route), write);
-                false ->
-                    ok
-            end
-    end;
+    ok = Fun(?MNESIA_INDEX_TABLE, rabbit_binding:index_route(Route), write);
 sync_index_route(_, _, _) ->
     ok.
 

deps/rabbit/src/rabbit_exchange_type_direct.erl

@@ -33,11 +33,9 @@ serialise_events() -> false.
 
 route(#exchange{name = Name, type = Type},
       #delivery{message = #basic_message{routing_keys = Routes}}) ->
-    case {Type, rabbit_feature_flags:is_enabled(direct_exchange_routing_v2, non_blocking)} of
-        {direct, true} ->
-            route_v2(Name, Routes);
-        _ ->
-            rabbit_router:match_routing_key(Name, Routes)
+    case Type of
+        direct -> route_v2(Name, Routes);
+        _ -> rabbit_router:match_routing_key(Name, Routes)
     end.
 
 validate(_X) -> ok.

deps/rabbit/src/rabbit_table.erl

@@ -12,9 +12,7 @@
     wait_for_replicated/1, wait/1, wait/2,
     force_load/0, is_present/0, is_empty/0, needs_default_data/0,
     check_schema_integrity/1, clear_ram_only_tables/0, retry_timeout/0,
-    wait_for_replicated/0, exists/1]).
-
--export([rabbit_index_route_definition/0]).
+    wait_for_replicated/0]).
 
 %% for testing purposes
 -export([definitions/0]).
@@ -52,17 +50,6 @@ create(TableName, TableDefinition) ->
             throw({error, {table_creation_failed, TableName, TableDefinition1, Reason}})
     end.
 
--spec exists(atom()) -> boolean().
-exists(Table) ->
-    case mnesia:is_transaction() of
-        true ->
-            _ = mnesia_schema:get_tid_ts_and_lock(schema, read),
-            ok;
-        false ->
-            ok
-    end,
-    lists:member(Table, mnesia:system_info(tables)).
-
 %% Sets up secondary indexes in a blank node database.
 ensure_secondary_indexes() ->
   ensure_secondary_index(rabbit_queue, vhost),
@@ -356,6 +343,14 @@ definitions() ->
        {type, ordered_set},
        {match, #reverse_route{reverse_binding = reverse_binding_match(),
                               _='_'}}]},
+     {rabbit_index_route,
+      [{record_name, index_route},
+       {attributes, record_info(fields, index_route)},
+       {type, bag},
+       {storage_properties, [{ets, [{read_concurrency, true}]}]},
+       {match, #index_route{source_key = {exchange_name_match(), '_'},
+                            destination = binding_destination_match(),
+                            _='_'}}]},
      {rabbit_topic_trie_node,
       [{record_name, topic_trie_node},
        {attributes, record_info(fields, topic_trie_node)},
@@ -403,29 +398,13 @@ definitions() ->
         ++ gm:table_definitions()
         ++ mirrored_supervisor:table_definitions(),
 
-    MaybeRouting = case rabbit_feature_flags:is_enabled(direct_exchange_routing_v2) of
-                       true ->
-                           [{rabbit_index_route, rabbit_index_route_definition()}];
-                       false ->
-                           []
-                   end,
     MaybeListener = case rabbit_feature_flags:is_enabled(listener_records_in_ets) of
                         false ->
                             [{rabbit_listener, rabbit_listener_definition()}];
                         true ->
                             []
                     end,
-    Definitions ++ MaybeRouting ++ MaybeListener.
-
--spec rabbit_index_route_definition() -> list(tuple()).
-rabbit_index_route_definition() ->
-    [{record_name, index_route},
-     {attributes, record_info(fields, index_route)},
-     {type, bag},
-     {storage_properties, [{ets, [{read_concurrency, true}]}]},
-     {match, #index_route{source_key = {exchange_name_match(), '_'},
-                          destination = binding_destination_match(),
-                          _='_'}}].
+    Definitions ++ MaybeListener.
 
 rabbit_listener_definition() ->
     [{record_name, listener},