Remove compatibility for flag tracking_records_in_ets

Author: dcorbacho

deps/rabbit/src/rabbit_channel_tracking.erl

@@ -34,10 +34,6 @@
 
 -export([count_local_tracked_items_of_user/1]).
 
--ifdef(TEST).
--export([get_all_tracked_channel_table_names_for_node/1]).
--endif.
-
 -include_lib("rabbit_common/include/rabbit.hrl").
 
 -import(rabbit_misc, [pget/2]).
@@ -53,8 +49,6 @@
 -spec boot() -> ok.
 
 boot() ->
-    ensure_tracked_channels_table_for_this_node(),
-    ensure_per_user_tracked_channels_table_for_node(),
     clear_tracking_tables(),
     ok.
 
@@ -116,27 +110,14 @@ handle_cast({user_deleted, Details}) ->
     _ = timer:apply_after(?TRACKING_EXECUTION_TIMEOUT, ?MODULE,
             delete_tracked_channel_user_entry, [Username]),
     ok;
-handle_cast({node_deleted, Details}) ->
-    case rabbit_feature_flags:is_enabled(tracking_records_in_ets) of
-        true ->
-            ok;
-        false ->
-            Node = pget(node, Details),
-            rabbit_log_channel:info(
-              "Node '~ts' was removed from the cluster, deleting"
-              " its channel tracking tables...", [Node]),
-            delete_tracked_channels_table_for_node(Node),
-            delete_per_user_tracked_channels_table_for_node(Node)
-    end.
+handle_cast({node_deleted, _Details}) ->
+    ok.
 
 -spec register_tracked(rabbit_types:tracked_channel()) -> ok.
 -dialyzer([{nowarn_function, [register_tracked/1]}]).
 
 register_tracked(TrackedCh = #tracked_channel{node = Node}) when Node == node() ->
-    case rabbit_feature_flags:is_enabled(tracking_records_in_ets) of
-        true -> register_tracked_ets(TrackedCh);
-        false -> register_tracked_mnesia(TrackedCh)
-    end.
+    register_tracked_ets(TrackedCh).
 
 register_tracked_ets(TrackedCh = #tracked_channel{pid = ChPid, username = Username}) ->
     case ets:lookup(?TRACKED_CHANNEL_TABLE, ChPid) of
@@ -149,27 +130,9 @@ register_tracked_ets(TrackedCh = #tracked_channel{pid = ChPid, username = Userna
     end,
     ok.
 
-register_tracked_mnesia(TrackedCh =
-                            #tracked_channel{node = Node, name = Name, username = Username}) ->
-    ChId = rabbit_tracking:id(Node, Name),
-    TableName = tracked_channel_table_name_for(Node),
-    PerUserChTableName = tracked_channel_per_user_table_name_for(Node),
-    case mnesia:dirty_read(TableName, ChId) of
-      []    ->
-          mnesia:dirty_write(TableName, TrackedCh),
-          mnesia:dirty_update_counter(PerUserChTableName, Username, 1),
-            ok;
-      [#tracked_channel{}] ->
-          ok
-    end,
-    ok.
-
 -spec unregister_tracked_by_pid(pid()) -> any().
 unregister_tracked_by_pid(ChPid) when node(ChPid) == node() ->
-    case rabbit_feature_flags:is_enabled(tracking_records_in_ets) of
-        true -> unregister_tracked_by_pid_ets(ChPid);
-        false -> unregister_tracked_by_pid_mnesia(ChPid)
-    end.
+    unregister_tracked_by_pid_ets(ChPid).
 
 unregister_tracked_by_pid_ets(ChPid) ->
     case ets:lookup(?TRACKED_CHANNEL_TABLE, ChPid) of
@@ -179,27 +142,13 @@ unregister_tracked_by_pid_ets(ChPid) ->
             ets:delete(?TRACKED_CHANNEL_TABLE, ChPid)
     end.
 
-unregister_tracked_by_pid_mnesia(ChPid) ->
-    case get_tracked_channel_by_pid_mnesia(ChPid) of
-        []     -> ok;
-        [#tracked_channel{id = ChId, node = Node, username = Username}] ->
-            TableName = tracked_channel_table_name_for(Node),
-            PerUserChannelTableName = tracked_channel_per_user_table_name_for(Node),
-
-            mnesia:dirty_update_counter(PerUserChannelTableName, Username, -1),
-            mnesia:dirty_delete(TableName, ChId)
-    end.
-
 %% @doc This function is exported and implements a rabbit_tracking
 %% callback, however it is not used in rabbitmq-server any more. It is
 %% only kept for backwards compatibility if 3rd-party code would rely
 %% on it.
 -spec unregister_tracked(rabbit_types:tracked_channel_id()) -> ok.
 unregister_tracked(ChId = {Node, _Name}) when Node == node() ->
-    case rabbit_feature_flags:is_enabled(tracking_records_in_ets) of
-        true -> unregister_tracked_ets(ChId);
-        false -> unregister_tracked_mnesia(ChId)
-    end.
+    unregister_tracked_ets(ChId).
 
 unregister_tracked_ets(ChId) ->
     case get_tracked_channel_by_id_ets(ChId) of
@@ -209,23 +158,10 @@ unregister_tracked_ets(ChId) ->
             ets:delete(?TRACKED_CHANNEL_TABLE, ChPid)
     end.
 
-unregister_tracked_mnesia(ChId = {Node, _Name}) when Node =:= node() ->
-    TableName = tracked_channel_table_name_for(Node),
-    PerUserChannelTableName = tracked_channel_per_user_table_name_for(Node),
-    case mnesia:dirty_read(TableName, ChId) of
-        []     -> ok;
-        [#tracked_channel{username = Username}] ->
-            mnesia:dirty_update_counter(PerUserChannelTableName, Username, -1),
-            mnesia:dirty_delete(TableName, ChId)
-    end.
-
 -spec count_tracked_items_in({atom(), rabbit_types:username()}) -> non_neg_integer().
 
 count_tracked_items_in(Type) ->
-    case rabbit_feature_flags:is_enabled(tracking_records_in_ets) of
-        true -> count_tracked_items_in_ets(Type);
-        false -> count_tracked_items_in_mnesia(Type)
-    end.
+    count_tracked_items_in_ets(Type).
 
 count_tracked_items_in_ets({user, Username}) ->
     rabbit_tracking:count_on_all_nodes(
@@ -236,19 +172,10 @@ count_tracked_items_in_ets({user, Username}) ->
 count_local_tracked_items_of_user(Username) ->
     rabbit_tracking:read_ets_counter(?TRACKED_CHANNEL_TABLE_PER_USER, Username).
 
-count_tracked_items_in_mnesia({user, Username}) ->
-    rabbit_tracking:count_tracked_items_mnesia(
-        fun tracked_channel_per_user_table_name_for/1,
-        #tracked_channel_per_user.channel_count, Username,
-        "channels of user").
-
 -spec clear_tracking_tables() -> ok.
 
 clear_tracking_tables() ->
-    case rabbit_feature_flags:is_enabled(tracking_records_in_ets) of
-        true -> ok;
-        false -> clear_tracked_channel_tables_for_this_node()
-    end.
+    ok.
 
 -spec shutdown_tracked_items(list(), term()) -> ok.
 
@@ -267,53 +194,27 @@ list() ->
 -spec list_of_user(rabbit_types:username()) -> [rabbit_types:tracked_channel()].
 
 list_of_user(Username) ->
-    case rabbit_feature_flags:is_enabled(tracking_records_in_ets) of
-        true -> list_of_user_ets(Username);
-        false -> list_of_user_mnesia(Username)
-    end.
+    list_of_user_ets(Username).
 
 list_of_user_ets(Username) ->
     rabbit_tracking:match_tracked_items_ets(
       ?TRACKED_CHANNEL_TABLE,
       #tracked_channel{username = Username, _ = '_'}).
 
-list_of_user_mnesia(Username) ->
-    rabbit_tracking:match_tracked_items_mnesia(
-        fun tracked_channel_table_name_for/1,
-        #tracked_channel{username = Username, _ = '_'}).
-
 -spec list_on_node(node()) -> [rabbit_types:tracked_channel()].
+list_on_node(Node) when Node == node() ->
+    list_on_node_ets();
 list_on_node(Node) ->
-     case rabbit_feature_flags:is_enabled(tracking_records_in_ets) of
-        true when Node == node() ->
-            list_on_node_ets();
-        true ->
-            case rabbit_misc:rpc_call(Node, ?MODULE, list_on_node, [Node]) of
-                List when is_list(List) ->
-                    List;
-                _ ->
-                    []
-            end;
-        false ->
-            list_on_node_mnesia(Node)
+    case rabbit_misc:rpc_call(Node, ?MODULE, list_on_node, [Node]) of
+        List when is_list(List) ->
+            List;
+        _ ->
+            []
     end.
 
 list_on_node_ets() ->
     ets:tab2list(?TRACKED_CHANNEL_TABLE).
 
-list_on_node_mnesia(Node) ->
-    try mnesia:dirty_match_object(
-          tracked_channel_table_name_for(Node),
-          #tracked_channel{_ = '_'})
-    catch exit:{aborted, {no_exists, _}} ->
-            %% The table might not exist yet (or is already gone)
-            %% between the time rabbit_nodes:list_running() runs and
-            %% returns a specific node, and
-            %% mnesia:dirty_match_object() is called for that node's
-            %% table.
-            []
-    end.
-
 -spec tracked_channel_table_name_for(node()) -> atom().
 
 tracked_channel_table_name_for(Node) ->
@@ -330,114 +231,31 @@ ensure_tracked_tables_for_this_node() ->
     _ = ensure_per_user_tracked_channels_table_for_this_node_ets(),
     ok.
 
-%% internal
-ensure_tracked_channels_table_for_this_node() ->
-    case rabbit_feature_flags:is_enabled(tracking_records_in_ets) of
-        true ->
-            ok;
-        false ->
-            ensure_tracked_channels_table_for_this_node_mnesia()
-    end.
-
-ensure_per_user_tracked_channels_table_for_node() ->
-    case rabbit_feature_flags:is_enabled(tracking_records_in_ets) of
-        true ->
-            ok;
-        false ->
-            ensure_per_user_tracked_channels_table_for_this_node_mnesia()
-    end.
-
 %% Create tables
 ensure_tracked_channels_table_for_this_node_ets() ->
     rabbit_log:info("Setting up a table for channel tracking on this node: ~tp",
                     [?TRACKED_CHANNEL_TABLE]),
     ets:new(?TRACKED_CHANNEL_TABLE, [named_table, public, {write_concurrency, true},
                                      {keypos, #tracked_channel.pid}]).
 
-ensure_tracked_channels_table_for_this_node_mnesia() ->
-    Node = node(),
-    TableName = tracked_channel_table_name_for(Node),
-    case mnesia:create_table(TableName, [{record_name, tracked_channel},
-                                         {attributes, record_info(fields, tracked_channel)}]) of
-        {atomic, ok}                   ->
-            rabbit_log:info("Setting up a table for channel tracking on this node: ~tp",
-                            [TableName]),
-            ok;
-        {aborted, {already_exists, _}} ->
-            rabbit_log:info("Setting up a table for channel tracking on this node: ~tp",
-                            [TableName]),
-            ok;
-        {aborted, Error}               ->
-            rabbit_log:error("Failed to create a tracked channel table for node ~tp: ~tp", [Node, Error]),
-            ok
-    end.
-
 ensure_per_user_tracked_channels_table_for_this_node_ets() ->
     rabbit_log:info("Setting up a table for channel tracking on this node: ~tp",
                     [?TRACKED_CHANNEL_TABLE_PER_USER]),
     ets:new(?TRACKED_CHANNEL_TABLE_PER_USER, [named_table, public, {write_concurrency, true}]).
 
-ensure_per_user_tracked_channels_table_for_this_node_mnesia() ->
-    Node = node(),
-    TableName = tracked_channel_per_user_table_name_for(Node),
-    case mnesia:create_table(TableName, [{record_name, tracked_channel_per_user},
-                                         {attributes, record_info(fields, tracked_channel_per_user)}]) of
-        {atomic, ok}                   ->
-            rabbit_log:info("Setting up a table for channel tracking on this node: ~tp",
-                            [TableName]),
-            ok;
-        {aborted, {already_exists, _}} ->
-            rabbit_log:info("Setting up a table for channel tracking on this node: ~tp",
-                            [TableName]),
-            ok;
-        {aborted, Error}               ->
-            rabbit_log:error("Failed to create a per-user tracked channel table for node ~tp: ~tp", [Node, Error]),
-            ok
-    end.
-
-clear_tracked_channel_tables_for_this_node() ->
-    [rabbit_tracking:clear_tracking_table(T)
-        || T <- get_all_tracked_channel_table_names_for_node(node())].
-
-delete_tracked_channels_table_for_node(Node) ->
-    TableName = tracked_channel_table_name_for(Node),
-    rabbit_tracking:delete_tracking_table(TableName, Node, "tracked channel").
-
-delete_per_user_tracked_channels_table_for_node(Node) ->
-    TableName = tracked_channel_per_user_table_name_for(Node),
-    rabbit_tracking:delete_tracking_table(TableName, Node,
-        "per-user tracked channels").
-
-get_all_tracked_channel_table_names_for_node(Node) ->
-    [tracked_channel_table_name_for(Node),
-        tracked_channel_per_user_table_name_for(Node)].
-
 get_tracked_channels_by_connection_pid(ConnPid) ->
-    case rabbit_feature_flags:is_enabled(tracking_records_in_ets) of
-        true -> get_tracked_channels_by_connection_pid_ets(ConnPid);
-        false -> get_tracked_channels_by_connection_pid_mnesia(ConnPid)
-    end.
+    get_tracked_channels_by_connection_pid_ets(ConnPid).
 
 get_tracked_channels_by_connection_pid_ets(ConnPid) ->
     rabbit_tracking:match_tracked_items_local(
         ?TRACKED_CHANNEL_TABLE,
         #tracked_channel{connection = ConnPid, _ = '_'}).
 
-get_tracked_channels_by_connection_pid_mnesia(ConnPid) ->
-    rabbit_tracking:match_tracked_items_mnesia(
-        fun tracked_channel_table_name_for/1,
-        #tracked_channel{connection = ConnPid, _ = '_'}).
-
 get_tracked_channel_by_id_ets(ChId) ->
     rabbit_tracking:match_tracked_items_ets(
         ?TRACKED_CHANNEL_TABLE,
         #tracked_channel{id = ChId, _ = '_'}).
 
-get_tracked_channel_by_pid_mnesia(ChPid) ->
-    rabbit_tracking:match_tracked_items_mnesia(
-        fun tracked_channel_table_name_for/1,
-        #tracked_channel{pid = ChPid, _ = '_'}).
-
 delete_tracked_channel_user_entry(Username) ->
     rabbit_tracking:delete_tracked_entry(
       {rabbit_auth_backend_internal, exists, [Username]},