rabbit_fifo: tidy up and formatting

Author: kjnilsson

deps/rabbit/src/rabbit_fifo.erl

@@ -106,21 +106,6 @@
 -record(purge_nodes, {nodes :: [node()]}).
 -record(update_config, {config :: config()}).
 -record(garbage_collection, {}).
-%% v2 alternative commands
-%% each consumer is assigned an integer index which can be used
-%% instead of the consumer id to identify the consumer
--type consumer_idx() :: non_neg_integer().
-
--record(?SETTLE_V2, {consumer_idx :: consumer_idx(),
-                     msg_ids :: [msg_id()]}).
--record(?RETURN_V2, {consumer_idx :: consumer_idx(),
-                     msg_ids :: [msg_id()]}).
--record(?DISCARD_V2, {consumer_idx :: consumer_idx(),
-                      msg_ids :: [msg_id()]}).
--record(?CREDIT_V2, {consumer_idx :: consumer_idx(),
-                     credit :: non_neg_integer(),
-                     delivery_count :: non_neg_integer(),
-                     drain :: boolean()}).
 
 -opaque protocol() ::
     #enqueue{} |
@@ -134,12 +119,7 @@
     #purge{} |
     #purge_nodes{} |
     #update_config{} |
-    #garbage_collection{} |
-    % v2
-    #?SETTLE_V2{} |
-    #?RETURN_V2{} |
-    #?DISCARD_V2{} |
-    #?CREDIT_V2{}.
+    #garbage_collection{}.
 
 -type command() :: protocol() |
                    rabbit_fifo_dlx:protocol() |

deps/rabbit/src/rabbit_fifo_dlx.erl

@@ -29,10 +29,8 @@
          smallest_raft_index/1
         ]).
 
--record(checkout,{
-          consumer :: pid(),
-          prefetch :: non_neg_integer()
-         }).
+-record(checkout, {consumer :: pid(),
+                   prefetch :: non_neg_integer()}).
 -record(settle, {msg_ids :: [msg_id()]}).
 -type protocol() :: {dlx, #checkout{} | #settle{}}.
 -opaque state() :: #?MODULE{}.
@@ -93,16 +91,17 @@ stat(#?MODULE{consumer = Con,
 apply(_Meta, {dlx, #settle{msg_ids = MsgIds}}, at_least_once,
       #?MODULE{consumer = #dlx_consumer{checked_out = Checked0}} = State0) ->
     Acked = maps:with(MsgIds, Checked0),
-    State = maps:fold(fun(MsgId, ?TUPLE(_Rsn, ?MSG(Idx, _) = Msg),
-                          #?MODULE{consumer = #dlx_consumer{checked_out = Checked} = C,
-                                   msg_bytes_checkout = BytesCheckout,
-                                   ra_indexes = Indexes0} = S) ->
-                              Indexes = rabbit_fifo_index:delete(Idx, Indexes0),
-                              S#?MODULE{consumer = C#dlx_consumer{checked_out =
-                                                                  maps:remove(MsgId, Checked)},
-                                        msg_bytes_checkout = BytesCheckout - size_in_bytes(Msg),
-                                        ra_indexes = Indexes}
-                      end, State0, Acked),
+    State = maps:fold(
+              fun(MsgId, ?TUPLE(_Rsn, ?MSG(Idx, _) = Msg),
+                  #?MODULE{consumer = #dlx_consumer{checked_out = Checked} = C,
+                           msg_bytes_checkout = BytesCheckout,
+                           ra_indexes = Indexes0} = S) ->
+                      Indexes = rabbit_fifo_index:delete(Idx, Indexes0),
+                      S#?MODULE{consumer = C#dlx_consumer{checked_out =
+                                                          maps:remove(MsgId, Checked)},
+                                msg_bytes_checkout = BytesCheckout - size_in_bytes(Msg),
+                                ra_indexes = Indexes}
+              end, State0, Acked),
     {State, [{mod_call, rabbit_global_counters, messages_dead_lettered_confirmed,
               [rabbit_quorum_queue, at_least_once, maps:size(Acked)]}]};
 apply(_, {dlx, #checkout{consumer = Pid,

deps/rabbit/src/rabbit_fifo_dlx.hrl

@@ -4,20 +4,18 @@
 %%
 %% Copyright (c) 2007-2021 VMware, Inc. or its affiliates.  All rights reserved.
 
--record(dlx_consumer,{
-          pid :: pid(),
-          prefetch :: non_neg_integer(),
-          checked_out = #{} :: #{msg_id() => tuple(rabbit_dead_letter:reason(), msg())},
-          next_msg_id = 0 :: msg_id()
-         }).
+-record(dlx_consumer,
+        {pid :: pid(),
+         prefetch :: non_neg_integer(),
+         checked_out = #{} :: #{msg_id() => tuple(rabbit_dead_letter:reason(), msg())},
+         next_msg_id = 0 :: msg_id()}).
 
--record(rabbit_fifo_dlx,{
-          consumer :: option(#dlx_consumer{}),
-          %% Queue of dead-lettered messages.
-          discards = lqueue:new() :: lqueue:lqueue(tuple(rabbit_dead_letter:reason(), msg())),
-          %% Raft indexes of messages in both discards queue and dlx_consumer's checked_out map
-          %% so that we get the smallest ra index in O(1).
-          ra_indexes = rabbit_fifo_index:empty() :: rabbit_fifo_index:state(),
-          msg_bytes = 0 :: non_neg_integer(),
-          msg_bytes_checkout = 0 :: non_neg_integer()
-         }).
+-record(rabbit_fifo_dlx,
+        {consumer :: option(#dlx_consumer{}),
+         %% Queue of dead-lettered messages.
+         discards = lqueue:new() :: lqueue:lqueue(tuple(rabbit_dead_letter:reason(), msg())),
+         %% Raft indexes of messages in both discards queue and dlx_consumer's checked_out map
+         %% so that we get the smallest ra index in O(1).
+         ra_indexes = rabbit_fifo_index:empty() :: rabbit_fifo_index:state(),
+         msg_bytes = 0 :: non_neg_integer(),
+         msg_bytes_checkout = 0 :: non_neg_integer()}).