iilyak commented on a change in pull request #3766:
URL: https://github.com/apache/couchdb/pull/3766#discussion_r731740470
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File path: src/smoosh/src/smoosh_priority_queue.erl
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@@ -73,14 +113,53 @@ info(#priority_queue{tree=Tree}=Q) ->
[{min, Min}, {max, Max}]
end].
+from_list(Orddict, #priority_queue{name=Name}) ->
+ Map = maps:from_list(Orddict),
+ Tree = gb_trees:from_orddict(Orddict),
+ #priority_queue{name=Name, map=Map, tree=Tree}.
+
+to_list(#priority_queue{tree=Tree}) ->
+ gb_trees:to_list(Tree).
+
+file_name(#priority_queue{name=Name}) ->
+ filename:join(".", Name ++ ".queue").
+
truncate(infinity, Q) ->
Q;
truncate(Capacity, Q) when Capacity > 0 ->
truncate(Capacity, ?MODULE:size(Q), Q).
truncate(Capacity, Size, Q) when Size =< Capacity ->
+ write_to_file(Q),
Q;
-truncate(Capacity, Size, #priority_queue{dict=Dict, tree=Tree}) when Size > 0
->
+truncate(Capacity, Size, #priority_queue{name=Name, map=Map, tree=Tree}) when
Size > 0 ->
{_, {Key, _}, Tree1} = gb_trees:take_smallest(Tree),
- Q1 = #priority_queue{dict=dict:erase(Key, Dict), tree=Tree1},
+ Q1 = #priority_queue{name=Name, map=maps:remove(Key, Map), tree=Tree1},
truncate(Capacity, ?MODULE:size(Q1), Q1).
+
+do_open(FilePath) ->
+ case file:read_file(FilePath) of
+ {ok, Content} ->
+ <<Vsn, Binary/binary>> = Content,
+ try parse_queue(Vsn, ?VSN, Binary) of
+ Bin ->
+ file:delete(FilePath),
+ {ok, Bin}
+ catch
+ error:_ ->
+ couch_log:notice(
+ "Invalid queue file. Deleting: ~p...", [FilePath]),
+ file:delete(FilePath),
+ {error}
+ end;
+ {error, _} ->
+ couch_log:notice(
+ "Cannot read the queue file. Deleting: ~p...", [FilePath]),
Review comment:
It would be better to log the reason.
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