davisp commented on a change in pull request #2666: soft-deletion for database
URL: https://github.com/apache/couchdb/pull/2666#discussion_r400287905
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File path: src/fabric/src/fabric2_fdb.erl
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@@ -346,12 +351,97 @@ delete(#{} = Db) ->
} = ensure_current(Db),
DbKey = erlfdb_tuple:pack({?ALL_DBS, DbName}, LayerPrefix),
- erlfdb:clear(Tx, DbKey),
- erlfdb:clear_range_startswith(Tx, DbPrefix),
+ DoRecovery = fabric2_util:do_recovery(),
+ case DoRecovery of
+ true ->
+ Timestamp = list_to_binary(fabric2_util:iso8601_timestamp()),
+ DeletedDbKey = erlfdb_tuple:pack({?DELETED_DBS, DbName, Timestamp},
+ LayerPrefix),
+ case erlfdb:wait(erlfdb:get(Tx, DeletedDbKey)) of
+ not_found ->
+ erlfdb:set(Tx, DeletedDbKey, DbPrefix),
+ erlfdb:clear(Tx, DbKey);
+ _Val ->
+ erlang:error({deleted_database_exists, DbName})
+ end;
+ false ->
+ erlfdb:clear(Tx, DbKey),
+ erlfdb:clear_range_startswith(Tx, DbPrefix)
+ end,
bump_metadata_version(Tx),
ok.
+deleted_dbs_info(#{} = Db0) ->
+ #{
+ name := DbName,
+ tx := Tx,
+ layer_prefix := LayerPrefix
+ } = ensure_current(Db0, false),
+
+ DeletedDbKey = erlfdb_tuple:pack({?DELETED_DBS, DbName}, LayerPrefix),
Review comment:
Extra space after the`=` operator.
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