syncem

https://github.com/yegor256/syncem

Sometimes you have an object that is not thread-safe, but you need to make sure each of its methods is thread-safe, because they deal with some resources, like files or databases and you want them to manage those resources sequentially. This small gem will help you achieve exactly that without any re-design of the objects you already have. Just decorate them with SyncEm decorator and that is it.