This package can be used as a drop-in replacement for classic-level and it uses rave-level and extends it with the few missing methods from ClassicLevel which aren't in RaveLevel. It also exports the class as ClassicLevel so it can be used with no change to the code. In order to make any project work with multiple clients trying to access the same classic-level database but without being hindered by the locking mechanism, we just need to replace the classic-level package in its node_modules folder. There are however a couple of restrictions:

• The two clients trying to access the same leveldb, must be running on the same machine, since rave-level uses unix sockets to communicate and they do not work in a distributed file storage system for example
• The file paths to the leveldb database must be the same in all instances (i.e: opening the same db). If you use symbolic links, it would cause the paths to be different and it would fail. Use fs.realpath on the location before opening it in that case
• This has been tested on Linux and Windows machines, and while we expect it to work just the same on macOS, it has not been tested
• The rave-level files get stored in /tmp (on linux) as we need to build a hash of the leveldb file location and use a short path due to unix socket's 108 character filename restriction.
• We do not currently have a method to delete these temporary files when the database is closed, so keep an eye on your /tmp folder in case it grows too much (we once ran out of inodes on a server as it had over 1.5 million leftover socket files)

To install, we use the following simple script:

rm -rf node_modules/classic-level && \
mv classic-rave node_modules/classic-level && \
(cd node_modules/classic-level && npm install)

This package was written by The Forge for use with Foundry Virtual Tabletop.