Proposal Redis DB Adapter

Hello community!

As discussed with @ericyhwang in the issue https://github.com/share/sharedb/issues/266, we took the time to isolate and build an open source Redis Adapter for ShareDB 🎉

Github repository: https://github.com/Wisembly/sharedb-redis
NPM Package: https://www.npmjs.com/package/sharedb-redis-adapter

This package uses the atomic Redis EVAL method to both:

• Check and reject the commit if the version (score) already exists in the ops collection
• Persist the op into the ops collection using ZADD

This usage was born from the reflexions and the discussions around the issue #266. We faced a multi-user collaboration issue when people interact on the same document at very high pace (typing pace ~150-200ms per action). We are using this adapter in production for several months now and we’re pretty happy and confident about it.

What do you think about the package ? Let me know what we have to do to be fully integrated into your environment

Are at Wisembly Jam, we love Sharedb. We are proud of our meeting editor and everything was possible because of your work. We're willing to invest time and passion into this adapter to help your community and improve the experience of using sharedb.

Read issue #266 and the linked sharedb-redis repository and NPM package first; this issue names no files or tests. Done would be a maintainer decision on whether and how the Redis adapter should be integrated into ShareDB, with the required integration scope identified.