Async processing and callbacks #272
Description
Is your feature request related to a problem? Please describe.
A synchronous-only transformer makes many workflows impossible. Needing async logic in the process of a transformation is a frequent need.
- Import decisions based off async operations like network calls, file reads, db queries, user choices
- Acquiring fine-grained locks
Describe the solution you'd like
The process functions and just about every callback should be async.
Additional context
I mentioned this as a requirement in a past issue regarding locks, but I'd like to keep this one separate as it applies to a wider scope of problems and is a higher priority.