Introduction to the Flow Library for Application Logic and Deployment Separation

The flow library enables a strict separation application logic from the deployment concerns of topology, execution, communication, lifecycle, monitoring and error handling.

You provide logic to flow in the form of step-fns, which are wrapped into running processes, executing in a loop.

Flow manages the life cycle of the process and handles incoming and outgoing messages by putting or taking them on channels.

Step-fns do not access channels directly or hold state, making them easy to test in isolation and reuse.