fitter

System component management library for Clojure.

^(beta)

Status

• [x] Start/stop system of components.
• [x] Mount running instances.
• [x] Suspend/resume components.
• [x] Parallel start/stop.

Terminology

• instance
  • something useful instantiated :-)
• component
  • describe how to initialize/destroy instance of something.
• registry
  • map of keys and components
• system
  • collection of dependent component instances.

Overview

• Components are just functions or maps with ::component/start /::component/stop! keys.
• Component start function receives system map with keys known in component registry. This map supports get operations only.
• The registry is a map of components where keys are unique and known in the system context. These keys are referred in component/start function argument.
• Dependencies are dynamic and built when component access system key in its start function.
• System state instance holds running component instances and used to start, stop and restart registered components.

Examples

• app-system
• How to log
• How to mount
• How to parallel
• How to spec
• How to suspend