Unidirectional data flow for Kotlin applications.
ReKotlin an implementation of the unidirectional data flow architecture in Kotlin. It is heavily inspired by Redux but adds some tweaks to the formula.
ReKotlin helps you to separate three important concerns of your app's components:
- State: The entire application state is explicitly modelled data. This helps avoid complicated state management code, enables better debugging, prevents statefulness, and has many, many more benefits...
- State Subscribers: The application updates when your state changes - be that UI, processing state or networking. The UI layer becomes simple, deterministic rendering of the current application state.
- State Changes: The only way to state changes is through actions. Actions are small pieces of data that describe a state change. By drastically limiting the way state can be mutated, your app becomes easier to understand and it gets easier to work with many collaborators.
ReKotlin relies on a few core concepts:
Storemaintains your entire app state in the form of a single data structure. This state can only be modified by dispatching Actions to the store. Whenever the state in the store changes, the store will notify all observers.Actionare a declarative way of describing a state change. Actions don't contain any code, they are consumed by the store (or rather its reducers).Reducerare pure functions, implement the state transitinon on the current action and the current app state, creating the next app state
This repository is a collection of libraries that implement and leverage the unidirectional-data-flow model, checkout the sub directories for more detail:
- ReKotlin: Implementation of the core concept
- ReKotlin-Router: A routing library on top of ReKotlin, for expressive URL-like routing
- Android Sample App: A sample illustrating how you can use ReKotlin and ReKotlin-Router in an android application.