Use AppRun with Dapr

Welcome to the world of AppRun, microservices, CQRS, and Dapr. This is a demonstration of using AppRun with microservices built with Dapr.

• AppRun is a JavaScript library that uses the Elm-inspired architecture, events, and components.
• Dapr is a portable, serverless, event-driven runtime for building resilient, stateless and stateful microservices.

How It Works

Fornt End

The front end is a SPA built with AppRun has three pages, in which there are a counter app page and a todo app page.

Counter App Page

Todo App Page

Backend

The backend microservices are built with Dapr, which includes,

• a service to perform the add calculation for the counter
• a state service to save app states to Dapr state store
• a todo app service that saves a todo list to redis
• a todo stream service that saves a todo list to redis stream
• a todo sql service that saves a todo list to sql database

Architecture

Because AppRun is event-driven, We can connect AppRun events to Dapr PubSub through WebSockets.

Getting Started

Install Dapr CLI and Initialize Dapr if you haven't.

Run in terminal:

npm install
npm start

• Run the Frontend App http://localhost:8000
• Run the Dapr Dashboard http://localhost:8080
• Run the Zipkin http://localhost:9411

Watch messages in the server console and browser console.

Have fun.

(C) 2021 Yiyi Sun