Webflux demo: SensorData

Demo project with Spring Webflux, MongoDB and Node.js Publisher

Repository branches

Branches in the repository show different implementation variants:

main: Webflux backend + Server-Sent Events (SSE) + Thymeleaf client
websockets-based-implementation: Webflux backend + Websockets + Thymeleaf client
graphql-api-with-subscription: Webflux backend + Subscription via GraphQL-API
vue-frontend: Webflux backend + Server-Sent Events (SSE) + Vue.js client

Install and start MongoDB

Install MongoDB according to the documentation: https://docs.mongodb.com/manual/administration/install-community/
A DB webflux-demo with a capped collection sensors is expected (size 500000 bytes) → create if necessary (e.g. via MongoDB Compass)

Mock sensors

Start the node script mockSensor/index.js → the script continuously fills the database with "sensor data" until it is terminated

Webflux backend

The backend works with Spring Webflux, Netty and Thymeleaf. It can be started via the class /webflux-demo/src/main/java/en/fhdo/webfluxdemo/SensorDataApp.java or via mvn spring-boot:run.

Start and test

Start mock sensor and Webflux backend
Test server-side rendered view: http://localhost:8080/sensor/list
Test REST-API: curl -H "Accept: text/event-stream" http://localhost:8080/sensor/api/temperature

Clean up MongoDB

No data records can be deleted from capped collections, so the collection must be dropped and recreated!