andrewmacmurray/order-taking-service

An Elm implementation of the example from "Domain Modelling made Functional"

Order Taking Service

An 'Order Taking Service' adapted from an F# example in Domain Modeling Made Functional into Elm

What is it?

• A TypeScript Apollo Graphql Server
• An embedded Elm worker program (the Domain Brain!)

The server implements a single Mutation: placeOrder which runs a number of validations on the input, calls some fake services and returns either the recorded PlaceOrderEvents or Errors that occur.

How to run it

install dependencies

> npm install

bundle the server

> npm run build

start the server with

> npm run serve

Visit the graphiql playground at http://localhost:4000 to try out the service.