Singleton Storage Queue processing demonstration

Process the Azure storage queue messages one at the time via the azure function storage queue trigger

Setup

• Install & start the azure storage emulator https://docs.microsoft.com/en-us/azure/storage/common/storage-use-emulator
• Install & start the repository functions

npm install
npm start

• When the api is up execute the call script

node add-a-lot.js

Description:

• The add-a-lot.js script calls the http trigger AddOne 10 times.
• The AddOne function adds messages on each call from the request body to the storage queue in the azure storage emulator
• The storage queue triggered function DequeueOne consumes the messages one at the time and logs them every 4 seconds to the console ("!!!!!...")
• The queue concurrency is set via extensions.queues.batchSize = 1 in host.json (source)