Raffle App

This is a simple raffle application built with .NET 8.0 ASP.NET Razor pages. It allows users to enter a raffle and randomly selects winners from the participants based on settings in a feature flag. The application demonstrates how to use Azure App Configuration to control and monitor feature rollouts.

Setup

Follow these steps to configure and run the Raffle App.

1. Provision an App Configuration store and an Application Insights instance. Create following environment variables.

   AZURE_APPCONFIGURATION_ENDPOINT="The endpoint of your Azure App Configuration"
   APPLICATIONINSIGHTS_CONNECTION_STRING="The connection string of your Application Insights"

2. Navigate to your App Configuration store in the Azure portal. Select Telemetry -> Application Insights and link your Application Insights instance to the App Configuration store.

3. Navigate to Operations -> Feature manager in the Azure portal and create a feature flag named Raffle with the following configuration. This feature flag uses variant allocation to randomly distribute winners (10%) and non-winners (90%) among raffle participants. Make sure to enable telemetry to monitor the raffle progress.

   {
   	"id": "Raffle",
   	"description": "Raffle for All-hands 2025",
   	"enabled": true,
   	"variants": [
   		{
   			"name": "Winner",
   			"configuration_value": "🎊 Boom! You're one of our lucky winners! 🎊"
   		},
   		{
   			"name": "NonWinner",
   			"configuration_value": "Not a winner this time, but YOU'RE still a star! ⭐"
   		}
   	],
   	"allocation": {
   		"percentile": [
   			{
   				"variant": "Winner",
   				"from": 0,
   				"to": 10
   			},
   			{
   				"variant": "NonWinner",
   				"from": 10,
   				"to": 100
   			}
   		],
   		"default_when_enabled": "NonWinner",
   		"default_when_disabled": "NonWinner"
   	},
   	"telemetry": {
   		"enabled": true
   	}
   }

Simulate raffle entries

To simulate raffle entries, you can use the RaffleAppSimulator project included in the solution. This console application will send multiple requests to the Raffle App, simulating different users entering the raffle.

Monitor telemetry

Navigate to the Telemetry tab of the Raffle feature flag in the Azure portal to monitor the distribution of winners and non-winners in real-time.