Refreshing Configuration Properties From App Configuration in Spring Boot Application using Entra ID

04/11/2025

Prerequisite

A Java Development Kit (JDK), version 8.
Apache Maven, version 3.0 or later.

How to run

Setup your App Configuration Store

To create your Azure App Configuration store, you can use:

az appconfig create --resource-group <your-resource-group> --name <name-of-your-new-store> --sku Standard

Create the test key in your new store:

az appconfig kv set --key /application/config.message --value testKey --name <name-of-your-new-store> --yes

Create monitor trigger.

az appconfig kv set --key sentinel --value 1 --name <name-of-your-new-store> --yes

This value should match the spring.cloud.azure.appconfiguration.stores[0].monitoring.triggers[0].key value in bootstrap.properties.

Setup your environment

Set an environment variable named APP_CONFIGURATION_ENDPOINT, and set it to the endpoint to your App Configuration store. At the command line, run the following command and restart the command prompt to allow the change to take effect:
```
setx APP_CONFIGURATION_ENDPOINT "endpoint-of-your-app-configuration-store"
```
If you use Windows PowerShell, run the following command:
```
$Env:APP_CONFIGURATION_ENDPOINT = "endpoint-of-your-app-configuration-store"
```
If you use macOS or Linux, run the following command:
```
export APP_CONFIGURATION_ENDPOINT='endpoint-of-your-app-configuration-store'
```

Run the application

Build the application
```
mvn clean package
```
Run the application
```
mvn spring-boot:run
```
Go to localhost:8080 which will display the value testKey.

Update key to new value.

az appconfig kv set --key /application/config.message --value updatedTestKey --name <name-of-your-new-store> --yes

Update monitor trigger, to trigger refresh.

az appconfig kv set --key sentinel --value 2 --name <name-of-your-new-store> --yes

Refresh page, this will trigger the refresh update.
After a couple seconds refresh again, this time the new value updatedTestKey will show.

Deploy to Azure Spring Apps

Now that you have the Spring Boot application running locally, it's time to move it to production. Azure Spring Apps makes it easy to deploy Spring Boot applications to Azure without any code changes. The service manages the infrastructure of Spring applications so developers can focus on their code. Azure Spring Apps provides lifecycle management using comprehensive monitoring and diagnostics, configuration management, service discovery, CI/CD integration, blue-green deployments, and more. To deploy your application to Azure Spring Apps, see Deploy your first application to Azure Spring Apps.

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