What is the Azure Functions : Article 06

This is the the first article for my Real Time Dashboard with Kafka+Spring-boot+Angular+Azure article series. If you missed third arcticle please read the What is the Azure App services here.

Azure Functions

Azure Function

When we are developing applications, it is need to be trigger some process or get data. Rather using traditional server based request, Azure function is one of key player in the deployment.It is an event driven, compute-on-demand experience that extends the existing Azure application platform with capabilities to implement code triggered by events occurring in Azure or third party service as well as on-premises systems.

Here in my project I experimented Azure function for generate status of humidity latest data point. I used Linux based Java app to generate status.

Here is the article that I followed make test app. Link I think its better follow this, if you are new to azure functions.

Let’s begin. I assume that you already followed above arcticle. So I’m directly going to implementation and deployment.In order to make it success make sure local environment and azure app are in same JAVA version. I used Java 8.

Source code can be download here.

Step 01: Run below command your project folder location

mvn archetype:generate "-DarchetypeGroupId=com.microsoft.azure" "-DarchetypeArtifactId=azure-functions-archetype"

When its running, at the end it may request information like below

Project building locally

After go to the location folder and open with IDE to add coding implementation. For here I used Visual Studio Code.

Open the project with VS code

Project Structure

you can see the file called Function.java. Here you have to implement the function.

In project building sample code will be generated. You can simply run and check weather it working or not. If its working locally, You can implement your own method.

Function running locally

If it works fine,you can see above output. Then you can check with browser or curl request.

In the implementation, i just modify the end point like below.

Humidity checking

After the implementation please build and run locally.If its wok fine, you can deploy to azure.

Using the extension of Azure Function

Deploying

Deploying

After deployment completed, it will show the below message.

After you can check with your app service URL.

Trigger The function

Another important thing is you have to config CORS in app configuration.Otherwise it will not allowed to access through frontend. You have to config frontend config server.

Allow CORS for access the function.

That’s it. Let’s see the seventh arcticle relate to this project

Azure Database for MySQL server

Thank you.