{"id":4093,"date":"2023-11-04T23:14:03","date_gmt":"2023-11-04T23:14:03","guid":{"rendered":"http:\/\/localhost:10003\/building-event-driven-serverless-applications-with-azure-event-grid-and-functions\/"},"modified":"2023-11-05T05:48:01","modified_gmt":"2023-11-05T05:48:01","slug":"building-event-driven-serverless-applications-with-azure-event-grid-and-functions","status":"publish","type":"post","link":"http:\/\/localhost:10003\/building-event-driven-serverless-applications-with-azure-event-grid-and-functions\/","title":{"rendered":"Building event-driven serverless applications with Azure Event Grid and Functions"},"content":{"rendered":"

Introduction<\/h2>\n

In the current technology landscape, serverless computing has moved from a trendy buzzword to a powerful and effective way to develop and run applications that automatically scale to meet the demands of even the most complex, dynamic environments. Azure Event Grid and Azure Functions, both part of the Microsoft Azure platform, are two powerful technologies that can be used to build event-driven serverless applications.<\/p>\n

This tutorial will cover the basics of serverless computing, introduce the architecture of Azure Event Grid and Azure Functions, and demonstrate how you can use these technologies together to build powerful event-driven serverless applications.<\/p>\n

Understanding Serverless Computing<\/h2>\n

Serverless computing is an approach to building and running applications that eliminates the need for infrastructure management, server provisioning, and scale management. In a serverless computing environment, the cloud service provider manages the infrastructure (i.e., the servers, storage, and networking resources) for the application, leaving the developer to focus solely on writing application code.<\/p>\n

Serverless computing is often used to build event-driven, serverless applications. These applications are designed to respond to specific events, such as a user uploading a file or a database record being created. Rather than running continuously, these applications are triggered by events, run a specific piece of code or function, and then return a response to the event that triggered it.<\/p>\n

Azure Event Grid<\/h2>\n

Azure Event Grid is a fully managed event-routing service that allows you to build event-driven applications. It provides a simple yet powerful way to react to events from many different sources, including Azure services, third-party services, and custom applications.<\/p>\n

Event Grid is built around the concept of a topic, which represents a logical grouping of events. Event sources push events to topics, which are then routed to event handlers. Event handlers can be anything from simple HTTP endpoints to complex Azure Functions.<\/p>\n

Azure Functions<\/h2>\n

Azure Functions is a serverless compute service that allows you to run code in response to events. Functions can be written in C#, Java, PowerShell, JavaScript, and other languages and run on-demand without requiring you to manage any infrastructure.<\/p>\n

Functions can be triggered by many different sources, including HTTP requests, Azure Event Grid events, Cron-like schedules, and more. When a function is triggered, it runs the specific code logic associated with the trigger and then returns a response.<\/p>\n

Building an Event-Driven Serverless Application with Azure Event Grid and Functions<\/h2>\n

Now that we understand the basics of serverless computing and the architecture of Azure Event Grid and Functions, let’s build an event-driven serverless application that combines the two.<\/p>\n

For demonstration purposes, we’ll build an application that receives a notification every time a new image is uploaded to an Azure Storage account. The notification will be sent to an Azure Function which will then resize the image and store it in a specified container.<\/p>\n

Prerequisites<\/h3>\n

To follow along with this tutorial, you’ll need:<\/p>\n