Book Image

Azure Serverless Computing Cookbook - Third Edition

By : Praveen Kumar Sreeram
Book Image

Azure Serverless Computing Cookbook - Third Edition

By: Praveen Kumar Sreeram

Overview of this book

This third edition of Azure Serverless Computing Cookbook guides you through the development of a basic back-end web API that performs simple operations, helping you understand how to persist data in Azure Storage services. You'll cover the integration of Azure Functions with other cloud services, such as notifications (SendGrid and Twilio), Cognitive Services (computer vision), and Logic Apps, to build simple workflow-based applications. With the help of this book, you'll be able to leverage Visual Studio tools to develop, build, test, and deploy Azure functions quickly. It also covers a variety of tools and methods for testing the functionality of Azure functions locally in the developer's workstation and in the cloud environment. Once you're familiar with the core features, you'll explore advanced concepts such as durable functions, starting with a "hello world" example, and learn about the scalable bulk upload use case, which uses durable function patterns, function chaining, and fan-out/fan-in. By the end of this Azure book, you'll have gained the knowledge and practical experience needed to be able to create and deploy Azure applications on serverless architectures efficiently.
Table of Contents (14 chapters)
13
Index

Breaking down large APIs into smaller subsets using proxies

In recent times, one of the buzzwords in the industry has been microservices, where we develop our web components as microservices that can be managed (scaling, deployment, and so on) individually without impacting the other related components. Although the subject of microservices is itself a huge one, in this recipe, we'll try to build a few microservices that can be managed individually as independent function apps. However, we'll expose them to the external world as a single API with different operations with the help of Azure function proxies.

Getting ready

In this recipe, we'll be implementing the following architecture:

Architecture of the Azure function app with proxies
Figure 11.32: Azure function app with proxies—architecture

As depicted in the preceding architecture diagram, we are going to create three proxies in the gateway function app, which will be consumed by the client apps. Each proxy is responsible...