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

Configuring durable functions in the Azure portal

In this recipe, you'll learn about configuring durable functions. In order to develop durable functions, you need to create the following three functions:

  • Orchestrator client: An Azure function that can manage orchestrator instances. It works as a client that will initiate the orchestrator objects.
  • Orchestrator function: The actual orchestrator function allows the development of stateful workflows via code. This function can asynchronously call other Azure functions (named activity functions) and can even save their return values in local variables.
  • Activity functions: These are the functions that will be called by the orchestrator function. Activity functions are where we develop the logic as per the requirements.
  • Let's get started.

Getting ready

Download and install Postman from https://www.getpostman.com/ if you haven't already installed it. We'll be using Postman to test the durable...