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

Creating a serverless workflow using durable functions

The orchestrator function manages the workflow via code. The function can asynchronously call other Azure functions (named activity functions), which are the stages in the workflow.

In this recipe, you'll learn about orchestrator functions and activity functions.

Getting ready

Before moving forward, you can read more about orchestrator and activity trigger bindings at https://docs.microsoft.com/azure/azure-functions/durable-functions-bindings.

How to do it...

Here, you'll create the orchestrator function and the activity function.

Creating the orchestrator function

Complete the following steps:

  1. Navigate to the Azure function templates and search for the Durable Functions orchestrator template, as shown in Figure 7.6:
    Durable Functions orchestrator—template
    Figure 7.6: Durable Functions orchestrator—template
  2. Once you click on the Durable Functions orchestrator tile, you'll be taken to the following tab, where you...