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

The durable serverless way of implementing CSV imports

The following diagram shows all the steps required to build the solution using serverless architecture:

Durable Functions – Architecture process flow
Figure 8.1: Durable Functions—architecture process flow

Here are the detailed steps pertaining to the preceding architecture diagram that will be implemented in this chapter:

  1. External clients or applications upload a CSV file to blob storage.
  2. A blob trigger gets triggered once the CSV file is uploaded successfully.
  3. The durable orchestrator is started from the blob trigger.
  4. The orchestrator invokes Read CSV - Activity Trigger to read the CSV content from blob storage.
  5. Orchestrator invokes Scale RUs - Activity Trigger to scale up the Cosmos DB collection's throughput so that it can accommodate the load.
  6. Orchestrator invokes Import Data - Activity Trigger to prepare the collection to bulk import data.
  7. Finally, Import Data - Activity Trigger loads the collection...