Book Image

A Developer's Guide to Building Resilient Cloud Applications with Azure

By : Hamida Rebai Trabelsi
Book Image

A Developer's Guide to Building Resilient Cloud Applications with Azure

By: Hamida Rebai Trabelsi

Overview of this book

To deliver software at a faster rate and reduced costs, companies with stable legacy systems and growing data volumes are trying to modernize their applications and accelerate innovation, but this is no easy matter. A Developer’s Guide to Building Resilient Cloud Applications with Azure helps you overcome these application modernization challenges to build secure and reliable cloud-based applications on Azure and connect them to databases with the help of easy-to-follow examples. The book begins with a basic definition of serverless and event-driven architecture and Database-as-a-Service, before moving on to an exploration of the different services in Azure, namely Azure API Management using the gateway pattern, event-driven architecture, Event Grid, Azure Event Hubs, Azure message queues, FaaS using Azure Functions, and the database-oriented cloud. Throughout the chapters, you’ll learn about creating, importing, and managing APIs and Service Fabric in Azure, and discover how to ensure continuous integration and deployment in Azure to fully automate the software delivery process, that is, the build and release process. By the end of this book, you’ll be able to build and deploy cloud-oriented applications using APIs, serverless, Service Fabric, Azure Functions, and Event Grid technologies.
Table of Contents (18 chapters)
1
Part 1: Building Cloud-Oriented Apps Using Patterns and Technologies
5
Part 2: Connecting Your Application with Azure Databases
13
Part 3: Ensuring Continuous Integration and Continuous Container Deployment on Azure

Developing durable functions

In this section, we will describe the diverse types and patterns used for durable functions, and we will explain the use of durable orchestrations, timers, and events. Azure Durable Functions is an extension of Azure Functions that is used to write stateful functions. Durable Functions supports multiple languages, such as C#, JavaScript, Python, F#, and PowerShell.

Later in this chapter, we will describe the common application patterns that can benefit from durable functions:

  • Function chaining
  • Fan-out, fan-in
  • Asynchronous HTTP APIs
  • Monitor
  • Human interaction

Now that we have defined durable functions and introduced the different patterns used, we will describe durable functions in more detail and the different scenarios that require their use.

Introduction to durable functions

To implement more complex scenarios with serverless functions, we need a mechanism to allow us to save the state during the execution of these...