Book Image

Practical Microservices with Dapr and .NET

By : Davide Bedin
Book Image

Practical Microservices with Dapr and .NET

By: Davide Bedin

Overview of this book

Over the last decade, there has been a huge shift from heavily coded monolithic applications to finer, self-contained microservices. Dapr is a new, open source project by Microsoft that provides proven techniques and best practices for developing modern applications. It offers platform-agnostic features for running your applications on public cloud, on-premises, and even on edge devices. This book will help you get to grips with microservice architectures and how to manage application complexities with Dapr in no time. You'll understand how Dapr offers ease of implementation while allowing you to work with multiple languages and platforms. You'll also understand how Dapr's runtime, services, building blocks, and software development kits (SDKs) help you to simplify the creation of resilient and portable microservices. Dapr provides an event-driven runtime that supports the essential features you need to build microservices, including service invocation, state management, and publish/subscribe messaging. You'll explore all of those in addition to various other advanced features with this practical guide to learning Dapr. By the end of this book, you'll be able to write microservices easily using your choice of language or framework by implementing industry best practices to solve problems related to distributed systems.
Table of Contents (16 chapters)
1
Section 1: Introduction to Dapr
4
Section 2: Building Microservices with Dapr
10
Section 3: Deploying and Scaling Dapr Solutions

Using Twilio output bindings in Dapr

An output binding enables our microservice to actively interact with an external system or service without having to deal with software development kits (SDKs), libraries, or application programming interfaces (APIs) other than the Dapr API. In our C# sample, we will use the Dapr .NET SDK to abstract this interaction.

In the previous chapter, Chapter 5, Publish and Subscribe, we introduced the Shipping service: this Dapr application subscribes to the OnOrder_Prepared topic to be informed once all the steps in the order-preparation saga reach a positive conclusion.

We intend to increase the functionality of this microservice by informing the customer that the order shipped. To do so, we can leverage a notification service such as Twilio to send the customer a Short Message Service (SMS) message, as follows:

Figure 6.1 – Twilio output binding added to the Shipping service

In Figure 6.1, you can see the evolution...