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

Stateful services in an e-commerce ordering system

Moving forward with the Order-Reservation scenario introduced in the previous chapters, at this stage, we will focus on persisting the state in each Dapr application.

The following diagram anticipates the change in state management that we are going to apply to our microservices:

Figure 4.2 – Multiple state stores in Dapr

As you can see in Figure 4.2, the Dapr reservation-service service is going to use Redis as the state store, while order-service is going to leverage the Cosmos DB state store.

The following are the project structures used to support the order-service and reservation-service Dapr applications:

  • sample.microservice.dto.order
  • sample.microservice.order
  • sample.microservice.dto.reservation
  • sample.microservice.reservation

I decided to have data transfer object (DTO) libraries that a service client can use to interact with the service itself, separate from the...