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

Chapter 4: Introducing State Management

State management for services and actors is a centerpiece of Dapr. This chapter will illustrate how a Dapr solution can manage services' states with different store types.

These are the main topics that we will explore:

  • Managing state in Dapr
  • Stateful services in an e-commerce ordering system
  • Azure Cosmos DB as a state store

Most, if not all, of our services and actors in the Dapr applications we are building have data persisted as a state.

The state could be the status of a request, kept aside to be able to return additional information of a complex interaction at a later stage, or it could be the central information managed by the service, such as the quantity of the available product.

State management is equally important for a new, cloud-native solution built with Dapr and for an existing solution to which we are adding Dapr services.

An overview of state management concepts is our starting point...