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Practical Microservices with Dapr and .NET

Practical Microservices with Dapr and .NET

By : Davide Bedin
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Practical Microservices with Dapr and .NET

Practical Microservices with Dapr and .NET

4 (8)
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)
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1
Section 1: Introduction to Dapr
4
Section 2: Building Microservices with Dapr
10
Section 3: Deploying and Scaling Dapr Solutions

Using the pub/sub pattern in Dapr

In microservice architectures, the pub/sub pattern is widely adopted to facilitate the creation of a decoupled communication channel between different parts of an application.

The sender (the publisher) of messages/events is unaware of which microservices would consume them and at which point in time they would do it.

On the receiving end (the subscriber) of this pattern, the microservice expresses an interest in the information shared as messages/events by subscribing to a specific set of information types—or topics, to use a better term. (Note that it is not forced to consume the complete stream of messages; it will be able to distill the relevant information from the rest.)

With a similar perspective, a subscriber is also not aware of the location and status of the publisher, as we can see in the following diagram:

Figure 5.1 – Pub/sub pattern

In Figure 5.1, you can see the pub/sub pattern in action...

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