Tech Talk: Domain Driven Design And Microservices

Aug 17, 2018

Vaughn Vernon, an expert on domain-driven design and creator of the Vlingo platform, dives deep into the interplay between domain-driven design and microservices. He shares insightful guidelines for defining service and consistency boundaries. The discussion explores the importance of bounded contexts and the challenges of data consistency. Vaughn highlights how Vlingo supports DDD principles with its reactive architecture, while inviting developers to collaborate on open-source projects, fostering a global community for innovation.

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INSIGHT

DDD and Microservices

Domain-Driven Design (DDD) helps define microservices by aligning bounded contexts with service boundaries.
Bounded contexts, areas of specific meaning within a system, offer a starting point for microservices.

INSIGHT

Bounded Context

A bounded context is an area within a system where a specific domain model has a precise meaning.
The ubiquitous language within a bounded context ensures consistent understanding.

ANECDOTE

Product Definition

The word "product" can have different meanings across various business contexts.
In an inventory system, "product" might refer to a product's count and description, while in a product catalog, it relates to its price and availability.

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Implementing Domain-Driven Design

Vaughn Vernon

Implementing Domain-Driven Design provides a comprehensive approach to applying DDD principles in modern software architectures. The book covers topics such as Hexagonal, SOA, REST, CQRS, Event-Driven, and Fabric/Grid-Based architectures, along with practical techniques for entities, value objects, and domain events. It offers a top-down approach to understanding DDD, connecting strategic patterns with tactical programming tools.

Building Microservices

Designing Fine-Grained Systems

Sam Newman

This book provides a broad overview of all aspects related to microservices, including modeling, integrating, testing, deploying, and monitoring autonomous services. It covers the latest solutions in microservices technologies, such as user interfaces, container orchestration, and serverless architectures. The book is filled with practical advice and real-world cases, helping readers understand how to align system design with organizational goals, manage security, and handle the complexities of distributed services. It also discusses organizational structures and the people aspects necessary to support microservice architectures.

Domain-Driven Design

Tackling Complexity in the Heart of Software

Eric Evans

Domain-Driven Design (DDD) is a software design approach introduced by Eric Evans in 2003. The book emphasizes the importance of understanding the business domain and creating software models that closely reflect this domain. Key concepts include the use of a Ubiquitous Language, Domain Modeling, Entities, Value Objects, Services, Aggregates, and Repositories. The book also discusses Bounded Contexts, which help in managing complex domains by decomposing them into smaller, more manageable parts. Evans stresses the iterative process of refining the model through continuous collaboration between developers and domain experts, ensuring that the software design is driven by the domain rather than by technology or frameworks[1][3][5].