Introduction to Domain Driven Design

Course Overview

Domain Driven Design Concepts

• Domain Driven Design - What is it?
• Domain Driven Design - What it's Not
• Complex Problem Space
• Design Effort
• Division of Labor
• Tactical Design
• Strategic Design
• Separate Languages
• Ubiquitous Language 1/2
• Ubiquitous Language 2/2
• Capturing the Ubiquitous Language 1/3
• Capturing the Ubiquitous Language 2/3
• Capturing the Ubiquitous Language 3/3
• Domain
• Domain Examples
• Types of Domains
• Sub-Domains
• Context
• Model
• Domain Model Example - Bookstore
• Bookstore Domain Model
• Domain Model Example - Custom Cabinet Business

Strategic Domain Driven Design

• Strategic Design
• The Domain Model
• Creating the Model
• Separate Concerns
• Domains vs. Contexts
• Bounded Contexts
• Bounded Contexts Stand Alone
• Analyzing Overlap in Bounded Contexts
• Resolving Overlaps with Contexts Mapping
• Mapping Types
• Partnership Mapping
• Shared Kernel
• Cross Cutting Concerns
• Customer-Supplier
• Conformist
• Anti corruption-layer
• Open Host Service
• Separate Ways
• Big Ball of Mud (BBOM)
• Integration via Database

Domain Driven Design Building Blocks

• Building Blocks
• Entity Objects
• Value Object
• Value Object - Examples
• Aggregate 1/2
• Aggregate 2/2
• An Example Aggregate 1/2
• An Example Aggregate 2/2
• Module
• A Module Example
• Levels of Granularity
• Domain Event 1/2
• Domain Event 2/2
• Domain Event Advantages
• Services
• Service Examples
• Repository
• Generic Repository Interface
• Domain Repository Interface
• Factory
• Factory Example

Application Architecture Under Domain Driven Design

• Overall Architecture
• Interface/Presentation Layer
• Application Layer
• Domain Layer
• Domain Layer - In Practice
• Infrastructure (Services) Layer
• Technologies to use with Domain Driven Design
• Dependency Injection (DI)
• Aspect Oriented Programming (AOP)
• Aspect Oriented Programming (AOP)
• Java Persistence API (JPA)

Microservices

• What is a "Microservice"?
• One Helpful Analogy
• SOA - Microservices Relationship
• ESB - Microservices Relationship
• Traditional Monolithic Designs and Their Role
• Disadvantages of Monoliths
• Moving from a Legacy Monolith
• When Moving from a Legacy Monolith
• The Driving Forces Behind Microservices
• How Can Microservices Help You?
• The Microservices Architecture
• Utility Microservices at AWS
• Microservices Inter-connectivity
• The Data Exchange Interoperability Consideration
• Managing Microservices
• Implementing Microservices
• Embedding Databases in Java
• Microservice-Oriented Application Frameworks and Platforms

Hexagonal Architecture and Microservices

• A Different View of Application Architecture
• Traditional Layers for Traditional User Interface
• Layers with DDD
• Modern Interaction Methods
• Modern Data Storage
• Hexagonal Architecture – Ports and Adapters
• DDD in Hexagonal Architecture
• The Adapter Pattern
• The Adapter Pattern Structure
• Adapter Pattern Behavior
• Entities, Values, and Aggregates
• Repositories – Overview
• Collection Oriented Repositories
• Persistence Oriented Repositories
• Domain Services
• Domain Events
• Discovering Events
• Modeling Events
• Events and Bounded Contexts
• Publishing Domain Events
• Storing Domain Events
• Forwarding Domain Events
• Integration Between Bounded Contexts
• Mapping to Microservices
• Communication Styles for Microservices
• User Interfaces – Crossing the System Boundary
• UI Communication Strategies
• Integration Between Bounded Contexts Revisited – Options
• Integration Via RESTful Services
• Integration Via Binary Formats
• Integration Via Messaging

Lab Exercises

• Lab 1. Domain Driven Design Concepts
• Lab 2. Strategic Domain Driven Design
• Lab 3. Domain Driven Design Project