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https://github.com/arakakimath/rocketseat-nodejs-class04-clean-ddd
4th in-class project from the rocketseat nodejs course. In this one, it was aborded the DDD approach for software developing. It was also implemented techniques like clean architecture, either for functional error handling, factory pattern, SOLID, etc.
https://github.com/arakakimath/rocketseat-nodejs-class04-clean-ddd
ddd-architecture either factory-pattern repository-pattern solid-principles unit-tests
Last synced: 11 days ago
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4th in-class project from the rocketseat nodejs course. In this one, it was aborded the DDD approach for software developing. It was also implemented techniques like clean architecture, either for functional error handling, factory pattern, SOLID, etc.
- Host: GitHub
- URL: https://github.com/arakakimath/rocketseat-nodejs-class04-clean-ddd
- Owner: arakakimath
- Created: 2024-11-29T19:38:31.000Z (2 months ago)
- Default Branch: main
- Last Pushed: 2025-01-03T00:01:16.000Z (about 1 month ago)
- Last Synced: 2025-01-03T00:25:10.337Z (about 1 month ago)
- Topics: ddd-architecture, either, factory-pattern, repository-pattern, solid-principles, unit-tests
- Language: TypeScript
- Homepage:
- Size: 244 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# DDD (Domain-driven Design)
Domain-driven Design (DDD) is a software development approach that emphasizes collaboration between technical experts and domain experts to build complex systems. It focuses on aligning the design and implementation of the system with the core business domain.
---
## Table of Contents
1. [Key Principles of DDD](#key-principles-of-ddd)
2. [Core Concepts](#core-concepts)
3. [Benefits of DDD](#benefits-of-ddd)
4. [Implementation Steps](#implementation-steps)
5. [Common Challenges](#common-challenges)
6. [Additional Resources](#additional-resources)
---
## Key Principles of DDD
1. **Focus on the Core Domain**
Identify the most critical aspects of the business and prioritize efforts to solve domain-specific problems.
2. **Collaborate with Domain Experts**
Work closely with experts to ensure the software reflects the real-world needs and processes.
3. **Use a Ubiquitous Language**
Establish a common language between developers and domain experts that avoids ambiguity.
4. **Model-Driven Design**
Create models that represent the core domain concepts and drive the software's design and architecture.
---
## Core Concepts
1. **Entities**
Objects that have a unique identity throughout their lifecycle (e.g., a Customer, Order).
2. **Value Objects**
Immutable objects that represent descriptive aspects of the domain without an identity (e.g., Money, Address).
3. **Aggregates**
A cluster of domain objects treated as a single unit, defined by a root entity (Aggregate Root).
4. **Repositories**
Patterns for retrieving and persisting domain objects, maintaining a clean interface to the domain.
5. **Domain Events**
Represent significant events that occur in the domain, promoting decoupling and enabling event-driven architectures.
6. **Bounded Contexts**
Define clear boundaries within the domain where a specific model applies, avoiding ambiguity.
7. **Application Layer**
Orchestrates application tasks, coordinates between domain objects, and communicates with external systems.
---
## Benefits of DDD
- Better alignment between business and technical teams.
- Improved maintainability of the codebase.
- Easier to adapt to business changes.
- Clear separation of concerns in architecture.
- Encourages a deeper understanding of the domain.
---
## Implementation Steps
1. **Understand the Domain**
Collaborate with domain experts to gain deep insights into the business processes.
2. **Define the Ubiquitous Language**
Create a shared vocabulary to bridge the gap between technical and non-technical stakeholders.
3. **Identify Bounded Contexts**
Break down the system into manageable contexts with clear boundaries.
4. **Design Aggregates and Entities**
Model the key domain concepts with a focus on clarity and simplicity.
5. **Implement Repositories**
Abstract data persistence to ensure domain objects remain pure.
6. **Use Domain Events**
Capture and respond to changes in the domain.
7. **Continuously Evolve the Model**
Refactor and refine as the understanding of the domain grows.
---
## Common Challenges
- Difficulty in defining clear boundaries between contexts.
- High initial learning curve for the team.
- Risk of over-complicating the model.
- Requires strong collaboration with domain experts, which may not always be feasible.
---
## Additional Resources
- **Books**
- *Domain-Driven Design: Tackling Complexity in the Heart of Software* by Eric Evans
- *Implementing Domain-Driven Design* by Vaughn Vernon
- **Articles and Blogs**
- [DDD Fundamentals](https://martinfowler.com/tags/domain%20driven%20design.html)
- [Event-Driven Architecture with DDD](https://verraes.net/category/ddd/)
- **Tools and Frameworks**
- [DDD Starter Projects](https://github.com/search?q=domain-driven-design)
---
By following the principles and practices of DDD, you can build systems that are more resilient, adaptable, and aligned with the needs of your business.
# Clean Architecture
