Repository and Unit of Work Pattern - Compatibility and Limitations with Microservices
Understand the limitations of the Unit of Work pattern in a microservices context and explore alternatives like the Saga Pattern.
Summary
This article is part of a series covering the Repository and Unit of Work patterns:
- General Introduction and Usefulness in Enterprise Projects
- Details of the Repository Pattern
- Details of the Unit of Work Pattern
- Compatibility and Limitations with Microservices
- Practical Example: Joint Usage in an E-commerce Platform
- Conclusion and Lessons Learned
Best Practices for Enterprise Projects
Compatibility with Microservices
While the Unit of Work pattern is highly effective for managing local transactions in a monolithic application, it has limitations in a microservices context. Since each microservice is autonomous, the Unit of Work cannot handle distributed transactions across multiple services.
In such cases, solutions like the Saga Pattern or Eventual Consistency are required. The Saga Pattern coordinates transactions spread across multiple services through a series of compensable or confirmable steps, ensuring global consistency in a distributed environment. However, within an individual microservice, the Unit of Work pattern remains relevant for structuring data access and ensuring coherent transactions.
When to Use These Patterns?
- Complex Projects: These patterns are extremely useful when data access becomes complex and involves multiple entities.
- DDD (Domain-Driven Design): They integrate well into a domain-oriented architecture.
- Testability: By isolating data access logic, these patterns facilitate writing unit tests.
When to Avoid Them?
In small projects or simple applications, using Entity Framework Core directly may suffice without adding unnecessary complexity.
Next: Practical Example: Joint Usage in an E-commerce Platform