Resource Design
Identify Resources
E-commerce system:
- Users
- Products
- Orders
- Reviews
- Cart
Resource Relationships
User → has many → Orders
Order → has many → OrderItems
Product → has many → Reviews
User → has one → Cart
Key Points
- Understanding API Design: Resources is essential for production systems
- Always consider scalability and maintainability
- Test thoroughly before deploying to production
- Monitor performance and set up alerting
Common Patterns
- Validation: Always validate input at the boundary
- Error Handling: Use structured error responses
- Logging: Log key events for debugging
- Testing: Unit, integration, and load tests
- Documentation: Keep docs updated with code changes
API Best Practices
Design Principles
- Use nouns, not verbs
- Plural resource names
- Consistent naming conventions
- Proper HTTP status codes
Versioning
- URI versioning (/v1/resource)
- Header versioning
- Deprecation policy
Documentation
- OpenAPI/Swagger specs
- Request/Response examples
- Error code documentation
- Rate limit documentation
Key Points
- Understanding API Design: Resources is essential for production systems
- Always consider scalability and maintainability
- Test thoroughly before deploying to production
- Monitor performance and set up alerting
Common Patterns
- Validation: Always validate input at the boundary
- Error Handling: Use structured error responses
- Logging: Log key events for debugging
- Testing: Unit, integration, and load tests
- Documentation: Keep docs updated with code changes
Practice Problems
Design and implement a solution for API Design: Resources in a backend system. Consider scalability, error handling, and production readiness.
Solution
// API Design: Resources implementation
// Key aspects: validation, error handling, logging, testing
public class APIDesignResources {
// Production-ready implementation
}Identify and handle edge cases for API Design: Resources. What happens under high load, with invalid input, or during failures?
Solution
// Edge case handling:
// 1. Null/empty input -> validation
// 2. High load -> rate limiting, queuing
// 3. Failures -> retries, circuit breaker
// 4. Concurrent access -> locks, idempotencyWrite a testing strategy for API Design: Resources. Include unit tests, integration tests, and performance tests.
Solution
// Test plan:
// - Unit: 80% coverage target
// - Integration: API contracts
// - Performance: latency, throughput
// - Chaos: failure injectionQuiz
1. Resources in REST are?
2. Resource design starts with?
3. What is the primary purpose of API Design: Resources?
4. What is a common mistake when implementing API Design: Resources?
Flashcards
Question
Resources are?
Click to reveal answer
Answer
Nouns (entities)
Question
Start with?
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Answer
Entities from requirements
Question
What is API Design: Resources?
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Answer
API Design: Resources is a key concept in backend development.
Question
When to use API Design: Resources?
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Answer
Use API Design: Resources when building production systems that require reliability, scalability, and maintainability.
Question
API Design: Resources best practices
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Answer
Follow SOLID principles, write clean code, test thoroughly, document decisions, and monitor in production.
Revision Notes
Key Takeaways
- 1.Resources = nouns from requirements
- 2.Map entities to REST resources
- 3.Identify relationships between resources
- 4.Design resource model before endpoints
Interview Tips
- •Identify resources from requirements
- •Map entities to resources
Cheat Sheet
API Resources
- Resources: nouns (entities)
- Map: requirements → entities → resources
- Relationships: User→Orders, Order→Items
- Design model before endpoints