Service Deep Dive

Master dependency injection, remote services, and service architecture
Time: 75-90 minutes • Level: Advanced • Prerequisites: Essentials - Service

🎯 What You’ll Learn

• Advanced dependency injection patterns
• Service factories and lazy loading internals
• Remote service communication
• Service-as-router (auto-generation)
• Layered service architecture
• Service composition patterns
• Performance considerations

📚 Topics

1. Advanced DI Patterns

Deep dive into dependency injection:

• Lazy loading internals
• Service factories
• Circular dependency handling
• Service scopes and lifetime

2. Remote Services

Service-to-service communication:

• HTTP client configuration
• Service discovery integration
• Retry and timeout strategies
• Circuit breakers

3. Auto-Router Deep Dive

Generate routes from services:

• Convention rules
• Method naming patterns
• Parameter mapping
• Response handling
• Custom conventions

4. Service Composition

Build complex services:

• Service layering
• Decorator pattern
• Proxy pattern
• Facade pattern

5. Service Architecture

Design scalable services:

• Service boundaries
• Domain-driven design
• Service communication patterns
• State management

6. Testing Services

Test strategies:

• Mock services
• Integration testing
• Contract testing
• Performance testing

7. Performance Optimization

Optimize service access:

• LazyLoad vs GetService benchmarks
• Caching strategies
• Connection pooling
• Resource management

8. Service Debugging

Debug complex scenarios:

• Service inspection
• Request tracing
• Performance profiling
• Error tracking

📂 Examples

All examples are in the examples/ folder:

01 - Service Factories

Custom service initialization patterns.

02 - Remote Services

HTTP-based service communication.

03 - Auto-Router Advanced

Complex auto-router scenarios.

04 - Service Composition

Layered and composed services.

05 - Service Architecture

DDD and clean architecture patterns.

06 - Testing

Mock and integration testing.

07 - Performance

Benchmarks and optimization.

08 - Migration Pattern

Monolith to microservices.

🚀 Quick Start

# Run any example
cd docs/02-deep-dive/02-service/examples/01-service-factories
go run main.go

# Test with provided test.http

📖 Prerequisites

Before diving in, make sure you understand:

• Service basics
• Dependency injection
• Service registration

🎯 Learning Path

1. Master DI patterns → Understand service lifecycle
2. Learn remote services → Enable microservices
3. Explore auto-router → Reduce boilerplate
4. Study composition → Build complex services
5. Design architecture → Scale your application
6. Test effectively → Ensure quality
7. Optimize → Improve performance
8. Plan migration → Monolith to microservices

💡 Key Takeaways

After completing this section:

• ✅ You’ll design scalable service architectures
• ✅ You’ll build services that work locally and remotely
• ✅ You’ll use auto-router effectively
• ✅ You’ll compose complex services
• ✅ You’ll test services thoroughly
• ✅ You’ll optimize service access
• ✅ You’ll plan microservices migration

Coming Soon - Examples and detailed content are being prepared.

Next: Middleware Deep Dive →