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- Add comprehensive 8-phase implementation plan (docs/plan.md) - Add 28 Architecture Decision Records (docs/adr/) covering all phases - Add task tracking system with 283+ task files (docs/stories/) - Add task generator script for automated task file creation - Add reference playbooks and requirements documentation This commit establishes the complete planning foundation for the Go Platform implementation, documenting all architectural decisions and providing detailed task breakdown for Phases 0-8.
50 lines
1.6 KiB
Markdown
50 lines
1.6 KiB
Markdown
# ADR-0003: Dependency Injection Framework
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## Status
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Accepted
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## Context
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The platform requires dependency injection to:
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- Manage service lifecycle
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- Wire dependencies between components
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- Support module system initialization
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- Handle graceful shutdown
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- Provide testability through dependency substitution
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Options considered:
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1. **uber-go/fx** - Runtime dependency injection with lifecycle management
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2. **uber-go/dig** - Compile-time dependency injection
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3. **Manual constructor injection** - No framework, explicit wiring
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## Decision
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Use **uber-go/fx** (v1.23.0+) as the dependency injection framework.
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**Rationale:**
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- Provides lifecycle management (OnStart/OnStop hooks) crucial for services
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- Supports module-based architecture through fx.Option composition
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- Runtime dependency resolution with compile-time type safety
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- Excellent for modular monolith architecture
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- Well-documented and actively maintained
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- Used by major Go projects (Uber, etc.)
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## Consequences
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### Positive
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- Clean lifecycle management for services
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- Easy module composition via fx.Option
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- Graceful shutdown handling built-in
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- Test-friendly with fx.Options for test overrides
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### Negative
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- Runtime reflection overhead (minimal)
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- Learning curve for developers unfamiliar with fx
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- Slightly more complex error messages on dependency resolution failures
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### Implementation Notes
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- Install: `go get go.uber.org/fx@v1.23.0`
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- Create `internal/di/container.go` with fx.New()
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- Use fx.Provide() for service registration
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- Use fx.Invoke() for initialization tasks
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- Leverage fx.Lifecycle for service startup/shutdown
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