Archery Apprentice Documentation

database-migration-status

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Database Migration Status

Last Updated: 2025-10-28 Current Phase: Week 11 COMPLETE - Equipment DAO Migration to KMP ✅ Next Phase: Week 12 (BowSetup DAO refinement + remaining DAOs)

Executive Summary

Overall Progress: Week 11 Complete - Major Milestone Achieved! 🎉

Migration Timeline:

  • ✅ Week 8: Service migrations (Pattern 3)
  • ✅ Week 9: kotlinx.serialization migration (Agent 2 lead)
  • ✅ Week 10: Entity migrations (17 entities → shared:domain/database)
  • ✅ Week 11: Equipment DAO migration to KMP (11 DAOs + 13 entities)
  • 📋 Week 12: Remaining DAOs + refinement

Week 11 Achievements:

  • ✅ 11 Equipment DAOs migrated to shared:database (Room KMP)
  • ✅ 13 Entities in KMP database (Riser, Stabilizer, Plunger, Rest, Limbs, Sight, SightMark, BowString, Weight, Arrow, Accessory, BowSetup, BowSetupEquipment)
  • ✅ ArcheryKmpDatabase v1 operational (Android)
  • ✅ DatabaseBuilder expect/actual pattern implemented
  • ✅ KmpConverters (simple string-based converters, 66 lines)
  • ✅ Build successful with Room KMP 2.8.1

Infrastructure Status:

  • 🟢 shared:database module fully operational
  • 🟢 11 DAOs working in KMP (equipment focus)
  • 🟡 iOS support stubbed (implementation Week 15+)
  • 🟢 Android fully migrated and tested

Week 11 Detailed Status

Equipment DAO Migration (11 DAOs) ✅

Location: shared/database/src/commonMain/kotlin/com/archeryapprentice/database/dao/

Individual Equipment DAOs (8 DAOs)

  1. ✅ RiserDao - Riser equipment CRUD
  2. ✅ StabilizerDao - Stabilizer equipment CRUD
  3. ✅ PlungerDao - Plunger equipment CRUD
  4. ✅ RestDao - Rest equipment CRUD
  5. ✅ LimbsDao - Limbs equipment CRUD
  6. ✅ SightDao - Sight equipment CRUD
  7. ✅ BowStringDao - BowString equipment CRUD
  8. ✅ WeightDao - Weight equipment CRUD

Complex Equipment DAOs (2 DAOs)

  1. ✅ ArrowDao - Arrow equipment with embedded types
  2. ✅ AccessoryDao - Accessory equipment CRUD

Bow Setup DAO (1 DAO)

  1. ✅ BowSetupDao - Bow setup configuration management

Migration Pattern Used: Pattern 4 (DAO Migration)

  • Move DAO to shared:database commonMain
  • Update package declarations
  • Update entity imports
  • Test compilation
  • Commit

Effort: ~6 hours total (Agent 2 lead)

Entity Migration (13 Entities) ✅

Location: shared/database/src/commonMain/kotlin/com/archeryapprentice/database/entities/

Equipment Entities (11 entities)

  1. ✅ Riser - Bow riser
  2. ✅ Stabilizer - Stabilizer equipment
  3. ✅ Plunger - Plunger equipment
  4. ✅ Rest - Arrow rest
  5. ✅ Limbs - Bow limbs
  6. ✅ Sight - Sight equipment
  7. ✅ SightMark - Individual sight marks (embedded in Sight)
  8. ✅ BowString - Bow string
  9. ✅ Weight - Stabilizer weights
  10. ✅ Arrow - Arrow equipment (complex with ArrowNock, ArrowPoint embedded)
  11. ✅ Accessory - Miscellaneous accessories

Bow Setup Entities (2 entities)

  1. ✅ BowSetup - Bow configuration
  2. ✅ BowSetupEquipment - Equipment assignments to bow setup

All entities:

  • ✅ Annotated with @Serializable (kotlinx.serialization)
  • ✅ Room annotations preserved (@Entity, @PrimaryKey, @Embedded)
  • ✅ KMP-compatible (no Android dependencies)

Infrastructure Components ✅

1. ArcheryKmpDatabase

File: shared/database/src/commonMain/kotlin/com/archeryapprentice/database/ArcheryKmpDatabase.kt

@Database(
    entities = [
        Riser::class, Stabilizer::class, Plunger::class, Rest::class,
        Limbs::class, Sight::class, SightMark::class, BowString::class,
        Weight::class, Arrow::class, Accessory::class,
        BowSetup::class, BowSetupEquipment::class
    ],
    version = 1,
    exportSchema = false
)
@ConstructedBy(ArcheryKmpDatabaseConstructor::class)
@TypeConverters(KmpConverters::class)
abstract class ArcheryKmpDatabase : RoomDatabase() {
    // 11 DAO accessors
    abstract fun riserDao(): RiserDao
    abstract fun stabilizerDao(): StabilizerDao
    // ... (all 11 DAOs)
}

Key Features:

  • Version 1 (new independent KMP database)
  • @ConstructedBy required for Room KMP non-Android platforms
  • TypeConverters enabled
  • 11 DAO accessors functional

2. DatabaseBuilder (expect/actual)

Pattern: interface + expect fun (not expect object)

Common:

interface DatabaseBuilder {
    fun build(): ArcheryKmpDatabase
}
 
expect fun getDatabaseBuilder(): DatabaseBuilder

Android:

actual fun getDatabaseBuilder(): DatabaseBuilder = AndroidDatabaseBuilder
 
object AndroidDatabaseBuilder : DatabaseBuilder {
    fun initialize(context: Context) { ... }
    override fun build(): ArcheryKmpDatabase { ... }
}

iOS: Stub (NotImplementedError until Week 15+)

3. KmpConverters

File: shared/database/src/commonMain/kotlin/com/archeryapprentice/database/converters/KmpConverters.kt

Simple string-based converters (66 lines, 3 types):

  • EquipmentType enum ↔ String
  • List<Int> ↔ comma-separated String
  • List<String> ↔ comma-separated String

Why simple? Equipment entities use primitives + @Embedded types, so no heavy JSON serialization needed.

Migration History (Week 2-11)

Week 2: Shared Domain Module ✅

  • Created shared:domain module
  • Migrated 5 core entities: Archer, ArcherEquipmentSnapshot, Equipment, Tournament, TournamentParticipant
  • Established KMP foundation

Week 4: Firebase Analysis ✅

  • Analyzed Firebase authentication patterns
  • Documented sync architecture
  • PR #145 merged

Week 5: Serialization & Database Planning ✅

  • Created serialization migration plan (890 lines)
  • Planned database migration strategy
  • PR #146 merged

Week 6-7: Entity Migration Planning ✅

  • DATABASE_MIGRATION_PLAN.md Section 7 (+789 lines)
  • Inventoried 22 entities
  • Pattern 3 (Context Abstraction) validated
  • PR #150, #152 merged

Week 8: Service Migrations ✅

  • Pattern 3 implementation complete
  • 4 platform abstractions: PreferenceStorage, ResourceProvider, FileSystemProvider, LoggingProvider
  • Services migrated to use abstractions
  • God class reduction: 6,798 → 4,891 lines (28%)

Week 9: kotlinx.serialization Migration ✅

  • Agent 2 lead (Days 1-3)
  • All entities annotated with @Serializable
  • Replaced Gson with kotlinx.serialization
  • ArrowEquipmentSnapshot Date→Long conversion

Week 10: Entity Migrations ✅

  • 17 entities migrated to shared:domain/database
  • Simple entities (7): ~2 hours
  • Medium entities (6): ~3 hours
  • Complex entities (4): ~1 hour
  • Comprehensive testing passed

Week 11: Equipment DAO Migration ✅

  • Days 1-2: Infrastructure (Agent 1 - ArcheryKmpDatabase, DatabaseBuilder, KmpConverters)
  • Days 3-7: DAO migration (Agent 2 - 11 DAOs)
  • Build fixes: Duplicate files cleanup, kspCommonMainMetadata disabled
  • Result: 11 DAOs + 13 entities in KMP database

Remaining Work (Week 12+)

Week 12: Additional DAOs

Target: 4-8 additional DAOs (medium complexity)

  • TournamentIdMappingDao
  • OfflineScoreQueueDao
  • EquipmentStatsDao
  • Statistics/cache DAOs

Effort: ~4-6 hours

Week 13-14: High-Risk DAOs (Deferred)

Complex tournament/scoring DAOs:

  • TournamentDao (high complexity, 15+ methods)
  • ScoringSessionDao (active development area)
  • HybridRoundDao (complex queries)

Strategy: Defer until tournament refactoring complete

Week 15+: iOS Implementation

  • Implement iOS DatabaseBuilder
  • iOS database location (NSHomeDirectory)
  • iOS testing on simulator
  • Cross-platform validation

Architecture Improvements

God Class Reduction Progress

ComponentBeforeAfter Week 11Reduction
LiveScoringViewModel2,808 lines1,497 lines47% ✅
RoundViewModel2,177 lines1,581 lines27% 🟡
HybridTournamentRepositoryN/A1,813 linesNew 🟡
Total God Class Lines6,798 lines4,891 lines28% ✅

Services Extracted: 19 services (~4,400 lines)

Platform Abstractions (Pattern 3)

Complete (Week 8):

  1. ✅ PreferenceStorage (SharedPreferences abstraction)
  2. ✅ ResourceProvider (Android Resources abstraction)
  3. ✅ FileSystemProvider (File I/O abstraction)
  4. ✅ LoggingProvider (android.util.Log abstraction)

Location: shared:common module

Module Structure Evolution

Before KMP (Pre-Week 8):

  • app/ - Monolithic Android app (all code)

After KMP (Week 11):

archery-agent-platform/
├── app/                          # Android app (Compose UI)
├── shared/
│   ├── common/                   # Platform abstractions (Pattern 3)
│   ├── domain/                   # Domain models, core entities
│   ├── database/                 # Room KMP database (Week 11) ✅
│   │   ├── commonMain/
│   │   │   ├── dao/              # 11 DAOs migrated
│   │   │   ├── entities/         # 13 entities
│   │   │   └── converters/       # KmpConverters
│   │   ├── androidMain/          # AndroidDatabaseBuilder
│   │   └── iosMain/              # iOS stub
│   ├── data/                     # Repositories, data sources
│   ├── presentation/             # Shared presentation logic
│   └── di/                       # Dependency injection

Testing Strategy

Week 11 Testing

DAO Tests:

  • ✅ All 11 DAO tests passing
  • ✅ CRUD operations verified
  • ✅ Complex queries tested

Repository Tests:

  • ✅ Equipment repository tests updated
  • ✅ Hybrid repository tests passing

Build Verification:

./gradlew :shared:database:build
# Result: BUILD SUCCESSFUL

Comprehensive Testing (Week 10-11)

  • ✅ Full test suite: 2051+ tests passing
  • ✅ E2E tests: TournamentLifecycleE2ETest
  • ✅ Database performance tests
  • ✅ Migration tests

Known Issues & Resolutions

Issue 1: kspCommonMainMetadata ✅ RESOLVED

Problem: Room KMP 2.8.1 generates duplicate implementations

Resolution: Disabled kspCommonMainMetadata in build.gradle.kts

  • Android KSP works correctly
  • iOS KSP deferred to Week 15+

Issue 2: @ConstructedBy Required ✅ DOCUMENTED

Status: REQUIRED for Room KMP non-Android platforms

Room auto-generates expect object ArcheryKmpDatabaseConstructor - annotation must be present.

Issue 3: Duplicate Infrastructure Files ✅ RESOLVED

Problem: Old infrastructure (com/archeryapprentice/shared/database/) conflicted with new structure

Resolution: Removed old files, kept new structure (com/archeryapprentice/database/)

Risk Assessment

Low Risk ✅

  • Equipment DAOs: Simple CRUD, well-tested
  • Pattern 4 migration: Proven workflow
  • KMP infrastructure: Stable and operational

Medium Risk ⚠️

  • iOS database implementation: Not yet started (Week 15+)

    • Mitigation: Stub in place, clear implementation path

  • Remaining DAOs: Medium-high complexity

    • Mitigation: Incremental approach, thorough testing

Controlled Risk 🔧

  • kspCommonMainMetadata disabled: Temporary workaround
    • Mitigation: Monitor Room KMP updates, re-enable when fixed

Documentation Reference

Main Repository Files

  • docs/kmp-migration/DATABASE_MIGRATION_PLAN.md (2,109+ lines)
  • docs/kmp-migration/WEEK_11_INFRASTRUCTURE_HANDOFF.md (1,968 lines)
  • docs/kmp-migration/PATTERN_4_DAO_MIGRATION_WORKFLOW.md
  • docs/AGENT_CONTEXTS/AGENT_1_AAP.md (Platform architecture)
  • docs/AGENT_CONTEXTS/AGENT_2_AAM.md (Modules & data layer)

Obsidian Vault Files

  • content/Agent-Work/Agent-1-AAP-Week-11-Infrastructure.md (Week 11 vault entry)
  • Architecture/Database-Migration-Status.md (this file)
  • Architecture/expect-actual-Pattern.md (DatabaseBuilder case study)
  • Architecture/Pre-KMP-Architecture-State.md (Week 10 snapshot)
  • PR #187: Week 11 Equipment DAO Migration (Agent 2)
  • PR #188: kotlinx-datetime dependency fix (Agent 1)
  • PR #189: Duplicate files + kspCommonMainMetadata fix (Agent 1)

Next Actions

Immediate (Week 12)

  • 📋 Migrate 4-8 additional DAOs (medium complexity)
  • 📋 BowSetup DAO refinement (if needed)
  • 📋 Repository updates for new DAOs

Week 13-14

  • 📋 High-risk DAO evaluation
  • 📋 Tournament refactoring planning
  • 📋 Statistics DAO migration

Week 15+

  • 📋 iOS DatabaseBuilder implementation
  • 📋 iOS testing and validation
  • 📋 Cross-platform E2E tests

Migration Lessons Learned

What Worked Well ✅

  1. Incremental approach: Week-by-week migration reduced risk
  2. Pattern 4 workflow: Clear, repeatable DAO migration process
  3. Infrastructure first: DatabaseBuilder/KmpConverters built before DAOs
  4. Agent specialization: Agent 1 (architecture) + Agent 2 (data layer) effective
  5. Thorough testing: Caught issues early

Challenges Overcome 💪

  1. Room KMP limitations: kspCommonMainMetadata disabled, Android-only for now
  2. @ConstructedBy confusion: Documented as REQUIRED pattern
  3. Duplicate files: Package structure cleanup needed
  4. Build configuration: KSP task dependencies resolved

Recommendations for Week 12+ 📝

  1. Continue Pattern 4 for remaining DAOs
  2. Test each DAO migration individually
  3. Monitor Room KMP updates for kspCommonMainMetadata fix
  4. Plan iOS implementation early (Week 15)
  5. Consider DAO complexity before migration (defer high-risk)

Last Updated: 2025-10-28 Status: Week 11 COMPLETE ✅ | Week 12 READY 📋 Migration Progress: 11 DAOs + 13 Entities in KMP Database

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