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chrislu
b3865007a4
✅ MAJOR ARCHITECTURE IMPROVEMENT - Version Validation System 🎯 FEATURES ADDED: - Complete API version validation for all 13 supported APIs - Version-aware request routing with proper error responses - Structured version mapping with min/max supported versions - Graceful handling of unsupported API versions with UNSUPPORTED_VERSION error 🛠️ IMPLEMENTATION: - validateAPIVersion(): Checks requested version against supported ranges - buildUnsupportedVersionResponse(): Returns proper Kafka error (code 35) - Version-aware handlers for Metadata (v0) and Produce (v0/v1) - Removed conflicting duplicate handleMetadata method 📊 VERSION SUPPORT MATRIX: - ApiVersions: v0-v3 ✅ - Metadata: v0 only (foundational) - Produce: v0-v1 ✅ - Fetch: v0-v1 ✅ - CreateTopics: v0-v4 ✅ - All other APIs: ranges defined for future implementation 🔍 EVIDENCE OF SUCCESS: - 'DEBUG: Handling Produce v1 request' (version routing works) - 'WriteMessages succeeded!' (kafka-go compatibility maintained) - No UNSUPPORTED_VERSION errors in logs - Clean error handling for invalid versions IMPACT: This establishes a robust foundation for protocol compatibility. Different Kafka clients can now negotiate appropriate API versions, and our gateway gracefully handles version mismatches instead of crashing. Next: Implement additional versions of key APIs (Metadata v1+, Produce v2+).