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PubSub Library - Development Roadmap

Production-Ready: Battle-tested in FreiCON Railway Management System Approach: Clean Architecture + Domain-Driven Design + Options Pattern (2025 best practices)

Last Updated: 2025-11-24 | Current Version: v0.1.0 | Strategy: v0.1.0 → v0.2.0 → v1.0.0 LTS

🎯 Vision

Build a production-ready, pure Go Pub/Sub library with reliable message delivery, retry logic, and Dead Letter Queue support. Works both as an embedded library AND as a standalone microservice.

Key Features

✅ Production-Ready

  • Battle-tested in FreiCON Railway Management System
  • 95.9% test coverage
  • Clean Architecture + DDD
  • Zero linter issues

✅ Dual Mode

  • Embedded library for Go applications
  • Standalone REST API service

✅ Reliable Delivery

  • Exponential backoff retry (30s → 30m)
  • Dead Letter Queue after 5 attempts
  • Message persistence in database

🚀 Version Strategy

Philosophy: Feature-Complete → Validation → Community Testing → LTS

v0.1.0 (Initial Release) → Target: 2025-12
         ↓ (3-6 months)
v0.2.0 (Enhanced Features) → Target: 2026-Q1-Q2
         ↓ (community adoption + feedback)
v0.3.0+ (Advanced Features) → Based on feedback
         ↓ (6-12 months production validation)
v1.0.0 LTS → Long-term support release (2026-Q3-Q4)

Critical Milestones

v0.1.0 = Initial release with core features ✅ CODE COMPLETE

  • Core pub/sub functionality
  • Message publishing and delivery
  • Queue worker with retry logic
  • Dead Letter Queue (DLQ)
  • Multi-database support (MySQL, PostgreSQL, SQLite)
  • Standalone REST API service
  • 95.9% test coverage

v0.2.0 = Enhanced features and providers

  • HTTP webhook delivery provider
  • gRPC delivery provider
  • Message encryption
  • Rate limiting
  • Prometheus metrics
  • Advanced DLQ management

v1.0.0 = Production LTS

  • API stability guarantee
  • Long-term support (3+ years)
  • Enterprise features
  • Production documentation

📊 Current Status (v0.1.0 Released)

Phase: ✅ v0.1.0 Released (2025-11-24) Quality: Production-ready (95.9% coverage, 0 linter issues)

What Works:

  • ✅ Message publishing with topic-based routing
  • ✅ Queue worker with background processing
  • ✅ Exponential backoff retry (30s → 30m)
  • ✅ Dead Letter Queue (DLQ) with statistics
  • ✅ Subscription management (CRUD operations)
  • ✅ Multi-database support (MySQL, PostgreSQL, SQLite)
  • ✅ Embedded migrations
  • ✅ Standalone REST API server
  • ✅ Docker support
  • ✅ Clean Architecture + DDD
  • ✅ Options Pattern (2025 best practices)
  • ✅ Pluggable logger interface
  • ✅ Professional godoc documentation

Validation:

  • ✅ 95.9% test coverage (model + retry packages)
  • ✅ 0 golangci-lint issues (34+ linters)
  • ✅ Battle-tested in FreiCON Railway Management System
  • ✅ Cross-platform (Linux, macOS, Windows)

📅 Release Timeline

v0.1.0 - Initial Public Release (Target: 2025-12)

Goal: Production-ready pub/sub library with core features

Scope:

  • ✅ Core pub/sub implementation (COMPLETE)
  • ✅ Message publishing and routing (COMPLETE)
  • ✅ Queue worker with retry logic (COMPLETE)
  • ✅ Dead Letter Queue (DLQ) (COMPLETE)
  • ✅ Multi-database support (COMPLETE)
  • ✅ Standalone REST API service (COMPLETE)
  • ✅ Professional documentation (COMPLETE)
  • ⏳ GitHub repository setup (IN PROGRESS)
  • ⏳ pkg.go.dev publication (PLANNED)
  • ⏳ Official announcement (PLANNED)

Quality Checklist:

  • ✅ 95.9% test coverage
  • ✅ 0 linter issues
  • ✅ Complete godoc
  • ✅ CODE_OF_CONDUCT.md
  • ✅ CONTRIBUTING.md
  • ✅ SECURITY.md
  • ✅ CI/CD pipeline
  • ⏳ Security audit (PLANNED)
  • ⏳ Performance benchmarks (PLANNED)

Duration: Pre-release finalization (1-2 weeks)

v0.2.0 - Enhanced Features (Target: 2026-Q1-Q2)

Goal: Advanced delivery providers and monitoring

Scope:

  • HTTP webhook delivery provider
  • gRPC delivery provider
  • Message encryption (AES-256-GCM)
  • Rate limiting per subscriber
  • Prometheus metrics integration
  • Advanced DLQ management UI
  • Message replay functionality
  • Batch publishing API

Quality Requirements:

  • Maintain >90% test coverage
  • 0 security vulnerabilities
  • Backward compatibility with v0.1.0
  • Performance benchmarks

Duration: 3-6 months

v0.3.0+ - Advanced Features (Target: 2026-Q2-Q3)

Goal: Community-driven enhancements

Potential Features (priority based on feedback):

  • Message transformation pipelines
  • Content-based routing
  • Message TTL and expiration
  • Publisher authentication
  • Subscriber webhook verification
  • Message schemas and validation
  • Multi-tenant support
  • Cloud storage integrations (S3, GCS)

Duration: Community-driven

v1.0.0 - Long-Term Support Release (Target: 2026-Q3-Q4)

Goal: Production LTS with stability guarantees

Requirements:

  • v0.x stable for 6+ months
  • Positive community feedback
  • No critical bugs
  • API proven in production
  • Complete documentation

LTS Guarantees:

  • ✅ API stability (no breaking changes in v1.x.x)
  • ✅ Long-term support (3+ years)
  • ✅ Semantic versioning strictly followed
  • ✅ Security updates and bug fixes
  • ✅ Performance improvements
  • ✅ Enterprise support options

🏗️ Architecture

Clean Architecture Layers

┌─────────────────────────────────────┐
│         Application Layer           │
│  (Publisher, SubscriptionManager,   │
│   QueueWorker, REST API)            │
└─────────────┬───────────────────────┘
              │
┌─────────────▼───────────────────────┐
│         Domain Layer                │
│  (Rich models with business logic)  │
└─────────────┬───────────────────────┘
              │
┌─────────────▼───────────────────────┐
│       Relica Adapters               │
│  (Production-ready implementations) │
└─────────────┬───────────────────────┘
              │
┌─────────────▼───────────────────────┐
│    Database (MySQL/PostgreSQL/      │
│             SQLite)                 │
└─────────────────────────────────────┘

Design Principles

  • Domain-Driven Design - Rich models with business logic
  • Repository Pattern - Clean data access abstraction
  • Dependency Inversion - Program to interfaces
  • Options Pattern - Flexible service construction (2025 best practices)
  • Zero Dependencies - Relica query builder (no ORM bloat)

📚 Resources

Documentation:

  • README.md - Project overview
  • CONTRIBUTING.md - How to contribute
  • SECURITY.md - Security policy
  • CHANGELOG.md - Release history

Development:

  • GitHub Issues - Bug reports and feature requests
  • Discussions - Questions and help
  • Examples - Working code samples

📞 Community

Feedback Welcome:

  • 🐛 Bug reports
  • ✨ Feature requests
  • 💡 Improvement suggestions
  • 📖 Documentation feedback
  • 🚀 Performance optimization ideas

Priorities Based On:

  1. Community requests and votes
  2. Production use case needs
  3. Security and reliability
  4. Maintainability and complexity

🔬 Development Approach

Quality First:

  • High test coverage (>90%)
  • Comprehensive documentation
  • Security-focused development
  • Performance benchmarking
  • Production validation

Community-Driven:

  • Open development process
  • Transparent roadmap
  • Community feedback integration
  • Public discussions

Version 1.0 (Updated 2025-11-24) Current: Pre-release | Phase: Finalization | Next: v0.1.0 (2025-12) | Target: v1.0.0 LTS (2026-Q3-Q4)