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Message Bus
Overview
The Message Bus service will provide the central event-driven communication infrastructure for the stock-bot platform. It will enable reliable, scalable, and decoupled interaction between services through asynchronous messaging, event streaming, and publish-subscribe patterns.
Planned Features
Messaging Infrastructure
- Topic-based Messaging: Publish-subscribe communication model
- Message Queuing: Reliable message delivery with persistence
- Event Streaming: Real-time event processing with replay capabilities
- Message Routing: Dynamic routing based on content and metadata
- Quality of Service: Various delivery guarantee levels (at-least-once, exactly-once)
Message Processing
- Message Transformation: Content transformation and enrichment
- Message Filtering: Rules-based filtering of messages
- Schema Validation: Enforcement of message format standards
- Serialization Formats: Support for JSON, Protocol Buffers, Avro
- Compression: Message compression for efficiency
Operational Features
- Dead Letter Handling: Management of unprocessable messages
- Message Tracing: End-to-end tracing of message flow
- Event Sourcing: Event storage and replay capability
- Rate Limiting: Protection against message floods
- Back-pressure Handling: Flow control mechanisms
Integration Capabilities
- Service Discovery: Dynamic discovery of publishers/subscribers
- Protocol Bridging: Support for multiple messaging protocols
- External System Integration: Connectors for external message systems
- Legacy System Adapters: Integration with non-event-driven systems
- Web Integration: WebSocket and SSE support for web clients
Planned Integration Points
Service Connections
- All platform microservices as publishers and subscribers
- Trading Dashboard (for real-time updates)
- External Data Sources (for ingestion)
- Monitoring Systems (for operational events)
Planned Technical Implementation
Technology Stack
- Messaging Platform: Kafka or RabbitMQ
- Client Libraries: Native TypeScript SDK
- Monitoring: Prometheus integration for metrics
- Management: Admin interface for topic/queue management
- Storage: Optimized storage for event persistence
Architecture Pattern
- Event-driven architecture
- Publish-subscribe pattern
- Command pattern for request-response
- Circuit breaker for resilience
Development Guidelines
Message Design
- Event schema standards
- Versioning approach
- Backward compatibility requirements
- Message size considerations
Integration Patterns
- Event notification pattern
- Event-carried state transfer
- Command messaging pattern
- Request-reply pattern implementations
Operational Considerations
- Monitoring requirements
- Scaling guidelines
- Disaster recovery approach
- Message retention policies
Implementation Roadmap
- Core messaging infrastructure
- Service integration patterns
- Operational tooling and monitoring
- Advanced features (replay, transformation)
- External system connectors and adapters