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WebSocket Module Standardization - 15 Issues

Core Infrastructure - 5 Issues

Issue #1: Implement Core WebSocket Gateway Service

Priority: Critical
Type: Feature Implementation

Description: Build the core WebSocket gateway service that handles connections, disconnections, and message routing with support for multiple transport protocols.

Direction:

  • Create src/websocket/gateways/websocket.gateway.ts using @nestjs/websockets
  • Implement connection lifecycle management (onConnect, onDisconnect)
  • Support both WebSocket and Socket.IO protocols
  • Add namespace support for logical grouping
  • Implement request/response pattern

Definition of Done:

  • Gateway service fully functional
  • Connection/disconnection handling working
  • Message routing verified
  • Code covered with tests

Acceptance Criteria:

  • Clients can connect and disconnect
  • Messages routed correctly between clients
  • Multiple namespaces supported
  • Connection state tracked accurately
  • Memory leaks prevented

Issue #2: Implement Connection Manager and State Tracking

Priority: High
Type: Feature Implementation

Description: Create a connection manager service to track active connections, manage session state, and handle connection pooling.

Direction:

  • Create src/websocket/services/connection-manager.service.ts
  • Track active connections with connection ID and metadata
  • Implement connection pooling with configurable limits
  • Add session state persistence (Redis)
  • Implement graceful connection cleanup

Definition of Done:

  • Connection manager fully functional
  • State tracking accurate
  • Connection pooling working

Acceptance Criteria:

  • Active connections tracked accurately
  • Connection metadata stored and retrieved
  • Connection pool limits enforced
  • State persisted in Redis
  • Cleanup on disconnect working

Issue #3: Implement Message Queue and Reliability Layer

Priority: High
Type: Feature Implementation

Description: Create a message queue system ensuring reliable message delivery with retry logic and acknowledgment handling.

Direction:

  • Create src/websocket/services/message-queue.service.ts
  • Implement outbound message queue with persistence
  • Add acknowledgment (ACK) mechanism
  • Implement exponential backoff retry (3 attempts, 1s/2s/4s delays)
  • Create dead-letter queue for failed messages
  • Add message expiration (TTL)

Definition of Done:

  • Message queue operational
  • Reliability mechanisms working
  • Dead-letter queue processing

Acceptance Criteria:

  • Messages queued successfully
  • ACK mechanism working
  • Retries execute with exponential backoff
  • Dead-letter queue captures failed messages
  • Message TTL enforced

Issue #4: Implement WebSocket Authentication and Authorization

Priority: Critical
Type: Security

Description: Add JWT-based authentication and role-based authorization to WebSocket connections with token refresh capabilities.

Direction:

  • Create src/websocket/guards/websocket-auth.guard.ts
  • Validate JWT tokens on connection
  • Implement role-based access control (RBAC)
  • Add token refresh mechanism
  • Prevent unauthorized message access
  • Implement per-event authorization checks

Definition of Done:

  • Authentication working
  • Authorization enforced
  • Token refresh functional

Acceptance Criteria:

  • Unauthenticated connections rejected
  • JWT tokens validated on connect
  • Role-based access enforced
  • Token refresh working
  • Unauthorized events rejected

Issue #5: Implement Reconnection and Resilience Handling

Priority: High
Type: Feature Implementation

Description: Implement automatic reconnection logic, session recovery, and message buffering for network interruptions.

Direction:

  • Create src/websocket/services/reconnection.service.ts
  • Implement exponential backoff reconnection (initial 1s, max 30s)
  • Add session recovery with message backlog
  • Buffer outgoing messages during disconnection
  • Implement heartbeat/ping mechanism
  • Add connection stability metrics

Definition of Done:

  • Reconnection logic working
  • Message recovery functional
  • Stability metrics tracked

Acceptance Criteria:

  • Clients reconnect automatically on disconnect
  • Previous messages retrieved after reconnect
  • Message buffer cleared after reconnect
  • Heartbeat working (30s interval)
  • Reconnection metrics logged

Event Handling and Messaging - 3 Issues

Issue #6: Implement Event Emitter and Listener System

Priority: High
Type: Feature Implementation

Description: Create standardized event emission and listening system for WebSocket events with event decorators.

Direction:

  • Create src/websocket/decorators/websocket-event.decorator.ts
  • Implement event registration system
  • Add event validation middleware
  • Create event context (user, client ID, timestamp)
  • Add event logging and tracing

Definition of Done:

  • Event system fully functional
  • All events properly registered
  • Event context available in handlers

Acceptance Criteria:

  • Events can be emitted and received
  • Event handlers registered and called
  • Event validation working
  • Event context passed to handlers
  • Event traces logged

Issue #7: Implement Broadcasting and Room Management

Priority: High
Type: Feature Implementation

Description: Create room/channel system for targeted messaging with broadcasting capabilities.

Direction:

  • Create src/websocket/services/room-manager.service.ts
  • Implement room creation and destruction
  • Add user join/leave room functionality
  • Implement broadcast to room
  • Add room-level permissions
  • Implement private messaging

Definition of Done:

  • Room system operational
  • Broadcasting working
  • Permissions enforced

Acceptance Criteria:

  • Rooms created and destroyed
  • Users join/leave rooms correctly
  • Broadcast messages reach all room members
  • Room permissions enforced
  • Private messaging working

Issue #8: Implement Message Serialization and Compression

Priority: Medium
Type: Feature Implementation

Description: Add message serialization, compression, and protocol handling for efficient data transmission.

Direction:

  • Create src/websocket/services/message-serializer.service.ts
  • Implement JSON serialization
  • Add optional payload compression (gzip)
  • Implement binary frame support
  • Add message versioning
  • Create serialization middleware

Definition of Done:

  • Serialization working
  • Compression functional
  • Performance improved

Acceptance Criteria:

  • Messages serialized correctly
  • Compression reduces payload by 30%+
  • Binary frames supported
  • Message versioning working
  • Middleware in place

Monitoring and Observability - 3 Issues

Issue #9: Implement WebSocket Metrics and Monitoring

Priority: High
Type: DevOps

Description: Add comprehensive monitoring, metrics collection, and performance tracking for WebSocket connections.

Direction:

  • Create src/websocket/services/metrics.service.ts
  • Implement Prometheus metrics (connections, messages, latency)
  • Track connection duration and message throughput
  • Add error rate monitoring
  • Implement performance alerts
  • Create metrics dashboard

Definition of Done:

  • Metrics exposed on /metrics endpoint
  • Monitoring dashboard created
  • Alerts configured

Acceptance Criteria:

  • Active connections metric tracked
  • Message throughput monitored
  • Latency percentiles calculated (p50, p95, p99)
  • Error rates tracked
  • Alerts trigger on anomalies

Issue #10: Implement Structured Logging and Tracing

Priority: High
Type: DevOps

Description: Add structured logging with correlation IDs and distributed tracing for WebSocket events.

Direction:

  • Create src/websocket/services/logger.service.ts
  • Implement structured JSON logging
  • Add correlation ID to all events
  • Implement distributed tracing with OpenTelemetry
  • Add request/response logging
  • Create log aggregation integration (ELK/Datadog)

Definition of Done:

  • Logging structured and centralized
  • Tracing working end-to-end
  • Log queries working

Acceptance Criteria:

  • All logs in JSON format
  • Correlation IDs present in logs
  • Trace spans created for events
  • Request/response logged
  • Log aggregation working

Issue #11: Implement Health Checks and Status Endpoints

Priority: Medium
Type: DevOps

Description: Create WebSocket health check endpoints and connection status monitoring.

Direction:

  • Create src/websocket/services/health-check.service.ts
  • Implement /health endpoint
  • Add connection pool status checks
  • Implement message queue health
  • Add Redis connection verification
  • Create status dashboard

Definition of Done:

  • Health check endpoint working
  • Status monitoring functional
  • Alerting on unhealthy state

Acceptance Criteria:

  • Health check endpoint returns status
  • Connection pool health verified
  • Message queue health checked
  • Dependencies verified
  • Alerts on degraded service

Testing and Quality - 2 Issues

Issue #12: Implement Comprehensive Unit Tests

Priority: High
Type: Testing

Description: Create comprehensive unit tests for all WebSocket services and gateways.

Direction:

  • Create test suite src/websocket/**/*.spec.ts
  • Test connection lifecycle
  • Test event handling
  • Test room management
  • Test authentication/authorization
  • Test reconnection logic
  • Aim for >90% code coverage

Definition of Done:

  • All services tested
  • Coverage >90%
  • Tests passing in CI

Acceptance Criteria:

  • All services have unit tests
  • Code coverage >90%
  • Test execution <5 seconds
  • All edge cases covered
  • Mock dependencies properly used

Issue #13: Implement Integration and Load Tests

Priority: High
Type: Testing

Description: Create end-to-end integration tests and load tests for WebSocket performance under stress.

Direction:

  • Create test/websocket.e2e-spec.ts for integration tests
  • Create load test suite using Artillery or k6
  • Test 1000+ concurrent connections
  • Test message throughput (10k+ messages/sec)
  • Test reconnection scenarios
  • Test room operations at scale

Definition of Done:

  • Integration tests pass
  • Load tests pass
  • Performance benchmarks met

Acceptance Criteria:

  • E2E tests cover complete workflows
  • 1000+ concurrent connections supported
  • Message latency <100ms p95
  • No message loss during reconnection
  • Room operations scale to 10k+ rooms

Security and Hardening - 2 Issues

Issue #14: Implement Rate Limiting and DDoS Protection

Priority: High
Type: Security

Description: Add rate limiting, connection throttling, and DDoS protection mechanisms.

Direction:

  • Create src/websocket/guards/rate-limit.guard.ts
  • Implement per-connection rate limiting (100 msg/min)
  • Add per-user rate limiting (1000 msg/min)
  • Implement connection limits per IP
  • Add burst detection and throttling
  • Implement backpressure handling

Definition of Done:

  • Rate limiting enforced
  • DDoS protection active
  • Tests passing

Acceptance Criteria:

  • Rate limits enforced per connection
  • Rate limits enforced per user
  • IP-based connection limits working
  • Burst detected and throttled
  • Error responses on limit exceeded

Issue #15: Implement Security Hardening and Input Validation

Priority: High
Type: Security

Description: Add comprehensive input validation, payload size limits, and security hardening measures.

Direction:

  • Create src/websocket/validators/message.validator.ts
  • Implement message payload size limits (1MB)
  • Add input sanitization and validation
  • Implement XSS prevention
  • Add CORS security headers for WebSocket
  • Implement frame validation

Definition of Done:

  • Validation working
  • Security hardened
  • Tests passing

Acceptance Criteria:

  • All inputs validated before processing
  • Payload size limits enforced
  • XSS attempts blocked
  • Invalid frames rejected
  • Security headers set correctly

Summary Table

Category Issue Priority Type
Core Infrastructure #1: Core Gateway Critical Feature
Core Infrastructure #2: Connection Manager High Feature
Core Infrastructure #3: Message Queue High Feature
Core Infrastructure #4: Authentication Critical Security
Core Infrastructure #5: Reconnection High Feature
Event Handling #6: Event System High Feature
Event Handling #7: Broadcasting High Feature
Event Handling #8: Serialization Medium Feature
Monitoring #9: Metrics High DevOps
Monitoring #10: Logging High DevOps
Monitoring #11: Health Checks Medium DevOps
Testing #12: Unit Tests High Testing
Testing #13: Integration Tests High Testing
Security #14: Rate Limiting High Security
Security #15: Input Validation High Security

Total: 15 Issues

Implementation Priority Order:

  1. Phase 1 (Critical): Issues #1, #4 - Core gateway and authentication
  2. Phase 2 (High): Issues #2, #3, #5, #6, #7 - Connection management and events
  3. Phase 3 (High): Issues #9, #10, #12, #13, #14, #15 - Monitoring, testing, security
  4. Phase 4 (Medium): Issues #8, #11 - Optimization and health

Key Metrics:

  • Lines of Code Expected: ~5,000-7,000
  • Test Coverage Target: >90%
  • Performance Targets:
    • Connection setup: <100ms
    • Message latency: <100ms (p95)
    • Throughput: 10k+ messages/sec
    • Concurrent connections: 1000+
  • Deployment: Docker-ready with health checks