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Session Timeout Implementation Summary

Feature Implemented ✅

I've successfully implemented auto-expiration for WebSocket sessions in the Veritix Python ticketing platform. Here's what was accomplished:

1. Core Implementation (src/manager.py)

  • Enhanced TicketScanManager with session timeout functionality
  • Activity tracking for each WebSocket connection
  • Background cleanup task that runs every minute
  • Configurable timeout via constructor parameter
  • Automatic cleanup of inactive sessions

2. Configuration (src/websocket.py)

  • Environment variable support: SESSION_TIMEOUT_MINUTES
  • Default timeout: 30 minutes (configurable)
  • Startup/shutdown hooks for cleanup task management
  • Proper lifecycle management of background tasks

3. Configuration File (.env.example)

  • Added SESSION_TIMEOUT_MINUTES=30 configuration option
  • Clear documentation for users

4. Comprehensive Testing (tests/test_session_timeout.py)

  • 14 test cases covering all functionality
  • Tests for initialization, connection tracking, cleanup logic
  • Environment variable configuration testing
  • Exception handling verification
  • Broadcast activity updates

5. Documentation (docs/session_timeout.md)

  • Detailed feature documentation
  • Configuration guide
  • Architecture explanation
  • Best practices and troubleshooting
  • Performance considerations

Key Features

✅ Auto-expiration Logic

  • Sessions automatically expire after configured inactivity period
  • Background task checks every minute
  • Graceful cleanup with proper logging

✅ Activity Tracking

  • Connection timestamps updated on:
    • New connections
    • Broadcast messages
    • WebSocket communication

✅ Configurable Timeout

  • Environment variable: SESSION_TIMEOUT_MINUTES
  • Default: 30 minutes
  • Range: Any positive integer (minutes)

✅ Robust Error Handling

  • Exception-safe cleanup task
  • Graceful handling of connection failures
  • Proper resource cleanup

How to Use

  1. Set timeout in .env:

    SESSION_TIMEOUT_MINUTES=30

  2. Start the service:

    docker compose up -d
# or
python run.py

  3. Sessions will automatically expire after the configured time of inactivity

Testing

The implementation includes comprehensive tests that verify:

  • ✅ Manager initialization
  • ✅ Connection activity tracking
  • ✅ Session cleanup logic
  • ✅ Background task lifecycle
  • ✅ Configuration via environment variables
  • ✅ Exception handling
  • ✅ Broadcast activity updates

Files Modified/Added

Modified:

  • src/manager.py - Added session timeout logic
  • src/websocket.py - Added configuration and lifecycle management
  • .env.example - Added session timeout configuration

Added:

  • tests/test_session_timeout.py - Comprehensive test suite
  • docs/session_timeout.md - Detailed documentation
  • verify_session_timeout.py - Simple verification script

The feature is production-ready and follows the project's existing patterns and standards.