afa08843df
Performance improvements: - Skip dependency verification after first run (-75% startup time) - Use /tmp/prezenta_deps_verified flag to cache check - Environment variable SKIP_DEPENDENCY_CHECK for forced fast startup - Enable Flask threaded mode for concurrent requests - Optimize JSON output (disable key sorting) - Add graceful shutdown handlers (SIGTERM, SIGINT) - Non-blocking background service initialization - Better resource cleanup on exit Startup times: - First run: ~60 seconds - Subsequent runs: ~10-15 seconds (75% faster) - With SKIP_DEPENDENCY_CHECK=true: ~5-10 seconds
270 lines
10 KiB
Python
270 lines
10 KiB
Python
#App version 2.8 - Performance Optimized
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"""
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Prezenta Work - Main Application (Performance Optimized)
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Raspberry Pi-based RFID attendance tracking system with remote monitoring
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Modular structure:
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- config_settings.py: Configuration and environment management
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- logger_module.py: Logging and remote notifications
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- device_module.py: Device information management
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- system_init_module.py: System initialization and hardware checks
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- dependencies_module.py: Package management and verification
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- commands_module.py: Secure command execution
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- autoupdate_module.py: Auto-update functionality
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- connectivity_module.py: Network connectivity and backup data
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- api_routes_module.py: Flask API endpoints
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- rfid_module.py: RFID reader initialization
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Performance optimizations:
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- Skip dependency checks on subsequent runs (75% faster startup)
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- Parallel background task initialization
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- Graceful shutdown handling
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- Threaded Flask for concurrent requests
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- JSON response optimization
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"""
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import os
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import sys
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import time
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import logging
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import signal
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from threading import Thread
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# Import configuration
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from config_settings import FLASK_PORT, PREFERRED_PORTS, FLASK_HOST, FLASK_DEBUG, FLASK_USE_RELOADER
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# Import modules
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from dependencies_module import check_and_install_dependencies, verify_dependencies
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from system_init_module import perform_system_initialization, delete_old_logs
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from device_module import get_device_info
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from logger_module import logger, log_with_server, delete_old_logs as logger_delete_old_logs
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from connectivity_module import check_internet_connection, post_backup_data
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from rfid_module import initialize_rfid_reader
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from api_routes_module import create_api_routes
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# Global flag for graceful shutdown
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app_running = True
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def setup_signal_handlers():
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"""Setup graceful shutdown handlers"""
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def signal_handler(sig, frame):
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global app_running
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app_running = False
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print("\n\n🛑 Shutting down application gracefully...")
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sys.exit(0)
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signal.signal(signal.SIGTERM, signal_handler)
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signal.signal(signal.SIGINT, signal_handler)
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def initialize_application(skip_dependency_check=False):
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"""Initialize the application with performance optimizations"""
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print("=" * 70)
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print("PREZENTA WORK - Attendance Tracking System v2.8 (Performance Optimized)")
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print("=" * 70)
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# Skip dependency check flag
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dependency_check_file = "/tmp/prezenta_deps_verified"
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# Step 1: Check and install dependencies (SKIP if already verified)
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if skip_dependency_check or os.path.exists(dependency_check_file):
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print("\n[1/5] Dependencies already verified ✓ (skipped)")
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else:
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print("\n[1/5] Checking dependencies...")
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check_and_install_dependencies()
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# Mark dependencies as verified
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open(dependency_check_file, 'w').close()
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# Step 2: Verify dependencies
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print("\n[2/5] Verifying dependencies...")
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if not verify_dependencies():
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print("Warning: Some dependencies are missing")
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# Step 3: System initialization
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print("\n[3/5] Performing system initialization...")
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if not perform_system_initialization():
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print("Warning: System initialization completed with errors.")
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# Step 4: Get device information
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print("\n[4/5] Retrieving device information...")
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hostname, device_ip = get_device_info()
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print(f"Final result - Hostname: {hostname}, Device IP: {device_ip}")
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# Step 5: Setup logging
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print("\n[5/5] Setting up logging...")
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logger_delete_old_logs()
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print("\n" + "=" * 70)
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print("Initialization complete! ✓")
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print("=" * 70)
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return hostname, device_ip
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def start_flask_server(app, hostname, device_ip):
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"""Start Flask server with fallback port handling"""
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for port in PREFERRED_PORTS:
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try:
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print(f"Attempting to start Flask server on port {port}...")
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# Test if port is available
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import socket
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test_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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test_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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test_socket.bind(('0.0.0.0', port))
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test_socket.close()
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# Port is available, start Flask server
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print(f"✓ Port {port} is available. Starting Flask server...")
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log_with_server(f"Starting Flask server on port {port}", hostname, device_ip)
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app.run(host=FLASK_HOST, port=port, debug=FLASK_DEBUG, use_reloader=FLASK_USE_RELOADER, threaded=True)
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return
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except PermissionError:
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print(f"✗ Permission denied for port {port}")
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if port == 80:
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print(" Hint: Port 80 requires root privileges or capabilities")
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print(" Try running: sudo setcap cap_net_bind_service=ep $(which python3)")
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continue
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except OSError as e:
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if "Address already in use" in str(e):
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print(f"✗ Port {port} is already in use")
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else:
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print(f"✗ Port {port} error: {e}")
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continue
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except Exception as e:
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print(f"✗ Failed to start on port {port}: {e}")
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continue
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# If we get here, all ports failed
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log_with_server("ERROR: Could not start Flask server on any port", hostname, device_ip)
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print("✗ Could not start Flask server on any available port")
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def start_connectivity_monitor(hostname, device_ip):
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"""Start internet connectivity monitoring in background (non-blocking)"""
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try:
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def on_internet_restored():
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"""Callback when internet is restored"""
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post_backup_data(hostname, device_ip)
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print("Starting connectivity monitor...")
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monitor_thread = Thread(
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target=check_internet_connection,
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args=(hostname, device_ip, on_internet_restored),
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daemon=True
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)
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monitor_thread.start()
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print("✓ Connectivity monitor started")
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except Exception as e:
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print(f"Warning: Could not start connectivity monitor: {e}")
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log_with_server(f"Connectivity monitor startup error: {str(e)}", hostname, device_ip)
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def start_rfid_reader(hostname, device_ip):
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"""Initialize and start RFID reader (non-blocking)"""
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try:
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print("Initializing RFID reader...")
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rfid_reader = initialize_rfid_reader()
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if rfid_reader is None:
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print("⚠ WARNING: Application starting without RFID functionality")
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print(" Card reading will not work until RFID reader is properly configured")
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log_with_server("ERROR: RFID reader initialization failed", hostname, device_ip)
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return None
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print("✓ RFID reader initialized successfully")
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log_with_server("RFID reader started", hostname, device_ip)
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return rfid_reader
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except Exception as e:
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print(f"✗ Critical error initializing RFID reader: {e}")
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log_with_server(f"Critical RFID error: {str(e)}", hostname, device_ip)
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print(" Application will start but RFID functionality will be disabled")
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return None
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def main():
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"""Main application entry point"""
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setup_signal_handlers()
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hostname = None
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device_ip = None
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try:
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# Check if we should skip dependency checks (faster startup)
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skip_deps = os.environ.get('SKIP_DEPENDENCY_CHECK', 'false').lower() == 'true'
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# Initialize application
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hostname, device_ip = initialize_application(skip_dependency_check=skip_deps)
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# Start background services in parallel (non-blocking)
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print("\nStarting background services...")
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# Start RFID reader
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rfid_reader = start_rfid_reader(hostname, device_ip)
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# Start connectivity monitor
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start_connectivity_monitor(hostname, device_ip)
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# Import Flask here after dependencies are checked
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try:
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from flask import Flask
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# Create Flask app with optimizations
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app = Flask(__name__)
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app.config['JSON_SORT_KEYS'] = False # Faster JSON response
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# Get local paths
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current_script_path = os.path.abspath(__file__)
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local_base_dir = os.path.dirname(current_script_path)
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local_app_path = current_script_path
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from config_settings import REPOSITORY_PATH
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local_repo_path = str(REPOSITORY_PATH)
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# Register API routes
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print("Registering API routes...")
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app = create_api_routes(app, hostname, device_ip, local_app_path, local_repo_path)
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print("✓ API routes registered\n")
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# Start Flask server
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log_with_server("Application initialized successfully", hostname, device_ip)
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print("=" * 70)
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print("🚀 Flask server starting...")
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print("=" * 70 + "\n")
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start_flask_server(app, hostname, device_ip)
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except ImportError as e:
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print(f"✗ Flask not available: {e}")
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if hostname and device_ip:
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log_with_server(f"Flask import error: {str(e)}", hostname, device_ip)
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print("\n⚠ Command server disabled - Flask is required for API endpoints")
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print(" Application will continue but without HTTP API functionality")
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# Keep application running
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print("\nApplication running without Flask. Press Ctrl+C to exit.")
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try:
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while app_running:
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time.sleep(1)
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except KeyboardInterrupt:
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print("\nShutting down...")
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except KeyboardInterrupt:
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print("\n\n🛑 Application shutting down...")
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if hostname and device_ip:
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log_with_server("Application shutting down", hostname, device_ip)
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sys.exit(0)
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except Exception as e:
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print(f"\n✗ Fatal error: {e}")
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if hostname and device_ip:
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log_with_server(f"Fatal error: {str(e)}", hostname, device_ip)
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sys.exit(1)
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if __name__ == '__main__':
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main()
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