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Device Status Tracker Service
Manages and tracks the status of all connected physical AI devices
"""
import asyncio
from typing import Dict, List, Optional, Any
from datetime import datetime
from enum import Enum
import json
import uuid
class DeviceStatus(Enum):
"""Enumeration of possible device statuses"""
ONLINE = "online"
OFFLINE = "offline"
ERROR = "error"
MAINTENANCE = "maintenance"
REGISTERED = "registered"
CONNECTING = "connecting"
DISCONNECTING = "disconnecting"
class DeviceHealthStatus(Enum):
"""Enumeration of device health levels"""
EXCELLENT = "excellent"
GOOD = "good"
FAIR = "fair"
POOR = "poor"
CRITICAL = "critical"
class DeviceStatusRecord:
"""
Class representing a device's status record
"""
def __init__(self, device_id: str, initial_status: DeviceStatus = DeviceStatus.OFFLINE):
self.device_id = device_id
self.status = initial_status
self.health_status = DeviceHealthStatus.GOOD
self.last_seen = None
self.first_seen = datetime.utcnow().isoformat()
self.connection_start_time = None
self.connection_end_time = None
self.error_count = 0
self.success_count = 0
self.last_error = None
self.metrics = {
'response_time_avg': 0.0,
'availability': 0.0,
'error_rate': 0.0
}
self.properties = {}
self.status_history = []
def update_status(self, new_status: DeviceStatus, reason: str = None):
"""
Update the device status and record the change
"""
old_status = self.status
self.status = new_status
self.last_seen = datetime.utcnow().isoformat()
# Record status change in history
status_change = {
'timestamp': self.last_seen,
'old_status': old_status.value,
'new_status': new_status.value,
'reason': reason
}
self.status_history.append(status_change)
# Keep only the last 100 status changes to prevent memory issues
if len(self.status_history) > 100:
self.status_history = self.status_history[-100:]
def update_health_status(self, health_status: DeviceHealthStatus):
"""
Update the health status of the device
"""
self.health_status = health_status
def record_success(self, response_time_ms: float = None):
"""
Record a successful interaction with the device
"""
self.success_count += 1
if response_time_ms is not None:
# Update average response time (simple calculation)
total_time = self.metrics['response_time_avg'] * (self.success_count - 1) + response_time_ms
self.metrics['response_time_avg'] = total_time / self.success_count
def record_error(self, error_details: str = None):
"""
Record an error when interacting with the device
"""
self.error_count += 1
self.last_error = {
'timestamp': datetime.utcnow().isoformat(),
'details': error_details
}
# Update error rate
total_interactions = self.error_count + self.success_count
if total_interactions > 0:
self.metrics['error_rate'] = (self.error_count / total_interactions) * 100
def update_availability(self):
"""
Update the availability metric based on connection duration
"""
if self.connection_start_time:
duration_seconds = (datetime.utcnow() - datetime.fromisoformat(self.connection_start_time)).total_seconds()
# Availability is calculated as a percentage of uptime
# This is a simplified calculation - in reality, this would be more complex
self.metrics['availability'] = min(100.0, self.success_count / max(1, self.error_count + self.success_count) * 100)
def get_current_status_info(self) -> Dict[str, Any]:
"""
Get the current status information for the device
"""
return {
'device_id': self.device_id,
'status': self.status.value,
'health_status': self.health_status.value,
'last_seen': self.last_seen,
'first_seen': self.first_seen,
'error_count': self.error_count,
'success_count': self.success_count,
'last_error': self.last_error,
'metrics': self.metrics,
'properties': self.properties,
'status_history_length': len(self.status_history)
}
class DeviceStatusTracker:
"""
Service class to track and manage the status of all devices
"""
def __init__(self):
self.devices: Dict[str, DeviceStatusRecord] = {}
self.status_callbacks: Dict[str, List[callable]] = {}
self.health_thresholds = {
DeviceHealthStatus.EXCELLENT: 95,
DeviceHealthStatus.GOOD: 85,
DeviceHealthStatus.FAIR: 70,
DeviceHealthStatus.POOR: 50,
DeviceHealthStatus.CRITICAL: 0
}
async def register_device(self, device_id: str, initial_properties: Dict[str, Any] = None) -> bool:
"""
Register a new device in the status tracking system
"""
if device_id in self.devices:
print(f"Device {device_id} already registered in status tracker")
return False
# Create a new status record for the device
self.devices[device_id] = DeviceStatusRecord(device_id, DeviceStatus.REGISTERED)
# Set initial properties if provided
if initial_properties:
self.devices[device_id].properties.update(initial_properties)
print(f"Registered device {device_id} in status tracker")
return True
async def unregister_device(self, device_id: str) -> bool:
"""
Remove a device from the status tracking system
"""
if device_id not in self.devices:
print(f"Device {device_id} not found in status tracker")
return False
del self.devices[device_id]
# Remove any callbacks associated with this device
if device_id in self.status_callbacks:
del self.status_callbacks[device_id]
print(f"Unregistered device {device_id} from status tracker")
return True
async def update_device_status(self, device_id: str, new_status: DeviceStatus, reason: str = None) -> bool:
"""
Update the status of a device
"""
if device_id not in self.devices:
print(f"Device {device_id} not found in status tracker")
return False
old_status = self.devices[device_id].status
self.devices[device_id].update_status(new_status, reason)
# Trigger callbacks if status changed
if old_status != new_status:
await self._trigger_status_callbacks(device_id, old_status, new_status, reason)
# Update availability metric
self.devices[device_id].update_availability()
return True
async def update_device_health_status(self, device_id: str, health_status: DeviceHealthStatus) -> bool:
"""
Update the health status of a device
"""
if device_id not in self.devices:
print(f"Device {device_id} not found in status tracker")
return False
self.devices[device_id].update_health_status(health_status)
return True
async def record_device_interaction(self, device_id: str, success: bool, response_time_ms: float = None, error_details: str = None) -> bool:
"""
Record an interaction with the device (success or failure)
"""
if device_id not in self.devices:
print(f"Device {device_id} not found in status tracker")
return False
if success:
self.devices[device_id].record_success(response_time_ms)
else:
self.devices[device_id].record_error(error_details)
# Recalculate health status based on metrics
await self._recalculate_health_status(device_id)
return True
async def get_device_status(self, device_id: str) -> Optional[Dict[str, Any]]:
"""
Get the current status of a specific device
"""
if device_id not in self.devices:
return None
return self.devices[device_id].get_current_status_info()
async def get_all_device_statuses(self) -> Dict[str, Dict[str, Any]]:
"""
Get the status of all tracked devices
"""
statuses = {}
for device_id, record in self.devices.items():
statuses[device_id] = record.get_current_status_info()
return statuses
async def get_devices_by_status(self, status: DeviceStatus) -> List[str]:
"""
Get all devices with a specific status
"""
matching_devices = []
for device_id, record in self.devices.items():
if record.status == status:
matching_devices.append(device_id)
return matching_devices
async def get_devices_by_health_status(self, health_status: DeviceHealthStatus) -> List[str]:
"""
Get all devices with a specific health status
"""
matching_devices = []
for device_id, record in self.devices.items():
if record.health_status == health_status:
matching_devices.append(device_id)
return matching_devices
async def get_status_summary(self) -> Dict[str, Any]:
"""
Get a summary of all device statuses
"""
summary = {
'total_devices': len(self.devices),
'status_counts': {},
'health_counts': {},
'timestamp': datetime.utcnow().isoformat()
}
# Count devices by status
for record in self.devices.values():
status_val = record.status.value
if status_val not in summary['status_counts']:
summary['status_counts'][status_val] = 0
summary['status_counts'][status_val] += 1
# Count devices by health status
for record in self.devices.values():
health_val = record.health_status.value
if health_val not in summary['health_counts']:
summary['health_counts'][health_val] = 0
summary['health_counts'][health_val] += 1
return summary
async def get_device_status_history(self, device_id: str, limit: int = 10) -> Optional[List[Dict[str, Any]]]:
"""
Get the status history for a specific device
"""
if device_id not in self.devices:
return None
history = self.devices[device_id].status_history
# Return the most recent entries
return history[-limit:] if len(history) >= limit else history[:]
async def add_status_callback(self, device_id: str, callback: callable) -> bool:
"""
Add a callback function to be called when the device status changes
"""
if device_id not in self.devices:
print(f"Device {device_id} not found in status tracker")
return False
if device_id not in self.status_callbacks:
self.status_callbacks[device_id] = []
self.status_callbacks[device_id].append(callback)
return True
async def remove_status_callback(self, device_id: str, callback: callable) -> bool:
"""
Remove a callback function
"""
if device_id not in self.status_callbacks:
return False
if callback in self.status_callbacks[device_id]:
self.status_callbacks[device_id].remove(callback)
return True
return False
async def update_device_properties(self, device_id: str, properties: Dict[str, Any]) -> bool:
"""
Update the properties of a device
"""
if device_id not in self.devices:
print(f"Device {device_id} not found in status tracker")
return False
self.devices[device_id].properties.update(properties)
return True
async def _trigger_status_callbacks(self, device_id: str, old_status: DeviceStatus, new_status: DeviceStatus, reason: str = None):
"""
Internal method to trigger status change callbacks
"""
if device_id in self.status_callbacks:
for callback in self.status_callbacks[device_id]:
try:
# Call the callback with device ID, old status, new status, and reason
if asyncio.iscoroutinefunction(callback):
await callback(device_id, old_status, new_status, reason)
else:
callback(device_id, old_status, new_status, reason)
except Exception as e:
print(f"Error in status callback for device {device_id}: {str(e)}")
async def _recalculate_health_status(self, device_id: str):
"""
Internal method to recalculate the health status based on metrics
"""
if device_id not in self.devices:
return
record = self.devices[device_id]
metrics = record.metrics
# Calculate health score based on various factors
# This is a simplified calculation - in reality, this would be more sophisticated
availability_factor = metrics.get('availability', 0)
error_rate_factor = 100 - metrics.get('error_rate', 0)
response_time_factor = 100 - min(100, metrics.get('response_time_avg', 0) / 10) # Assuming avg response time in ms
# Weighted average calculation
health_score = (availability_factor * 0.4 + error_rate_factor * 0.4 + response_time_factor * 0.2)
# Determine health status based on thresholds
if health_score >= self.health_thresholds[DeviceHealthStatus.EXCELLENT]:
new_health_status = DeviceHealthStatus.EXCELLENT
elif health_score >= self.health_thresholds[DeviceHealthStatus.GOOD]:
new_health_status = DeviceHealthStatus.GOOD
elif health_score >= self.health_thresholds[DeviceHealthStatus.FAIR]:
new_health_status = DeviceHealthStatus.FAIR
elif health_score >= self.health_thresholds[DeviceHealthStatus.POOR]:
new_health_status = DeviceHealthStatus.POOR
else:
new_health_status = DeviceHealthStatus.CRITICAL
# Update health status if it has changed
if record.health_status != new_health_status:
record.health_status = new_health_status
# Global instance of the device status tracker
device_status_tracker = DeviceStatusTracker() |