File size: 14,397 Bytes
eebf5c4 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 |
"""
WebSocket Service
Handles real-time data updates to connected clients
"""
import asyncio
import json
import logging
from typing import Dict, Set, Any, List, Optional
from datetime import datetime
from fastapi import WebSocket, WebSocketDisconnect
from collections import defaultdict
logger = logging.getLogger(__name__)
class ConnectionManager:
"""Manages WebSocket connections and broadcasts"""
def __init__(self):
# Active connections by client ID
self.active_connections: Dict[str, WebSocket] = {}
# Subscriptions: {api_id: set(client_ids)}
self.subscriptions: Dict[str, Set[str]] = defaultdict(set)
# Reverse subscriptions: {client_id: set(api_ids)}
self.client_subscriptions: Dict[str, Set[str]] = defaultdict(set)
# Connection metadata
self.connection_metadata: Dict[str, Dict[str, Any]] = {}
async def connect(self, websocket: WebSocket, client_id: str, metadata: Optional[Dict] = None):
"""
Connect a new WebSocket client
Args:
websocket: WebSocket connection
client_id: Unique client identifier
metadata: Optional metadata about the connection
"""
await websocket.accept()
self.active_connections[client_id] = websocket
self.connection_metadata[client_id] = metadata or {}
logger.info(f"Client {client_id} connected. Total connections: {len(self.active_connections)}")
def disconnect(self, client_id: str):
"""
Disconnect a WebSocket client
Args:
client_id: Client identifier
"""
if client_id in self.active_connections:
del self.active_connections[client_id]
# Remove all subscriptions for this client
for api_id in self.client_subscriptions.get(client_id, set()).copy():
self.unsubscribe(client_id, api_id)
if client_id in self.client_subscriptions:
del self.client_subscriptions[client_id]
if client_id in self.connection_metadata:
del self.connection_metadata[client_id]
logger.info(f"Client {client_id} disconnected. Total connections: {len(self.active_connections)}")
def subscribe(self, client_id: str, api_id: str):
"""
Subscribe a client to API updates
Args:
client_id: Client identifier
api_id: API identifier to subscribe to
"""
self.subscriptions[api_id].add(client_id)
self.client_subscriptions[client_id].add(api_id)
logger.debug(f"Client {client_id} subscribed to {api_id}")
def unsubscribe(self, client_id: str, api_id: str):
"""
Unsubscribe a client from API updates
Args:
client_id: Client identifier
api_id: API identifier to unsubscribe from
"""
if api_id in self.subscriptions:
self.subscriptions[api_id].discard(client_id)
# Clean up empty subscription sets
if not self.subscriptions[api_id]:
del self.subscriptions[api_id]
if client_id in self.client_subscriptions:
self.client_subscriptions[client_id].discard(api_id)
logger.debug(f"Client {client_id} unsubscribed from {api_id}")
def subscribe_all(self, client_id: str):
"""
Subscribe a client to all API updates
Args:
client_id: Client identifier
"""
self.client_subscriptions[client_id].add('*')
logger.debug(f"Client {client_id} subscribed to all updates")
async def send_personal_message(self, message: Dict[str, Any], client_id: str):
"""
Send a message to a specific client
Args:
message: Message data
client_id: Target client identifier
"""
if client_id in self.active_connections:
websocket = self.active_connections[client_id]
try:
await websocket.send_json(message)
except Exception as e:
logger.error(f"Error sending message to {client_id}: {e}")
self.disconnect(client_id)
async def broadcast(self, message: Dict[str, Any], api_id: Optional[str] = None):
"""
Broadcast a message to subscribed clients
Args:
message: Message data
api_id: Optional API ID (broadcasts to all if None)
"""
if api_id:
# Send to clients subscribed to this specific API
target_clients = self.subscriptions.get(api_id, set())
# Also include clients subscribed to all updates
target_clients = target_clients.union(
{cid for cid, subs in self.client_subscriptions.items() if '*' in subs}
)
else:
# Broadcast to all connected clients
target_clients = set(self.active_connections.keys())
# Send to all target clients
disconnected_clients = []
for client_id in target_clients:
if client_id in self.active_connections:
websocket = self.active_connections[client_id]
try:
await websocket.send_json(message)
except Exception as e:
logger.error(f"Error broadcasting to {client_id}: {e}")
disconnected_clients.append(client_id)
# Clean up disconnected clients
for client_id in disconnected_clients:
self.disconnect(client_id)
async def broadcast_api_update(self, api_id: str, data: Dict[str, Any], metadata: Optional[Dict] = None):
"""
Broadcast an API data update
Args:
api_id: API identifier
data: Updated data
metadata: Optional metadata about the update
"""
message = {
'type': 'api_update',
'api_id': api_id,
'data': data,
'metadata': metadata or {},
'timestamp': datetime.now().isoformat()
}
await self.broadcast(message, api_id)
async def broadcast_status_update(self, status: Dict[str, Any]):
"""
Broadcast a system status update
Args:
status: Status data
"""
message = {
'type': 'status_update',
'status': status,
'timestamp': datetime.now().isoformat()
}
await self.broadcast(message)
async def broadcast_schedule_update(self, schedule_info: Dict[str, Any]):
"""
Broadcast a schedule update
Args:
schedule_info: Schedule information
"""
message = {
'type': 'schedule_update',
'schedule': schedule_info,
'timestamp': datetime.now().isoformat()
}
await self.broadcast(message)
def get_connection_stats(self) -> Dict[str, Any]:
"""
Get connection statistics
Returns:
Statistics about connections and subscriptions
"""
return {
'total_connections': len(self.active_connections),
'total_subscriptions': sum(len(subs) for subs in self.subscriptions.values()),
'apis_with_subscribers': len(self.subscriptions),
'clients': {
client_id: {
'subscriptions': list(self.client_subscriptions.get(client_id, set())),
'metadata': self.connection_metadata.get(client_id, {})
}
for client_id in self.active_connections.keys()
}
}
class WebSocketService:
"""WebSocket service for real-time updates"""
def __init__(self, scheduler_service=None, persistence_service=None):
self.connection_manager = ConnectionManager()
self.scheduler_service = scheduler_service
self.persistence_service = persistence_service
self.running = False
# Register callbacks with scheduler if available
if self.scheduler_service:
self._register_scheduler_callbacks()
def _register_scheduler_callbacks(self):
"""Register callbacks with the scheduler service"""
# This would be called after scheduler is initialized
# For now, we'll use a different approach where scheduler calls websocket service
pass
async def handle_client_message(self, websocket: WebSocket, client_id: str, message: Dict[str, Any]):
"""
Handle incoming messages from clients
Args:
websocket: WebSocket connection
client_id: Client identifier
message: Message from client
"""
try:
message_type = message.get('type')
if message_type == 'subscribe':
# Subscribe to specific API
api_id = message.get('api_id')
if api_id:
self.connection_manager.subscribe(client_id, api_id)
await self.connection_manager.send_personal_message({
'type': 'subscribed',
'api_id': api_id,
'status': 'success'
}, client_id)
elif message_type == 'subscribe_all':
# Subscribe to all updates
self.connection_manager.subscribe_all(client_id)
await self.connection_manager.send_personal_message({
'type': 'subscribed',
'api_id': '*',
'status': 'success'
}, client_id)
elif message_type == 'unsubscribe':
# Unsubscribe from specific API
api_id = message.get('api_id')
if api_id:
self.connection_manager.unsubscribe(client_id, api_id)
await self.connection_manager.send_personal_message({
'type': 'unsubscribed',
'api_id': api_id,
'status': 'success'
}, client_id)
elif message_type == 'get_data':
# Request current cached data
api_id = message.get('api_id')
if api_id and self.persistence_service:
data = self.persistence_service.get_cached_data(api_id)
await self.connection_manager.send_personal_message({
'type': 'data_response',
'api_id': api_id,
'data': data
}, client_id)
elif message_type == 'get_all_data':
# Request all cached data
if self.persistence_service:
data = self.persistence_service.get_all_cached_data()
await self.connection_manager.send_personal_message({
'type': 'data_response',
'data': data
}, client_id)
elif message_type == 'get_schedule':
# Request schedule information
if self.scheduler_service:
schedules = self.scheduler_service.get_all_task_statuses()
await self.connection_manager.send_personal_message({
'type': 'schedule_response',
'schedules': schedules
}, client_id)
elif message_type == 'update_schedule':
# Update schedule for an API
api_id = message.get('api_id')
interval = message.get('interval')
enabled = message.get('enabled')
if api_id and self.scheduler_service:
self.scheduler_service.update_task_schedule(api_id, interval, enabled)
await self.connection_manager.send_personal_message({
'type': 'schedule_updated',
'api_id': api_id,
'status': 'success'
}, client_id)
elif message_type == 'force_update':
# Force immediate update for an API
api_id = message.get('api_id')
if api_id and self.scheduler_service:
success = await self.scheduler_service.force_update(api_id)
await self.connection_manager.send_personal_message({
'type': 'update_result',
'api_id': api_id,
'status': 'success' if success else 'failed'
}, client_id)
elif message_type == 'ping':
# Heartbeat
await self.connection_manager.send_personal_message({
'type': 'pong',
'timestamp': datetime.now().isoformat()
}, client_id)
else:
logger.warning(f"Unknown message type from {client_id}: {message_type}")
except Exception as e:
logger.error(f"Error handling client message: {e}")
await self.connection_manager.send_personal_message({
'type': 'error',
'message': str(e)
}, client_id)
async def notify_data_update(self, api_id: str, data: Dict[str, Any], metadata: Optional[Dict] = None):
"""
Notify clients about data updates
Args:
api_id: API identifier
data: Updated data
metadata: Optional metadata
"""
await self.connection_manager.broadcast_api_update(api_id, data, metadata)
async def notify_status_update(self, status: Dict[str, Any]):
"""
Notify clients about status updates
Args:
status: Status information
"""
await self.connection_manager.broadcast_status_update(status)
async def notify_schedule_update(self, schedule_info: Dict[str, Any]):
"""
Notify clients about schedule updates
Args:
schedule_info: Schedule information
"""
await self.connection_manager.broadcast_schedule_update(schedule_info)
def get_stats(self) -> Dict[str, Any]:
"""Get WebSocket service statistics"""
return self.connection_manager.get_connection_stats()
# Global instance
websocket_service = WebSocketService()
|