File size: 16,851 Bytes
48ae4e0 |
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 |
"""
Intelligent Source Pool Manager
Manages source pools, rotation, and automatic failover
"""
import json
from datetime import datetime, timedelta
from typing import Optional, List, Dict, Any
from threading import Lock
from sqlalchemy.orm import Session
from database.models import (
SourcePool, PoolMember, RotationHistory, RotationState,
Provider, RateLimitUsage
)
from monitoring.rate_limiter import rate_limiter
from utils.logger import setup_logger
logger = setup_logger("source_pool_manager")
class SourcePoolManager:
"""
Manages source pools and intelligent rotation
"""
def __init__(self, db_session: Session):
"""
Initialize source pool manager
Args:
db_session: Database session
"""
self.db = db_session
self.lock = Lock()
logger.info("Source Pool Manager initialized")
def create_pool(
self,
name: str,
category: str,
description: Optional[str] = None,
rotation_strategy: str = "round_robin"
) -> SourcePool:
"""
Create a new source pool
Args:
name: Pool name
category: Pool category
description: Pool description
rotation_strategy: Rotation strategy (round_robin, least_used, priority)
Returns:
Created SourcePool
"""
with self.lock:
pool = SourcePool(
name=name,
category=category,
description=description,
rotation_strategy=rotation_strategy,
enabled=True
)
self.db.add(pool)
self.db.commit()
self.db.refresh(pool)
# Create rotation state
state = RotationState(
pool_id=pool.id,
current_provider_id=None,
rotation_count=0
)
self.db.add(state)
self.db.commit()
logger.info(f"Created source pool: {name} (strategy: {rotation_strategy})")
return pool
def add_to_pool(
self,
pool_id: int,
provider_id: int,
priority: int = 1,
weight: int = 1
) -> PoolMember:
"""
Add a provider to a pool
Args:
pool_id: Pool ID
provider_id: Provider ID
priority: Provider priority (higher = better)
weight: Provider weight for weighted rotation
Returns:
Created PoolMember
"""
with self.lock:
member = PoolMember(
pool_id=pool_id,
provider_id=provider_id,
priority=priority,
weight=weight,
enabled=True,
use_count=0,
success_count=0,
failure_count=0
)
self.db.add(member)
self.db.commit()
self.db.refresh(member)
logger.info(f"Added provider {provider_id} to pool {pool_id}")
return member
def get_next_provider(
self,
pool_id: int,
exclude_rate_limited: bool = True
) -> Optional[Provider]:
"""
Get next provider from pool based on rotation strategy
Args:
pool_id: Pool ID
exclude_rate_limited: Exclude rate-limited providers
Returns:
Next Provider or None if none available
"""
with self.lock:
# Get pool and its members
pool = self.db.query(SourcePool).filter_by(id=pool_id).first()
if not pool or not pool.enabled:
logger.warning(f"Pool {pool_id} not found or disabled")
return None
# Get enabled members with their providers
members = (
self.db.query(PoolMember)
.filter_by(pool_id=pool_id, enabled=True)
.join(Provider)
.filter(Provider.id == PoolMember.provider_id)
.all()
)
if not members:
logger.warning(f"No enabled members in pool {pool_id}")
return None
# Filter out rate-limited providers
if exclude_rate_limited:
available_members = []
for member in members:
provider = self.db.query(Provider).get(member.provider_id)
can_use, _ = rate_limiter.can_make_request(provider.name)
if can_use:
available_members.append(member)
if not available_members:
logger.warning(f"All providers in pool {pool_id} are rate-limited")
# Return highest priority member anyway
available_members = members
else:
available_members = members
# Select provider based on strategy
selected_member = self._select_by_strategy(
pool.rotation_strategy,
available_members
)
if not selected_member:
return None
# Get rotation state
state = self.db.query(RotationState).filter_by(pool_id=pool_id).first()
if not state:
state = RotationState(pool_id=pool_id)
self.db.add(state)
# Record rotation if provider changed
old_provider_id = state.current_provider_id
if old_provider_id != selected_member.provider_id:
self._record_rotation(
pool_id=pool_id,
from_provider_id=old_provider_id,
to_provider_id=selected_member.provider_id,
reason="rotation"
)
# Update state
state.current_provider_id = selected_member.provider_id
state.last_rotation = datetime.utcnow()
state.rotation_count += 1
# Update member stats
selected_member.last_used = datetime.utcnow()
selected_member.use_count += 1
self.db.commit()
provider = self.db.query(Provider).get(selected_member.provider_id)
logger.info(
f"Selected provider {provider.name} from pool {pool.name} "
f"(strategy: {pool.rotation_strategy})"
)
return provider
def _select_by_strategy(
self,
strategy: str,
members: List[PoolMember]
) -> Optional[PoolMember]:
"""
Select a pool member based on rotation strategy
Args:
strategy: Rotation strategy
members: Available pool members
Returns:
Selected PoolMember
"""
if not members:
return None
if strategy == "priority":
# Select highest priority member
return max(members, key=lambda m: m.priority)
elif strategy == "least_used":
# Select least used member
return min(members, key=lambda m: m.use_count)
elif strategy == "weighted":
# Weighted random selection (simple implementation)
# In production, use proper weighted random
return max(members, key=lambda m: m.weight * (1.0 / (m.use_count + 1)))
else: # round_robin (default)
# Select least recently used
never_used = [m for m in members if m.last_used is None]
if never_used:
return never_used[0]
return min(members, key=lambda m: m.last_used)
def _record_rotation(
self,
pool_id: int,
from_provider_id: Optional[int],
to_provider_id: int,
reason: str,
notes: Optional[str] = None
):
"""
Record a rotation event
Args:
pool_id: Pool ID
from_provider_id: Previous provider ID
to_provider_id: New provider ID
reason: Rotation reason
notes: Additional notes
"""
rotation = RotationHistory(
pool_id=pool_id,
from_provider_id=from_provider_id,
to_provider_id=to_provider_id,
rotation_reason=reason,
success=True,
notes=notes
)
self.db.add(rotation)
self.db.commit()
def failover(
self,
pool_id: int,
failed_provider_id: int,
reason: str = "failure"
) -> Optional[Provider]:
"""
Perform failover from a failed provider
Args:
pool_id: Pool ID
failed_provider_id: Failed provider ID
reason: Failure reason
Returns:
Next available provider
"""
with self.lock:
logger.warning(
f"Failover triggered for provider {failed_provider_id} "
f"in pool {pool_id}. Reason: {reason}"
)
# Update failure count for the failed provider
member = (
self.db.query(PoolMember)
.filter_by(pool_id=pool_id, provider_id=failed_provider_id)
.first()
)
if member:
member.failure_count += 1
self.db.commit()
# Get next provider (excluding the failed one)
pool = self.db.query(SourcePool).filter_by(id=pool_id).first()
if not pool:
return None
members = (
self.db.query(PoolMember)
.filter_by(pool_id=pool_id, enabled=True)
.filter(PoolMember.provider_id != failed_provider_id)
.all()
)
if not members:
logger.error(f"No alternative providers available in pool {pool_id}")
return None
# Select next provider
selected_member = self._select_by_strategy(
pool.rotation_strategy,
members
)
if not selected_member:
return None
# Record failover
self._record_rotation(
pool_id=pool_id,
from_provider_id=failed_provider_id,
to_provider_id=selected_member.provider_id,
reason=reason,
notes=f"Automatic failover from provider {failed_provider_id}"
)
# Update rotation state
state = self.db.query(RotationState).filter_by(pool_id=pool_id).first()
if state:
state.current_provider_id = selected_member.provider_id
state.last_rotation = datetime.utcnow()
state.rotation_count += 1
# Update member stats
selected_member.last_used = datetime.utcnow()
selected_member.use_count += 1
self.db.commit()
provider = self.db.query(Provider).get(selected_member.provider_id)
logger.info(f"Failover successful: switched to provider {provider.name}")
return provider
def record_success(self, pool_id: int, provider_id: int):
"""
Record successful use of a provider
Args:
pool_id: Pool ID
provider_id: Provider ID
"""
with self.lock:
member = (
self.db.query(PoolMember)
.filter_by(pool_id=pool_id, provider_id=provider_id)
.first()
)
if member:
member.success_count += 1
self.db.commit()
def record_failure(self, pool_id: int, provider_id: int):
"""
Record failed use of a provider
Args:
pool_id: Pool ID
provider_id: Provider ID
"""
with self.lock:
member = (
self.db.query(PoolMember)
.filter_by(pool_id=pool_id, provider_id=provider_id)
.first()
)
if member:
member.failure_count += 1
self.db.commit()
def get_pool_status(self, pool_id: int) -> Optional[Dict[str, Any]]:
"""
Get comprehensive pool status
Args:
pool_id: Pool ID
Returns:
Pool status dictionary
"""
with self.lock:
pool = self.db.query(SourcePool).filter_by(id=pool_id).first()
if not pool:
return None
# Get rotation state
state = self.db.query(RotationState).filter_by(pool_id=pool_id).first()
# Get current provider
current_provider = None
if state and state.current_provider_id:
provider = self.db.query(Provider).get(state.current_provider_id)
if provider:
current_provider = {
"id": provider.id,
"name": provider.name,
"status": "active"
}
# Get all members with stats
members = []
pool_members = self.db.query(PoolMember).filter_by(pool_id=pool_id).all()
for member in pool_members:
provider = self.db.query(Provider).get(member.provider_id)
if not provider:
continue
# Check rate limit status
rate_status = rate_limiter.get_status(provider.name)
rate_limit_info = None
if rate_status:
rate_limit_info = {
"usage": rate_status['current_usage'],
"limit": rate_status['limit_value'],
"percentage": rate_status['percentage'],
"status": rate_status['status']
}
success_rate = 0
if member.use_count > 0:
success_rate = (member.success_count / member.use_count) * 100
members.append({
"provider_id": provider.id,
"provider_name": provider.name,
"priority": member.priority,
"weight": member.weight,
"enabled": member.enabled,
"use_count": member.use_count,
"success_count": member.success_count,
"failure_count": member.failure_count,
"success_rate": round(success_rate, 2),
"last_used": member.last_used.isoformat() if member.last_used else None,
"rate_limit": rate_limit_info
})
# Get recent rotations
recent_rotations = (
self.db.query(RotationHistory)
.filter_by(pool_id=pool_id)
.order_by(RotationHistory.timestamp.desc())
.limit(10)
.all()
)
rotation_list = []
for rotation in recent_rotations:
from_provider = None
if rotation.from_provider_id:
from_prov = self.db.query(Provider).get(rotation.from_provider_id)
from_provider = from_prov.name if from_prov else None
to_prov = self.db.query(Provider).get(rotation.to_provider_id)
to_provider = to_prov.name if to_prov else None
rotation_list.append({
"timestamp": rotation.timestamp.isoformat(),
"from_provider": from_provider,
"to_provider": to_provider,
"reason": rotation.rotation_reason,
"success": rotation.success
})
return {
"pool_id": pool.id,
"pool_name": pool.name,
"category": pool.category,
"description": pool.description,
"rotation_strategy": pool.rotation_strategy,
"enabled": pool.enabled,
"current_provider": current_provider,
"total_rotations": state.rotation_count if state else 0,
"last_rotation": state.last_rotation.isoformat() if state and state.last_rotation else None,
"members": members,
"recent_rotations": rotation_list
}
def get_all_pools_status(self) -> List[Dict[str, Any]]:
"""
Get status of all pools
Returns:
List of pool status dictionaries
"""
pools = self.db.query(SourcePool).all()
return [
self.get_pool_status(pool.id)
for pool in pools
if self.get_pool_status(pool.id)
]
|