326 lines
11 KiB
Python
326 lines
11 KiB
Python
# Задачи Celery для синхронизации автомобилей и листинга IAAI.
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from concurrent.futures import ThreadPoolExecutor
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import logging
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from threading import Event, Thread
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import time
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import uuid
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from billiard.exceptions import SoftTimeLimitExceeded
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from celery import shared_task
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from redis import Redis
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from ..core.config import Settings
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from ..scraper import IAAIScraper
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from ..storage.db import PersistenceService
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logger = logging.getLogger("iaai_scraper.worker.tasks")
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SYNC_LISTING_LOCK_KEY = "iaai:locks:sync_listing"
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def _retry_with_backoff(func, *, attempts: int = 5, base_delay_s: float = 1.0):
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last_exc: Exception | None = None
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for attempt in range(1, attempts + 1):
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try:
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return func()
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except Exception as exc:
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last_exc = exc
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if attempt >= attempts:
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break
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delay = base_delay_s * (2 ** (attempt - 1))
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logger.warning(
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"Operation failed (attempt %d/%d): %s. Retrying in %.1fs",
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attempt,
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attempts,
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exc,
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delay,
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)
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time.sleep(delay)
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if last_exc is not None:
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raise last_exc
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def _run_browser_job(func, *args, **kwargs):
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# Браузерный код запускаем в отдельном потоке без активного loop.
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# НЕ используем `with` — иначе shutdown(wait=True) заблокирует main thread
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# если SoftTimeLimitExceeded прервёт future.result(), а browser thread ещё работает.
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settings = Settings()
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soft = settings.celery.task_soft_time_limit
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hard = settings.celery.task_time_limit
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# Таймаут для future.result(): берём hard limit (или soft + 120), чтобы не висеть вечно.
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wait_timeout = min(hard, soft + 120) if soft and hard else None
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executor = ThreadPoolExecutor(max_workers=1, thread_name_prefix="iaai-browser")
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future = executor.submit(func, *args, **kwargs)
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try:
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result = future.result(timeout=wait_timeout)
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except SoftTimeLimitExceeded:
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# Отпускаем executor без ожидания — thread умрёт когда Celery убьёт процесс (hard limit).
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future.cancel()
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executor.shutdown(wait=False, cancel_futures=True)
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raise
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except TimeoutError:
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# future.result(timeout=...) вышел по таймауту — browser thread завис.
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future.cancel()
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executor.shutdown(wait=False, cancel_futures=True)
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raise SoftTimeLimitExceeded("Browser thread did not finish within time limit")
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except Exception:
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executor.shutdown(wait=False, cancel_futures=True)
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raise
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else:
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executor.shutdown(wait=True)
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return result
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def _sync_listing_lock_ttl_seconds() -> int:
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settings = Settings()
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soft = settings.celery.task_soft_time_limit
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hard = settings.celery.task_time_limit
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# Используем clamped hard limit (soft + 120), а не сырой task_time_limit,
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# чтобы lock не висел 11 дней при CELERY_TASK_TIME_LIMIT=999999.
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effective_hard = min(hard, soft + 120) if soft else hard
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return max(effective_hard + 120, 300)
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def _get_persistence() -> PersistenceService:
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settings = Settings()
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persistence = PersistenceService(settings)
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def _ping_db() -> None:
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with persistence.engine.connect() as conn:
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conn.exec_driver_sql("SELECT 1")
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_retry_with_backoff(_ping_db, attempts=5, base_delay_s=1.0)
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return persistence
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def _get_redis() -> Redis:
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settings = Settings()
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redis_client = Redis.from_url(settings.redis.url, decode_responses=True)
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def _ping_redis() -> None:
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redis_client.ping()
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_retry_with_backoff(_ping_redis, attempts=5, base_delay_s=1.0)
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return redis_client
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def _acquire_lock(redis_client: Redis, key: str, owner_token: str, ttl_seconds: int) -> bool:
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try:
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acquired = bool(redis_client.set(key, owner_token, nx=True, ex=ttl_seconds))
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if acquired:
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return True
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# Автовосстановление: если lock завис без TTL, считаем stale и пересоздаём.
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ttl = redis_client.ttl(key)
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if ttl is not None and ttl < 0:
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logger.warning("Detected stale lock without TTL, removing: %s", key)
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redis_client.delete(key)
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return bool(redis_client.set(key, owner_token, nx=True, ex=ttl_seconds))
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return False
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except Exception as exc:
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logger.warning("Failed to acquire lock %s", key, exc_info=True)
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return False
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def _refresh_lock_if_owner(redis_client: Redis, key: str, owner_token: str, ttl_seconds: int) -> bool | None:
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try:
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refreshed = redis_client.eval(
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"""
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if redis.call('GET', KEYS[1]) == ARGV[1] then
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return redis.call('EXPIRE', KEYS[1], tonumber(ARGV[2]))
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end
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return 0
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""",
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1,
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key,
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owner_token,
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int(ttl_seconds),
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)
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return bool(refreshed)
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except Exception as exc:
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logger.warning("Failed to refresh lock %s", key, exc_info=True)
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return None
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def _release_lock_if_owner(redis_client: Redis, key: str, owner_token: str) -> None:
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try:
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redis_client.eval(
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"""
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if redis.call('GET', KEYS[1]) == ARGV[1] then
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return redis.call('DEL', KEYS[1])
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end
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return 0
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""",
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1,
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key,
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owner_token,
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)
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except Exception as exc:
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logger.warning("Failed to release lock %s", key, exc_info=True)
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def _start_lock_heartbeat(
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redis_client: Redis,
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key: str,
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owner_token: str,
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ttl_seconds: int,
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) -> tuple[Event, Thread]:
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stop_event = Event()
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interval_seconds = max(5.0, min(30.0, ttl_seconds / 3))
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def _heartbeat() -> None:
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while not stop_event.wait(interval_seconds):
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refreshed = _refresh_lock_if_owner(redis_client, key, owner_token, ttl_seconds)
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if refreshed is False:
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logger.warning("Lost sync_listing lock ownership for %s", owner_token)
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return
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thread = Thread(target=_heartbeat, name="sync-listing-lock-heartbeat", daemon=True)
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thread.start()
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return stop_event, thread
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@shared_task(
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name="iaai_scraper.worker.tasks.sync_vehicle_task",
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bind=True,
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max_retries=2,
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default_retry_delay=30,
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acks_late=True,
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)
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def sync_vehicle_task(self, vehicle_url: str, lane: str = "iaai"):
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# Скрапинг и upsert одного автомобиля.
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persistence = _get_persistence()
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persistence.create_tables()
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try:
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def _job():
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with IAAIScraper() as scraper:
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return scraper.sync_vehicle(vehicle_url, lane=lane)
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result = _run_browser_job(_job)
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logger.info("sync_vehicle_task completed: %s", vehicle_url)
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return {
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"status": "success",
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"vehicle_url": vehicle_url,
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"db_action": result.get("db_action"),
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"images_upserted": result.get("images_upserted", 0),
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}
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except Exception as exc:
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logger.error("sync_vehicle_task failed: %s — %s", vehicle_url, exc, exc_info=True)
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raise self.retry(exc=exc)
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@shared_task(
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name="iaai_scraper.worker.tasks.sync_listing_task",
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bind=True,
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max_retries=3,
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default_retry_delay=120,
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acks_late=True,
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)
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def sync_listing_task(
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self,
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make: str | None = None,
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model: str | None = None,
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lane: str = "iaai_cars",
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limit: int | None = None,
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only_new: bool | None = None,
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):
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# Полный цикл: листинг + sync всех найденных машин.
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persistence = _get_persistence()
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persistence.create_tables()
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task_id = self.request.id or "unknown"
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owner_token = f"{task_id}:{uuid.uuid4().hex}"
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redis_client = _get_redis()
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lock_acquired = False
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lock_ttl = _sync_listing_lock_ttl_seconds()
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heartbeat_stop: Event | None = None
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heartbeat_thread: Thread | None = None
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lock_acquired = _acquire_lock(redis_client, SYNC_LISTING_LOCK_KEY, owner_token, lock_ttl)
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if not lock_acquired:
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logger.info("sync_listing_task skipped: another sync is already running")
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return {
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"status": "skipped",
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"reason": "sync_already_running",
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"task_id": task_id,
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}
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try:
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heartbeat_stop, heartbeat_thread = _start_lock_heartbeat(
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redis_client,
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SYNC_LISTING_LOCK_KEY,
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owner_token,
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lock_ttl,
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)
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self.update_state(state="STARTED", meta={"stage": "sync_listing_started", "task_id": task_id})
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def _job():
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with IAAIScraper() as scraper:
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return scraper.sync_listing(
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make=make,
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model=model,
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lane=lane,
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limit=limit,
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only_new=only_new,
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)
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result = _run_browser_job(_job)
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summary = {
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"task_id": task_id,
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"run_id": result.get("run_id"),
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"status": result.get("status", "success"),
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"cars_upserted": result.get("cars_upserted", 0),
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"cars_failed": result.get("cars_failed", 0),
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"images_upserted": result.get("images_upserted", 0),
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"skipped_existing": result.get("skipped_existing", 0),
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"elapsed_seconds": result.get("elapsed_seconds"),
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"failures_count": len(result.get("failures") or []),
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}
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logger.info(
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"sync_listing_task completed: status=%s, %d upserted, %d failed, failures=%d",
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summary["status"],
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summary["cars_upserted"],
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summary["cars_failed"],
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summary["failures_count"],
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)
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return summary
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except SoftTimeLimitExceeded:
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logger.warning(
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"sync_listing_task soft timeout exceeded — partial progress already saved to DB"
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)
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# Partial progress уже записан в БД через finish_sync_run.
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# Не retry — следующий beat подхватит новые URL автоматически.
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return {
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"status": "timed_out",
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"task_id": task_id,
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"reason": "soft_time_limit_exceeded",
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"note": "partial progress saved to DB; next beat cycle will continue",
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}
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except Exception as exc:
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logger.error("sync_listing_task failed: %s", exc, exc_info=True)
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# Retry только на не-таймаутные ошибки (сеть, БД, браузер).
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try:
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raise self.retry(exc=exc)
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except self.MaxRetriesExceededError:
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logger.error("sync_listing_task max retries exceeded, giving up")
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return {
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"status": "failed",
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"task_id": task_id,
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"error": str(exc),
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}
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finally:
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if heartbeat_stop is not None:
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heartbeat_stop.set()
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if heartbeat_thread is not None:
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heartbeat_thread.join(timeout=max(1.0, min(5.0, lock_ttl / 10)))
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if lock_acquired:
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_release_lock_if_owner(redis_client, SYNC_LISTING_LOCK_KEY, owner_token)
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