# Задачи Celery для синхронизации автомобилей и листинга IAAI. from concurrent.futures import ThreadPoolExecutor import logging from threading import Event, Thread import time import uuid from billiard.exceptions import SoftTimeLimitExceeded from celery import shared_task from redis import Redis from ..core.config import Settings, parse_listing_segments from ..scraper import IAAIScraper from ..storage.db import PersistenceService logger = logging.getLogger("iaai_scraper.worker.tasks") SYNC_LISTING_LOCK_KEY = "iaai:locks:sync_listing" SYNC_FULL_SCAN_DONE_KEY = "iaai:state:sync_full_scan_done" SYNC_LISTING_CHECKPOINT_KEY = "iaai:state:sync_listing_checkpoint" SYNC_LISTING_CHECKPOINT_TTL_SECONDS = 7 * 24 * 60 * 60 SYNC_LISTING_BOOTSTRAP_FAILURE_STREAK_KEY = "iaai:state:sync_listing_bootstrap_failure_streak" SYNC_LISTING_BOOTSTRAP_FAILURE_STREAK_LIMIT = 3 SYNC_LISTING_BOOTSTRAP_FAILURE_STREAK_TTL_SECONDS = 24 * 60 * 60 SYNC_LISTING_FOLLOWUP_PENDING_KEY = "iaai:state:sync_listing_followup_pending" SYNC_LISTING_TASK_NAME = "iaai_scraper.worker.tasks.sync_listing_task" def _retry_with_backoff(func, *, attempts: int = 5, base_delay_s: float = 1.0): last_exc: Exception | None = None for attempt in range(1, attempts + 1): try: return func() except Exception as exc: last_exc = exc if attempt >= attempts: break delay = base_delay_s * (2 ** (attempt - 1)) logger.warning( "Operation failed (attempt %d/%d): %s. Retrying in %.1fs", attempt, attempts, exc, delay, ) time.sleep(delay) if last_exc is not None: raise last_exc def _run_browser_job(func, *args, **kwargs): # Браузерный код запускаем в отдельном потоке без активного loop. # НЕ используем `with` — иначе shutdown(wait=True) заблокирует main thread # если SoftTimeLimitExceeded прервёт future.result(), а browser thread ещё работает. settings = Settings() soft = settings.celery.task_soft_time_limit hard = settings.celery.task_time_limit # Таймаут для future.result(): берём hard limit (или soft + 120), чтобы не висеть вечно. wait_timeout = min(hard, soft + 120) if soft and hard else None executor = ThreadPoolExecutor(max_workers=1, thread_name_prefix="iaai-browser") future = executor.submit(func, *args, **kwargs) try: result = future.result(timeout=wait_timeout) except SoftTimeLimitExceeded: # Отпускаем executor без ожидания — thread умрёт когда Celery убьёт процесс (hard limit). future.cancel() executor.shutdown(wait=False, cancel_futures=True) raise except TimeoutError: # future.result(timeout=...) вышел по таймауту — browser thread завис. future.cancel() executor.shutdown(wait=False, cancel_futures=True) raise SoftTimeLimitExceeded("Browser thread did not finish within time limit") except Exception: executor.shutdown(wait=False, cancel_futures=True) raise else: executor.shutdown(wait=True) return result def _sync_listing_lock_ttl_seconds() -> int: settings = Settings() soft = settings.celery.task_soft_time_limit hard = settings.celery.task_time_limit # Используем clamped hard limit (soft + 120), а не сырой task_time_limit, # чтобы lock не висел 11 дней при CELERY_TASK_TIME_LIMIT=999999. effective_hard = min(hard, soft + 120) if soft else hard return max(effective_hard + 120, 300) def _get_persistence() -> PersistenceService: settings = Settings() persistence = PersistenceService(settings) def _ping_db() -> None: with persistence.engine.connect() as conn: conn.exec_driver_sql("SELECT 1") _retry_with_backoff(_ping_db, attempts=5, base_delay_s=1.0) return persistence def _get_redis() -> Redis: settings = Settings() redis_client = Redis.from_url( settings.redis.url, decode_responses=True, socket_connect_timeout=settings.redis.socket_connect_timeout_seconds, socket_timeout=settings.redis.socket_timeout_seconds, health_check_interval=settings.redis.health_check_interval_seconds, retry_on_timeout=True, ) def _ping_redis() -> None: redis_client.ping() _retry_with_backoff(_ping_redis, attempts=5, base_delay_s=1.0) return redis_client def _acquire_lock(redis_client: Redis, key: str, owner_token: str, ttl_seconds: int) -> bool: try: acquired = bool(redis_client.set(key, owner_token, nx=True, ex=ttl_seconds)) if acquired: return True # Автовосстановление: если lock завис без TTL, считаем stale и пересоздаём. ttl = redis_client.ttl(key) if ttl is not None and ttl < 0: logger.warning("Detected stale lock without TTL, removing: %s", key) redis_client.delete(key) return bool(redis_client.set(key, owner_token, nx=True, ex=ttl_seconds)) return False except Exception as exc: logger.warning("Failed to acquire lock %s", key, exc_info=True) return False def _refresh_lock_if_owner(redis_client: Redis, key: str, owner_token: str, ttl_seconds: int) -> bool | None: try: refreshed = redis_client.eval( """ if redis.call('GET', KEYS[1]) == ARGV[1] then return redis.call('EXPIRE', KEYS[1], tonumber(ARGV[2])) end return 0 """, 1, key, owner_token, int(ttl_seconds), ) return bool(refreshed) except Exception as exc: logger.warning("Failed to refresh lock %s", key, exc_info=True) return None def _release_lock_if_owner(redis_client: Redis, key: str, owner_token: str) -> None: try: redis_client.eval( """ if redis.call('GET', KEYS[1]) == ARGV[1] then return redis.call('DEL', KEYS[1]) end return 0 """, 1, key, owner_token, ) except Exception as exc: logger.warning("Failed to release lock %s", key, exc_info=True) def _has_running_sync_listing_tasks(celery_app, *, exclude_task_id: str | None = None) -> bool: try: inspector = celery_app.control.inspect(timeout=1.0) snapshots = [ inspector.active() or {}, inspector.reserved() or {}, inspector.scheduled() or {}, ] except Exception: logger.warning("Failed to inspect Celery workers for running sync tasks", exc_info=True) return True for snapshot in snapshots: for entries in snapshot.values(): for entry in entries or []: task_name = str(entry.get("name") or entry.get("request", {}).get("name") or "") if task_name != SYNC_LISTING_TASK_NAME: continue # Исключаем текущую задачу — она не считается "другой запущенной" entry_id = str(entry.get("id") or entry.get("request", {}).get("id") or "") if exclude_task_id and entry_id == exclude_task_id: continue return True return False def _clear_orphan_sync_listing_lock(redis_client: Redis, celery_app, *, current_task_id: str | None = None) -> bool: try: owner_token = redis_client.get(SYNC_LISTING_LOCK_KEY) if not owner_token: return False except Exception: logger.warning("Failed to read sync listing lock before cleanup", exc_info=True) return False if _has_running_sync_listing_tasks(celery_app, exclude_task_id=current_task_id): logger.info("sync_listing lock preserved: active task still detected") return False try: ttl = redis_client.ttl(SYNC_LISTING_LOCK_KEY) redis_client.delete(SYNC_LISTING_LOCK_KEY) logger.warning( "Removed orphan sync_listing lock owner=%s ttl=%s after worker restart", owner_token, ttl, ) return True except Exception: logger.warning("Failed to clear orphan sync listing lock", exc_info=True) return False def _is_full_scan_done(redis_client: Redis) -> bool: try: value = redis_client.get(SYNC_FULL_SCAN_DONE_KEY) except Exception: logger.warning("Failed to read full scan state", exc_info=True) return False return str(value or "").strip() == "1" def _set_full_scan_done(redis_client: Redis, done: bool) -> None: try: redis_client.set(SYNC_FULL_SCAN_DONE_KEY, "1" if done else "0") except Exception: logger.warning("Failed to persist full scan state", exc_info=True) def _load_last_completed_segment(redis_client: Redis) -> int | None: # Segment-only checkpoint: хранит индекс последнего ПОЛНОСТЬЮ пройденного сегмента. try: raw = redis_client.get(SYNC_LISTING_CHECKPOINT_KEY) except Exception: logger.warning("Failed to read sync listing checkpoint", exc_info=True) return None if raw is None: return None try: value = int(str(raw).strip()) except (TypeError, ValueError): logger.warning("Invalid sync listing checkpoint value %r; clearing", raw) _clear_sync_checkpoint(redis_client) return None if value < 0: _clear_sync_checkpoint(redis_client) return None return value def _save_last_completed_segment(redis_client: Redis, segment_index: int) -> None: try: redis_client.set( SYNC_LISTING_CHECKPOINT_KEY, str(int(segment_index)), ex=SYNC_LISTING_CHECKPOINT_TTL_SECONDS, ) except Exception: logger.warning("Failed to save sync listing checkpoint", exc_info=True) def _clear_sync_checkpoint(redis_client: Redis) -> None: try: redis_client.delete(SYNC_LISTING_CHECKPOINT_KEY) except Exception: logger.warning("Failed to clear sync listing checkpoint", exc_info=True) def _try_set_followup_pending(redis_client: Redis, *, ttl_seconds: int) -> bool: try: return bool(redis_client.set(SYNC_LISTING_FOLLOWUP_PENDING_KEY, "1", nx=True, ex=max(60, int(ttl_seconds)))) except Exception: logger.warning("Failed to set follow-up pending flag", exc_info=True) return True def _clear_followup_pending(redis_client: Redis) -> None: try: redis_client.delete(SYNC_LISTING_FOLLOWUP_PENDING_KEY) except Exception: logger.warning("Failed to clear follow-up pending flag", exc_info=True) def _bump_bootstrap_failure_streak( redis_client: Redis, *, reason: str, ) -> tuple[int, bool]: try: streak = int(redis_client.incr(SYNC_LISTING_BOOTSTRAP_FAILURE_STREAK_KEY)) redis_client.expire( SYNC_LISTING_BOOTSTRAP_FAILURE_STREAK_KEY, SYNC_LISTING_BOOTSTRAP_FAILURE_STREAK_TTL_SECONDS, ) except Exception: logger.warning("Failed to update bootstrap failure streak", exc_info=True) return 0, True should_enqueue = streak < SYNC_LISTING_BOOTSTRAP_FAILURE_STREAK_LIMIT if should_enqueue: logger.warning( "Bootstrap failure streak %d/%d recorded (reason=%s)", streak, SYNC_LISTING_BOOTSTRAP_FAILURE_STREAK_LIMIT, reason, ) else: logger.error( "Bootstrap follow-up circuit breaker opened after %d consecutive failures (reason=%s)", streak, reason, ) return streak, should_enqueue def _clear_bootstrap_failure_streak(redis_client: Redis) -> None: try: redis_client.delete(SYNC_LISTING_BOOTSTRAP_FAILURE_STREAK_KEY) except Exception: logger.warning("Failed to clear bootstrap failure streak", exc_info=True) def _start_lock_heartbeat( redis_client: Redis, key: str, owner_token: str, ttl_seconds: int, ) -> tuple[Event, Thread]: stop_event = Event() interval_seconds = max(5.0, min(30.0, ttl_seconds / 3)) def _heartbeat() -> None: while not stop_event.wait(interval_seconds): refreshed = _refresh_lock_if_owner(redis_client, key, owner_token, ttl_seconds) if refreshed is False: logger.warning("Lost sync_listing lock ownership for %s", owner_token) return thread = Thread(target=_heartbeat, name="sync-listing-lock-heartbeat", daemon=True) thread.start() return stop_event, thread @shared_task( name="iaai_scraper.worker.tasks.sync_vehicle_task", bind=True, max_retries=2, default_retry_delay=30, acks_late=True, ) def sync_vehicle_task(self, vehicle_url: str, lane: str = "iaai"): # Скрапинг и upsert одного автомобиля. persistence = _get_persistence() persistence.create_tables() try: def _job(): with IAAIScraper() as scraper: return scraper.sync_vehicle(vehicle_url, lane=lane) result = _run_browser_job(_job) logger.info("sync_vehicle_task completed: %s", vehicle_url) return { "status": "success", "vehicle_url": vehicle_url, "db_action": result.get("db_action"), "images_upserted": result.get("images_upserted", 0), } except Exception as exc: logger.error("sync_vehicle_task failed: %s — %s", vehicle_url, exc, exc_info=True) raise self.retry(exc=exc) @shared_task( name="iaai_scraper.worker.tasks.sync_listing_task", bind=True, max_retries=3, default_retry_delay=120, acks_late=True, ) def sync_listing_task( self, make: str | None = None, model: str | None = None, lane: str = "iaai_cars", limit: int | None = None, only_new: bool | None = None, ): # Полный цикл: листинг + sync всех найденных машин. persistence = _get_persistence() persistence.create_tables() task_id = self.request.id or "unknown" owner_token = f"{task_id}:{uuid.uuid4().hex}" redis_client = _get_redis() lock_acquired = False lock_ttl = _sync_listing_lock_ttl_seconds() heartbeat_stop: Event | None = None heartbeat_thread: Thread | None = None force_bootstrap_full_scan = False def _enqueue_bootstrap_followup( reason: str, delay_seconds: int = 5, *, count_as_failure: bool = False, ) -> None: flag_ttl = max(lock_ttl, delay_seconds + 300) if not _try_set_followup_pending(redis_client, ttl_seconds=flag_ttl): logger.info( "Bootstrap follow-up already pending; skip enqueue (reason=%s)", reason, ) return if count_as_failure: _, should_enqueue = _bump_bootstrap_failure_streak(redis_client, reason=reason) if not should_enqueue: _clear_followup_pending(redis_client) return else: _clear_bootstrap_failure_streak(redis_client) try: self.app.send_task( "iaai_scraper.worker.tasks.sync_listing_task", kwargs={ "make": make, "model": model, "lane": lane, "limit": limit, "only_new": only_new, }, queue="scraping", countdown=max(0, int(delay_seconds)), ) logger.info( "Bootstrap follow-up sync queued in %ss (reason=%s)", delay_seconds, reason, ) except Exception: _clear_followup_pending(redis_client) logger.warning("Failed to enqueue bootstrap follow-up sync", exc_info=True) lock_acquired = _acquire_lock(redis_client, SYNC_LISTING_LOCK_KEY, owner_token, lock_ttl) if not lock_acquired: orphan_cleared = _clear_orphan_sync_listing_lock(redis_client, self.app, current_task_id=task_id) if orphan_cleared: lock_acquired = _acquire_lock(redis_client, SYNC_LISTING_LOCK_KEY, owner_token, lock_ttl) if not lock_acquired: logger.info("sync_listing_task skipped: another sync is already running") return { "status": "skipped", "reason": "sync_already_running", "task_id": task_id, } try: full_scan_done_before_run = _is_full_scan_done(redis_client) force_bootstrap_full_scan = not full_scan_done_before_run effective_limit = None if force_bootstrap_full_scan else limit effective_only_new = False if force_bootstrap_full_scan else only_new # Segment-level checkpoint: хранит индекс последнего ПОЛНОСТЬЮ пройденного сегмента. # Используется только во время bootstrap для пропуска уже обработанных сегментов. # Никаких page-level resume — внутри сегмента всегда стартуем с page 1. last_completed_segment: int | None = None if force_bootstrap_full_scan: last_completed_segment = _load_last_completed_segment(redis_client) else: # После завершения bootstrap чекпоинт не нужен никогда. _clear_sync_checkpoint(redis_client) if force_bootstrap_full_scan: logger.info( "Bootstrap mode: forcing full scan (only_new=False, limit=None) until first complete run", ) logger.info( "sync_listing options: only_new=%s, limit=%s", effective_only_new, effective_limit, ) _clear_followup_pending(redis_client) heartbeat_stop, heartbeat_thread = _start_lock_heartbeat( redis_client, SYNC_LISTING_LOCK_KEY, owner_token, lock_ttl, ) self.update_state(state="STARTED", meta={"stage": "sync_listing_started", "task_id": task_id}) # Определяем сегменты из конфига. settings = Settings() segments = parse_listing_segments(settings.listing.listing_segments_json) use_segmented = bool(segments) and make is None and model is None resume_from_segment = 0 if force_bootstrap_full_scan and use_segmented and last_completed_segment is not None: resume_from_segment = max(0, last_completed_segment + 1) if resume_from_segment >= len(segments): # Все сегменты уже пройдены — чекпоинт устарел, начинаем заново. logger.info( "Stored checkpoint segment=%d is beyond configured segments (%d); restarting bootstrap from segment 0", last_completed_segment, len(segments), ) resume_from_segment = 0 _clear_sync_checkpoint(redis_client) elif resume_from_segment > 0: logger.warning( "Resuming segmented bootstrap from segment=%d (last completed=%d)", resume_from_segment, last_completed_segment, ) def _job(): with IAAIScraper() as scraper: if use_segmented: return scraper.sync_listing_segmented( segments=segments, lane=lane, only_new=effective_only_new, start_segment=resume_from_segment, start_page=1, progress_callback=( (lambda seg_idx: _save_last_completed_segment(redis_client, seg_idx)) if force_bootstrap_full_scan else None ), ) return scraper.sync_listing( make=make, model=model, lane=lane, limit=effective_limit, only_new=effective_only_new, ) result = _run_browser_job(_job) if force_bootstrap_full_scan: bootstrap_completed = bool(result.get("full_scan_completed")) if bootstrap_completed: _set_full_scan_done(redis_client, True) _clear_sync_checkpoint(redis_client) _clear_bootstrap_failure_streak(redis_client) logger.info("Bootstrap full scan completed; hourly schedule continues") else: _set_full_scan_done(redis_client, False) listing_payload = result.get("listing") if isinstance(result.get("listing"), dict) else {} had_progress = any( int(result.get(key) or 0) > 0 for key in ("cars_upserted", "images_upserted", "skipped_existing", "total_discovered") ) or int(listing_payload.get("vehicles_collected") or 0) > 0 count_as_failure = str(result.get("status") or "") == "failed" and not had_progress logger.info("Bootstrap full scan not complete yet; queuing immediate continuation") _enqueue_bootstrap_followup( "bootstrap_not_completed", count_as_failure=count_as_failure, ) else: _clear_sync_checkpoint(redis_client) summary = { "task_id": task_id, "run_id": result.get("run_id"), "status": result.get("status", "success"), "cars_upserted": result.get("cars_upserted", 0), "cars_failed": result.get("cars_failed", 0), "images_upserted": result.get("images_upserted", 0), "skipped_existing": result.get("skipped_existing", 0), "elapsed_seconds": result.get("elapsed_seconds"), "failures_count": len(result.get("failures") or []), } logger.info( "sync_listing_task completed: status=%s, %d upserted, %d failed, failures=%d", summary["status"], summary["cars_upserted"], summary["cars_failed"], summary["failures_count"], ) return summary except SoftTimeLimitExceeded: logger.warning( "sync_listing_task soft timeout exceeded — partial progress already saved to DB" ) if force_bootstrap_full_scan: _set_full_scan_done(redis_client, False) # SoftTimeLimit считаем failure для circuit breaker: # если сегмент систематически не укладывается в time limit, # нельзя крутить followup бесконечно. _enqueue_bootstrap_followup("soft_time_limit_exceeded", count_as_failure=True) # Partial progress уже записан в БД через finish_sync_run. # Не retry — следующий запуск продолжит обработку по расписанию. return { "status": "timed_out", "task_id": task_id, "reason": "soft_time_limit_exceeded", "note": "partial progress saved to DB; bootstrap continuation queued", } except Exception as exc: logger.error("sync_listing_task failed: %s", exc, exc_info=True) # Retry только на не-таймаутные ошибки (сеть, БД, браузер). try: if force_bootstrap_full_scan: _set_full_scan_done(redis_client, False) raise self.retry(exc=exc, countdown=5) raise self.retry(exc=exc) except self.MaxRetriesExceededError: logger.error("sync_listing_task max retries exceeded, giving up") if force_bootstrap_full_scan: _set_full_scan_done(redis_client, False) _enqueue_bootstrap_followup("max_retries_exceeded", count_as_failure=True) return { "status": "failed", "task_id": task_id, "error": str(exc), } finally: if heartbeat_stop is not None: heartbeat_stop.set() if heartbeat_thread is not None: heartbeat_thread.join(timeout=max(1.0, min(5.0, lock_ttl / 10))) if lock_acquired: _release_lock_if_owner(redis_client, SYNC_LISTING_LOCK_KEY, owner_token)