"""统一任务服务：创建、查询、取消任务。""" import json import logging import uuid from datetime import datetime logger = logging.getLogger(__name__) def create_task(user_id: str, artifact_type: str, operation: str, workspace_id: str, title: str = "", input_snapshot: dict = None, idempotency_key: str = None) -> dict: """创建生成任务并提交到 Celery。 返回 {"code": 0, "data": task_dict} 或错误。 """ from insurance.db.compat import db from insurance.models.generation_task import GenerationTask # 幂等检查 if idempotency_key: existing = GenerationTask.query.filter_by( idempotency_key=idempotency_key, ).filter(GenerationTask.status.in_(["queued", "running", "done"])).first() if existing: return {"code": 0, "data": existing.to_dict(), "message": "任务已存在"} # 检查同一工作区是否有运行中的任务 active = GenerationTask.query.filter_by( workspace_id=workspace_id, ).filter(GenerationTask.status.in_(["queued", "running"])).first() if active: return {"code": 1001, "message": "该工作区有正在执行的任务，请等待完成", "data": None} task = GenerationTask( id=uuid.uuid4().hex, user_id=user_id, artifact_type=artifact_type, operation=operation, workspace_id=workspace_id, title_snapshot=title, input_snapshot_json=json.dumps(input_snapshot, ensure_ascii=False) if input_snapshot else None, idempotency_key=idempotency_key, ) db.session.add(task) db.session.commit() # 提交到 Celery。投递失败时必须结束数据库任务，不能留下永久 queued。 try: _dispatch_to_celery(task) except Exception as exc: message = f"任务提交失败: {exc}" logger.error("任务 %s 提交到 Celery 失败: %s", task.id, exc, exc_info=True) task.status = "failed" task.error_code = "dispatch_failed" task.error_message = message[:1000] task.finished_at = datetime.now() db.session.commit() _sync_failed_ppt_session(task, message) return {"code": 9999, "message": message, "data": task.to_dict()} return {"code": 0, "data": task.to_dict()} def _dispatch_to_celery(task): """根据任务类型分发到对应的 Celery 任务。""" from insurance.generation.celery_tasks import ( parse_ppt_task, generate_ppt_task, parse_poster_task, generate_poster_task, ) task_map = { ("ppt", "parse"): parse_ppt_task, ("ppt", "generate"): generate_ppt_task, ("poster", "parse"): parse_poster_task, ("poster", "generate"): generate_poster_task, } celery_task_fn = task_map.get((task.artifact_type, task.operation)) if not celery_task_fn: logger.error(f"未知任务类型: {task.artifact_type}/{task.operation}") task.status = "failed" task.error_code = "unknown_type" task.error_message = f"未知任务类型: {task.artifact_type}/{task.operation}" from insurance.db.compat import db db.session.commit() return result = celery_task_fn.apply_async(args=[task.id], queue="insurance") task.celery_task_id = result.id from insurance.db.compat import db db.session.commit() logger.info(f"任务 {task.id} 已提交到 Celery: {result.id}") def _sync_failed_ppt_session(task, message: str): """将 PPT 解析任务失败同步到工作区，避免页面永久停在 parsing。""" if task.artifact_type != "ppt" or task.operation != "parse": return from insurance.db.compat import db from insurance.models.ppt_session import PptSession session = PptSession.query.get(task.workspace_id) if not session or session.status != "parsing": return if session.latest_task_id and session.latest_task_id != task.id: return session.status = "error" session.parse_progress = 100 session.parse_message = "处理失败" session.parse_error = message[:1000] session.parse_finished_at = datetime.now() db.session.commit() def list_active_tasks(user_id: str, artifact_type: str = None) -> list: """查询用户活跃任务（任务坞用）。""" from insurance.models.generation_task import GenerationTask query = GenerationTask.query.filter_by(user_id=user_id) query = query.filter(GenerationTask.dock_hidden_at.is_(None)) if artifact_type: query = query.filter_by(artifact_type=artifact_type) # 只返回活跃和最近完成的任务 query = query.filter( GenerationTask.status.in_(["queued", "running", "done", "failed"]) ) query = query.order_by(GenerationTask.created_at.desc()) tasks = query.limit(20).all() return [t.to_dict() for t in tasks] def list_tasks(user_id: str, artifact_type: str = None, status: str = None, page: int = 1, page_size: int = 20) -> dict: """查询任务列表（任务中心用）。""" from insurance.models.generation_task import GenerationTask query = GenerationTask.query.filter_by(user_id=user_id) if artifact_type: query = query.filter_by(artifact_type=artifact_type) if status: query = query.filter_by(status=status) query = query.order_by(GenerationTask.created_at.desc()) total = query.count() items = query.offset((page - 1) * page_size).limit(page_size).all() return { "total": total, "items": [t.to_dict() for t in items], } def get_task(task_id: str, user_id: str) -> dict: """获取任务详情。""" from insurance.models.generation_task import GenerationTask task = GenerationTask.query.get(task_id) if not task or task.user_id != user_id: return {"code": 1002, "message": "任务不存在", "data": None} return {"code": 0, "data": task.to_dict()} def cancel_task(task_id: str, user_id: str) -> dict: """取消排队中的任务。""" from insurance.db.compat import db from insurance.models.generation_task import GenerationTask task = GenerationTask.query.get(task_id) if not task or task.user_id != user_id: return {"code": 1002, "message": "任务不存在", "data": None} if task.status != "queued": return {"code": 1001, "message": "只能取消排队中的任务", "data": None} task.status = "cancelled" task.finished_at = datetime.now() db.session.commit() return {"code": 0, "data": task.to_dict()} def hide_task_from_dock(task_id: str, user_id: str) -> dict: """从任务坞隐藏任务。""" from insurance.db.compat import db from insurance.models.generation_task import GenerationTask task = GenerationTask.query.get(task_id) if not task or task.user_id != user_id: return {"code": 1002, "message": "任务不存在", "data": None} task.dock_hidden_at = datetime.now() db.session.commit() return {"code": 0, "data": task.to_dict()} # ─── 过期任务恢复 ────────────────────────────────────────── STALE_TASK_TIMEOUT = 600 # 10 分钟无心跳视为过期 def recover_stale_tasks(): """启动时恢复过期任务：将长时间无心跳的 running 任务标记为 failed。 应在应用启动时调用。 """ from insurance.db.compat import db from insurance.models.generation_task import GenerationTask cutoff = datetime.now().timestamp() - STALE_TASK_TIMEOUT # 恢复无心跳的 running 任务 stale_running = GenerationTask.query.filter( GenerationTask.status == "running", GenerationTask.heartbeat_at < datetime.fromtimestamp(cutoff), ).all() for task in stale_running: task.status = "failed" task.error_code = "stale" task.error_message = "任务因服务重启而中断，请重新提交" task.finished_at = datetime.now() _sync_failed_ppt_session(task, task.error_message) logger.warning(f"恢复过期任务: {task.id} (workspace={task.workspace_id})") # 恢复长时间 queued 的任务（可能 Celery 未消费） stale_queued = GenerationTask.query.filter( GenerationTask.status == "queued", GenerationTask.created_at < datetime.fromtimestamp(cutoff), ).all() for task in stale_queued: task.status = "failed" task.error_code = "queue_timeout" task.error_message = "任务排队超时，请重新提交" task.finished_at = datetime.now() _sync_failed_ppt_session(task, task.error_message) logger.warning(f"恢复排队超时任务: {task.id}") if stale_running or stale_queued: db.session.commit() logger.info(f"已恢复 {len(stale_running)} 个运行过期任务, {len(stale_queued)} 个排队超时任务")