242 lines
7.7 KiB
Python
242 lines
7.7 KiB
Python
"""海报后台任务管理。
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使用与 PPT parse_worker 相同的后台线程 + Redis 锁模式。
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任务状态通过数据库字段追踪，前端轮询获取进度。
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"""
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import json
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import logging
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import threading
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import os
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from datetime import datetime
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from insurance.db.compat import db
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logger = logging.getLogger(__name__)
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_local_locks: set = set()
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_local_locks_guard = threading.Lock()
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_redis_locks: set = set()
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# 超过此时间仍为 queued/generating 的任务视为过期（秒）
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STALE_TASK_TIMEOUT = 600 # 10 分钟
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def recover_stale_tasks():
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"""启动时恢复过期任务：将长时间 queued/generating 的任务标记为 failed。
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应在应用启动时调用。
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"""
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from insurance.models.poster_record import PosterRecord
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from insurance.models.poster_case_upload import PosterCaseUpload
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cutoff = datetime.now().timestamp() - STALE_TASK_TIMEOUT
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# 恢复过期的海报生成任务
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stale_records = PosterRecord.query.filter(
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PosterRecord.task_status.in_(["queued", "generating"]),
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PosterRecord.created_at < datetime.fromtimestamp(cutoff),
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).all()
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for record in stale_records:
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record.task_status = "failed"
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record.task_error = "任务因服务重启而中断，请重新生成"
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record.finished_at = datetime.now()
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logger.warning(f"恢复过期海报任务: record_id={record.id}")
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# 恢复过期的计划书解析任务
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stale_cases = PosterCaseUpload.query.filter(
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PosterCaseUpload.parse_status.in_(["queued", "parsing"]),
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PosterCaseUpload.created_at < datetime.fromtimestamp(cutoff),
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).all()
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for case in stale_cases:
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case.parse_status = "failed"
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logger.warning(f"恢复过期解析任务: case_id={case.id}")
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if stale_records or stale_cases:
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db.session.commit()
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logger.info(f"已恢复 {len(stale_records)} 个海报任务, {len(stale_cases)} 个解析任务")
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# ─── 计划书解析任务 ───────────────────────────────────────
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def start_case_parse_task(app, case_upload_id: int) -> bool:
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"""启动后台计划书解析任务，返回是否新启动。"""
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lock_key = f"poster_case_parse:{case_upload_id}"
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if not _acquire_lock(lock_key):
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return False
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thread = threading.Thread(
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target=_run_case_parse_task,
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args=(app, case_upload_id, lock_key),
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daemon=True,
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)
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thread.start()
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return True
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def _run_case_parse_task(app, case_upload_id: int, lock_key: str):
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with app.app_context():
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try:
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_execute_case_parse(case_upload_id)
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except Exception as exc:
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logger.error(f"计划书解析任务失败 [{case_upload_id}]: {exc}", exc_info=True)
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_mark_case_failed(case_upload_id, str(exc))
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finally:
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_release_lock(lock_key)
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db.session.remove()
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def _execute_case_parse(case_upload_id: int):
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from insurance.models.poster_case_upload import PosterCaseUpload
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record = PosterCaseUpload.query.get(case_upload_id)
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if not record:
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return
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filepath = record.source_file_url
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if not filepath or not os.path.exists(filepath):
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record.parse_status = "failed"
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db.session.commit()
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return
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record.parse_status = "parsing"
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db.session.commit()
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from insurance.ppt.extraction import ExtractionOrchestrator
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orchestrator = ExtractionOrchestrator(use_cache=False)
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import asyncio
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parsed = None
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# 优先使用完整解析（获取利益演示表）
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try:
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result = asyncio.run(orchestrator.extract_plan(filepath))
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if result.status != "error" and result.data:
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data = result.data
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parsed = _map_extract_plan_fields(data, result.plan_type, result.status)
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logger.info(f"使用 extract_plan 解析成功: case_id={case_upload_id}, type={result.plan_type}")
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except Exception as exc:
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logger.warning(f"extract_plan 失败，降级到 extract_for_poster: {exc}")
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# 降级：使用轻量解析
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if not parsed:
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try:
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parsed = asyncio.run(orchestrator.extract_for_poster(filepath))
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logger.info(f"使用 extract_for_poster 降级解析: case_id={case_upload_id}")
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except Exception as exc:
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logger.error(f"extract_for_poster 也失败: {exc}")
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record = PosterCaseUpload.query.get(case_upload_id)
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if record:
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record.parse_status = "failed"
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db.session.commit()
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return
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record = PosterCaseUpload.query.get(case_upload_id)
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if not record:
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return
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record.parsed_data = json.dumps(parsed, ensure_ascii=False)
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record.parse_status = "parsed"
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db.session.commit()
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def _map_extract_plan_fields(data: dict, plan_type: str, status: str) -> dict:
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"""将 extract_plan 的完整数据映射为海报前端所需字段结构。
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兼容多种可能的字段命名（LLM 输出不固定）。
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"""
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# 保额：尝试多个字段名
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sum_assured = (
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data.get("sum_insured")
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or data.get("basic_sum_insured")
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or data.get("sum_assured")
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or data.get("face_amount")
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or data.get("coverage_amount")
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)
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# 缴费年期
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premium_term = (
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data.get("premium_term")
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or data.get("payment_period")
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or data.get("paying_period")
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or data.get("premium_payment_term")
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)
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# 年缴保费
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annual_premium = (
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data.get("annual_premium")
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or data.get("premium_amount")
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or data.get("yearly_premium")
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)
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# 保障期限
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coverage_period = (
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data.get("coverage_period")
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or data.get("policy_term")
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or data.get("coverage_term")
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)
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# 利益演示表
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benefit_table = (
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data.get("benefit_illustration")
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or data.get("benefit_table")
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or data.get("cash_value_projection")
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or []
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)
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return {
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"age": data.get("age"),
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"gender": data.get("gender"),
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"currency": data.get("currency"),
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"sum_assured": sum_assured,
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"premium_term": premium_term,
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"annual_premium": annual_premium,
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"coverage_period": coverage_period,
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"key_benefits": data.get("key_benefits") or [],
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"benefit_table": benefit_table,
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"plan_type": plan_type,
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"extraction_status": status,
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}
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def _mark_case_failed(case_upload_id: int, error: str):
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from insurance.models.poster_case_upload import PosterCaseUpload
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record = PosterCaseUpload.query.get(case_upload_id)
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if not record:
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return
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record.parse_status = "failed"
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db.session.commit()
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# ─── 锁管理 ────────────────────────────────────────────────
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def _acquire_lock(key: str) -> bool:
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"""获取任务锁（优先 Redis，降级本地内存）。"""
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redis_key = f"poster_task_lock:{key}"
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try:
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from insurance.db.compat import redis_client
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if redis_client and redis_client.set(redis_key, "1", nx=True, ex=1800):
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_redis_locks.add(key)
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return True
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if redis_client:
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return False
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except Exception:
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pass
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with _local_locks_guard:
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if key in _local_locks:
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return False
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_local_locks.add(key)
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return True
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def _release_lock(key: str):
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"""释放任务锁。"""
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if key in _redis_locks:
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try:
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from insurance.db.compat import redis_client
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if redis_client:
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redis_client.delete(f"poster_task_lock:{key}")
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except Exception:
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pass
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_redis_locks.discard(key)
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with _local_locks_guard:
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_local_locks.discard(key)
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