添加定时任务触发逻辑

app/main.py

@@ -0,0 +1,75 @@
+"""爬虫服务入口：初始化数据库，注册定时任务并启动调度。
+
+运行（必须在项目根目录下以模块方式启动，否则包内 import 找不到 app）：
+    python -m app.main
+"""
+
+from __future__ import annotations
+
+from apscheduler.schedulers.blocking import BlockingScheduler
+
+from app.config import settings
+from app.core.database import close_db, init_db
+from app.core.logger import log
+from app.service.announcement_batch_service import save_announcements
+from app.spider.offerqingbaoju import fetch_offerqingbaoju
+from app.spider.offershow import fetch_offershow
+
+
+def crawl(source: str, fetcher, limit: int) -> None:
+    """采集任务：抓公告地址 → 多线程落库。异常不外抛，避免调度器丢任务。
+
+    Args:
+        source: 采集源名称，仅用于日志。
+        fetcher: 爬虫函数，签名 (limit: int) -> list[str]。
+        limit: 本次抓取条数上限。
+    """
+    log.info("[{}] 任务开始，limit={}", source, limit)
+    try:
+        urls = fetcher(limit)
+        if urls:
+            save_announcements(urls)
+    except Exception as exc:
+        log.error("[{}] 任务异常: {}", source, exc)
+    log.info("[{}] 任务结束", source)
+
+
+# 采集源：(名称, 爬虫函数, 抓取条数, 每天执行的时, 分)
+JOBS = [
+    ("offershow", fetch_offershow, 100, 0, 30),
+    ("offerqingbaoju", fetch_offerqingbaoju, 100, 2, 36),
+]
+
+
+def main() -> None:
+    """初始化数据源并启动定时任务，阻塞运行直到 Ctrl+C。"""
+    log.info("爬虫服务启动，环境={}", settings.env)
+    init_db()
+
+    scheduler = BlockingScheduler(timezone="Asia/Shanghai")
+    for source, fetcher, limit, hour, minute in JOBS:
+        scheduler.add_job(
+            crawl,
+            "cron",
+            hour=hour,
+            minute=minute,
+            args=(source, fetcher, limit),
+            id=source,
+            # 上一轮没跑完则本轮跳过，防止任务堆叠
+            max_instances=1,
+            coalesce=True,
+            # 错过触发时间 10 分钟内仍补跑，超过则跳过本次
+            misfire_grace_time=600,
+        )
+        log.info("[{}] 已注册，每天 {:02d}:{:02d} 执行", source, hour, minute)
+
+    try:
+        scheduler.start()
+    except (KeyboardInterrupt, SystemExit):
+        log.info("服务中断，正在退出")
+    finally:
+        close_db()
+
+
+if __name__ == "__main__":
+    main()