409 lines
15 KiB
Python
409 lines
15 KiB
Python
from __future__ import annotations
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import json
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import threading
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from collections import defaultdict
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from dataclasses import dataclass
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from datetime import date, datetime, timedelta
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from typing import Any
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from fastapi import HTTPException
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from app import state
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from app.config import CACHE_DIR, AutoSchedulerConfig, RemoteDataConfig
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from app.services.remote_download import RemoteDataDownloader, RemoteFileInfo
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from app.utils.file_dates import extract_file_date, required_week_days
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READY_DIR = CACHE_DIR / "auto_scheduler"
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READY_FLAG = READY_DIR / "ready.flag"
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DISABLED_CHECK_SECONDS = 60
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STARTUP_CHECK_SECONDS = 5
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FAILURE_RESULTS = {"scan_failed", "trigger_failed", "source_cleanup_failed", "failed", "invalid_flag"}
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@dataclass(frozen=True)
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class DirectoryReadyStatus:
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directory: str
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ready: bool
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found_days: list[date]
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missing_days: list[date]
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file_count: int
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error: str | None = None
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def to_dict(self) -> dict[str, Any]:
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return {
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"ready": self.ready,
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"found_days": [item.isoformat() for item in self.found_days],
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"missing_days": [item.isoformat() for item in self.missing_days],
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"found_count": len(self.found_days),
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"required_count": len(self.found_days) + len(self.missing_days),
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"file_count": self.file_count,
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"error": self.error,
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}
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class AutoScheduler:
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def __init__(self) -> None:
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self._stop_event = threading.Event()
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self._check_lock = threading.Lock()
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self._status_lock = threading.Lock()
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self._thread: threading.Thread | None = None
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self._running = False
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self._last_check_at: datetime | None = None
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self._next_check_at: datetime | None = None
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self._last_result = "not_started"
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self._last_message = "自动调度器尚未检查"
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self._directory_status: dict[str, dict[str, Any]] = {}
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self._task_running = False
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self._task_id: str | None = None
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self._failure_count = 0
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def start(self) -> None:
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if self._thread and self._thread.is_alive():
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return
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self._running = True
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self._stop_event.clear()
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self._set_next_check(datetime.now() + timedelta(seconds=STARTUP_CHECK_SECONDS))
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self._thread = threading.Thread(target=self._run_loop, name="auto-scheduler", daemon=True)
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self._thread.start()
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def stop(self) -> None:
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self._running = False
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self._stop_event.set()
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if self._thread and self._thread.is_alive():
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self._thread.join(timeout=5)
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def get_status(self) -> dict[str, Any]:
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config = state.current_config().remote_data.normalized()
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scheduler = config.auto_scheduler.normalized()
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target_days = required_week_days(scheduler.week_offset)
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ready_flag = self._read_ready_flag()
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with self._status_lock:
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return {
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"enabled": scheduler.enabled,
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"running": self._running,
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"check_interval_hours": scheduler.check_interval_hours,
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"expected_directories": scheduler.expected_directories,
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"week_offset": scheduler.week_offset,
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"auto_delete_source": config.auto_delete_source,
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"next_check_at": self._format_dt(self._next_check_at),
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"last_check_at": self._format_dt(self._last_check_at),
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"last_result": self._last_result,
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"last_message": self._last_message,
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"failure_count": self._failure_count,
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"task_running": self._task_running,
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"task_id": self._task_id,
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"ready_flag": ready_flag,
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"target_week": {
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"start": target_days[0].isoformat(),
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"end": target_days[-1].isoformat(),
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"days": [item.isoformat() for item in target_days],
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},
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"directory_status": self._directory_status,
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}
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def check_and_run(self, manual: bool = False) -> dict[str, Any]:
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if not self._check_lock.acquire(blocking=False):
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return self._finish_check("busy", "自动调度器正在检查中", manual)
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try:
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return self._check_and_run_locked(manual)
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finally:
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self._check_lock.release()
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def _run_loop(self) -> None:
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while not self._stop_event.wait(self._seconds_until_next_check()):
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self.check_and_run(manual=False)
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def _check_and_run_locked(self, manual: bool) -> dict[str, Any]:
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now = datetime.now()
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remote_config = state.current_config().remote_data.normalized()
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scheduler = remote_config.auto_scheduler.normalized()
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self._last_check_at = now
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if not scheduler.enabled:
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self._set_next_check(now + timedelta(seconds=DISABLED_CHECK_SECONDS))
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return self._finish_check("disabled", "自动调度未启用", manual)
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self._set_next_check(now + timedelta(hours=scheduler.check_interval_hours))
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if not remote_config.enabled:
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return self._finish_check("remote_disabled", "远程数据源未启用", manual)
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if state.global_task_lock["locked"]:
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return self._finish_check("task_running", "已有任务在运行，本轮自动调度跳过", manual)
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ready_flag = self._read_ready_flag()
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if ready_flag["exists"]:
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if ready_flag.get("invalid"):
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self._clear_ready_flag()
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return self._finish_check("invalid_flag", "就绪标识格式错误，已清除，本轮不触发处理", manual)
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target_dates = self._target_dates_from_flag(ready_flag, scheduler)
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return self._trigger_processing(target_dates, ready_flag, manual)
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target_days = required_week_days(scheduler.week_offset)
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directory_status = self._check_remote_ready(remote_config, scheduler, target_days)
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ready = bool(directory_status) and all(item.ready for item in directory_status.values())
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self._set_directory_status(directory_status)
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error_count = sum(1 for item in directory_status.values() if item.error)
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if error_count:
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return self._finish_check(
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"scan_failed",
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f"远程目录扫描失败，{error_count}/{len(directory_status)} 个目录无法访问或扫描失败",
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manual,
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)
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if ready:
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self._mark_ready(target_days, directory_status)
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return self._finish_check(
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"marked_ready",
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"远程数据已满足目标周 7 天，已写入就绪标识，下次检查将自动处理",
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manual,
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)
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ready_count = sum(1 for item in directory_status.values() if item.ready)
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return self._finish_check(
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"waiting",
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f"远程数据未就绪，{ready_count}/{len(directory_status)} 个目录满足目标周 7 天",
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manual,
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)
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def _check_remote_ready(
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self,
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remote_config: RemoteDataConfig,
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scheduler: AutoSchedulerConfig,
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target_days: list[date],
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) -> dict[str, DirectoryReadyStatus]:
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downloader = RemoteDataDownloader(remote_config)
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expected_directories = scheduler.expected_directories
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if expected_directories:
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return {
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directory: self._directory_ready_status(
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directory,
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self._safe_list_remote_zip_files(downloader, directory),
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target_days,
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)
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for directory in expected_directories
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}
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files = self._safe_list_remote_zip_files(downloader, None)
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if files is None:
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return {
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".": DirectoryReadyStatus(
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directory=".",
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ready=False,
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found_days=[],
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missing_days=target_days,
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file_count=0,
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error="远程目录扫描失败",
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)
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}
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grouped: dict[str, list[RemoteFileInfo]] = defaultdict(list)
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for remote_file in files:
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grouped[remote_file.parent or "."].append(remote_file)
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if not grouped:
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return {
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".": DirectoryReadyStatus(
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directory=".",
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ready=False,
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found_days=[],
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missing_days=target_days,
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file_count=0,
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error="远程目录未找到 ZIP 文件",
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)
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}
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return {
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directory: self._directory_ready_status(directory, directory_files, target_days)
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for directory, directory_files in sorted(grouped.items(), key=lambda item: item[0])
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}
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def _safe_list_remote_zip_files(
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self,
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downloader: RemoteDataDownloader,
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directory: str | None,
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) -> list[RemoteFileInfo] | None:
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try:
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return downloader.list_remote_zip_files(directory)
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except Exception:
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return None
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def _directory_ready_status(
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self,
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directory: str,
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files: list[RemoteFileInfo] | None,
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target_days: list[date],
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) -> DirectoryReadyStatus:
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if files is None:
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return DirectoryReadyStatus(
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directory=directory,
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ready=False,
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found_days=[],
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missing_days=target_days,
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file_count=0,
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error="远程目录不存在或无法访问",
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)
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required = set(target_days)
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found = {
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file_date
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for remote_file in files
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if (file_date := extract_file_date(remote_file.name)) in required
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}
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missing = [item for item in target_days if item not in found]
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return DirectoryReadyStatus(
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directory=directory,
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ready=not missing,
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found_days=sorted(found),
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missing_days=missing,
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file_count=len(files),
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)
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def _trigger_processing(
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self,
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target_dates: list[date],
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ready_flag: dict[str, Any],
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manual: bool,
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) -> dict[str, Any]:
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from app.api.routers.remote import start_remote_processing_job
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try:
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result = start_remote_processing_job(
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source="scheduler",
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on_finish=self._on_processing_finish,
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target_dates=target_dates,
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)
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except HTTPException as exc:
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return self._finish_check("trigger_failed", str(exc.detail), manual)
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except Exception as exc:
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return self._finish_check("trigger_failed", f"自动调度触发失败: {exc}", manual)
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task_id = result.get("task_id")
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with self._status_lock:
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self._task_running = True
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self._task_id = str(task_id) if task_id else None
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self._last_result = "triggered"
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self._last_message = "已根据就绪标识触发远程下载并处理"
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return {
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"success": True,
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"result": "triggered",
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"message": "已根据就绪标识触发远程下载并处理",
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"task_id": task_id,
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"ready_flag": ready_flag,
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"status": self.get_status(),
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}
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def _mark_ready(
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self,
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target_days: list[date],
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directory_status: dict[str, DirectoryReadyStatus],
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) -> None:
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READY_DIR.mkdir(parents=True, exist_ok=True)
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payload = {
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"ready_at": datetime.now().isoformat(timespec="seconds"),
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"week_start": target_days[0].isoformat(),
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"week_end": target_days[-1].isoformat(),
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"target_dates": [item.isoformat() for item in target_days],
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"directories": {
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name: item.to_dict()
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for name, item in directory_status.items()
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},
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}
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READY_FLAG.write_text(json.dumps(payload, ensure_ascii=False, indent=2), encoding="utf-8")
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def _clear_ready_flag(self) -> None:
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try:
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READY_FLAG.unlink(missing_ok=True)
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except OSError:
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pass
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def _read_ready_flag(self) -> dict[str, Any]:
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if not READY_FLAG.exists():
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return {"exists": False}
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try:
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data = json.loads(READY_FLAG.read_text(encoding="utf-8"))
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if isinstance(data, dict):
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return {"exists": True, **data}
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except Exception as exc:
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return {"exists": True, "invalid": True, "error": str(exc)}
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return {"exists": True, "invalid": True, "error": "ready.flag 格式错误"}
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def _target_dates_from_flag(
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self,
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ready_flag: dict[str, Any],
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scheduler: AutoSchedulerConfig,
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) -> list[date]:
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raw_dates = ready_flag.get("target_dates")
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if isinstance(raw_dates, list):
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dates: list[date] = []
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for raw_date in raw_dates:
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try:
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dates.append(date.fromisoformat(str(raw_date)))
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except ValueError:
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continue
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if dates:
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return sorted(dates)
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return required_week_days(scheduler.week_offset)
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def _on_processing_finish(self, task_id: str, status: str) -> None:
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if status == "completed":
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self._clear_ready_flag()
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message = "自动调度任务处理成功，已清除就绪标识"
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result = "completed"
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else:
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message = "自动调度任务未完成，就绪标识已保留，下次检查会重试"
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result = status or "failed"
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with self._status_lock:
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self._task_running = False
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self._task_id = task_id
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self._last_result = result
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self._last_message = message
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self._failure_count = 0 if result == "completed" else self._failure_count + 1
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def _finish_check(self, result: str, message: str, manual: bool) -> dict[str, Any]:
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with self._status_lock:
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self._last_result = result
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self._last_message = message
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if result in FAILURE_RESULTS:
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self._failure_count += 1
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elif result not in {"busy", "task_running"}:
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self._failure_count = 0
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if result not in {"triggered", "task_running"}:
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self._task_running = False
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return {
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"success": result not in FAILURE_RESULTS,
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"manual": manual,
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"result": result,
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"message": message,
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"status": self.get_status(),
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}
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def _set_directory_status(self, directory_status: dict[str, DirectoryReadyStatus]) -> None:
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with self._status_lock:
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self._directory_status = {
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name: item.to_dict()
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for name, item in directory_status.items()
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}
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def _set_next_check(self, value: datetime) -> None:
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with self._status_lock:
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self._next_check_at = value
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def _seconds_until_next_check(self) -> float:
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with self._status_lock:
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next_check_at = self._next_check_at
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if not next_check_at:
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return STARTUP_CHECK_SECONDS
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return max((next_check_at - datetime.now()).total_seconds(), 0)
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@staticmethod
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def _format_dt(value: datetime | None) -> str | None:
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return value.isoformat(timespec="seconds") if value else None
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