533 lines
18 KiB
Python
533 lines
18 KiB
Python
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#!/usr/bin/env python3
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from __future__ import annotations
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import argparse
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import json
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import os
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import sys
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import uuid
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from dataclasses import asdict
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from datetime import UTC, datetime
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from pathlib import Path
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from typing import Any
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from sqlalchemy import create_engine, text
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from sqlalchemy.engine import Connection
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from sqlalchemy.exc import SQLAlchemyError
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from sqlalchemy.orm import Session
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from sqlalchemy.pool import NullPool
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SERVER_DIR = Path(__file__).resolve().parents[1]
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SRC_DIR = SERVER_DIR / "src"
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if str(SRC_DIR) not in sys.path:
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sys.path.insert(0, str(SRC_DIR))
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from app.db.maintenance_database_target import ( # noqa: E402
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MaintenanceDatabaseTarget,
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MaintenanceDatabaseTargetError,
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validate_maintenance_database_target,
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)
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from app.db.migration_preflight import ( # noqa: E402
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MigrationPreflightError,
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validate_migration_state,
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)
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from app.services.expense_case_legacy_backfill import ( # noqa: E402
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DEFAULT_BATCH_SIZE,
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MAX_BATCH_SIZE,
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ExpenseCaseLegacyBackfillService,
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LegacyBackfillCursor,
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)
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REQUIRED_ALEMBIC_REVISION = "20260713_0002"
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EXIT_CONFIGURATION = 2
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EXIT_SAFETY = 3
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EXIT_LOCKED = 4
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EXIT_CONFLICT = 5
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EXIT_RUNTIME = 6
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class BackfillCommandError(RuntimeError):
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def __init__(
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self,
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message: str,
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*,
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exit_code: int,
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code: str,
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details: dict[str, Any] | None = None,
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) -> None:
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super().__init__(message)
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self.exit_code = exit_code
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self.code = code
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self.details = details
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def parse_created_before(value: str) -> datetime:
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normalized = str(value or "").strip()
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if normalized.endswith("Z"):
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normalized = f"{normalized[:-1]}+00:00"
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try:
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parsed = datetime.fromisoformat(normalized)
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except ValueError as exc:
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raise argparse.ArgumentTypeError(
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"--created-before 必须是带时区的 ISO 8601 时间，例如 2026-07-14T00:00:00Z"
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) from exc
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if parsed.tzinfo is None or parsed.utcoffset() is None:
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raise argparse.ArgumentTypeError("--created-before 必须显式包含时区")
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return parsed.astimezone(UTC)
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def positive_int(value: str) -> int:
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try:
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parsed = int(value)
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except ValueError as exc:
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raise argparse.ArgumentTypeError("必须是正整数") from exc
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if parsed < 1:
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raise argparse.ArgumentTypeError("必须是正整数")
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return parsed
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def non_empty_text(value: str) -> str:
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normalized = str(value or "").strip()
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if not normalized:
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raise argparse.ArgumentTypeError("不能为空")
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return normalized
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def batch_size(value: str) -> int:
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parsed = positive_int(value)
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if parsed > MAX_BATCH_SIZE:
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raise argparse.ArgumentTypeError(f"不能超过 {MAX_BATCH_SIZE}")
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return parsed
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def build_parser() -> argparse.ArgumentParser:
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parser = argparse.ArgumentParser(
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description="把迁移前 ExpenseClaim 诚实地接入统一费用事件；默认只预览。",
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)
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mode = parser.add_mutually_exclusive_group()
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mode.add_argument("--dry-run", action="store_true", help="只读预览（默认）。")
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mode.add_argument("--apply", action="store_true", help="按批写入历史快照事件。")
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parser.add_argument(
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"--tenant-id",
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required=True,
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type=non_empty_text,
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help="旧单明确归属的租户 ID。",
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)
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parser.add_argument(
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"--created-before",
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required=True,
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type=parse_created_before,
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help="仅处理该时刻之前创建的单据，必须包含时区。",
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)
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parser.add_argument("--batch-size", type=batch_size, default=DEFAULT_BATCH_SIZE)
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parser.add_argument(
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"--max-claims",
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type=positive_int,
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help="最多扫描的历史单据数，用于 canary。",
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)
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parser.add_argument("--sample-limit", type=positive_int, default=20)
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parser.add_argument("--expected-host", required=True)
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parser.add_argument("--expected-database", required=True)
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parser.add_argument(
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"--confirm-target",
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help="apply 时必须精确等于解析后的 host:port/database。",
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)
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parser.add_argument(
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"--allow-non-disposable-target",
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action="store_true",
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help="允许在非 probe 数据库 apply；仍需精确确认目标。",
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)
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return parser
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def _cursor_payload(cursor: LegacyBackfillCursor | None) -> dict[str, str] | None:
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if cursor is None:
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return None
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return {
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"created_at": cursor.created_at.astimezone(UTC).isoformat().replace("+00:00", "Z"),
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"claim_id": cursor.claim_id,
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}
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def _item_payload(item: Any) -> dict[str, str]:
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payload = asdict(item)
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payload["disposition"] = item.disposition.value
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return payload
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def _base_summary(
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*,
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mode: str,
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target: MaintenanceDatabaseTarget,
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tenant_id: str,
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created_before: datetime,
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revision: str,
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) -> dict[str, Any]:
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return {
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"mode": mode,
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"database": {
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"target": target.exact_target,
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"url": target.sanitized_url,
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"disposable": target.is_disposable,
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"revision": revision,
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},
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"tenant_id": tenant_id,
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"created_before": created_before.isoformat().replace("+00:00", "Z"),
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"inspected": 0,
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"eligible": 0,
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"already_linked": 0,
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"conflicts": 0,
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"created": 0,
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"batches": 0,
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"limited": False,
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"last_cursor": None,
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"samples": [],
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}
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def _page_limit(*, configured: int, remaining: int | None) -> int:
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return configured if remaining is None else min(configured, remaining)
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def _execution_progress(summary: dict[str, Any], **extra: Any) -> dict[str, Any]:
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progress = {
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"run_id": summary.get("run_id"),
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"partial_commit": bool(summary.get("batches")),
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"committed_batches": int(summary.get("batches") or 0),
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"committed_claims": int(summary.get("inspected") or 0),
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"created": int(summary.get("created") or 0),
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"already_linked": int(summary.get("already_linked") or 0),
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"last_committed_cursor": summary.get("last_cursor"),
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}
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progress.update(extra)
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return progress
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def _preview(
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session: Session,
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*,
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tenant_id: str,
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created_before: datetime,
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configured_batch_size: int,
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max_claims: int | None,
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sample_limit: int,
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summary: dict[str, Any],
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) -> None:
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service = ExpenseCaseLegacyBackfillService(
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session,
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tenant_id=tenant_id,
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cutoff=created_before,
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)
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cursor: LegacyBackfillCursor | None = None
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remaining = max_claims
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while remaining is None or remaining > 0:
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page = service.preview(
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batch_size=_page_limit(configured=configured_batch_size, remaining=remaining),
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after=cursor,
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)
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if not page.items:
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break
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summary["batches"] += 1
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summary["inspected"] += page.inspected
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summary["eligible"] += page.eligible
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summary["already_linked"] += page.linked
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summary["conflicts"] += page.conflicts
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available_samples = max(0, sample_limit - len(summary["samples"]))
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summary["samples"].extend(_item_payload(item) for item in page.items[:available_samples])
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cursor = page.next_cursor
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summary["last_cursor"] = _cursor_payload(cursor)
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if remaining is not None:
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remaining -= page.inspected
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if not page.has_more:
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break
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summary["limited"] = bool(remaining == 0 and page.has_more) if "page" in locals() else False
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def _acquire_advisory_lock(connection: Connection, tenant_id: str) -> str:
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lock_name = f"legacy-expense-case-backfill:{tenant_id}"
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acquired = connection.scalar(
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text("SELECT pg_try_advisory_lock(hashtextextended(:lock_name, 0))"),
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{"lock_name": lock_name},
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)
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connection.commit()
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if not acquired:
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raise BackfillCommandError(
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"同一租户已有历史费用事件回填任务正在运行。",
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exit_code=EXIT_LOCKED,
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code="advisory_lock_unavailable",
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)
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return lock_name
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def _release_advisory_lock(connection: Connection, lock_name: str) -> None:
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if connection.in_transaction():
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connection.rollback()
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connection.execute(
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text("SELECT pg_advisory_unlock(hashtextextended(:lock_name, 0))"),
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{"lock_name": lock_name},
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)
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connection.commit()
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def _apply(
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connection: Connection,
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*,
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tenant_id: str,
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created_before: datetime,
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configured_batch_size: int,
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max_claims: int | None,
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sample_limit: int,
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summary: dict[str, Any],
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) -> None:
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lock_name = _acquire_advisory_lock(connection, tenant_id)
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run_id = f"historical-import-{uuid.uuid4().hex}"
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backfilled_at = datetime.now(UTC)
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summary["run_id"] = run_id
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summary["backfilled_at"] = backfilled_at.isoformat().replace("+00:00", "Z")
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cursor: LegacyBackfillCursor | None = None
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remaining = max_claims
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try:
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with Session(bind=connection, autoflush=False, expire_on_commit=False) as session:
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service = ExpenseCaseLegacyBackfillService(
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session,
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tenant_id=tenant_id,
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cutoff=created_before,
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)
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while remaining is None or remaining > 0:
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session.execute(text("SET LOCAL lock_timeout = '5s'"))
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result = service.apply_batch(
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run_id=run_id,
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batch_size=_page_limit(
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configured=configured_batch_size,
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remaining=remaining,
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),
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after=cursor,
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backfilled_at=backfilled_at,
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)
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if not result.items:
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session.rollback()
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break
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if result.conflicts:
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session.rollback()
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conflict_ids = [
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item.claim_id
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for item in result.items
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if item.disposition.value == "conflict"
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]
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raise BackfillCommandError(
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f"检测到 {result.conflicts} 个数据冲突，当前批次已回滚："
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f"{', '.join(conflict_ids)}",
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exit_code=EXIT_CONFLICT,
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code="legacy_claim_conflict",
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details=_execution_progress(
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summary,
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current_batch_conflict_ids=conflict_ids,
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),
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)
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session.commit()
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summary["batches"] += 1
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summary["inspected"] += result.inspected
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summary["created"] += result.created
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summary["already_linked"] += result.skipped_linked
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available_samples = max(0, sample_limit - len(summary["samples"]))
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summary["samples"].extend(
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_item_payload(item) for item in result.items[:available_samples]
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)
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cursor = result.next_cursor
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summary["last_cursor"] = _cursor_payload(cursor)
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if remaining is not None:
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remaining -= result.inspected
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if not result.has_more:
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break
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summary["limited"] = bool(remaining == 0 and "result" in locals() and result.has_more)
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finally:
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_release_advisory_lock(connection, lock_name)
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def _verify_connected_database(
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connection: Connection,
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*,
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expected_database: str,
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) -> tuple[str, str]:
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database_name, database_user = connection.execute(
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|
|
text("SELECT current_database(), current_user")
|
|||
|
|
).one()
|
|||
|
|
if str(database_name) != expected_database:
|
|||
|
|
raise BackfillCommandError(
|
|||
|
|
"连接后的 current_database() 与 DATABASE_URL 不一致。",
|
|||
|
|
exit_code=EXIT_SAFETY,
|
|||
|
|
code="connected_database_mismatch",
|
|||
|
|
)
|
|||
|
|
return str(database_name), str(database_user)
|
|||
|
|
|
|||
|
|
|
|||
|
|
def run(args: argparse.Namespace) -> dict[str, Any]:
|
|||
|
|
database_url = os.environ.get("DATABASE_URL", "")
|
|||
|
|
if args.apply and str(args.confirm_target or "").strip() == "":
|
|||
|
|
raise BackfillCommandError(
|
|||
|
|
"--apply 必须提供 --confirm-target 精确确认数据库目标。",
|
|||
|
|
exit_code=EXIT_SAFETY,
|
|||
|
|
code="confirm_target_required",
|
|||
|
|
)
|
|||
|
|
target = validate_maintenance_database_target(
|
|||
|
|
database_url,
|
|||
|
|
expected_host=args.expected_host,
|
|||
|
|
expected_database=args.expected_database,
|
|||
|
|
apply=args.apply,
|
|||
|
|
allow_non_disposable=args.allow_non_disposable_target,
|
|||
|
|
confirm_target=args.confirm_target,
|
|||
|
|
)
|
|||
|
|
engine = create_engine(
|
|||
|
|
database_url,
|
|||
|
|
pool_pre_ping=True,
|
|||
|
|
poolclass=NullPool,
|
|||
|
|
)
|
|||
|
|
try:
|
|||
|
|
with engine.connect() as connection:
|
|||
|
|
connected_database, connected_user = _verify_connected_database(
|
|||
|
|
connection,
|
|||
|
|
expected_database=target.database,
|
|||
|
|
)
|
|||
|
|
state = validate_migration_state(connection)
|
|||
|
|
if state.revision != REQUIRED_ALEMBIC_REVISION:
|
|||
|
|
raise BackfillCommandError(
|
|||
|
|
"数据库必须先升级到费用事件迁移 head："
|
|||
|
|
f"actual={state.revision or 'unversioned/base'}; "
|
|||
|
|
f"required={REQUIRED_ALEMBIC_REVISION}",
|
|||
|
|
exit_code=EXIT_SAFETY,
|
|||
|
|
code="migration_revision_mismatch",
|
|||
|
|
)
|
|||
|
|
connection.rollback()
|
|||
|
|
|
|||
|
|
summary = _base_summary(
|
|||
|
|
mode="apply" if args.apply else "dry-run",
|
|||
|
|
target=target,
|
|||
|
|
tenant_id=args.tenant_id,
|
|||
|
|
created_before=args.created_before,
|
|||
|
|
revision=state.revision,
|
|||
|
|
)
|
|||
|
|
summary["database"]["connected_database"] = connected_database
|
|||
|
|
summary["database"]["connected_user"] = connected_user
|
|||
|
|
|
|||
|
|
with Session(bind=connection, autoflush=False) as preview_session:
|
|||
|
|
_preview(
|
|||
|
|
preview_session,
|
|||
|
|
tenant_id=args.tenant_id,
|
|||
|
|
created_before=args.created_before,
|
|||
|
|
configured_batch_size=args.batch_size,
|
|||
|
|
max_claims=args.max_claims,
|
|||
|
|
sample_limit=args.sample_limit,
|
|||
|
|
summary=summary,
|
|||
|
|
)
|
|||
|
|
preview_session.rollback()
|
|||
|
|
|
|||
|
|
if not args.apply:
|
|||
|
|
summary["would_create_cases"] = summary["eligible"]
|
|||
|
|
summary["would_create_links"] = summary["eligible"]
|
|||
|
|
summary["would_create_events"] = summary["eligible"]
|
|||
|
|
return summary
|
|||
|
|
if summary["conflicts"]:
|
|||
|
|
raise BackfillCommandError(
|
|||
|
|
f"预览发现 {summary['conflicts']} 个数据冲突；未执行任何写入。",
|
|||
|
|
exit_code=EXIT_CONFLICT,
|
|||
|
|
code="legacy_claim_conflict",
|
|||
|
|
)
|
|||
|
|
|
|||
|
|
preview = {
|
|||
|
|
"inspected": summary["inspected"],
|
|||
|
|
"eligible": summary["eligible"],
|
|||
|
|
"already_linked": summary["already_linked"],
|
|||
|
|
"samples": summary["samples"],
|
|||
|
|
}
|
|||
|
|
summary.update(
|
|||
|
|
inspected=0,
|
|||
|
|
eligible=preview["eligible"],
|
|||
|
|
already_linked=0,
|
|||
|
|
conflicts=0,
|
|||
|
|
created=0,
|
|||
|
|
batches=0,
|
|||
|
|
limited=False,
|
|||
|
|
last_cursor=None,
|
|||
|
|
samples=[],
|
|||
|
|
preview=preview,
|
|||
|
|
)
|
|||
|
|
try:
|
|||
|
|
_apply(
|
|||
|
|
connection,
|
|||
|
|
tenant_id=args.tenant_id,
|
|||
|
|
created_before=args.created_before,
|
|||
|
|
configured_batch_size=args.batch_size,
|
|||
|
|
max_claims=args.max_claims,
|
|||
|
|
sample_limit=args.sample_limit,
|
|||
|
|
summary=summary,
|
|||
|
|
)
|
|||
|
|
except BackfillCommandError:
|
|||
|
|
raise
|
|||
|
|
except SQLAlchemyError as exc:
|
|||
|
|
raise BackfillCommandError(
|
|||
|
|
"数据库执行失败；已提交批次不会回滚，请依据进度摘要安全重跑。",
|
|||
|
|
exit_code=EXIT_RUNTIME,
|
|||
|
|
code="database_runtime_error",
|
|||
|
|
details=_execution_progress(summary),
|
|||
|
|
) from exc
|
|||
|
|
return summary
|
|||
|
|
finally:
|
|||
|
|
engine.dispose()
|
|||
|
|
|
|||
|
|
|
|||
|
|
def _error_payload(
|
|||
|
|
exc: Exception,
|
|||
|
|
*,
|
|||
|
|
code: str,
|
|||
|
|
details: dict[str, Any] | None = None,
|
|||
|
|
) -> dict[str, Any]:
|
|||
|
|
payload: dict[str, Any] = {"status": "error", "code": code, "message": str(exc)}
|
|||
|
|
if details is not None:
|
|||
|
|
payload["details"] = details
|
|||
|
|
return payload
|
|||
|
|
|
|||
|
|
|
|||
|
|
def main(argv: list[str] | None = None) -> int:
|
|||
|
|
args = build_parser().parse_args(argv)
|
|||
|
|
try:
|
|||
|
|
payload = run(args)
|
|||
|
|
except BackfillCommandError as exc:
|
|||
|
|
print(
|
|||
|
|
json.dumps(
|
|||
|
|
_error_payload(exc, code=exc.code, details=exc.details),
|
|||
|
|
ensure_ascii=False,
|
|||
|
|
),
|
|||
|
|
file=sys.stderr,
|
|||
|
|
)
|
|||
|
|
return exc.exit_code
|
|||
|
|
except MaintenanceDatabaseTargetError as exc:
|
|||
|
|
print(
|
|||
|
|
json.dumps(_error_payload(exc, code=exc.code), ensure_ascii=False),
|
|||
|
|
file=sys.stderr,
|
|||
|
|
)
|
|||
|
|
return EXIT_SAFETY
|
|||
|
|
except MigrationPreflightError as exc:
|
|||
|
|
print(
|
|||
|
|
json.dumps(_error_payload(exc, code="migration_preflight_failed"), ensure_ascii=False),
|
|||
|
|
file=sys.stderr,
|
|||
|
|
)
|
|||
|
|
return EXIT_SAFETY
|
|||
|
|
except (SQLAlchemyError, OSError) as exc:
|
|||
|
|
print(
|
|||
|
|
json.dumps(_error_payload(exc, code="database_runtime_error"), ensure_ascii=False),
|
|||
|
|
file=sys.stderr,
|
|||
|
|
)
|
|||
|
|
return EXIT_RUNTIME
|
|||
|
|
|
|||
|
|
print(json.dumps(payload, ensure_ascii=False, indent=2, default=str))
|
|||
|
|
return 0
|
|||
|
|
|
|||
|
|
|
|||
|
|
if __name__ == "__main__":
|
|||
|
|
raise SystemExit(main())
|