205 lines
8.7 KiB
Python
205 lines
8.7 KiB
Python
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# ============================================================
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# Mock WMS 缺料/库存事件源（moduleId: integ-wms-stub, 可重生 ✅）
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# round-38 方向 N：缺料 → 重排端到端闭环 Mock
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# 与 mes_stub 同构：读/写本地镜像（库存台账 + 缺料事件流）；
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# emit_shortage 幂等生成缺料事件（eventId + 乱序容忍 offset/seq）；
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# replay 按事件流重放；库存版本号单调递增（monotonic）。
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# ============================================================
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from __future__ import annotations
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import json
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from datetime import datetime
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from pathlib import Path
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from typing import Any
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_MIRROR_PATH = Path(__file__).resolve().parents[1] / "data" / "wms_mirror.json"
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def default_mirror() -> dict[str, Any]:
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return {
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"system": "WMS-MOCK",
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"plant": "CNWH",
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"updatedAt": datetime.now().strftime("%Y-%m-%d %H:%M"),
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"inventory": [], # 库存台账 [{materialCode,name,unit,stock,inTransit,safetyStock,version}]
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"shortageEvents": [], # 缺料/库存事件流 [{eventId,seq,offset,type,materialCode,...}]
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"idempotency": {}, # dedupKey -> eventId
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"inventoryVersion": 0, # 单调库存版本号
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}
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def _now_ts() -> str:
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return datetime.now().strftime("%Y-%m-%d %H:%M:%S")
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class MockWmsClient:
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"""进程内 Mock WMS：读写本地镜像，模拟缺料事件上报与重放。"""
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def __init__(self, path: Path | None = None):
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self.path = path or _MIRROR_PATH
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self.path.parent.mkdir(parents=True, exist_ok=True)
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if not self.path.exists():
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self._save(default_mirror())
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def _load(self) -> dict:
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try:
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return json.loads(self.path.read_text(encoding="utf-8"))
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except (OSError, json.JSONDecodeError):
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data = default_mirror()
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self._save(data)
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return data
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def _save(self, data: dict) -> None:
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data["updatedAt"] = datetime.now().strftime("%Y-%m-%d %H:%M")
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self.path.write_text(json.dumps(data, ensure_ascii=False, indent=2), encoding="utf-8")
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# ---------------- 只读：状态 / 台账 / 版本 ----------------
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def status(self) -> dict:
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m = self._load()
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return {
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"connected": True,
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"mode": "stub",
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"system": m.get("system"),
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"plant": m.get("plant"),
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"updatedAt": m.get("updatedAt"),
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"inventoryVersion": int(m.get("inventoryVersion") or 0),
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"inventoryCount": len(m.get("inventory") or []),
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"eventCount": len(m.get("shortageEvents") or []),
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"shortageCount": sum(1 for e in m.get("shortageEvents") or [] if e.get("type") == "SHORTAGE"),
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}
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def inventory_version(self) -> int:
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"""库存版本号（monotonic，随每次事件 +1）。"""
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return int(self._load().get("inventoryVersion") or 0)
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def ledger(self) -> list[dict]:
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"""库存台账快照（P0 只读）。"""
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return list(self._load().get("inventory") or [])
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# ---------------- 写：库存台账（初始同步/测试种子） ----------------
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def upsert_inventory(self, rows: list[dict[str, Any]]) -> list[dict]:
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"""写入/更新库存台账（幂等按 materialCode 合并）。返回当前台账。"""
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m = self._load()
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existing = {r.get("materialCode"): r for r in m.get("inventory", [])}
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for row in rows:
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code = row.get("materialCode")
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if not code:
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continue
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if code in existing:
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existing[code].update({k: v for k, v in row.items() if v is not None})
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else:
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m.setdefault("inventory", []).append(dict(row))
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self._save(m)
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return self.ledger()
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# ---------------- 写：缺料事件（幂等 eventId + 乱序容忍 offset/seq） ----------------
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def emit_shortage(self, material_code: str, *, new_stock: float,
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shortage_qty: float | None = None, occurred_at: str | None = None,
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idem_key: str | None = None,
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name: str | None = None, unit: str | None = None) -> dict:
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"""生成一条缺料事件并写镜像事件流。
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幂等：相同 idem_key（缺省 = materialCode + occurredAt）只生成一次，
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重复调用返回同一事件（duplicate=True）。
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乱序容忍：事件携带单调 seq（逻辑顺序）与 offset（到达顺序），
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消费端按 seq 应用、按 eventId 去重，不依赖到达顺序。
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"""
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m = self._load()
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key = idem_key or f"shortage:{material_code}:{occurred_at or ''}"
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seen = (m.get("idempotency") or {}).get(key)
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if seen:
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ev = next((e for e in m.get("shortageEvents", []) if e.get("eventId") == seen), None)
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if ev is not None:
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return {**ev, "duplicate": True}
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row = next((r for r in m.get("inventory", []) if r.get("materialCode") == material_code), None)
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seq = len(m.get("shortageEvents") or []) + 1
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event_id = f"WMS-EVT-{seq:04d}"
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new_version = int(m.get("inventoryVersion") or 0) + 1
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event = {
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"eventId": event_id,
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"seq": seq,
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"offset": len(m.get("shortageEvents") or []),
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"type": "SHORTAGE",
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"materialCode": material_code,
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"name": name or (row or {}).get("name"),
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"unit": unit or (row or {}).get("unit"),
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"oldStock": (float(row["stock"]) if row is not None and row.get("stock") is not None else None),
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"newStock": float(new_stock),
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"shortageQty": float(shortage_qty) if shortage_qty is not None else None,
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"occurredAt": occurred_at or _now_ts(),
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"dedupKey": key,
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"source": "WMS-MOCK",
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"wmsVersion": new_version,
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}
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m.setdefault("shortageEvents", []).append(event)
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m.setdefault("idempotency", {})[key] = event_id
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if row is None:
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m.setdefault("inventory", []).append({
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"materialCode": material_code, "name": name or material_code, "unit": unit or "",
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"stock": float(new_stock), "inTransit": 0, "safetyStock": 0, "version": new_version,
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})
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else:
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row["stock"] = float(new_stock)
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row["version"] = new_version
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m["inventoryVersion"] = new_version
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self._save(m)
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return {**event, "duplicate": False}
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def record_external(self, event: dict[str, Any]) -> dict:
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"""把外部上报事件追加进镜像流（供 replay 覆盖），按 eventId 幂等。"""
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m = self._load()
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eid = str(event.get("eventId") or "").strip()
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if not eid:
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raise ValueError("外部 WMS 事件缺少 eventId")
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for e in m.get("shortageEvents", []):
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if e.get("eventId") == eid:
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return e
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seq = len(m.get("shortageEvents") or []) + 1
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new_version = int(m.get("inventoryVersion") or 0) + 1
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rec = {
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"eventId": eid, "seq": seq, "offset": len(m.get("shortageEvents") or []),
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"type": str(event.get("type") or "SHORTAGE").upper(),
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"materialCode": str(event.get("materialCode") or ""),
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"name": event.get("name"), "unit": event.get("unit"),
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"oldStock": event.get("oldStock"), "newStock": event.get("newStock"),
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"shortageQty": event.get("shortageQty"), "occurredAt": event.get("occurredAt") or _now_ts(),
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"dedupKey": f"external:{eid}", "source": str(event.get("source") or "WMS-EXTERNAL"),
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"wmsVersion": new_version,
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}
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m.setdefault("shortageEvents", []).append(rec)
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m["inventoryVersion"] = new_version
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self._save(m)
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return rec
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# ---------------- 读：事件流重放 ----------------
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def replay(self, limit: int | None = None, order: str = "seq") -> list[dict]:
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"""按事件流重放（P0）。order: seq=逻辑顺序（乱序容忍基准）/ arrival=到达顺序。"""
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events = list(self._load().get("shortageEvents") or [])
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if (order or "seq").lower() == "arrival":
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events.sort(key=lambda e: int(e.get("offset") or 0))
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else:
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events.sort(key=lambda e: int(e.get("seq") or 0))
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if limit is not None:
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events = events[: max(0, int(limit))]
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return events
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def reset(self) -> dict:
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data = default_mirror()
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self._save(data)
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return self.status()
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_client: MockWmsClient | None = None
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def get_wms_client() -> MockWmsClient:
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global _client
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if _client is None:
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_client = MockWmsClient()
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return _client
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def reset_wms_client(path: Path | None = None) -> MockWmsClient:
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global _client
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_client = MockWmsClient(path)
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_client.reset()
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return _client
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