Java 창고 관리 시스템의 분산 창고 관리 및 지역 물류 센터 전략

商品表 (Product)
- id (商品ID)
- name (商品名称)
- price (商品价格)
- ...

库存表 (Inventory)
- id (库存ID)
- product_id (商品ID)
- quantity (库存数量)
- ...

订单表 (Order)
- id (订单ID)
- product_id (商品ID)
- quantity (商品数量)
- status (订单状态)
- ...

public class WarehouseNode {
  private String id;
  private InventoryService inventoryService;

  public WarehouseNode(String id, InventoryService inventoryService) {
    this.id = id;
    this.inventoryService = inventoryService;
  }

  public void receiveOrder(Order order) {
    // 检查库存是否足够
    if (inventoryService.checkInventory(order.getProductId(), order.getQuantity())) {
      // 扣除库存
      inventoryService.reduceInventory(order.getProductId(), order.getQuantity());
      // 更新订单状态
      order.setStatus("已发货");
      // 发送物流信息
      ShippingService shippingService = new ShippingService();
      shippingService.ship(order);
    } else {
      order.setStatus("库存不足");
    }
  }
}

public class CentralNode {
  private List<WarehouseNode> warehouseNodes;

  public CentralNode(List<WarehouseNode> warehouseNodes) {
    this.warehouseNodes = warehouseNodes;
  }

  public void routeOrder(Order order) {
    for (WarehouseNode warehouseNode : warehouseNodes) {
      // 检查库存是否足够
      if (warehouseNode.getInventoryService().checkInventory(order.getProductId(), order.getQuantity())) {
        // 转发订单给仓库节点
        warehouseNode.receiveOrder(order);
        return;
      }
    }
    // 如果没有仓库节点有足够的库存，则更新订单状态为“库存不足”
    order.setStatus("库存不足");
  }
}

public class RegionalDistributionCenter {
  private List<WarehouseNode> warehouseNodes;

  public RegionalDistributionCenter(List<WarehouseNode> warehouseNodes) {
    this.warehouseNodes = warehouseNodes;
  }

  public void distributeOrders(List<Order> orders) {
    for (Order order : orders) {
      warehouseNodes.get(findNearestNode(order)).receiveOrder(order);
    }
  }

  private int findNearestNode(Order order) {
    // 根据订单的收货地址寻找最近的仓库节点
    // 这里可以使用一些地理位置相关的算法来实现
    // ...
  }
}