分布式对象之客户\服务器角色以及RMI初探

Warehouse centralHouse = get sub object;
double price = centralWarehouse.getPrice("xxx")

// wareHouse.java
import java.rmi.*
public interface WareHouse extends Remote{
  double getPrice(string desciption) throws RemoteException;
}

// WarehouseImpl.java
import java.rmi.*
import java.rmi.server.*
import java.util.*

public class WarehouseImpl extends UnicastRemoteObject implements WareHouse{
  private Map<String,Double> prices;
  public WarehouseImpl throws RemoteException{
    prices = new HashMap<>();
    prices.put("1xx",23.1);
    prices.put("2xx",23.4);
  }
  public double getPrice(String description) throws RemoteException{
    Double prices = prices.get(description);
    return prices?0:prices;
  }
}

// 下面代码构造并实现一个对象
import java.rmi.*
import java.naming.*
public class WarehouseServer {
  public static void main(String args[]){
    WarehouseImpl centralHouse = new WarehouseImpl();
    Context nameContext = new InitialContext();
    namingContext.bind("rmi:centrl_wareHouse",centralHouse);
  }
}