远程业务接口的 Glassfish ejb 引用解析错误
我已经创建了非常基本的 EJB3 有状态 bean，但无法远程访问它。 我得到：
引起：javax.naming.NamingException：远程业务接口com.s9120.ejb.Calculator的ejb引用解析错误[根异常是java.lang.ClassNotFoundException：com.s9120.ejb.Calculator]
我有1个bean和1个接口。 看起来接口没有部署（我使用的是GlassFish）： 下面是代码：
package com.calc.ejb;
import javax.ejb.Remote;
@Remote
public interface Calculator {
public Double multiply(Double multiplier, Double multiplicand);
public Double divide(Double dividend, Double divisor);
public Double add(Double addend, Double augend);
public Double subtract(Double minuend, Double subtrahend);
public void saveToMemory(Double number);
public Double retrieveFromMemory();
}
Bean：
package com.calc.ejb;
import javax.ejb.Remote;
import javax.ejb.Stateful;
/**
* Session Bean implementation class CalculatorBean
*/
@Stateful
@Remote(Calculator.class)
public class CalculatorBean implements Calculator{
/* Implementation */
}
访问它：
context = new InitialContext();
Calculator calculator = (Calculator) context.lookup("java:global/Zad3_s9120/CalculatorBean");
我是否必须执行一些步骤才能使接口可用于会话 bean？ 我使用“添加和删除”服务器菜单从 Eclipse 添加它。
I've created very basic EJB3 stateful bean but can't access it remotely.
I'm getting:
Caused by: javax.naming.NamingException: ejb ref resolution error for remote business interfacecom.s9120.ejb.Calculator [Root exception is java.lang.ClassNotFoundException: com.s9120.ejb.Calculator]
I have 1 bean and 1 interface.
It looks like the interface is not deployed (I'm using GlassFish):
Here is the code:
package com.calc.ejb;
import javax.ejb.Remote;
@Remote
public interface Calculator {
public Double multiply(Double multiplier, Double multiplicand);
public Double divide(Double dividend, Double divisor);
public Double add(Double addend, Double augend);
public Double subtract(Double minuend, Double subtrahend);
public void saveToMemory(Double number);
public Double retrieveFromMemory();
}
Bean:
package com.calc.ejb;
import javax.ejb.Remote;
import javax.ejb.Stateful;
/**
* Session Bean implementation class CalculatorBean
*/
@Stateful
@Remote(Calculator.class)
public class CalculatorBean implements Calculator{
/* Implementation */
}
Accessing it:
context = new InitialContext();
Calculator calculator = (Calculator) context.lookup("java:global/Zad3_s9120/CalculatorBean");
Do I have to do some steps to make interface available to session bean?
I'm adding it from Eclipse with "Add and Remove" server menu.
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据我所知，你们有不同的包裹。
您已将接口定义为：
但您的异常告诉您：
也许您的客户端项目中没有适当的类？
顺便说一句：您不需要在接口和 EJB 上都指定
@Remote。您只能在 EJB 上执行@Remote(MyClass.class)操作，或在接口上执行@Remote操作。From what I can see, you have different packages.
You've defined interface as:
but your exception tells you about:
Perhaps you don't have appropriate class in your client project?
BTW: You don't need to specify
@Remoteon both - the interface and EJB. You can do only@Remote(MyClass.class)on EJB or@Remoteon interface.