Exception handling Spring.NET.AOP-异常HandlerAdvice不替换自定义异常

这是我的第一次，也是Spring.NET和AOP的初学者

我想使用Aspect for Exception Hadling替换、包装和修改我的自定义异常

首先我定义了一些实体和DAO。从DAO中保存的方法中，我将抛出我的异常

仅供参考：这是一个愚蠢的样本

实体：

namespace ExceptionHandlingTutorial.Entities
{
    public class Customer
    {
        public long Id { get; set; }
        public string Name { get; set; }
    }
}

namespace ExceptionHandlingTutorial.Dao
{
    public interface ICustomerDao
    {
        void Save(Customer customer);
    }

    public class CustomerDao:ICustomerDao
    {
        #region Implementation of ICustomerDao

        public void Save(Customer customer)
        {
            throw new CustomerException(
                string.Format("Customer with id {0} already exist in repository",customer.Id));
        }

        #endregion
    }
}

namespace ExceptionHandlingTutorial
{
    public class CustomerException : Exception
    {
        public CustomerException(string msg)
            : base(msg)
        {

        }
    }
}

<?xml version="1.0" encoding="utf-8" ?>
<configuration>

  <configSections>
    <sectionGroup name="spring">
      <section name="context" type="Spring.Context.Support.ContextHandler, Spring.Core"/>
      <section name="objects" type="Spring.Context.Support.DefaultSectionHandler, Spring.Core"/>
    </sectionGroup>
  </configSections>

  <spring>

    <context>
      <resource uri="config://spring/objects"/>
    </context>

    <objects xmlns="http://www.springframework.net">

      <object id="customerDao" 
              type="ExceptionHandlingTutorial.Dao.CustomerDao, ExceptionHandlingTutorial"/>

      <object id="exceptionHandlerAdvice" 
              type="Spring.Aspects.Exceptions.ExceptionHandlerAdvice, Spring.Aop">

        <property name="ExceptionHandlers">
          <list>
            <value>on exception name CustomerException replace System.ArgumentException 'Something'</value>
          </list>
        </property>

      </object>

    </objects>

  </spring>
</configuration>

DAO:

namespace ExceptionHandlingTutorial.Entities
{
    public class Customer
    {
        public long Id { get; set; }
        public string Name { get; set; }
    }
}

namespace ExceptionHandlingTutorial.Dao
{
    public interface ICustomerDao
    {
        void Save(Customer customer);
    }

    public class CustomerDao:ICustomerDao
    {
        #region Implementation of ICustomerDao

        public void Save(Customer customer)
        {
            throw new CustomerException(
                string.Format("Customer with id {0} already exist in repository",customer.Id));
        }

        #endregion
    }
}

namespace ExceptionHandlingTutorial
{
    public class CustomerException : Exception
    {
        public CustomerException(string msg)
            : base(msg)
        {

        }
    }
}

<?xml version="1.0" encoding="utf-8" ?>
<configuration>

  <configSections>
    <sectionGroup name="spring">
      <section name="context" type="Spring.Context.Support.ContextHandler, Spring.Core"/>
      <section name="objects" type="Spring.Context.Support.DefaultSectionHandler, Spring.Core"/>
    </sectionGroup>
  </configSections>

  <spring>

    <context>
      <resource uri="config://spring/objects"/>
    </context>

    <objects xmlns="http://www.springframework.net">

      <object id="customerDao" 
              type="ExceptionHandlingTutorial.Dao.CustomerDao, ExceptionHandlingTutorial"/>

      <object id="exceptionHandlerAdvice" 
              type="Spring.Aspects.Exceptions.ExceptionHandlerAdvice, Spring.Aop">

        <property name="ExceptionHandlers">
          <list>
            <value>on exception name CustomerException replace System.ArgumentException 'Something'</value>
          </list>
        </property>

      </object>

    </objects>

  </spring>
</configuration>

这里有CustomException类定义：

namespace ExceptionHandlingTutorial.Entities
{
    public class Customer
    {
        public long Id { get; set; }
        public string Name { get; set; }
    }
}

namespace ExceptionHandlingTutorial.Dao
{
    public interface ICustomerDao
    {
        void Save(Customer customer);
    }

    public class CustomerDao:ICustomerDao
    {
        #region Implementation of ICustomerDao

        public void Save(Customer customer)
        {
            throw new CustomerException(
                string.Format("Customer with id {0} already exist in repository",customer.Id));
        }

        #endregion
    }
}

namespace ExceptionHandlingTutorial
{
    public class CustomerException : Exception
    {
        public CustomerException(string msg)
            : base(msg)
        {

        }
    }
}

<?xml version="1.0" encoding="utf-8" ?>
<configuration>

  <configSections>
    <sectionGroup name="spring">
      <section name="context" type="Spring.Context.Support.ContextHandler, Spring.Core"/>
      <section name="objects" type="Spring.Context.Support.DefaultSectionHandler, Spring.Core"/>
    </sectionGroup>
  </configSections>

  <spring>

    <context>
      <resource uri="config://spring/objects"/>
    </context>

    <objects xmlns="http://www.springframework.net">

      <object id="customerDao" 
              type="ExceptionHandlingTutorial.Dao.CustomerDao, ExceptionHandlingTutorial"/>

      <object id="exceptionHandlerAdvice" 
              type="Spring.Aspects.Exceptions.ExceptionHandlerAdvice, Spring.Aop">

        <property name="ExceptionHandlers">
          <list>
            <value>on exception name CustomerException replace System.ArgumentException 'Something'</value>
          </list>
        </property>

      </object>

    </objects>

  </spring>
</configuration>

在app.config中，我定义了

CustomerDao

对象和

ExceptionHandlerAdvice

对象，它们只替换

System.ArgumentException

的

CustomerException

我不确定

ExceptionHandlerAdvice

是否是自动代理，也不知道它是如何识别目标的

我相信它使用SpEL来定义规则，当出现异常时，它会抛出检查列表。 好的，这种类型的异常在列表中，我将应用一些建议

有人能向我解释一下这方面是如何确定目标的吗？例如，我只想将此方面应用于少数对象，而不是所有对象

我使用ref文档第14.3章异常处理，但找不到这些信息

这里是app.config:

namespace ExceptionHandlingTutorial.Entities
{
    public class Customer
    {
        public long Id { get; set; }
        public string Name { get; set; }
    }
}

namespace ExceptionHandlingTutorial.Dao
{
    public interface ICustomerDao
    {
        void Save(Customer customer);
    }

    public class CustomerDao:ICustomerDao
    {
        #region Implementation of ICustomerDao

        public void Save(Customer customer)
        {
            throw new CustomerException(
                string.Format("Customer with id {0} already exist in repository",customer.Id));
        }

        #endregion
    }
}

namespace ExceptionHandlingTutorial
{
    public class CustomerException : Exception
    {
        public CustomerException(string msg)
            : base(msg)
        {

        }
    }
}

<?xml version="1.0" encoding="utf-8" ?>
<configuration>

  <configSections>
    <sectionGroup name="spring">
      <section name="context" type="Spring.Context.Support.ContextHandler, Spring.Core"/>
      <section name="objects" type="Spring.Context.Support.DefaultSectionHandler, Spring.Core"/>
    </sectionGroup>
  </configSections>

  <spring>

    <context>
      <resource uri="config://spring/objects"/>
    </context>

    <objects xmlns="http://www.springframework.net">

      <object id="customerDao" 
              type="ExceptionHandlingTutorial.Dao.CustomerDao, ExceptionHandlingTutorial"/>

      <object id="exceptionHandlerAdvice" 
              type="Spring.Aspects.Exceptions.ExceptionHandlerAdvice, Spring.Aop">

        <property name="ExceptionHandlers">
          <list>
            <value>on exception name CustomerException replace System.ArgumentException 'Something'</value>
          </list>
        </property>

      </object>

    </objects>

  </spring>
</configuration>

抛出的异常类型为

CustomerException

非

ArgumentException

我还尝试在应用建议时使用DSL定义规则：

on exception (#e is T(ExceptionHandlingTutorial.CustomerException) translate new System.ArgumentException('XChange, Method Name'+ #method.Name, #e))

但仍然是CustomerException的抛出异常类型

---

谢谢你的帮助

Spring.NET aop为要应用建议的对象动态创建代理。当执行

var customerDao=（iccustomerdao）上下文[“customerDao”]时，Spring.NET将返回此代理。因此，正确配置后，您不会得到一个
CustomerDao
实例，而是从Spring获得一个aop代理来实现
ICCustomerDAO
接口。此代理拦截对
Save（…）
的调用，并应用您的异常处理建议

但是，您尚未配置
ProxyFactory
，因此在调用
var CustomerDao=（iccustomerdao）上下文[“CustomerDao”]时，您将不会获得代理，而是获得
CustomerDao
实例。您可以在调试器中检查这一点；检查
customerDao
的（运行时）类型

有几种方法可以配置代理工厂；我建议您在您的案例中使用，但您也可以使用普通或其他方式为每个对象手动配置

使用
advisorutoproxy
时，必须将以下对象定义添加到配置中：


*保存*
谢谢您的解释。现在我明白了：）我刚刚创建了基于类型名的自动代理。