spring.net异常处理

接下来我们看一下SpringNetAop层的内容；此层主要是实现一些AOP的代码，以及特性和一个统一调用spring.net的类；记录日志我们使用Log4Net来实现；

1：Aspects 文件夹里存放的几个类分别是Spring.net几种AOP的通知模式；因为本实例主要是要演示异常的调用所以我们调用的是类LoggingThrowsAdvice.cs；有关Log4Net的运用大家可以搜索一下，不是本文的重点；这边有个要注意此处是类库运用Log4net，所以在读取配置文件时要写成@"bin\\Log4Net.config";而配置文件Log4Net.config属性要设置为：始终复制  嵌入的资源；

1：Aspects 文件夹里存放的几个类分别是Spring.net几种AOP的通知模式；因为本实例主要是要演示异常的调用所以我们调用的是类LoggingThrowsAdvice.cs；有关Log4Net的运用大家可以搜索一下，不是本文的重点；这边有个要注意此处是类库运用Log4net，所以在读取配置文件时要写成@"bin\\Log4Net.config";而配置文件Log4Net.config属性要设置为：始终复制  嵌入的资源；

using System.Linq;
using System.Text;
using SpringNetCommon;
using System.Reflection;
using Spring.Aop;
using log4net;
using log4net.Core;

[assembly: log4net.Config.XmlConfigurator(ConfigFile = @"bin\\Log4Net.config", Watch = true)]
namespace SpringNetAop.Aspects
{
    public class LoggingThrowsAdvice:IThrowsAdvice
    {
        private ILog logger;
        public LoggingThrowsAdvice()
        {
            logger = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
            log4net.Config.XmlConfigurator.Configure(new System.IO.FileInfo("Log4Net.config"));
        }

        public void AfterThrowing(Exception ex)
        {
            logger.Warn(
                String.Format("异常的内容为: {0}", ex));
        }
    }
}

Log4Net.config配置的内容如下：配置实现的功能是每天生成一个记录文件

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <section name="log4net" type="System.Configuration.IgnoreSectionHandler" />
  </configSections>
  <log4net>
    <appender name="RollingLogRootFileAppender" type="log4net.Appender.RollingFileAppender">
      <!--日志的路径-->
      <file value=".\Log\WanLog" />
      <!--是否覆盖，默认是追加true-->
      <appendToFile value="true"/>
      <!--文件滚动周期（每日创建新日志文件）-->
      <datePattern value="yyyyMMdd&quot;.txt&quot;"/>
      <!--设置无限备份=-1 ，最大备份数为1000-->
      <maxSizeRollBackups value="1000"/>
      <!--名称是否可以更改为false为可以更改-->
      <staticLogFileName value="false" />
      <!--文件滚动选项Composite表示根据日期和大小来滚动-->
      <rollingStyle value="Composite" />
      <layout type="log4net.Layout.PatternLayout">
        <param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss}[%t][%-5p][%c]%m%n%exception%n" />
      </layout>
    </appender>
    <root>
      <level value="All" />
      <appender-ref ref="RollingLogRootFileAppender" />
    </root>
  </log4net>
</configuration>

2:Attributes存放的是一个重写的特性；spring.net特性来定位要调用AOP；这边主要注意是要继承Attribute;

using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace SpringNetAop.Attributes
{
    public class LoggingAttributes:Attribute
    {
        public LoggingAttributes()
        {

        }
    }
}

3:SpringNetHelp文件夹存放的是一个统一调用spring.net的类；因为我把spring.net的配置文件存放在UI层；所以要注意调用的路径问题；配置文件我们在UI层进行；

using Spring.Core;
using Spring.Context;
using Spring.Context.Support;
using Spring.Core.IO;
using Spring.Objects.Factory;
using Spring.Objects.Factory.Xml;
namespace SpringNetAop.SpringNetHelp
{
    public class GetAppContext
    {
        private static IApplicationContext applicationContext = null;

        public GetAppContext()
        {

        }

        public static IApplicationContext ApplicationContext
        {
            get
            {
                applicationContext = new XmlApplicationContext("~/Config/Objects.xml");
                return applicationContext;
            }
        }
    }
}

接下来我们看一下逻辑层跟数据层的代码；

首先看一下数据层的代码；我们为要进行异常记录的方法加上特性[LoggingAttributes]

using System.Linq;
using System.Text;
using ISpringNetDAL;
using SpringNetAop.Attributes;
namespace SpringNetDAL
{
    public class UserOperateDAL:IUserOperateDAL
    {
        [LoggingAttributes]
        public string UserLogin(string UserName)
        {
             throw new Exception("我是DAL层的异常");
        }
    }
}

看BLL层的具体代码如下：

using Spring.Core;
using SpringNetAop;
using Spring.Core.IO;
using Spring.Objects.Factory.Xml;
using Spring.Objects.Factory;
using Spring.Context.Support;
using Spring.Context;
namespace SpringNetBLL
{
    public class UserOperate:BaseBLL
    {
        private IUserOperateDAL _userOperatedal = null;

        public UserOperate()
        {
        }

        [LoggingAttributes]
        public override string UserLogin(string UserName)
        {
            // throw new Exception("我是BLL层异常内容啊");
             _userOperatedal = (IUserOperateDAL)SpringNetAop.SpringNetHelp.GetAppContext.ApplicationContext.GetObject("UserOperateDal");
             return _userOperatedal.UserLogin(UserName);
        }
    }
}

<?xml version="1.0"?>
<configuration>

  <configSections>
    <sectionGroup name="spring">
      <!--提供Spring对应用程序上下文的支持-->
      <section name="context" type="Spring.Context.Support.ContextHandler, Spring.Core"/>
      <!--提供Spring对 对象容器的支持-->
      <section name="objects" type="Spring.Context.Support.DefaultSectionHandler, Spring.Core"/>
    </sectionGroup>
  </configSections>

  <spring>
    <context>
      <resource uri="file://~/Config/Objects.xml"/>
      <!--<resource uri="assembly://SpringNetUI/SpringNetUI.Config/Objects.xml"/>-->
    </context>
  </spring>

</configuration>

<?xml version="1.0" encoding="utf-8" ?>
<objects xmlns="http://www.springframework.net" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

  <object name="UserOperateDal" type="SpringNetDAL.UserOperateDAL,SpringNetDAL"/>

  <!--环绕通知拦截  运用特性-->
  <object id="aroundAdvisor" type="Spring.Aop.Support.AttributeMatchMethodPointcutAdvisor, Spring.Aop">
    <property name="Advice">
      <object type="SpringNetAop.Aspects.LoggingAroundAdvice, SpringNetAop" />
    </property>
    <property name="Attribute"
              value="SpringNetAop.Attributes.LoggingAttributes, SpringNetAop" />
  </object>

  <!--后置通知拦截  运用名称-->
  <object id="afterAdvisor" type="Spring.Aop.Support.NameMatchMethodPointcutAdvisor, Spring.Aop">
    <property name="Advice">
      <object type="SpringNetAop.Aspects.LoggingAfterAdvice, SpringNetAop" />
    </property>
    <property name="MappedNames">
      <list>
        <value>*UserLogin</value>
      </list>
    </property>
  </object>

  <!--异常通知拦截  程序所有都支持 不设置条件-->
  <object id="throwsAdvice"  type="SpringNetAop.Aspects.LoggingThrowsAdvice, SpringNetAop" />

  <object id="myServiceCommand" type="Spring.Aop.Framework.ProxyFactoryObject">
    <property name="Target">
      <object type="SpringNetBLL.UserOperate, SpringNetBLL" />
    </property>
    <property name="InterceptorNames">
      <list>
        <value>aroundAdvisor</value>
        <value>afterAdvisor</value>
        <value>throwsAdvice</value>
      </list>
    </property>
  </object>
</objects>