本章主要内容是将异常信息写到队列中,然后通过线程写到文本文件中,速度非常快,没有阻塞和延迟加载
1.首先在Model中建一个类MyExceptionAttribute.cs
public class MyExceptionAttribute : HandleErrorAttribute //继承
{
public static Queue<Exception> exceptionQuese = new Queue<Exception>();
//重写父类方法,一抛异常就会执行这个方法
public override void OnException(ExceptionContext filterContext)
{
base.OnException(filterContext);
exceptionQuese.Enqueue(filterContext.Exception);//将异常依靠添加到队列中
filterContext.HttpContext.Response.Redirect("/Error.html");//出现异常后转到错误页
}
}
2.打开Global.asax文件,找到RegisterGlobalFilters并转到定义,让里面的方法new自己定义的类
public class FilterConfig
{
public static void RegisterGlobalFilters(GlobalFilterCollection filters)
{
//filters.Add(new HandleErrorAttribute());
filters.Add(new MyExceptionAttribute());
}
}
3.在Global.asax文件下添加如下内容,当应用程序一打开时就执行一个线程,使用线程池,好处是为了避免线程频繁的创建,节省CPU耗用内存
public class MvcApplication : System.Web.HttpApplication
{
protected void Application_Start()
{
log4net.Config.XmlConfigurator.Configure();//读取Log4Net配置信息
AreaRegistration.RegisterAllAreas(); WebApiConfig.Register(GlobalConfiguration.Configuration);
FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
RouteConfig.RegisterRoutes(RouteTable.Routes);
BundleConfig.RegisterBundles(BundleTable.Bundles); //string fileLogPath = Server.MapPath("/App_Data/");
//WaitCallback
ThreadPool.QueueUserWorkItem((a) =>
{
while (true)
{
if (MyExceptionAttribute.ExceptionQueue.Count > )
{
Exception ex = MyExceptionAttribute.ExceptionQueue.Dequeue();//出队
//string fileName = DateTime.Now.ToString("yyyy-MM-dd") + ".txt";
//File.AppendAllText(fileLogPath + fileName, ex.ToString(), Encoding.Default);
ILog logger = LogManager.GetLogger("errorMsg");
logger.Error(ex.ToString());
}
else
{
Thread.Sleep();//如果队列中没有数据,休息避免造成CPU的空转.
}
}
});
}
}
4.打开Web.config,在configuration—configSections节点内添加
<configuration>
<configSections>
<!--Log4Net配置-->
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
</configSections>
紧跟着在上面的</configSections>后面添加如下内容
<log4net>
<!-- OFF, FATAL, ERROR, WARN, INFO, DEBUG, ALL -->
<!-- Set root logger level to ERROR and its appenders -->
<root>
<level value="ALL"/>
<appender-ref ref="SysAppender"/>
</root> <!-- Print only messages of level DEBUG or above in the packages -->
<logger name="WebLogger">
<level value="ERROR"/>
</logger> <appender name="SysAppender" type="log4net.Appender.RollingFileAppender,log4net" >
<param name="File" value="App_Data/" />
<param name="AppendToFile" value="true" />
<param name="RollingStyle" value="Date" />
<param name="DatePattern" value=""Logs_"yyyyMMdd".txt"" />
<param name="StaticLogFileName" value="false" />
<layout type="log4net.Layout.PatternLayout,log4net">
<param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" />
<param name="Header" value=" ----------------------header-------------------------- " />
<param name="Footer" value=" ----------------------footer-------------------------- " />
</layout>
</appender>
<appender name="consoleApp" type="log4net.Appender.ConsoleAppender,log4net">
<layout type="log4net.Layout.PatternLayout,log4net">
<param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" />
</layout>
</appender>
</log4net>
</configuration>
5.建一个控制器Test测试一下
public ActionResult Test()
{
int a = ;
int b = ;
int c = a / b;
return Content(c.ToString());
}