redis队列处理文件并发(日志处理)

来源：互联网发布：origin转换为矩阵编辑：程序博客网时间：2024/05/21 06:02

多线程操作同一个文件时会出现并发问题。解决的一个办法就是给文件加锁(lock),但是这样的话，一个线程操作文件时，其它的都得等待，这样的话性能非常差。

另外一个解决方案，就是先将数据放在队列中，然后开启一个线程，负责从队列中取出数据，再写到文件中。

using log4net;using RedisMvcApp.Models;using System;using System.Collections.Generic;using System.IO;using System.Linq;using System.Text;using System.Threading;using System.Web;using System.Web.Http;using System.Web.Mvc;using System.Web.Optimization;using System.Web.Routing;namespace RedisMvcApp{    // 注意: 有关启用 IIS6 或 IIS7 经典模式的说明，    // 请访问 http://go.microsoft.com/?LinkId=9394801    public class MvcApplication : System.Web.HttpApplication    {        protected void Application_Start()        {            log4net.Config.XmlConfigurator.Configure();//获取Log4Net配置信息(配置信息定义在Web.config文件中)            AreaRegistration.RegisterAllAreas();            WebApiConfig.Register(GlobalConfiguration.Configuration);            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);            RouteConfig.RegisterRoutes(RouteTable.Routes);            BundleConfig.RegisterBundles(BundleTable.Bundles);            //通过线程开启一个线程，然后不停的从队列中或数据            string filePath = Server.MapPath("/Log/");            ThreadPool.QueueUserWorkItem(o =>            {                while (true)                {                    try                    {                      //  if (MyExecptionAttribute.ExceptionQueue.Count > 0)                        if (MyExecptionAttribute.redisClent.GetListCount("errorException") > 0)                        {                          //  Exception  ex= MyExecptionAttribute.ExceptionQueue.Dequeue();//从队列中拿出数据                            string errorMsg = MyExecptionAttribute.redisClent.DequeueItemFromList("errorException");//从Redis队列中取出异常数据                            //if (ex != null)                            if(!string.IsNullOrEmpty(errorMsg))                            {                                //构建成一个完整的路径                              //  string fileName = filePath + DateTime.Now.ToString("yyyy-MM-dd").ToString() + ".txt";                                //string execptionMsg = ex.ToString();                             //   File.AppendAllText(fileName, errorMsg, Encoding.Default);//将异常写到文件中。                                ILog logger = LogManager.GetLogger("czbkError");                                logger.Error(errorMsg);//将异常信息写到Log4Net中.                            }                            else                            {                                Thread.Sleep(30);                            }                        }                        else                        {                            Thread.Sleep(30);//避免了CPU空转。                        }                    }                    catch (Exception ex)                    {                        //MyExecptionAttribute.ExceptionQueue.Enqueue(ex);                        MyExecptionAttribute.redisClent.EnqueueItemOnList("errorException", ex.ToString());                    }                }            }, filePath);        }    }}

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