C#线程执行超时处理与并发线程数控制实例

本文实例讲述了C#线程执行超时处理与并发线程数控制的方法。分享给大家供大家参考。具体实现方法如下：

特别说明：

1、为了测试方便，这里对存储过程的执行是模拟的

2、这里限制了并发执行存储过程的最大个数，但并没有对并发线程数进行控制，与文章标题略有不符，但程序稍做改动即可控制并发线程数

代码如下：

代码如下:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.OracleClient;
using System.Diagnostics;
using System.IO;
using System.ServiceProcess;
using System.Text;
using System.Threading;
using System.Timers;
using System.Xml;
using DBUtil;
using FQDService.Utils;

namespace FQDService
{
    /// <summary>
    /// FQD服务
    /// </summary>
    partial class FQDService : ServiceBase
    {
        #region 变量
        /// <summary>
        /// 存储过程配置文档
        /// </summary>
        public static XmlDocument doc;
        /// <summary>
        /// 执行存储过程线程数锁
        /// </summary>
        public static Object lockTreadCount = new Object();
        /// <summary>
        /// 执行存储过程超时时间
        /// </summary>
        public static int timeout = 1000;
        /// <summary>
        /// 等待执行存储过程时间间隔
        /// </summary>
        public static int interval = 100;
        /// <summary>
        /// 执行存储过程最大数
        /// </summary>
        public static int maxRunProcCount = 5;
        /// <summary>
        /// 执行存储过程数
        /// </summary>
        public static int runProcCount = 0;
        #endregion

#region 构造函数
        public FQDService()
        {
            InitializeComponent();
        }
        #endregion

#region 启动
        protected override void OnStart(string[] args)
        {
            // TODO: 在此处添加代码以启动服务。
            doc = XMLHelper.GetXmlDocument();
            System.Timers.Timer timer = new System.Timers.Timer(60 * 1000);
            timer.Elapsed += new System.Timers.ElapsedEventHandler(RunProc);
            timer.Start();
        }
        #endregion

#region 结束
        protected override void OnStop()
        {
            // TODO: 在此处添加代码以执行停止服务所需的关闭操作。
        }
        #endregion

#region 执行存储过程
        /// <summary>
        /// 执行存储过程
        /// </summary>
        public void RunProc(object sender, ElapsedEventArgs e)
        {
            try
            {
                Random rnd = new Random();
                XmlNode rootNode = doc.SelectSingleNode("settings");

foreach (XmlNode procNode in rootNode.ChildNodes) // 遍历Proc
                {
                    string procName = procNode.SelectSingleNode("Name").InnerText.Trim();
                    string runTime = procNode.SelectSingleNode("RunTime").InnerText.Trim();

if (DateTime.Now.ToString("HH:mm") == "14:55")
                    {
                        bool finish = false; //存储过程是否执行完毕
                        Thread thread = null;
                        thread = new Thread(new ParameterizedThreadStart(delegate(object obj)
                        {
                            #region 等待执行存储过程
                            lock (lockTreadCount)
                            {
                                while (runProcCount >= maxRunProcCount)
                                {
                                    Thread.Sleep(interval);
                                }
                                runProcCount++;
                            }
                            #endregion

#region 执行存储过程超时处理
                            Thread threadTimer = new Thread(new ParameterizedThreadStart(delegate(object obj2)
                            {
                                Thread.Sleep(timeout);
                                if (finish == false)
                                {
                                    FileLogger.WriteLog(string.Format("存储过程{0}执行超时", procName));
                                    if (thread != null)
                                    {
                                        try
                                        {
                                            thread.Abort();
                                        }
                                        catch (Exception ex)
                                        {
                                            FileLogger.WriteErrorLog(string.Format("存储过程{0}终止线程出错：{1}", procName, ex.Message));
                                        }
                                    }
                                }
                            }));
                            threadTimer.Start();
                            #endregion

#region 为执行存储过程准备参数
                            XmlNodeList paramList = procNode.SelectSingleNode("Params").ChildNodes;
                            OracleParameter[] oracleParams = new OracleParameter[paramList.Count];
                            for (int i = 0; i < paramList.Count; i++) // 遍历param
                            {
                                XmlNode paramNode = paramList[i];
                                string paramName = paramNode.SelectSingleNode("Name").InnerText.Trim();
                                string paramType = paramNode.SelectSingleNode("Type").InnerText.Trim();
                                string paramValue = paramNode.SelectSingleNode("Value").InnerText.Trim();

oracleParams[i] = new OracleParameter(paramName, Enum.Parse(typeof(OracleType), paramType));
                                if ((OracleType)Enum.Parse(typeof(OracleType), paramType) == OracleType.DateTime)
                                {
                                    DateTime now = DateTime.Now;
                                    string[] paramValueArray = paramValue.Split(':');
                                    oracleParams[i].Value = new DateTime(now.Year, now.Month, now.Day, int.Parse(paramValueArray[0]), int.Parse(paramValueArray[1]), int.Parse(paramValueArray[2]));
                                }
                                else
                                {
                                    oracleParams[i].Value = paramValue;
                                }
                            }
                            #endregion

try
                            {
                                try
                                {
                                    #region 执行存储过程
                                    FileLogger.WriteLog(string.Format("开始执行存储过程{0}", procName));

//执行存储过程
                                    //OracleHelper.RunProcedure(procName, oracleParams);

//模拟执行存储过程
                                    Thread.Sleep(rnd.Next(100, 1900));

FileLogger.WriteLog(string.Format("存储过程{0}执行成功", procName));
                                    finish = true;
                                    #endregion
                                }
                                catch (Exception ex)
                                {
                                    #region 执行存储过程失败日志
                                    StringBuilder sbParams = new StringBuilder();
                                    foreach (OracleParameter oracleParam in oracleParams)
                                    {
                                        sbParams.Append(string.Format("{0}:{1},", oracleParam.ParameterName, oracleParam.Value.ToString()));
                                    }
                                    string strParams = "";
                                    if (sbParams.Length > 0) strParams = sbParams.ToString(0, sbParams.Length - 1);
                                    FileLogger.WriteErrorLog(string.Format("存储过程执行失败{0}({1})：{2}", procName, strParams, ex.Message));
                                    #endregion
                                }
                            }
                            catch
                            {
                                //捕获线程终止异常
                            }
                            finally
                            {
                                runProcCount--;
                            }
                        }));
                        thread.Start();
                    }
                }
            }
            catch (Exception ex)
            {
                FileLogger.WriteErrorLog(ex.Message);
            }
        }
        #endregion

}
}

希望本文所述对大家的C#程序设计有所帮助。