How to initialize Custom appender in log4net

["Venkatasamy, Vanitha" <Va...@xpandcorp.com>]

Hi All,
   I am using custom appender to send an email if 20 errors are logged in Event Viewer within 5 minutes. I wrote the custom appender and placed the .cs file in the App_Code folder. The project is compiled and build successfully . But nothing is happening when the error is occurred in the application side. Please see the config settings and the custom appender. I think I am missing some config setting or assembly reference.

Config

      <configSections>
            <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
            <section name="MultiThresholdNotifyingAppender" type="Log4NetExtensions.MultiThresholdNotifyingAppender, MultiThresholdNotifyingAppender"/>
      </configSections>
       <log4net debug="true">
            <appender name="MultiThresholdNotifyingAppender" type="Log4NetExtensions.MultiThresholdNotifyingAppender,MultiThresholdNotifyingAppender">
                  <!--<evaluator type="log4net.Core.LevelEvaluator">
        <threshold value="Error"/>
      </evaluator>
      <Level value="Error"/>
      <TimeSpan  value="00:05:00"/>-->
                  <!--<evaluator type="log4net.Core.LevelEvaluator,log4net">-->
      <LevelThreshold  value="ERROR"/>
                  <!--</evaluator>-->
                  <appender-ref ref="EventLogAppender"/>
            </appender>
            <appender name="EventLogAppender" type="log4net.Appender.EventLogAppender">
                  <param name="LogName" value="PortalWebLogs"/>
                  <param name="ApplicationName" value="Portals"/>
                  <filter type="log4net.Filter.LevelRangeFilter">
                        <acceptOnMatch value="true"/>
                        <levelMin value="INFO"/>
                        <levelMax value="FATAL"/>
                  </filter>
                  <layout type="log4net.Layout.PatternLayout">
                        <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline"/>
                  </layout>
            </appender>
            <root>
                  <level value="ALL"/>
                  <priority value="ERROR"/>
                  <appender-ref ref="MultiThresholdNotifyingAppender"/>
                  <!--<appender-ref ref="EventLogAppender"/>-->
            </root>
      </log4net>


MultiThresholdNotifyingAppender.cs in App_code folder

using System;
using System.Collections.Generic;
using System.Web;
using log4net;

using log4net.Core;
using System.Threading;
using log4net.Appender;
using log4net.Config;
using System.Web.Mail;
using System.Windows.Forms;


/// <summary>
/// Summary description for Class1
/// </summary>



namespace Log4NetExtensions
{
    public class MultiThresholdNotifyingAppender : AppenderSkeleton
    {
        public MultiThresholdNotifyingAppender()
        {
        }
        private Queue<LoggingEvent> loggingEventQueue = new Queue<LoggingEvent>();


        private DateTime windowStart = DateTime.Now;


        Level _levelthreshold;
        TimeSpan _windowLength = TimeSpan.FromMinutes(1);//its 5 min but 1 min is to test
        int _hitThreshold = 1;//its 20 but 1 is to test the code

        protected override void Append(LoggingEvent loggingEvent)
        {
            sendEmail(); //.to test whether is function is being called..But no its not fired.

            if (loggingEvent.Level < LevelThreshold)
            {

                if (loggingEventQueue.Count == 0)
                    return;
                if ((loggingEvent.TimeStamp - windowStart) >= WindowLength)
                {
                    while (loggingEventQueue.Count > 0 && loggingEventQueue.Peek().TimeStamp - windowStart >= WindowLength)
                    {
                        loggingEventQueue.Dequeue();
                    }
                    windowStart = loggingEventQueue.Peek().TimeStamp;
                    return;
                }
            }
            loggingEventQueue.Enqueue(loggingEvent);
            //If this is the first error in the queue, start the time window.
            if (loggingEventQueue.Count == 1)
                windowStart = loggingEvent.TimeStamp;
            //Too few messages to qualify for notification.
            if (loggingEventQueue.Count < HitThreshold - 1)
                return;
            if (loggingEvent.TimeStamp - windowStart >= WindowLength)
            {

                sendEmail();
            }
            //After sending the message, clear the LoggingEvents and reset the time window.
            loggingEventQueue.Clear();
            windowStart = loggingEvent.TimeStamp;
        }
        public void sendEmail()
        {
            System.Web.Mail.MailMessage myMail = new System.Web.Mail.MailMessage();
            myMail.To = "cc@cc.com";
            myMail.From = "xx@xx.com";
            myMail.Subject = "Error";
            myMail.Body = "Hello World";
            SmtpMail.SmtpServer = "xx.x.xx.xx";

            SmtpMail.Send(myMail);

        }
        public Level LevelThreshold
        {
            get
            {
                return _levelthreshold;
            }
            set
            {
                _levelthreshold = value;
            }
        }


        public TimeSpan WindowLength
        {
            get
            {
                return _windowLength;
            }
            set
            {
                _windowLength = value;
            }
        }



        public int HitThreshold
        {
            get
            {
                return _hitThreshold;
            }
            set
            {
                _hitThreshold = value;
            }
        }
        public void Append(LoggingEvent[] loggingEvents)
        {
            foreach (LoggingEvent le in loggingEvents)
            {
                Append(le);
            }
        }
    }

}


Thanks,
Vanitha

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