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 <at> cc.com";
myMail.From =
"xx <at> 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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