Install the Log4Net RollingFileAppender tray, which will load per week

Question

The string DatePatternshould be something to accept SimpleDateFormatter.

Unfortunately, this means that out of the box this does not include the ability to set the border as the week number. There are ways to get this value in C #, but it’s not obvious that we can extend SimpleDateFormatteror provide another implementation IDateFormatterand use it instead (or even in a custom one RollingFileAppender).

So, how can we make Log4Net RollingFileAppenderto ride weekly?

Answer 1

. , .

class RollingOverWeekFileAppender : RollingFileAppender
{
    private DateTime nextWeekendDate;

    public RollingOverWeekFileAppender()
    {
        CalcNextWeekend(DateTime.Now);
    }

    private void CalcNextWeekend(DateTime time)
    { 
        // Calc next sunday
        time = time.AddMilliseconds((double)-time.Millisecond);
        time = time.AddSeconds((double)-time.Second);
        time = time.AddMinutes((double)-time.Minute);
        time = time.AddHours((double)-time.Hour);
        nextWeekendDate = time.AddDays((double)(7 - (int)time.DayOfWeek));
    }

    protected override void AdjustFileBeforeAppend()
    {
        DateTime now = DateTime.Now;

        if (now >= nextWeekendDate)
        {
            CalcNextWeekend(now);
            // As you included the day and month AdjustFileBeforeAppend takes care of creating 
            // new file with the new name
            base.AdjustFileBeforeAppend();
        }
    }
}

Answer 2

. RollingFileAppender DateTime.ToString() " ". log4net , SimpleDateFormatter , : , , .

roll by week, RollingFileAppender AdjustFileBeforeAppend(). , .

Answer 3

I also encounter the same problem to collapse the log file weekly by testing the GLM solution method, somehow it does not work on the version of log4net (1.2.15.0), but is inspired by its answer and is studying the source code, I made a decision to generate the log file by name per week (named as Sunday date)

namespace log4net.Appender
{
    class RollingOverWeekFileAppender : RollingFileAppender
    {
        public RollingOverWeekFileAppender()
        {
            IDateTime dt = new SundayDateTime();
            DateTimeStrategy = dt;
        }

        class SundayDateTime : IDateTime
        {
            public DateTime Now
            {
                get { return CalcThisSunday(DateTime.Now); }
            }

            private DateTime CalcThisSunday(DateTime time)
            {
                // Calc this sunday
                time = time.AddMilliseconds((double)-time.Millisecond);
                time = time.AddSeconds((double)-time.Second);
                time = time.AddMinutes((double)-time.Minute);
                time = time.AddHours((double)-time.Hour);
                return time.AddDays((double)(-(int)time.DayOfWeek));
            }
        }
    }
}

And my fragment of the log.config file

<appender name="Log" type="log4net.Appender.RollingOverWeekFileAppender">
  <file type="log4net.Util.PatternString">
    <conversionPattern value=".\log-" />
  </file>
  <lockingModel type="log4net.Appender.FileAppender+MinimalLock"/>
  <encoding value="utf-8" />
  <staticLogFileName value="false"/>
  <appendToFile value="true" />
  <rollingStyle value="Date"/>
  <datePattern value="yyyyMMdd.lo\g"/>
  <layout type="log4net.Layout.PatternLayout">
    <conversionPattern value="%date&#9;%level&#9;%logger{1}&#9;%message%newline" />
  </layout>
</appender>