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将Log4Net RollingFileAppender设置为每周滚动一次

rollingfileappender log4net .net c#

Unsliced · 技术社区 · 14 年前

这个 DatePattern 字符串必须是 SimpleDateFormatter will accept .

不幸的是,这意味着,开箱即用,这不包括能够将边界设置为周数。有几种方法可以在C#中获得这个值,但是我们不能很明显地扩展或者提供不同的实现 IDateFormatter RollingFileAppender ).

那么我们怎样才能得到一个Log4Net呢每周一次?

3 回复 | 直到 8 年前

Guillermo Ruffino 13 年前

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();
        }
    }
}

Stefan Egli 14 年前

不是那么简单。RollingFileAppender使用 DateTime.ToString() SimpleDateFormatter 也使用此方法,但它有点误导:您不能插入其他日期格式化程序,使滚动文件附加器按您想要的方式工作。

RollingFileAppender AdjustFileBeforeAppend() 方法。没有测试这一点,但这应该可以解决问题。

DevHang 8 年前

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));
            }
        }
    }
}

我的片段日志.config

<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>