当某些 LogicalThreadContext.Property 在 log4net 中具有特定值时如何忽略日志

Question

我使用 ADO.NET appender 和 MySQL 作为后端数据库

我在附加程序设置中添加了以下内容

<parameter>
      <parameterName value="_context" />
      <dbType value="String" />
      <size value="25" />
      <layout type="log4net.Layout.RawPropertyLayout">
        <key value="Context" />
      </layout>
    </parameter>

    <filter type="log4net.Filter.PropertyFilter">
      <key value="Context" />
      <stringToMatch value="Transaction" />
      <acceptOnMatch value="false" />
    </filter>

我正在做的是记录大量场景。但是当 Context Property 的值为 ="Transaction"

时，我想跳过转到 DB 命令的日志

但它似乎不起作用。 请让我知道我需要更正的地方

附言

我什至尝试过关注

public class CustomFilter : FilterSkeleton
{

    private readonly IList<IFilter> filters = new List<IFilter>();        
    public override FilterDecision Decide(LoggingEvent loggingEvent)
    {
        if (loggingEvent == null)
            throw new ArgumentNullException("loggingEvent");

        if (filters.All(x => x.Decide(loggingEvent) != FilterDecision.Accept))
        {
            return FilterDecision.Neutral;
        }

        // All conditions are true
        if (AcceptOnMatch)
            return FilterDecision.Accept;
        else
            return FilterDecision.Deny;
    }

    public IFilter Filter
    {
        set { filters.Add(value); }
    }

    public bool AcceptOnMatch { get; set; }

}

与

  <filter type="MyNameSpace.CustomFilter,  MyAssembly">

      <filter type="log4net.Filter.PropertyFilter">
        <key value="Context" />
        <stringToMatch value="Transaction" />
        <acceptOnMatch value="false" />
      </filter>      
    </filter>
    <filter type="log4net.Filter.LevelRangeFilter">
      <acceptOnMatch value="true" />
      <levelMin value="DEBUG" />
      <levelMax value="FATAL" />
    </filter>

Answer 1

所以还是有可能的。

有一个loggingEvent.GetProperties() 提供自定义字段。

你CustomFilter 可能看起来像这样：

    public class CustomFilter : FilterSkeleton
    {
        private readonly IList<IFilter> _filters = new List<IFilter>();
        public override FilterDecision Decide(LoggingEvent loggingEvent)
        {
            if (loggingEvent == null)
                throw new ArgumentNullException(nameof(loggingEvent));

            var properties = loggingEvent.GetProperties();
            if (properties != null && (properties[Key] as string ?? properties[Key]?.ToString()) == StringToMatch )
            {
                return AcceptOnMatch ? FilterDecision.Accept : FilterDecision.Deny;
            }

            if (_filters.All(x => x.Decide(loggingEvent) != FilterDecision.Accept))
            {
                return FilterDecision.Neutral;
            }

            // All conditions are true
            return AcceptOnMatch ? FilterDecision.Accept : FilterDecision.Deny;
        }

        public IFilter Filter
        {
            set => _filters.Add(value);
        }

        public bool AcceptOnMatch { get; set; }

        public string Key { get; set; }
        public string StringToMatch { get; set; }
    }

我没有用多个过滤器测试它，但这是一个开始。