关联范围内的日志消息

本文关键字:消息 日志 范围内 关联 | 更新日期: 2023-09-27 18:33:53

我想使用日志记录范围关联日志记录消息。我正在寻找log4net,NLog或System.Diagnostics.Trace的实现。下面是演示该概念的基本实现。该程序的输出是这样的:

First level: Logging in the run method
First level: Logging one level down
Second scope: Another message
First level: Back from scope

下面是否有更健壮/通用/经过验证/易于使用的框架版本?

class Program
{
    private static readonly Log Log = new Log();
    private static void Main()
    {
        using (new LoggingScope("First level"))
        {
            Run();
        }
    }
    private static void Run()
    {
        Log.Info("Logging in the run method");
        Run2();
    }
    private static void Run2()
    {
        Log.Info("Logging one level down");
        using (new LoggingScope("Second scope"))
        {
            Log.Info("Another message");
        }
        Log.Info("Back from scope");
    }
}
internal class Log
{
    static Log()
    {
        CurrentScope = new Stack<string>();
    }
    private static Stack<string> CurrentScope { get; set; }
    public static void PushScope(string name)
    {
        CurrentScope.Push(name);
    }
    public static void PopScope()
    {
        CurrentScope.Pop();
    }
    public void Info(string message)
    {
        var currentScope = CurrentScope.Count == 0 ? string.Empty : CurrentScope.Peek();
        Console.WriteLine("{0}: {1}", currentScope, message);
    }
}
internal class LoggingScope : IDisposable
{
    private readonly string _name;
    public LoggingScope(string id)
    {
        _name = Guid.NewGuid().ToString();
        Log.PushScope(id);
        CallContext.SetData(_name, id);
    }
    public void Dispose()
    {
        Log.PopScope();
        CallContext.FreeNamedDataSlot(_name);
    }
}

关联范围内的日志消息

你正在寻找嵌套诊断上下文 (NDC):

    Log.Info("Logging one level down");
    using(ThreadContext.Stacks["NDC"].Push( requestid))
    {
        Log.Info("Another message");
    }
    Log.Info("Back from scope");

要获取日志输出中的范围,请在转换模式中使用 %property{NDC}:

    <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />

log4net.ThreadContext.Stacks (404)

log4net.NDC (已弃用) (404)

NLog 具有嵌套诊断逻辑上下文 (NDLC),可以像这样使用:

using (NLog.NestedDiagnosticsLogicalContext.Push("First Level"))
{
    Run();
}

你可以在 Layout -output 中使用 ${ndlc} 提取 NLog 作用域。

Microsoft扩展日志记录具有ILogger.BeginScope()方法。

你可以这样使用:

using (_logger.BeginScope("First Level"))
{
   _logger.LogDebug("Logon from {0}", request.UserId);
}

你可以在 Layout -output 中使用 ${ndlc} 提取 NLog 作用域。

另请参阅:https://github.com/NLog/NLog.Extensions.Logging/wiki/NLog-properties-with-Microsoft-Extension-Logging