LogStudy/LogStudy.DiagnosticLog/Program.cs

using System.Diagnostics;

namespace LogStudy.DiagnosticLog
{
    public class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("======== 诊断日志学习 ========");

            DemoA();
            DemoB();
        }

        static void DemoA()
        {
            var sourceName = "LogStudy-DiagnosticLog-DiagnosticSource";

            DiagnosticListener.AllListeners.Subscribe(new Observer<DiagnosticListener>(listener =>
            {
                if (listener.Name == sourceName)
                {
                    listener.Subscribe(new Observer<KeyValuePair<string, object?>>(eventData =>
                    {
                        Console.WriteLine($"Event Name: {eventData.Key}");
                        if (eventData.Value != null)
                        {
                            dynamic payload = eventData.Value;
                            Console.WriteLine($"CommandType:{payload.CommandType}");
                            Console.WriteLine($"CommandText:{payload.CommandText}");
                        }
                    }));
                }
            }));


            var diagnosticSource = new DiagnosticListener(sourceName);
            if (diagnosticSource.IsEnabled())
            {
                diagnosticSource.Write("CommandExecution", new
                {
                    CommandType = "SQL Server",
                    CommandText = "select * from tableA",
                });
            }
        }

        static void DemoB()
        {
            var sourceName = "LogStudy-DiagnosticLog-DiagnosticSource2";

            DiagnosticListener.AllListeners.Subscribe(new Observer<DiagnosticListener>(listener =>
            {
                if (listener.Name == sourceName)
                {
                    listener.SubscribeWithAdapter(new DiagnosticSourceCollector());
                }
            }));


            var diagnosticSource = new DiagnosticListener(sourceName);
            if (diagnosticSource.IsEnabled())
            {
                diagnosticSource.Write("CommandExcute", new
                {
                    CommandType = "SQL Server",
                    CommandText = "update tableA set id=2",
                });
            }
        }
    }
}