Kothf.Logging.File 2.10.8

Kothf.Logging.File

A lightweight file logger implementation for the Microsoft.Extensions.Logging framework.

The code is heavily cribbed from the Azure App Service Logging Provider from the ASP.NET team.

The configuration reloading feature was eliminated.

Usage

appsettings.json

{
    "Logging": {
        "LogLevel": {
            "Default": "Information",
            "Microsoft.Hosting.Lifetime": "Warning"
        },
        "FileLog": {
            "LogLevel": {
                "Default": "Information",
                "Microsoft": "None",
                "Microsoft.Hosting.Lifetime": "None"
            }
        }
    },
    "FileLoggerOptions": {
        "LogDirectory": "C:\\Kothf.Logging.File\\logs",
        "FileName": "log-"
    }
}

Program.cs

using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Logging.Console;

namespace Kothf.Logging.File.Tests;

internal class Program
{
    internal static async Task Main(string[] args)
    {
        try
        {
            var builder = Host.CreateEmptyApplicationBuilder(new() { Args = args });

            builder.Configuration.AddJsonFile("appsettings.json", optional: false, reloadOnChange: false);

            builder.Logging.AddSimpleConsole(options =>
            {
                options.SingleLine = true;
                options.TimestampFormat = "yyyy-MM-dd HH:mm:ss.fff ";
            });

            // 1. Configure file logger options from configuration file
            var fileLoggerOptions = builder.Configuration.GetRequiredSection("FileLoggerOptions");
            // 2. Ensure log directory exists
            string? logDirectory = fileLoggerOptions.GetValue<string>("LogDirectory");
            ArgumentException.ThrowIfNullOrEmpty(logDirectory);
            Directory.CreateDirectory(logDirectory!);
            // 3. Register file logger options and add file logger
            builder.Services.Configure<FileLoggerOptions>(fileLoggerOptions);
            builder.Logging.AddFile();

            builder.Services
                .AddHostedService<TestsWorker>();

            var host = builder.Build();

            await host.RunAsync();
        }
        catch (OperationCanceledException)
        {
        }
        catch (Exception ex)
        {
            Console.Error.WriteLine(ex.ToString());
            Environment.ExitCode = 1;
        }
    }
}