added logger to sample project

src/Downloader.Test/IntegrationTests/DownloadIntegrationTest.cs

@@ -1,5 +1,4 @@
 using Downloader.DummyHttpServer;
-using Downloader.Test.Helper;
 using Newtonsoft.Json;
 using System;
 using System.IO;
@@ -9,6 +8,7 @@
 using System.Threading.Tasks;
 using Xunit;
 using Xunit.Abstractions;
+using FileLogger = Downloader.Extensions.Logging.FileLogger;
 
 namespace Downloader.Test.IntegrationTests;
 
@@ -805,11 +805,11 @@ public async Task DownloadBigFileOnDisk()
     {
         // arrange
         var totalSize = 1024 * 1024 * 100; // 100MB
-        //Downloader.AddLogger(new FileLogger($"D:\\TestDownload\\DownloadBigFileOnDisk_{DateTime.Now.ToString("yyyyMMdd.HHmmss")}.log"));
         Config.ChunkCount = 8;
         Config.ParallelCount = 8;
         Config.MaximumBytesPerSecond = 0;
         URL = DummyFileHelper.GetFileWithNameUrl(Filename, totalSize);
+        //Downloader.AddLogger(FileLogger.Factory("D:\\TestDownload"));
         var actualFile = DummyData.GenerateOrderedBytes(totalSize);
 
         // act
@@ -851,13 +851,13 @@ public async Task DownloadBigFileWithMemoryLimitationOnDisk()
     {
         // arrange
         var totalSize = 1024 * 1024 * 1024; // 1GB
-        //Downloader.AddLogger(new FileLogger($"D:\\TestDownload\\DownloadBigFileOnDisk_{DateTime.Now.ToString("yyyyMMdd.HHmmss")}.log"));
         byte fillByte = 123;
         Config.ChunkCount = 16;
         Config.ParallelCount = 16;
         Config.MaximumBytesPerSecond = 0;
         Config.MaximumMemoryBufferBytes = 1024 * 1024 * 100; // 100MB
         URL = DummyFileHelper.GetFileWithNameUrl(Filename, totalSize, fillByte);
+        //Downloader.AddLogger(FileLogger.Factory("D:\\TestDownload"));
 
         // act
         await Downloader.DownloadFileTaskAsync(URL, FilePath);

src/Downloader.Test/Helper/FileLogger.cs → src/Downloader/Extensions/Logging/FileLogger.cs

@@ -1,22 +1,29 @@
-using Downloader.Extensions.Logging;
-using System;
+using System;
 using System.Collections.Concurrent;
 using System.IO;
+using System.Runtime.CompilerServices;
 using System.Threading;
 using System.Threading.Tasks;
 
-namespace Downloader.Test.Helper;
+namespace Downloader.Extensions.Logging;
 
-internal class FileLogger : ILogger, IDisposable
+public class FileLogger : ILogger, IDisposable
 {
-    private volatile bool _disposed = false;
-    private SemaphoreSlim _semaphore = new SemaphoreSlim(0);
+    private volatile bool _disposed;
+    private SemaphoreSlim _semaphore;
     protected readonly ConcurrentQueue<string> LogQueue;
     protected string LogPath;
     protected StreamWriter LogStream;
 
+    public static FileLogger Factory(string logPath, [CallerMemberName] string logName = default)
+    {
+        var filename = logName + "_" + DateTime.Now.ToString("yyyyMMdd.HHmmss") + ".log";
+        return new FileLogger(Path.Combine(logPath, filename));
+    }
+
     public FileLogger(string logPath)
     {
+        _semaphore = new SemaphoreSlim(0);
         LogQueue = new ConcurrentQueue<string>();
         LogPath = logPath;
         LogStream = new StreamWriter(FileHelper.CreateFile(logPath));
@@ -105,7 +112,6 @@ private async Task Writer()
     public void Dispose()
     {
         _disposed = true;
-        LogQueue.Clear();
         LogStream?.Dispose();
         LogStream = null;
     }
@@ -117,6 +123,6 @@ public async Task FlushAsync()
             await Task.Delay(100);
         }
 
-        await (LogStream?.FlushAsync() ?? Task.CompletedTask).ConfigureAwait(false);
+        await (LogStream?.FlushAsync() ?? Task.FromResult(0)).ConfigureAwait(false);
     }
 }

src/Downloader/Extensions/Logging/ILogger.cs

@@ -3,7 +3,7 @@
 
 namespace Downloader.Extensions.Logging;
 
-public interface ILogger
+public interface ILogger 
 {
     void Debug(string message);
     void Info(string message);