using System;
using System.IO;
using System.Threading;public static class LogManager
{private static readonly object _fileLock = new object(); // 线程安全锁private const int MaxFiles = 100;                        // 最大文件数限制private const string LogDirectory = "Logs";              // 日志目录private const string FilePrefix = "log_";                // 文件名前缀private const string FileExtension = ".txt";             // 文件扩展名/// <summary>/// 安全写入日志（自动处理文件滚动和清理）/// </summary>public static void SaveMessageWithRotation(string message){try{// 确保日志目录存在Directory.CreateDirectory(LogDirectory);// 线程安全操作lock (_fileLock){// 生成带时间戳的新文件名string timestamp = DateTime.Now.ToString("yyyyMMdd_HHmmssfff");string newFilePath = Path.Combine(LogDirectory, $"{FilePrefix}{timestamp}{FileExtension}");// 写入新文件File.WriteAllText(newFilePath, message);// 执行文件清理（异步不阻塞当前操作）ThreadPool.QueueUserWorkItem(_ => CleanOldLogs());}}catch (Exception ex){// 这里应该用真正的日志系统记录错误（如NLog）Console.WriteLine($"日志写入失败: {ex.Message}");}}/// <summary>/// 清理旧日志文件（保留最新100个）/// </summary>private static void CleanOldLogs(){try{var directory = new DirectoryInfo(LogDirectory);if (!directory.Exists) return;// 获取所有日志文件并按创建时间排序var files = directory.GetFiles($"{FilePrefix}*{FileExtension}").OrderBy(f => f.CreationTime).ToArray();// 删除超出数量的旧文件if (files.Length > MaxFiles){foreach (var file in files.Take(files.Length - MaxFiles)){try { file.Delete(); }catch { /* 忽略删除失败 */ }}}}catch{// 清理失败不影响主流程}}
}