using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.IO;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using WIDESEAWCS_Core.Helper;
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namespace WIDESEAWCS_Core.LogHelper
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{
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public class LoggerHelper
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{
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// 读写锁，确保多线程环境下日志写入的线程安全
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static ReaderWriterLockSlim LogWriteLock = new ReaderWriterLockSlim();
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// 日志文件夹路径
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static string folderPath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, $"Log");
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// 记录日志的队列
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static Queue<string> logQueue = new Queue<string>();
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static LoggerHelper()
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{
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try
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{
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if (!Directory.Exists(folderPath))
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{
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Directory.CreateDirectory(folderPath);
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}
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}
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catch (Exception ex)
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{
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Debug.WriteLine(ex.Message);
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}
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="ex"></param>
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/// <param name="filePath"></param>
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public static void WriteError(Exception ex, string filePath = "")
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{
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StringBuilder builder = new StringBuilder();
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builder.Append("错误信息：");
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builder.Append(ex.Message);
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builder.Append(Environment.NewLine);
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builder.Append("错误源：");
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builder.Append(ex.Source);
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builder.Append(Environment.NewLine);
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builder.Append("错误堆栈：");
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builder.Append(ex.StackTrace);
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builder.Append(Environment.NewLine);
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builder.Append("错误类型：");
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builder.Append(ex.GetType().ToString());
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builder.Append(Environment.NewLine);
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builder.Append("错误方法：");
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builder.Append(ex.TargetSite?.ToString());
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builder.Append(Environment.NewLine);
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builder.Append(Environment.NewLine);
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WriteLogToFile($"Error_", builder.ToString(), filePath);
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}
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/// <summary>
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/// 将日志内容写入指定文件
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/// </summary>
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/// <param name="fileName">日志文件名</param>
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/// <param name="log">要记录的日志内容</param>
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/// <remarks>
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/// 该方法会确保线程安全地写入日志，若目录不存在会自动创建，
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/// 日志内容会自动添加时间戳并追加到文件末尾
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/// </remarks>
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public static void WriteLogToFile(string fileName, string log, string filePath = "")
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{
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try
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{
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// 进入写锁
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LogWriteLock.EnterWriteLock();
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string path = string.IsNullOrEmpty(filePath) ? folderPath : filePath;
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// 如果文件夹不存在，则创建文件夹
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if (!Directory.Exists(path))
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{
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Directory.CreateDirectory(path);
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}
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// 获取日志文件路径
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string logFilePath = Path.Combine(path, GetLastAccessFileName(fileName, path));
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// 获取当前时间
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DateTime now = DateTime.Now;
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// 构造日志内容
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string logContent = $"【{now}】{Environment.NewLine}{log}";
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// 将日志内容追加到日志文件中
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File.AppendAllText(logFilePath, logContent);
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WriteCompleted();
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}
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catch { }
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finally
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{
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// 退出写锁
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LogWriteLock.ExitWriteLock();
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}
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}
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static int size = 10 * 1024 * 1024;
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/// <summary>
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/// 获取最后一个可用的日志文件名
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/// </summary>
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/// <param name="fileName">日志文件基础名称</param>
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/// <returns>如果存在未达到大小限制的日志文件则返回该文件名，否则返回基于当前时间的新日志文件名</returns>
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/// <remarks>
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/// 该方法会遍历所有已存在的日志文件，返回第一个文件大小未超过限制的文件名。
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/// 如果没有符合条件的文件，则生成一个以当前时间命名的新日志文件名。
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/// </remarks>
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private static string GetLastAccessFileName(string fileName, string path)
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{
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foreach (var m in GetExistLogFileNames(fileName, path))
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{
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FileInfo fileInfo = new FileInfo(m);
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if (fileInfo.Length < size)
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{
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return m;
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}
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}
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// 返回一个新的默认当前时间的日志名称
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return $@"{fileName}_{DateTime.Now.ToString("yyyyMMddHHmmss")}.log";
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}
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/// <summary>
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/// 获取指定文件名模式的所有日志文件
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/// </summary>
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/// <param name="fileName">日志文件名前缀</param>
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/// <returns>匹配文件名模式的所有日志文件路径数组</returns>
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private static string[] GetExistLogFileNames(string fileName, string path)
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{
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string[] fileNames = Directory.GetFiles(path, fileName + "*.log");
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return fileNames;
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}
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private static string[] GetExistLogFileNames()
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{
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if (!string.IsNullOrEmpty(folderPath))
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return Directory.GetFiles(folderPath, "Error_*.log");
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else
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return new string[] { };
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}
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private static int controlFileQuantity = 100;
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protected static void WriteCompleted()
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{
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if (controlFileQuantity > 1)
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{
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try
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{
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string[] files = GetExistLogFileNames();
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if (files.Length > controlFileQuantity)
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{
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List<FileInfo> fileInfos = new List<FileInfo>();
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for (int i = 0; i < files.Length; i++)
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{
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fileInfos.Add(new FileInfo(files[i]));
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}
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fileInfos.Sort(new Comparison<FileInfo>((m, n) =>
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{
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return m.CreationTime.CompareTo(n.CreationTime);
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}));
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for (int i = 0; i < fileInfos.Count - controlFileQuantity; i++)
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{
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File.Delete(fileInfos[i].FullName);
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}
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}
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}
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catch
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{
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}
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}
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}
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}
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}
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