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114 lines
4.4 KiB
C#
114 lines
4.4 KiB
C#
// Copyright (c) 2025-2026 GeWuYou
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// SPDX-License-Identifier: Apache-2.0
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using GFramework.Core.Abstractions.Logging;
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using GFramework.Core.Logging.Appenders;
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namespace GFramework.Core.Logging;
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/// <summary>
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/// 可配置的 Logger 工厂。
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/// </summary>
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internal sealed class ConfigurableLoggerFactory : ILoggerFactory, IDisposable
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{
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private readonly ILogAppender[] _appenders;
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private readonly LoggingConfiguration _config;
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private int _disposed;
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/// <summary>
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/// 初始化一个基于日志配置创建输出管线的工厂实例。
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/// </summary>
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/// <param name="config">日志配置。</param>
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/// <exception cref="ArgumentNullException"><paramref name="config"/> 为 <see langword="null" />。</exception>
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/// <exception cref="InvalidOperationException">配置中的某个 Appender 项为 <see langword="null" />。</exception>
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public ConfigurableLoggerFactory(LoggingConfiguration config)
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{
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_config = config ?? throw new ArgumentNullException(nameof(config));
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// 反序列化输入可能显式把集合写成 null，这里统一归一化为可安全枚举的空集合。
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_config.Appenders ??= [];
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_config.LoggerLevels ??= new Dictionary<string, LogLevel>(StringComparer.Ordinal);
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// 外部配置可能把集合项反序列化为 null，这里先给出可诊断异常，避免后续工厂链路出现不清晰的空引用失败。
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_appenders = _config.Appenders
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.Select(static appenderConfig => appenderConfig ??
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throw new InvalidOperationException(
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"Appender configuration cannot be null."))
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.Select(LoggingConfigurationLoader.CreateAppender)
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.ToArray();
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}
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/// <summary>
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/// 释放内部 Appender 持有的资源。
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/// </summary>
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public void Dispose()
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{
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if (Interlocked.Exchange(ref _disposed, 1) != 0)
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{
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return;
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}
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foreach (var appender in _appenders)
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{
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switch (appender)
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{
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case AsyncLogAppender asyncLogAppender:
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asyncLogAppender.Dispose();
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break;
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case IDisposable disposable:
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disposable.Dispose();
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break;
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}
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}
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}
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/// <summary>
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/// 为指定名称创建日志记录器，并应用最匹配的命名空间级别配置。
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/// </summary>
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/// <param name="name">日志记录器名称。</param>
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/// <param name="minLevel">调用方要求的最小日志级别下限；在未命中命名空间覆盖时生效。</param>
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/// <returns>可写入日志的记录器实例。</returns>
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/// <exception cref="ArgumentNullException"><paramref name="name"/> 为 <see langword="null" />。</exception>
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/// <remarks>
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/// 当配置文件与调用方同时提供默认级别时，会取两者中更严格的那一个；
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/// 若命中更具体的命名空间级别覆盖，则以该覆盖配置为准，即使其低于调用方传入的默认下限。
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/// </remarks>
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public ILogger GetLogger(string name, LogLevel minLevel = LogLevel.Info)
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{
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ArgumentNullException.ThrowIfNull(name);
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var effectiveLevel = _config.MinLevel > minLevel ? _config.MinLevel : minLevel;
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var bestMatchLength = -1;
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foreach (var kvp in _config.LoggerLevels)
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{
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var isExactMatch = string.Equals(name, kvp.Key, StringComparison.Ordinal);
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if (isExactMatch)
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{
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effectiveLevel = kvp.Value;
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break;
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}
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var isPrefixMatch = name.StartsWith(kvp.Key + ".", StringComparison.Ordinal);
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if (isPrefixMatch && kvp.Key.Length > bestMatchLength)
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{
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// 多个命名空间前缀都能命中时，最长前缀代表最具体的配置。
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bestMatchLength = kvp.Key.Length;
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effectiveLevel = kvp.Value;
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}
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}
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if (_appenders.Length == 0)
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{
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return new ConsoleLogger(name, effectiveLevel);
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}
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if (_appenders.Length == 1 && _appenders[0] is ConsoleAppender)
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{
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return new ConsoleLogger(name, effectiveLevel);
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}
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return new CompositeLogger(name, effectiveLevel, _appenders);
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}
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}
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