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@@ -0,0 +1,77 @@
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+using log4net;
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+using log4net.Config;
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+using Microsoft.Extensions.Logging;
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+using System.Collections.Concurrent;
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+
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+namespace Esim.SendMail.Logging;
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+
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+public class Log4NetProvider : ILoggerProvider
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+{
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+ private readonly ConcurrentDictionary<string, Log4NetLogger> _loggers = new();
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+
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+ public Log4NetProvider() { }
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+
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+ public ILogger CreateLogger(string categoryName)
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+ {
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+ return _loggers.GetOrAdd(categoryName, name => new Log4NetLogger(name));
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+ }
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+
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+ public void Dispose()
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+ {
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+ _loggers.Clear();
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+ }
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+}
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+
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+public class Log4NetLogger : ILogger
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+{
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+ private readonly ILog _log;
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+
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+ public Log4NetLogger(string categoryName)
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+ {
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+ _log = LogManager.GetLogger(typeof(Log4NetProvider).Assembly, categoryName);
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+ }
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+
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+ public IDisposable? BeginScope<TState>(TState state) where TState : notnull => null;
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+
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+ public bool IsEnabled(LogLevel logLevel)
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+ {
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+ return logLevel switch
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+ {
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+ LogLevel.Critical => _log.IsFatalEnabled,
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+ LogLevel.Error => _log.IsErrorEnabled,
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+ LogLevel.Warning => _log.IsWarnEnabled,
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+ LogLevel.Information => _log.IsInfoEnabled,
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+ LogLevel.Debug => _log.IsDebugEnabled,
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+ LogLevel.Trace => _log.IsDebugEnabled,
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+ _ => false
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+ };
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+ }
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+
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+ public void Log<TState>(LogLevel logLevel, EventId eventId, TState state, Exception? exception, Func<TState, Exception?, string> formatter)
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+ {
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+ if (!IsEnabled(logLevel)) return;
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+
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+ var message = formatter(state, exception);
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+ if (string.IsNullOrEmpty(message) && exception == null) return;
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+
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+ switch (logLevel)
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+ {
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+ case LogLevel.Critical: _log.Fatal(message, exception); break;
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+ case LogLevel.Error: _log.Error(message, exception); break;
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+ case LogLevel.Warning: _log.Warn(message, exception); break;
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+ case LogLevel.Information: _log.Info(message, exception); break;
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+ case LogLevel.Debug: _log.Debug(message, exception); break;
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+ case LogLevel.Trace: _log.Debug(message, exception); break;
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+ }
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+ }
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+}
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+
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+public static class Log4NetExtensions
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+{
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+ public static ILoggingBuilder AddLog4Net(this ILoggingBuilder builder, string configPath)
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+ {
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+ XmlConfigurator.Configure(new FileInfo(configPath));
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+ builder.AddProvider(new Log4NetProvider());
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+ return builder;
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+ }
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+}
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