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DefaultLogProvider.cs
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97 lines (82 loc) · 3.36 KB
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namespace ScriptCs.Contracts
{
using System;
public class DefaultLogProvider : ILogProvider
{
private readonly ILogProvider _provider = ResolveLogProvider() ?? new NullLogProvider();
[Obsolete("Should not be called directly. Instead, call a method on LogProviderExtensions.")]
public Logger GetLogger(string name)
{
return _provider.GetLogger(name);
}
/// <summary>
/// Opens a nested diagnostics context. Not supported in <seealso cref="http://msdn.microsoft.com/entlib"/>.
/// </summary>
/// <param name="message">The message to add to the diagnostics context.</param>
/// <returns>A disposable that when disposed removes the message from the context.</returns>
public IDisposable OpenNestedContext(string message)
{
return _provider.OpenNestedContext(message);
}
/// <summary>
/// Opens a mapped diagnostics context. Not supported in <seealso cref="http://msdn.microsoft.com/entlib"/>.
/// </summary>
/// <param name="key">A key.</param>
/// <param name="value">A value.</param>
/// <returns>A disposable that when disposed removes the map from the context.</returns>
public IDisposable OpenMappedContext(string key, string value)
{
return _provider.OpenMappedContext(key, value);
}
private static ILogProvider ResolveLogProvider()
{
var libLogProvider = LibLog.LogProvider.ResolveLogProvider();
return libLogProvider == null ? null : new LibLogAdapter(libLogProvider);
}
private class NullLogProvider : ILogProvider
{
private static readonly Logger logger = (_, __, ___, ____) => false;
private static readonly Disposable disposable = new Disposable();
[Obsolete("Should not be called directly. Instead, call a method on LogProviderExtensions.")]
public Logger GetLogger(string name)
{
return logger;
}
public IDisposable OpenNestedContext(string message)
{
return disposable;
}
public IDisposable OpenMappedContext(string key, string value)
{
return disposable;
}
private sealed class Disposable : IDisposable
{
public void Dispose()
{
}
}
}
private class LibLogAdapter : ILogProvider
{
private readonly LibLog.ILogProvider _libLogProvider;
public LibLogAdapter(LibLog.ILogProvider libLogProvider)
{
_libLogProvider = libLogProvider;
}
public Logger GetLogger(string name)
{
return (logLevel, messageFunc, exception, formatParameters) =>
_libLogProvider.GetLogger(name)((LibLog.LogLevel)logLevel, messageFunc, exception, formatParameters);
}
public IDisposable OpenNestedContext(string message)
{
return _libLogProvider.OpenNestedContext(message);
}
public IDisposable OpenMappedContext(string key, string value)
{
return _libLogProvider.OpenMappedContext(key, value);
}
}
}
}