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NLogDirLayoutRenderer.cs
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NLogDirLayoutRenderer.cs
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//
// Copyright (c) 2004-2021 Jaroslaw Kowalski <jaak@jkowalski.net>, Kim Christensen, Julian Verdurmen
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// * Neither the name of Jaroslaw Kowalski nor the names of its
// contributors may be used to endorse or promote products derived from this
// software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
// THE POSSIBILITY OF SUCH DAMAGE.
//
using NLog.Internal;
#if !SILVERLIGHT && !NETSTANDARD1_3
namespace NLog.LayoutRenderers
{
using System;
using System.IO;
using System.Text;
using NLog.Config;
/// <summary>
/// The directory where NLog.dll is located.
/// </summary>
[LayoutRenderer("nlogdir")]
[AppDomainFixedOutput]
[ThreadAgnostic]
[ThreadSafe]
public class NLogDirLayoutRenderer : LayoutRenderer
{
/// <summary>
/// Initializes static members of the NLogDirLayoutRenderer class.
/// </summary>
static NLogDirLayoutRenderer()
{
var assembly = typeof(LogManager).GetAssembly();
var location = !string.IsNullOrEmpty(assembly.Location)
? assembly.Location
: new Uri(assembly.CodeBase).LocalPath;
NLogDir = Path.GetDirectoryName(location);
}
/// <summary>
/// Gets or sets the name of the file to be Path.Combine()'d with the directory name.
/// </summary>
/// <docgen category='Advanced Options' order='10' />
public string File { get; set; }
/// <summary>
/// Gets or sets the name of the directory to be Path.Combine()'d with the directory name.
/// </summary>
/// <docgen category='Advanced Options' order='10' />
public string Dir { get; set; }
private static string NLogDir { get; set; }
private string _nlogCombinedPath;
/// <summary>
/// Initializes the layout renderer.
/// </summary>
protected override void InitializeLayoutRenderer()
{
_nlogCombinedPath = null;
base.InitializeLayoutRenderer();
}
/// <summary>
/// Closes the layout renderer.
/// </summary>
protected override void CloseLayoutRenderer()
{
_nlogCombinedPath = null;
base.CloseLayoutRenderer();
}
/// <summary>
/// Renders the directory where NLog is located and appends it to the specified <see cref="StringBuilder" />.
/// </summary>
/// <param name="builder">The <see cref="StringBuilder"/> to append the rendered data to.</param>
/// <param name="logEvent">Logging event.</param>
protected override void Append(StringBuilder builder, LogEventInfo logEvent)
{
var path = _nlogCombinedPath ?? (_nlogCombinedPath = PathHelpers.CombinePaths(NLogDir, Dir, File));
builder.Append(path);
}
}
}
#endif