#region Apache License
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//
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// Licensed to the Apache Software Foundation (ASF) under one or more
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// contributor license agreements. See the NOTICE file distributed with
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// this work for additional information regarding copyright ownership.
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// The ASF licenses this file to you under the Apache License, Version 2.0
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// (the "License"); you may not use this file except in compliance with
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// the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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#endregion
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using System;
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using System.Text;
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using System.IO;
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using log4net.Util;
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namespace log4net.Util.PatternStringConverters
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{
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/// <summary>
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/// Write the current threads username to the output
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/// </summary>
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/// <remarks>
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/// <para>
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/// Write the current threads username to the output writer
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/// </para>
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/// </remarks>
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/// <author>Nicko Cadell</author>
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internal sealed class UserNamePatternConverter : PatternConverter
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{
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/// <summary>
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/// Write the current threads username to the output
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/// </summary>
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/// <param name="writer">the writer to write to</param>
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/// <param name="state">null, state is not set</param>
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/// <remarks>
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/// <para>
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/// Write the current threads username to the output <paramref name="writer"/>.
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/// </para>
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/// </remarks>
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override protected void Convert(TextWriter writer, object state)
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{
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#if (NETCF || SSCLI)
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// On compact framework there's no notion of current Windows user
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writer.Write( SystemInfo.NotAvailableText );
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#else
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try
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{
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System.Security.Principal.WindowsIdentity windowsIdentity = null;
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windowsIdentity = System.Security.Principal.WindowsIdentity.GetCurrent();
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if (windowsIdentity != null && windowsIdentity.Name != null)
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{
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writer.Write( windowsIdentity.Name );
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}
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}
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catch(System.Security.SecurityException)
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{
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// This security exception will occur if the caller does not have
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// some undefined set of SecurityPermission flags.
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LogLog.Debug(declaringType, "Security exception while trying to get current windows identity. Error Ignored.");
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writer.Write( SystemInfo.NotAvailableText );
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}
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#endif
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}
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#region Private Static Fields
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/// <summary>
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/// The fully qualified type of the UserNamePatternConverter class.
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/// </summary>
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/// <remarks>
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/// Used by the internal logger to record the Type of the
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/// log message.
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/// </remarks>
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private readonly static Type declaringType = typeof(UserNamePatternConverter);
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#endregion Private Static Fields
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}
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}
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