log4net/LogicalThreadContext.cs

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#region Copyright & License
//
// Copyright 2001-2005 The Apache Software Foundation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#endregion

// .NET Compact Framework 1.0 has no support for System.Runtime.Remoting.Messaging.CallContext
#if !NETCF

using System;
using System.Collections;

using log4net.Util;

namespace log4net
{
	/// <summary>
	/// The log4net Logical Thread Context.
	/// </summary>
	/// <remarks>
	/// <para>
	/// The <c>LogicalThreadContext</c> provides a location for <see cref="System.Runtime.Remoting.Messaging.CallContext"/> specific debugging 
	/// information to be stored.
	/// The <c>LogicalThreadContext</c> properties override any <see cref="ThreadContext"/> or <see cref="GlobalContext"/>
	/// properties with the same name.
	/// </para>
	/// <para>
	/// The Logical Thread Context has a properties map and a stack.
	/// The properties and stack can 
	/// be included in the output of log messages. The <see cref="log4net.Layout.PatternLayout"/>
	/// supports selecting and outputting these properties.
	/// </para>
	/// <para>
	/// The Logical Thread Context provides a diagnostic context for the current call context. 
	/// This is an instrument for distinguishing interleaved log
	/// output from different sources. Log output is typically interleaved
	/// when a server handles multiple clients near-simultaneously.
	/// </para>
	/// <para>
	/// The Logical Thread Context is managed on a per <see cref="System.Runtime.Remoting.Messaging.CallContext"/> basis.
	/// </para>
	/// </remarks>
	/// <example>Example of using the thread context properties to store a username.
	/// <code lang="C#">
	/// LogicalThreadContext.Properties["user"] = userName;
	///	log.Info("This log message has a LogicalThreadContext Property called 'user'");
	/// </code>
	/// </example>