#region License
/*
* Copyright 2002-2005 the original author or authors.
*
* 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
#region Imports
using System;
using System.Runtime.Remoting.Messaging;
using Spring.Util;
#endregion
namespace Spring.Threading{
/// <summary>
/// An abstraction to safely store "ThreadStatic" data.
/// </summary>
/// <remarks>
/// By default, <see cref="CallContext"/> is used to store thread-specific data.
/// You may switch the storage strategy by calling <see cref="SetStorage(IThreadStorage)"/>.<p/>
/// <b>NOTE:</b> Access to the underlying storage is not synchronized for performance reasons.
/// You should call <see cref="SetStorage(IThreadStorage)"/> only once at application startup!
/// </remarks>
/// <author>Erich Eichinger</author>
public sealed class LogicalThreadContext
{
/// <summary>
/// Holds the current <see cref="IThreadStorage"/> strategy.
/// </summary>
/// <remarks>
/// Access to this variable is not synchronized on purpose for performance reasons.
/// Setting a different <see cref="IThreadStorage"/> strategy should happen only once
/// at application startup.
/// </remarks>
private static IThreadStorage threadStorage = new CallContextStorage();
/// <summary>
/// Set the new <see cref="IThreadStorage"/> strategy.
/// </summary>
public static void SetStorage(IThreadStorage storage)
{
AssertUtils.ArgumentNotNull(storage, "storage");
threadStorage = storage;
}
private LogicalThreadContext()
{
throw new NotSupportedException("must not be instantiated");
}
/// <summary>
/// Retrieves an object with the specified name.
/// </summary>
/// <param name="name">The name of the item.</param>
/// <returns>The object in the context associated with the specified name or null if no object has been stored previously</returns>
public static object GetData(string name)
{
return threadStorage.GetData(name);
}
/// <summary>
/// Stores a given object and associates it with the specified name.
/// </summary>
/// <param name="name">The name with which to associate the new item.</param>
/// <param name="value">The object to store in the current thread's context.</param>
public static void SetData(string name, object value)
{
threadStorage.SetData(name, value);
}
/// <summary>
/// Empties a data slot with the specified name.
/// </summary>
/// <param name="name">The name of the data slot to empty.</param>
public static void FreeNamedDataSlot(string name)
{
threadStorage.FreeNamedDataSlot(name);
}
}
}
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