[Asp.net 5] Caching-缓存架构与源码分析

internal static class EntryLinkHelpers
{
private const string ContextLinkDataName = "EntryLinkHelpers.ContextLink";

public static EntryLink ContextLink
{
get
{
var handle = CallContext.LogicalGetData(ContextLinkDataName) as ObjectHandle;

if (handle == null)
{
return null;
}

return handle.Unwrap() as EntryLink;
}
set
{
CallContext.LogicalSetData(ContextLinkDataName, new ObjectHandle(value));
}
}

internal static IEntryLink CreateLinkingScope()
{
var parentLink = ContextLink;
var newLink = new EntryLink(parent: parentLink);
ContextLink = newLink;
return newLink;
}

internal static void DisposeLinkingScope()
{
var currentLink = ContextLink;
var priorLink = ((EntryLink)currentLink).Parent;
ContextLink = priorLink;
}
}