public override IEnumerable <CacheItemInfo> GetItems(string uniqueName)
{
CacheItemInfo item;
if (_cache.TryGetValue(uniqueName, out item))
{
return(new CacheItemInfo[] { item });
}
// find the directory.
//
var dir = FileItem.DirectoryHash(uniqueName);
if (IsoStore.DirectoryExists(dir))
{
lock (LockObject) {
string[] files = null;
try
{
files = IsoStore.GetFileNames(dir + "\\*");
}
catch (IsolatedStorageException)
{
// intermittent IsoStore exceptions on shutdown.
files = new string[0];
}
List <CacheItemInfo> items = new List <CacheItemInfo>();
foreach (var f in files)
{
CacheItemInfo cii = FileItem.FromFileName(f);
if (cii != null)
{
items.Add(cii);
}
}
var orderedItems = from i in items
where i.UniqueName == uniqueName
orderby i.ExpirationTime descending
select i;
foreach (var i in orderedItems)
{
if (item == null)
{
item = i;
continue;
}
Delete(i);
}
if (item != null)
{
_cache[uniqueName] = item;
return(new CacheItemInfo[] { item });
}
}
}
return(new CacheItemInfo[0]);
}
