public void Show(LibraryViewNode node)
{
try
{
if (node is LibraryFileNode)
{
using (var guard = new MultiGuard(1))
{
IClaim newBinary;
guard.Accept(newBinary = _binariesCache.GetBinary(node.Id));
if (newBinary != null)
{
ChangeClaim(newBinary);
guard.Commit();
LoadImage(newBinary.Binary);
}
}
}
else
{
Image = null;
}
}
// ReSharper disable once EmptyGeneralCatchClause
catch
{
}
}
public void ExcessItemsAreRemovedFromCacheWhenClaimsAreReleased()
{
using (var mg = new MultiGuard())
{
_items.Take(10).Select(i => mg.Accept(_cache.GetBinary(i.Id))).ToList();
}
Assert.That(_cache.NumItems, Is.EqualTo(CacheCapacity));
}
public void CacheBecomesOversizedIfClaimsExceedCapacity()
{
using (var mg = new MultiGuard())
{
var claims = _items.Take(10).Select(i => mg.Accept(_cache.GetBinary(i.Id))).ToList();
Assert.That(_cache.NumItems, Is.EqualTo(claims.Count));
}
}
public void UnclaimedItemsAreDiscardedToMakeRoomForNewClaims()
{
using (var mg = new MultiGuard())
{
_items.Take(CacheCapacity).Select(i => mg.Accept(_cache.GetBinary(i.Id))).ToList();
}
//cache is now full of unclaimed items. In order to load the last one, an old one needs to be discarded.
using (_cache.GetBinary(_items.Last().Id))
Assert.That(_cache.NumItems, Is.EqualTo(CacheCapacity));
}
public void TwoClaimsCreateAClaimCountOfTwo()
{
using (var mg = new MultiGuard())
{
_items.Take(CacheCapacity).Select(i => mg.Accept(_cache.GetBinary(i.Id))).ToList();
var guid = _items.Last().Id;
using (_cache.GetBinary(guid))
{
//cache is now oversize - claim and release the same item again. the cache should stay oversized
using (_cache.GetBinary(guid))
{
}
Assert.That(_cache.NumItems, Is.EqualTo(CacheCapacity + 1));
}
}
}
public void ItemsAreReleasedWhenAllClaimsAreDisposed()
{
using (var mg = new MultiGuard())
{
_items.Take(CacheCapacity).Select(i => mg.Accept(_cache.GetBinary(i.Id))).ToList();
var guid = _items.Last().Id;
using (_cache.GetBinary(guid))
{
//cache is now oversize - claim and release the same item again. the cache should stay oversized
using (_cache.GetBinary(guid))
{
}
}
//cache should now be full (there are still enough claims to keep it full, so the only one released will be the double claimed one)
Assert.That(_cache.NumItems, Is.EqualTo(CacheCapacity));
}
}
