private void ProcessRequests()
{
while (true)
{
// wait for an artwork request
iPendingRequests.Wait();
// get the first request in the queue - leave the request in the queue for now so that if
// the main thread requests it again, it will not get re-added and downloaded again
string uri;
ScalingUriConverter uriConverter;
lock (iLock)
{
uri = iPendingRequests.FirstRequest;
uriConverter = iUriConverter;
}
// download the image
NSAutoreleasePool pool = new NSAutoreleasePool();
pool.Init();
UIImage image = null;
try
{
string requestUri = uri;
if (uriConverter != null)
{
requestUri = uriConverter.Convert(uri);
}
NSData data = NSData.FromUrl(NSUrl.FromString(requestUri));
image = ImageToFitSize(new UIImage(data), new CGSize(kDownscaleSize, kDownscaleSize));
}
catch (Exception e)
{
UserLog.WriteLine("ArtworkCache.ProcessRequests: " + uri + " (" + e.Message + ")");
}
pool.Dispose();
// insert the image into the cache
List <Item> staleItems;
lock (iLock)
{
// add to the cache
Item item = new Item(uri, image);
staleItems = iCacheData.Add(item);
// remove the request
iPendingRequests.Remove(uri);
}
// send notification that the image was added to the cache
if (EventImageAdded != null)
{
EventImageAdded(this, new EventArgsArtwork(uri));
}
// clean up all stale items outside of the lock
foreach (Item item in staleItems)
{
if (item.Image != null)
{
item.Image.Dispose();
}
}
}
}
private void ProcessRequests()
{
while (true)
{
// wait for an artwork request
iPendingRequests.Wait();
// get the first request in the queue - leave the request in the queue for now so that if
// the main thread requests it again, it will not get re-added and downloaded again
string uri;
ScalingUriConverter uriConverter;
lock (iLock)
{
uri = iPendingRequests.FirstRequest;
uriConverter = iUriConverter;
}
Trace.WriteLine(Trace.kKinskyDesktop, "ArtworkCache requesting " + uri);
// download the image
NSAutoreleasePool pool = new NSAutoreleasePool();
pool.Init();
NSImage image = null;
try
{
string requestUri = uri;
if (uriConverter != null)
{
requestUri = uriConverter.Convert(requestUri);
}
NSString s = NSString.StringWithUTF8String(Uri.UnescapeDataString(requestUri));
NSURL url = NSURL.URLWithString(s.StringByAddingPercentEscapesUsingEncoding(NSStringEncoding.NSUTF8StringEncoding));
image = new NSImage(url);
}
catch (Exception e)
{
UserLog.WriteLine("ArtworkCache.ProcessRequests: " + uri + " (" + e.Message + ")");
}
pool.Release();
// insert the image into the cache
List <Item> staleItems;
lock (iLock)
{
// add to the cache
Item item = new Item(uri, image);
staleItems = iCacheData.Add(item);
// remove the request
iPendingRequests.Remove(uri);
}
// send notification that the image was added to the cache
if (EventImageAdded != null)
{
EventImageAdded(this, new EventArgsArtwork(uri));
}
// clean up all stale items outside of the lock
foreach (Item item in staleItems)
{
if (item.Image != null)
{
item.Image.Release();
}
}
}
}