private void ResolverThread()
{
ThumbnailParameters thumbnailParameters = null;
do
{
lock (m_resourcesToResolve)
{
if (m_resourcesToResolve.Count > 0)
{
thumbnailParameters = m_resourcesToResolve.Dequeue();
}
else
{
thumbnailParameters = null;
}
}
if (thumbnailParameters != null)
{
lock (m_resolvers)
{
object thumbnailImage = null;
foreach (var resolver in m_resolvers)
{
try
{
thumbnailImage = resolver.Resolve(thumbnailParameters);
if (thumbnailImage != null)
{
// Add it to the resolved queue
lock (m_resolvedResources)
{
m_resolvedResources.Enqueue(new ResolvedThumbnail(thumbnailParameters.Source, thumbnailImage));
}
break;
}
}
catch (Exception ex)
{
Outputs.WriteLine(OutputMessageType.Warning, ex.Message);
}
}
// Signal that no resolver managed to generate the image
if (thumbnailImage == null)
{
lock (m_resolvedResources)
{
m_resolvedResources.Enqueue(new ResolvedThumbnail(thumbnailParameters.Source, thumbnailImage));
}
}
}
}
}while (thumbnailParameters != null);
}
/// <summary>
/// Resolves the Resource into a path to a thumbnail image file using a background thread</summary>
/// <param name="resourceUri">URI of the resource to resolve</param>
public void ResolveThumbnail(ThumbnailParameters resourceUri)
{
// Push the resource onto the resolve queue
lock (m_resourcesToResolve)
{
m_resourcesToResolve.Enqueue(resourceUri);
}
if (!IsThreadAlive())
{
StartThread();
}
}
/// <summary>
/// Resolves the Resource into a path to a thumbnail image file</summary>
/// <param name="resourceUri">URI of the resource to resolve</param>
/// <returns>Path to thumbnail image file</returns>
public object ResolveThumbnailBlocking(ThumbnailParameters resourceUri)
{
object thumbnailImage = null;
foreach (IThumbnailResolver resolver in m_resolvers)
{
thumbnailImage = resolver.Resolve(resourceUri);
if (thumbnailImage != null)
{
break;
}
}
return(thumbnailImage);
}
/// <summary>
/// Resolves the Resource into a path to a thumbnail image file using a background thread</summary>
/// <param name="resourceUri">URI of the resource to resolve</param>
public void ResolveThumbnail(ThumbnailParameters resourceUri)
{
// Push the resource onto the resolve queue
lock (m_resourcesToResolve)
{
m_resourcesToResolve.Enqueue(resourceUri);
}
if (!IsThreadAlive())
{
StartThread();
}
}
/// <summary>
/// Resolves the Resource into a path to a thumbnail image file</summary>
/// <param name="resourceUri">URI of the resource to resolve</param>
/// <returns>Path to thumbnail image file</returns>
public object ResolveThumbnailBlocking(ThumbnailParameters resourceUri) {
object thumbnailImage = null;
foreach (IThumbnailResolver resolver in m_resolvers)
{
thumbnailImage = resolver.Resolve(resourceUri);
if (thumbnailImage != null)
{
break;
}
}
return thumbnailImage;
}
