/// <summary>
/// Operation to perform the next differing traversal style
/// </summary>
/// <param name="cache"></param>
/// <param name="link"></param>
/// <returns></returns>
private string nextDifferingDequeue(WebCache cache, string link)
{
if (cache.getLatestWebsite() == null)
{
return(link);
}
Random random = new Random();
// swap up until half nodes have been traversed
int val = random.Next(webpageUrlQueue.size() / 2) + 1;
Uri last = new Uri(cache.getLatestWebsite().getUrl());
Uri newest = null;
bool foundDiffering = false;
while (val > 0 && webpageUrlQueue.size() > 0 && foundDiffering == false)
{
val--;
// swap to new site
if (!webpageUrlQueue.tryRelease(out link))
{
continue;
}
// create uri and check that the current dequeued link is different than current
if (Uri.TryCreate(link, UriKind.Absolute, out newest))
{
// if the domains/hosts differ, use it
string newURL = newest.Authority;
string oldURL = last.Authority;
if (newURL.Equals(oldURL) == false)
{
foundDiffering = true;
}
}
webpageUrlQueue.add(link);
}
return(link);
}