/// <summary>
/// Call this method to change the priority of an item.
/// Calling this method on a item not in the queue will throw an exception.
/// If the item is enqueued multiple times, only the first one will be updated.
/// (If your requirements are complex enough that you need to enqueue the same item multiple times <i>and</i> be able
/// to update all of them, please wrap your items in a wrapper class so they can be distinguished).
/// O(n)
/// </summary>
public void UpdatePriority(T item, int priority)
{
lock (_queue)
{
try
{
SimpleNode updateMe = GetExistingNode(item);
_queue.UpdatePriority(updateMe, priority);
}
catch (InvalidOperationException ex)
{
throw new InvalidOperationException("Cannot call UpdatePriority() on a node which is not enqueued: " + item, ex);
}
}
}
