> +import com.google.common.collect.Lists;
> +import com.google.common.util.concurrent.FutureCallback;
> +import com.google.common.util.concurrent.Futures;
> +import com.google.common.util.concurrent.ListenableFuture;
> +import com.google.common.util.concurrent.ListeningExecutorService;
> +import com.google.common.util.concurrent.MoreExecutors;
> +
> +/**
> + * Upload an entire directory and all of its sub-directories to a Cloud 
> Files container. The local directory hierarchy
> + * will be mimicked as pseudo-hierarchical directories 
> (http://j.mp/rax-hier) within the container. This is a great
> + * way to upload content for a static website (http://j.mp/rax-static).     
> + * 
> + * @author Everett Toews
> + */
> +public class UploadDirectoryToCDN implements Closeable {
> +   public static int THREADS = 10;

Make configurable, e.g. a `System.getProperty` with a default?

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