apache commons FileCleanerCleanup in a portlet environment

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Hi everyone,
I have a little question to which I can't find an answer... I'd appreciate it a lot if you could help me out

The thing is, I'm trying to use the org.apache.commons.fileupload in a portlet 2.0 environment. Everything is working very well, but if I want to make sure my temporary files are cleaned properly, then according to the User Guide of fileupload, I should also use the FileCleaningTracker:

public static DiskFileItemFactory newDiskFileItemFactory(ServletContext context,
                                                             File repository) {
        FileCleaningTracker fileCleaningTracker
            = FileCleanerCleanup.getFileCleaningTracker(context);
        DiskFileItemFactory factory
            = new DiskFileItemFactory(DiskFileItemFactory.DEFAULT_SIZE_THRESHOLD,
                                      repository);
        factory.setFileCleaningTracker(fileCleaningTracker);
        return factory;
    }

Problem is, there is only org.apache.commons.fileupload.servlet.FileCleanerCleanup and no org.apache.commons.fileupload.portlet.FileCleanerCleanup, which means I can't use the PortletContext - I should find a way to extract a SessionContext...

Have you ever encountered such a problem? Could you please help me with it?

Thanks a lot in advance!