private static <T> T attemptLoad(
            final Class<T> ofClass,
            final String className) {
        if (LOG.isLoggable(Level.FINEST)) {
            LOG.finest("Attempting service load: " + className);
        }
        Level level;
        Throwable thrown;
        try {
            Class<?> clazz = Class.forName(className);
            if (!ofClass.isAssignableFrom(clazz)) {
                if (LOG.isLoggable(Level.WARNING)) {
                    LOG.warning(clazz.getName() + " is not assignable to "
                            + ofClass.getName());
                }
                return null;
            }
            return ofClass.cast(clazz.newInstance());
        } catch (LinkageError ex) {
            level = Level.FINEST;
            thrown = ex;
        } catch (ClassNotFoundException ex) {
            level = Level.FINEST;
            thrown = ex;
        } catch (InstantiationException ex) {
            level = Level.WARNING;
            thrown = ex;
        } catch (IllegalAccessException ex) {
            level = Level.WARNING;
            thrown = ex;
        }
        LOG.log(level,
                "Could not load " + ofClass.getSimpleName()
                + " instance: " + className,
                thrown);
        return null;
    }