Thx for the fix! Having a look at the [CloudStack docs](http://cloudstack-administration.readthedocs.org/en/latest/usage.html#disk-volume-usage-record-format), it seems that the *size* field is not returned in all usage types. I'm not very familiar with the CloudStack provider, but if I'm not wrong, the current implementation reuses the UsageRecord entity for all types, so the *size* field could actually be null in some cases. In that case, we should keep the Long object with the `@Nullable` annotation.
Can you share the issues you experienced with that approach, to see if we can fix it? --- Reply to this email directly or view it on GitHub: https://github.com/jclouds/jclouds/pull/845#issuecomment-136520689
