[rules-users] global identifier

Is there a way to create a 'global' that is completely specific to a drl file rather than the working memory? I only wish to use this in rhs notification/persistence operations, ie passing a user's unique id to a db or sms operation. I know this does not work but perhaps it will help to better illustrate my question: global int user_id = 123; ... then notification.sendSMS(user_id);