title: how to use collection in drools guvnor?
body: <p>I would like to know how to use a collection in LHS of a rule (to be used in contains, memberof) , which can be managed in Guvnor containing big list of elements (may be tens of thousands). Take a blacklist match for an example, how can i maintain the big blacklist in guvnor very efficiently ? 
  any ideas?</p>