[rules-users] advice on fact loading through database using globals

Hi all, I am about to start a new project here using Drools and in order to better understand it I am reading the developer's guide book written by Michal Bali. During my readings, one thing caught my attention, on page 26 of the book the author mentions: "Use the global variable in a rule condition or a consequence. If used in a condition, they must return a time-constant value while the rule session is active." And that's exactly one of the things our application will need to do since we'll be checking events against facts stored in a database. One interesting thing is that it turns out that the architecture we had in mind is exactly what is described on the page 192 of the book, services that would be registered as globals would be responsible for accessing database and augmenting the facts on knowledge sessions when necessary. But... if we take the restriction mentioned on page 26 into consideration we would have to open a new session for each event received (and close it after). I am pretty sure this isnt much smart not to mention that it kills any chance of using capabilities introduced by Fusion. Is there any other approach we could take to achieve this ? best regards, Rafael Ribeiro