[rules-users] Drools Decision Table

Hi, I'm doing a POC on drools decision table. We need to develope pricing engine for few of our products. I created xls with list of products and their price as per drools format. When I load xls and run the rules, the price were picked up correctly against mathing product, customer and quantity criteria. Now I want to save the executed rule so the if there is any modification in quantity (increase/decrease), I can calculate the price again based on earlier executed rule and not from xls. I think to achieve the, I need to store the "rule" against every order for each product. Can any one suggest me, how I can get the string representation of the executed rule so that I can create .drl file from that string and run the same rule again for any order modification. I've looked at SpreadsheetCompiler and was able to get the string of all the rules as a result of compile method. Note - I can not read xls again for order modification because, if in between the price in xls has changed, the engine should still pick the old price. Thanks, Riyaz