title: Rules from excel in java web based applications
body: <p>I have been trying to find the right design/toolset which can help our business users. They have enormous data in excel files which they push through to various excel formulas and calculations usually and mostly on a row by row basis and vlookups from other sheets.
  In trying to design a system for them, i want to enable them to define the business rules so that we can stick to designing and implementing the system, which will change state according to the business rules defined ?
  What current stack of technologies would be able to support this ?</p>
  
  <p>So basically something like this -> we dump all their (up to 400k+ and growing) data safely assuming that all rules and formulas will be applied on a row by row basis, into a database. We setup a web-page for them to author rules. The java runtime kicks in on the rules defined to apply them on a row by row basis.</p>
  
  <p>Any design technology/design which can nearly match the computation power of excel and ease of defining rules for business analysts ? Any pointers to design/setup will be appreciated .</p>