Andy Mei wrote:

Hi all,

Long time user of Drools (dated back in xml syntax days). We are looking to revamp our in house rules product which is based on Drools 3.x. We have built a Swing thick client that provides similar functionality as Guvnor such as rule editing, versioning, deployment (with approval system). One major feature we do have is rule simulation. We allow user to simulate rules and display results while user save or seek approval of their rules before deploy to production system. The simulation feature allows user to run against production or testing environment to ensure it provide correct results. I wonder if Guvnor has such extensibility interface build in which I could add my own functionality such as simulation and result browsing? Since Guvnor is based on Seam and GWT (i think), I could probably fork the source and tweak the UI, but I much rather code against an interface supported by Drools.

Thoughts? TIA.

PS: I am curious how are existing Drools user test their rules currently?

Guvnor has a simple scenario tester in the QA section. that allows you to run some rules against a set of data and asserting the expected results.

I'm currently working on a more complete framework, although just the backend api at the moment, for simulation and testing. I hope to have something usable in the next few days. I think the initial plan is to map it to an DSL in MVEL and also to maybe do a mapping to a spreadsheet metaphor. The simulation impl I'm doing will be very complete and allow for testing of rules, workflow and event processing. I'll blog about it once something is ready.

Not sure how this will plug into guvnor, other than the uploading and displaying of spreadsheets. One idea is to have a chronoscope time line, which displays all the steps and when they are suppose to happen. If you select a step, it shows the MVEL DSL fragment for that step which can be edited - just simple text area. After that works, we can probably work on various GUI editors for the step segments.

Mark

http://blog.athico.com Drools Blog.

Andy


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