I have spent several days writing rules and tests for them in Guvnor, and kept having strange results. A test would sometimes fail, repeatedly, and then finally start working after I would delete and recreate some portion of it, or change a value.
After two of us spent many hours trying to identify the extent of the
problem, we concluded the following:
1. The problem happens under both IE and Firefox.
2. The problem happens less frequently under Firefox if we install and
turn on a third-party plug-in which disables Firefox caching web pages.
3. Saving a new rule or test will allow us to work with it (edit - save -
test scenarios). However, frequently the rule or test will just disappear
once we log out.
4. A "Save" and "Check-in" will often work correctly if we cross our
fingers and do the following:
a. Save it once (the screen updates, and you can check the
version history)
b. Refresh the browser
c. Make the change again
d. Save it a second time
5. After doing a "Save" and "Check-in", you can immediately do a "view
source" and see your changes in place. However, if you then close the
test (or rule) and re-open it, you will often find that the change is
gone, and the test or rule looks like it did before you made the change.
A sample screenshot appears below. In this case, I created the test with
the "performedTime" set to 20-Sep-2008. I ran the test and it failed,
because the rule was checking for greater than or equal to 21-Sep-2008. I
then changed the date on the test to 21-Sep-2008, did a "save changes" and
a "Check-in", and then ran the scenario again.
As you can see below, the asserted object contains the date 20-Sep-2008,
even though the test clearly shows 21-Sep-2008.
Does anybody have any ideas on this? If I copy the above test into a new
test, it will often work the first time, but then it may disappear, once I
logout, even though it was saved and checked-in.
It almost seems like there is something wrong with the imbedded
repository, and / or the first running of the test created fact objects
that are persisting and being found the second time I ran the changed
test. ...
We are running the Final release of Drools Guvnor 5.1.1 found in
drools-5.1.1-guvnor.zip downloaded on 4-Sep-2010
We are running under Tomcat 6.0, with the recommended jar files replaced.
Thanks for your help!
--------------------------------------------------
David Shields
Division of Clinical Informatics
Department of Community and Family Medicine
Duke University Medical Center
Phone (864) 787-8551
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