Hi All,

How can we do rule wise exception handling in the drools rule condition?  
My scenario is how to handle scenarios when the schema of an event changes.

For example, let's say Initially  I have an event that has 5 members namely 
name,num1,num2,num3,num4. I started creating rules for the event and the 
rule engine is running for some time. After that let's assume there is a 
scenario in which one of the class members (say num4) is removed from the 
event because of some reason. Now what I can do now is to change the Event 
class, but all the rules associated with that member will give me 
exceptions. The exceptions will also affect other rules which can run with 
the current data. Is there any way to handle exception in rule condition 
for specific rule and restrict it to disturb the independent rules.


Regards,

Bishnu Shankar Pandey

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