Advantage
- Easy to maintain the rule code
- Easy to understand
- Easy for non programmers
- Write rules in excel sheet and run it
- Better Performance
- No downtime required during change.
Disadvantage
- Learn new way of programming
- Troubleshooting is pretty tough
- Consumes more memory
When NOT to go for Drools
- When very less rules are used
- having stable business rules which dont change often.
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