A simple project that changes a message from hello to goodbye using Drools (simplified version of the canonical Drools example)
A reimagined Java Pet Store, using Drools to calculate things like discounts, warnings, and sales tax. Refactored and expanded based on use cases defined in canonical Drools example.
- When purchasing freshwater and saltwater fish, warn customer about housing in separate tanks.
- When purchasing new cat, remind customer to purchase cat food.
- When purchasing new dog and no dog food purchased, add a free sample of dog food to order.
- When purchasing 3 or more fish, get third fish for free.
- When purchasing 10 or more fish, get free aquarium
- If customer is in Illinois, apply a 6.25% state sales tax.
- If customer is in Chicago and order is before January 1, 2016, apply an additional 3% local sales tax.
- If customer is in Chicago and order is after January 1, 2016, apply an additional 4% local sales tax.
The below demo shows the pet store Rules engine in action. Chicago-based customer buys the following on January 14, 2016:
- 10 Goldfish
- 2 Clownfish
- 1 Poodle
- 1 Cube Aquarium
After adding the order to the rules engine, the following information is applied to the order:
- Add a free sample bag of Blue Buffalo Lamb & Brown Rice to order and provide a 100% discount.
- Add a note about housing freshwater and saltwater fish in separate tanks.
- Apply a 50% discount on Cube Aquarium.
- Apply a 100% discount to the least expensive fish purchased.
- Apply a state sales tax of 6.25%.
- Apply a local sales tax (at the new higher Chicago rate) of 4%.
