29.12. Practical Example: Business Rule Engine

Try these first

1. 1.

   What is the purpose of the Bindings object?

   Hint

   Think about what you need to do to reference Java variables in a script.

2. 2.

   What simple condition does the example script check?

   Hint

   Recall the structure of the if-else statement.

3. 3.

   What is the main purpose of the Bindings object in the context of scripting?

   • To store Java methods
   • To pass Java variables into scripts
   • To increase script execution speed

   Hint

   Think about how scripts access Java variables.

4. 4.

   True or False: The discount is fixed at 10% regardless of the order total.

   • True
   • False

   Hint

   Make sure to remember what the script checks during evaluation.

5. 5.

   Create a script that calculates a discount based on three tiers: 15% for orders above 2000, 10% for orders between 1000-2000, and 5% for orders below 1000. Implement this in a Java application.

   Hint

   Break down the conditions carefully and ensure you apply the correct logic.

6. 6.

   Implement a logging mechanism that records each discount applied based on the order total in a Java application using bindings.

   Hint

   Think about how JavaScript syntax enables printing to the console.