1. Introduction
- Introduction to course
- What is a Rule Engine?
- How to Design Rules and When (not) to Use Drools.
- Introduction to Drools Language Syntax
2. Example Code and Running it Locally
- Structure of Example Code
- Get example code running with IntelliJ IDEA Community Edition
- Get example code running with Eclipse
3. Stateless Sessions
- Introduction to Stateless Sessions
- Step1: First two rules to validate passports
- Step2: Split a rule
- Step3: Bind a variable
- Step4: Using the bound variable
- Steps 5 and 6: Avoid repetitions
- Stateless Sessions Summary
4. Stateful Sessions
- Introduction to Stateful Sessions
- Step1: Modify Object in the Middle of Session
- Step2: Inference
- Stateful Sessions Summary
5. Cross Products - Drools Version of SQL JOIN
- Introduction to Cross Products
- Step1: Join Visa Application to a Passport
- Fixed a bug in upcoming lecture
- Step2: Is Passport Valid 6 Months After Trip?
- Step3: When setting a value check that property is not already with this value
- Pattern Matching and Cross Products Summary
6. Insert New Facts and Determine Execution Order
- Intro to Adding New Facts & Setting Execution Order
- Step1: Create a New Fact and Insert it into the Session
- Step2: Control Execution Order with Salience
- Step3: Control Execution Order with Agenda-Groups
- Step4: Use Agenda Groups with Salience
- Step5: Run a Singe Rule from a Activation Group
- Bonus Step! Step 6. Set Focus to Agenda Group In Drools Rule.
- Summary of Adding Facts and Setting Execution Order
7. Insert a Fact Logically. Check That a Fact Does Not Exist.
- Introduction to Logical Insertion of Facts and Checking the Fact Does Not Exist
- Step1: Add Fact Using insertLogical()
- Using optional "this" keyword in left-hand-side of MVEL rules
- Step2: Create Fact Objects and Check that Fact Does Not Exist Using not()
- Step3: Replace Changing of the Objects with Fact Objects
- Step4: Reduce the Number of Rules Needed by Eliminating Positive Cases
- Section Summary
8. Exists and Forall Conditional Elements
- Intro to working with groups of objects
- Step1: Rewrite visa application logic to support FamilyVisaApplications
- Step2: Exists keyword introduced
- Step3: Use forall to match group of objects
- Step4: Use forall to extract object from group based on min/max value
- Step5: Forall with only one expression
- Summary of Working with Groups of Facts
