Drools JBoss Rules 5.0 Developer's Guide Table Of Contents

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Table of Contents

Preface
Chapter 1: Introduction
Chapter 2: Basic Rules
Chapter 3: Validation
Chapter 4: Data Transformation
Chapter 5: Human-readable Rules
Chapter 6: Stateful Session
Chapter 7: Complex Event Processing
Chapter 8: Drools Flow
Chapter 9: Sample Application
Chapter 10: Testing
Chapter 11: Integration
Chapter 12: Performance
Appendix A: Development Environment Setup
Appendix B: Custom Operator
Appendix C: Dependencies of Sample Application
Index

• Preface

• Chapter 1: Introduction
  • Problems with traditional approaches
  • The solution
    • Advantages
    • Disadvantages
      • When not to use a rule engine
  • Drools
  • Alternatives to Drools
  • Summary

• Chapter 2: Basic Rules
  • Rule basics
    • Executing rules
  • Rule syntax
    • Rule concepts
      • Variables in rules
      • Types
      • Comments
    • Package
      • Imports
      • Global variables
      • Functions
      • Dialect
    • Rule condition
      • And
      • Or
      • Not
      • Exists
      • Eval
      • Return value restriction
      • Inline eval
      • This
      • Working with collections
    • Rule consequence
    • Rule attributes
      • salience (priority)
      • No-loop
      • Dialect
  • Summary

• Chapter 3: Validation
  • Banking domain model
  • Problem definition
  • Analysis
  • Design
  • Validation package
    • Object required type rules
    • Testing
    • Minimal account balance rule
    • Student account rule
    • Unique account number rule
  • Implementation
  • Validation service
  • Summary

• Chapter 4: Data Transformation
  • Process overview
  • Getting the data
    • Loading facts into the knowledge session
  • Writing transformation rules
    • Testing
    • Address normalization
    • Testing the findAddress rule
    • Unknown country
    • Currency conversion
    • One account allowed
  • Transformation results
  • Implementation of the data loading
    • Database setup
    • Project setup
    • iBatis configuration
    • Running iBatis
    • Alternative data loading
  • Summary

• Chapter 5: Human-readable Rules
  • Domain Specific Language
    • DSL as an interface
    • DSL for validation rules
    • File formats
      • DSL file format
      • DRL file format
      • DSLR file format
    • DSL for multiple constraints in a condition
    • Named capture groups
    • DSL for data transformation rules
  • Decision tables
    • Advantages of a decision table
    • Disadvantages of a decision table
    • Calculating the interest rate
      • Project setup
      • Testing
      • Comma Separated values
    • Rule Templates
  • Drools Flow
    • Drools Agenda
    • Methods for managing rule execution order
    • Ruleflow
      • Start
      • End
      • Action
      • RuleFlowGroup
      • Split
      • Join
    • Example
    • Rules
    • KnowledgeBase setup
    • Tests
  • Summary

• Chapter 6: Stateful Session
  • Introduction to stateful session
  • Validation using stateful session
    • Design overview
    • Stateful validation service
    • Integration testing
    • Logical assertions
    • Keeping the validation report up-to-date
      • Collect conditional element
    • Serialization
      • Knowledge session re-creation
      • Testing
      • Session serialization
      • Full session serialization
  • Summary

• Chapter 7: Complex Event Processing
  • CEP and ESP
  • Drools Fusion
  • Fraud detection
    • Problem description
    • Design and modeling
    • Fraud detection rules
      • Notification
      • Monitoring—averageBalanceQuery
      • Two large withdrawals
      • Sequence of increasing withdrawals
      • High activity
  • Summary

• Chapter 8: Drools Flow
  • Loan approval service
    • Model
  • Loan approval ruleflow
    • Invalid loan application form
      • Email work item
      • Fault node
    • The size of the loan
      • Test for a small loan
    • Rating Calculation
      • Subflow
      • Subflow diagram
      • Rating calculation subflow test
    • Decisions on rating
      • Testing the 'Rating?' node
    • Transfer Funds work item
      • Work item definition
      • Work item registration
      • Work item handler
      • Work item handler registration
      • Testing the transfer work item
    • Human task
      • Test for the human task
    • Final Approval
      • Test for the 'Approve Event' node
    • Banking service
    • Disadvantages of a ruleflow
  • Summary

• Chapter 9: Sample Application
  • Users
  • Architecture
  • Technologies used
    • Additional Drools projects used
      • Libraries used
  • Business logic
  • Design
  • Configuration
    • JPA annotations for domain objects
    • JPA configuration
    • Spring Framework configuration
    • Web application setup
      • Tag library
    • Tomcat setup
    • Deployment
  • Repositories
  • Validation
    • Services
    • Transactions
    • Presentation layer
      • Localized messages
      • Customer save form controller
    • Complex Event Processing service
  • Loan approval
    • Loan request form
    • Process persistence
    • Task list
    • Working on a task
    • Loan approval event
  • Summary

• Chapter 10: Testing
  • How to write unit tests for rules
  • Rule integration testing
  • Rule acceptance testing
    • Creating a test scenario
    • Running a test scenario
    • Running all test scenarios
  • Static analysis of rules
  • Troubleshooting techniques
    • Event listeners
    • Debugging
    • Source of generated classes
    • mvel tricks

• Summary

• Chapter 11: Integration
  • Dynamic KnowledgeBase loading
    • KnowledgeAgent
  • External artifact building
    • Building with Ant
  • Drools execution server
    • Interest rate calculation example
      • The server
      • The client
  • Spring Framework integration
    • KnowledgeBaseFactoryBean
  • Standards
    • JSR94 Java Rule Engine API
  • Summary

• Chapter 12: Performance
  • Rete algorithm
    • Node types
      • Rete node
      • EntryPointNode
      • ObjectTypeNode
      • AlphaNode
      • LeftInputAdapterNode
      • TerminalNode
      • BetaNode
      • More complex example
      • EvalNode and FromNode
    • Retracting or modifying a fact
    • Initial fact
  • Node sharing
    • Example
  • Node indexing
    • AlphaNode indexing
      • Computation complexity
    • BetaNode indexing
      • Example
  • KnowledgeBase partitioning
    • Parallel execution
  • Summary

• Appendix A: Development Environment Setup
  • Environment setup
    • Dependencies and their licenses

• Appendix B: Custom Operator
  • Summary

• Appendix C: Dependencies of Sample Application

• Index

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