Contents

Title and Copyright Information

Preface

• Audience
• Documentation Accessibility
• Related Documents
• Conventions

1 Rules Programming Concepts

• 1.1 Starting the Oracle Business Rules RL Language Command-Line
• 1.2 Introducing Rules and Rulesets
  • 1.2.1 Rule Conditions
  • 1.2.2 Rule Actions
• 1.3 Introducing Facts and RL Language Classes
  • 1.3.1 What Are Facts?
  • 1.3.2 Adding Facts to Working Memory with Assert
  • 1.3.3 Using RL Language Classes as Facts
  • 1.3.4 Using Java Classes as Facts
• 1.4 Understanding and Controlling Rule Firing
  • 1.4.1 Rule Activation and the Agenda
  • 1.4.2 Watching Facts, Rules, and Rule Activations
    • 1.4.2.1 Watching and Showing Facts in Working Memory
    • 1.4.2.2 Watching Activations and Rule Firing
  • 1.4.3 Ordering Rule Firing
• 1.5 Using Effective Dates
• 1.6 Integrating RL Language Programs with Java Programs
  • 1.6.1 Using Java Beans Asserted as Facts
  • 1.6.2 Using RuleSession Objects in Java Applications
• 1.7 Using Decision Tracing
  • 1.7.1 Introduction to Rule Engine Level Decision Tracing
  • 1.7.2 Using Rule Engine Level Decision Tracing
  • 1.7.3 Decision Trace Samples for Production and Development Level Tracing
• 1.8 Building a Coin Counter Rules Program

2 Rule Language Reference

• Ruleset
• Types
• Identifiers
• Literals
• Definitions
  • Variable Definitions
    • Global Variables
  • Rule Definitions
  • Class Definitions
    • xpath Support
  • Function Definitions
• Fact Class Declarations
• Import Statement
• Include Statement
• Using Expressions
  • Boolean Expressions
  • Numeric Expressions
  • String Expressions
  • Array Expressions
  • Fact Set Expressions
  • Comparable Expression
  • Object Expressions
  • Primary Expressions
    • new
• Actions and Action Blocks
  • If Else Action Block
  • While Action Block
  • For Action Block
  • Try Catch Finally Action Block
  • Synchronized Action Block
  • Modify Action
  • Return Action
  • Throw Action
  • Assign Action
  • Increment or Decrement Expressions
  • Primary Actions
• Rulegroup
• Built-in Functions
  • assert
  • assertTree
  • assertXPath
  • clearRule
  • clearRulesetStack
  • clearWatchRules, clearWatchActivations, clearWatchFacts, clearWatchFocus, clearWatchCompilations, clearWatchAll
  • contains
  • getCurrentDate
  • getDecisionTrace
  • getDecisionTraceLevel
  • getDecisionTraceLimit
  • getEffectiveDate
  • getFactsByType
  • getRulesetStack
  • getRuleSession
  • getStrategy
  • halt
  • id
  • object
  • println
  • popRuleset
  • pushRuleset
  • retract
  • reset
  • run
  • runUntilHalt
  • setCurrentDate
  • setDecisionTraceLevel
  • setDecisionTraceLimit
  • setEffectiveDate
  • setRulesetStack
  • setStrategy
  • showActivations
  • showFacts
  • step
  • watchRules, watchActivations, watchFacts, watchFocus, watchCompilations

3 Using the Command-line Interface

• 3.1 Starting and Using the Command-Line Interface
• 3.2 RL Command-Line Options
• 3.3 RL Command-Line Built-in Commands
  • 3.3.1 Clear Command
  • 3.3.2 Exit Command

4 Using a RuleSession

• 4.1 RuleSession Constructor Properties
• 4.2 RuleSession Methods
• 4.3 RL to Java Type Conversion
• 4.4 Error Handling
• 4.5 RL Class Reflection
• 4.6 XML Navigation
• 4.7 Obtaining Results from a Rule Enabled Program
  • 4.7.1 Overview of Results Examples
  • 4.7.2 Using External Resources to Obtain Results
• 4.8 Debugging an RL Stacktrace
• 4.9 Using RuleSession Pooling
  • 4.9.1 How to Create a RuleSession Pool
  • 4.9.2 How to Use a RuleSession Pool
• 4.10 Using RuleSession Options
  • 4.10.1 Using the CFG_LOGGING System Property
  • 4.10.2 Using the CFG_DECISION_TRACE_LEVEL Option
  • 4.10.3 Using the CFG_DECISION_TRACE_LIMIT Option

A Summary of Java and RL Differences

• A.1 RL Differences from Java

Index