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Contents

List of Tables

Title and Copyright Information

Preface

• Audience
• Documentation Accessibility
• Related Documents
• Conventions
  • Conventions in Text
  • RL Language Backus-Naur Form Grammar Rules

What's New in This Guide

• New and Changed Features for 12c (12.1.3)

1 Rules Programming Concepts

• Differences Between Using this Component in the Cloud and On-Premises Environments
• Starting the Oracle Business Rules RL Language Command-Line
• Introducing Rules and Rulesets
  • Rule Conditions
  • Rule Actions
• Introducing Facts and RL Language Classes
  • What Are Facts?
  • Adding Facts to Working Memory with Assert
  • Using RL Language Classes as Facts
  • Using Java Classes as Facts
• Understanding and Controlling Rule Firing
  • Rule Activation and the Agenda
  • Watching Facts, Rules, and Rule Activations
    • Watching and Showing Facts in Working Memory
    • Watching Activations and Rule Firing
  • Ordering Rule Firing
    • Ordering Rule Firing
• Using Effective Dates
• Integrating RL Language Programs with Java Programs
  • Using Java Beans Asserted as Facts
    • Sample RL Language Program
    • Working with Java Beans as Facts
  • Using RuleSession Objects in Java Applications
• Building a Coin Counter Rules Program

2 Rules Engine Algorithms

• Overview
  • Differences between Rete and NRE Algorithm
• Configuring the Non-Rete Algorithm

3 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
  • getFactByType
  • getFactsByType
  • getRulesetStack
  • getRuleSession
  • getStrategy
  • halt
  • id
  • isErrorInRuleConditionSuppressed
  • isRulesetsOnStackOnce
  • object
  • println
  • popRuleset
  • pushRuleset
  • retract
  • reset
  • run
  • runUntilHalt
  • setCurrentDate
  • setDecisionTraceLevel
  • setDecisionTraceLimit
  • setEffectiveDate
  • setErrorInRuleConditionSuppressed
  • setRulesetStack
  • setRulesetsOnStack
  • setStrategy
  • showActivations
  • showFacts
  • step
  • watchRules, watchActivations, watchFacts, watchFocus, watchCompilations

4 Using the Command-line Interface

• Starting and Using the Command-Line Interface
  • Using Command-Line Input Processing
• RL Command-Line Options
• RL Command-Line Built-in Commands
  • Clear Command
  • Exit Command

5 Using a RuleSession

• RuleSession Constructor Properties
• RuleSession Methods
• RL to Java Type Conversion
• Error Handling
• RL Class Reflection
• Obtaining Results from a Rule Enabled Program
  • Overview of Results Examples
  • Using External Resources to Obtain Results
• Debugging an RL Stacktrace
• Using RuleSession Pooling
  • How to Create a RuleSession Pool
  • How to Use a RuleSession Pool
• Using RuleSession Options
  • Using the CFG_LOGGING System Property
  • Using the CFG_DECISION_TRACE_LEVEL Option
  • Using the CFG_DECISION_TRACE_LIMIT Option
• Using Decision Tracing
  • Introduction to Rule Engine Level Decision Tracing
  • Using Rule Engine Level Decision Tracing
    • Setting Decision Trace Level
  • Decision Trace Samples for Production and Development Level Tracing
  • Sample Development Level DecisonTrace

A Summary of Java and RL Differences

• RL Differences from Java