Buenos Aires Drools Expert Presentation

2. The system goes online on August 4th, 1997.

3. Human decisions are removed from strategic defense.

4. SkyNet begins to learn at a geometric rate.

5. It becomes self-aware at 2:14am Eastern time, August 29th

6. In a panic, they try to pull the plug.

7. And, Skynet fights back

8. Drools Vs BRMS Repository Rules and Metadata JBoss Enterprise BRMS Platform JBoss Rules Rules Engine/ Execution Rules Development & Management CEP Complex Events Jboss EWP

10. Innovation

11. Fast and Frequent Releases

12. Tested on developer environments

13. Suitable for development and prototype

14. No Patches – On to next big thing

16. Same Innovated Code + Stability

17. Stability – Includes usability, performance and security issues identified during productization

18. Certified for Multi-OS, Multi-DB

19. Best for Development and Production

20. 5 Yr lifecycle – Includes patches, updates, backward compatibility

21. SLA based full support from dedicated support engineers

22. Open Source Assurance – legal protection derived

23. JBoss Community & Enterprise Changes Community / Enterprise Platform Delta BRMS Drools Enterprise Platforms - Performance, Scalability, Security and Qualityimprove over time without compromising long-term compatibility. 08/09 12/10 03/11 05/11 Over 150+ defect fixes & 35+ OS/JVM/DB certifications (& counting) between Drools Community 5.1 & JBoss BRMS 5.1.x

25. Authoring and Management App

26. Repository

27. EAP Certified

29. Authoring and Management App

30. Choice of Repository

31. Integrated Container

32. CEP – Tech Preview

33. EAP, EWS, EWP, JVMs, Dbs and more

34. Performance Repository JBoss Enterprise BRMS Platform 5.0 JBoss Rules BRM Repository JBoss Enterprise BRMS Platform 5.1 JBoss Rules BRM CEP Jboss EWP

35. Back Up

38. History

39. Declarative Programming

41. Conditional elements

42. Timers and Calendars

43. Truth maintenance and Inference

48. 5 day event, with 2 days focus on the healthcare industry

49. OSDE, AT&T, SAIC, US Navy Research, Kaiser, Clinica, Intermountain Healthcare, GE Healthcare, VA, Boeing, Nationwide ....

51. Oh And There are Drools Books Too

53. History

60. It All Started Here Birth of CDSS 1970s 1980s Dendral Baobab Mycin Guidon Neomycin Teiresias Puff Emycin WM Sacon Centaur Wheeze Gravida Clot Oncocin

61. Because Not Everyone Is As Smart As He Is

62. Business Rules Engines 1980s 2010s 1990s 2000s OPS5 ART Clips Jess Drools 2 JRules Drools 3 Drools 4 Drools 5

65. Basic functional programming feature with “from”

66. Basic Rule Flow

68. More Advanced Rule Flow integration

72. Multi-function accumulates

73. Prolog like derivation queries

74. Decision tables and rule templates (Guvnor)

75. Pure GWT (Guvnor)

77. History

84. Integrated Systems Semantic Ontologies Rules Event Processes Workflows Rules Workflows Event Processes Semantic Ontologies

85. Integrated Systems

90. Concepts Overview

94. History

101. Classes

102. rule “increase balance for AccountPeriod Credits” when ap : AccountPeriod() acc : Account( $accountNo : accountNo ) CashFlow( type == CREDIT, accountNo == $accountNo, date >= ap.start && <= ap.end, $ammount : ammount ) then acc.balance += $amount; end select * from Account acc, Cashflow cf, AccountPeriod ap where acc.accountNo == cf.accountNo and cf.type == CREDIT cf.date >= ap.start and cf.date <= ap.end trigger : acc.balance += cf.amount Credit Cashflow Rule

103. rule “increase balance for AccountPeriod Credits” when ap : AccountPeriod() acc : Account( $accountNo : accountNo ) CashFlow( type == CREDIT, accountNo == $accountNo, date >= ap.start && <= ap.end, $ammount : ammount ) then acc.balance += $amount; end rule “decrease balance for AccountPeriod Debits” when ap : AccountPeriod() acc : Account( $accountNo : accountNo ) CashFlow( type == DEBIT, accountNo == $accountNo, date >= ap.start && <= ap.end, $ammount : ammount ) then acc.balance -= $amount; end Rules as a “view”

105. History

112. Definitions public class Applicant { private String name; private int age; private boolean valid; // getter and setter methods here } rule "Is of valid age" when $a : Applicant( age < 18 ) then modify ( $a ) { valid = false }; ends

113. Building KnowledgeBuilder kbuilder = KnowledgeBuilderFactory .newKnowledgeBuilder(); kbuilder .add( ResourceFactory .newClassPathResource( "licenseApplication.drl" , getClass() ), ResourceType.DRL ); if ( kbuilder .hasErrors() ) { System.err.println( kbuilder .getErrors().toString() ); } kbase .addKnowledgePackages( kbuilder .getKnowledgePackages() );

114. Executing StatelessKnowledgeSession ksession = kbase .newStatelessKnowledgeSession(); Applicant applicant = new Applicant ( "Mr John Smith" , 16 ); assertTrue ( applicant .isValid() ); ksession .execute( applicant ); assertFalse ( applicant .isValid() ); rule "Is of valid age" when $a : Applicant( age < 18 ) then modify ( $a ) { valid = false }; ends

116. Community

117. History

124. Definitions public class Room { private String name // getter and setter methods here } public class Sprinkler { private Room room ; private boolean on ; // getter and setter methods here } public class Fire { private Room room ; // getter and setter methods here } public class Alarm { }

125. Definitions rule "When there is a fire turn on the sprinkler" when Fire ($room : room) $sprinkler : Sprinkler ( room == $room, on == false ) then modify ( $sprinkler ) { on = true }; println ( "Turn on the sprinkler for room " + $room.name ); end rule "When the fire is gone turn off the sprinkler" when $room : Room ( ) $sprinkler : Sprinkler ( room == $room, on == true ) not Fire ( room == $room ) then modify ( $sprinkler ) { on = false }; println ( "Turn off the sprinkler for room " + $room.name ); end

126. Definitions rule "Raise the alarm when we have one or more fires" when exists Fire () then insert ( new Alarm () ); println ( "Raise the alarm" ); end rule "Cancel the alarm when all the fires have gone" when not Fire () $alarm : Alarm () then retract ( $alarm ); println ( "Cancel the alarm" ); end

127. Definitions rule "Status output when things are ok" when not Alarm () not Sprinkler ( on === true ) then println ( "Everything is ok" ); end

128. Executing String [] names = new String []{ "kitchen" , "bedroom" , "office" , "livingroom" }; Map < String , Room > name2room = new HashMap < String , Room >(); for ( String name : names ){ Room room = new Room ( name ); name2room .put( name , room ); ksession .insert( room ); Sprinkler sprinkler = new Sprinkler ( room ); ksession .insert( sprinkler ); } ksession .fireAllRules() > Everything is ok

129. Executing Fire kitchenFire = new Fire ( name2room.get( "kitchen" ) ); Fire officeFire = new Fire ( name2room.get( "office" ) ); FactHandle kitchenFireHandle = ksession .insert( kitchenFire ); FactHandle officeFireHandle = ksession .insert( officeFire ); ksession .fireAllRules(); > Raise the alarm > Turn on the sprinkler for room kitchen > Turn on the sprinkler for room office

130. Executing ksession .retract( kitchenFireHandle ); ksession .retract( officeFireHandle ); ksession .fireAllRules() > Turn off the sprinkler for room office > Turn off the sprinkler for room kitchen > Cancel the alarm > Everything is ok rule "Status output when things are ok" when not Alarm () not Sprinkler ( on === true ) then println ( "Everything is ok" ); end

132. History

139. not Bus( color = “red” ) Conditional Elements exists Bus( color = “red” ) forall ( $bus : Bus( floors == 2 ) Bus( this == $bus, color == “red” ) ) forall ( $bus : Bus( color == “red” ) )

140. Accumulate CE rule "accumulate" when $sum : Number( intValue > 100 ) from accumulate ( Bus( color == "red" , $t : takings ) sum( $t ) ) then print "sum is “ + $sum; end

141. Accumulate CE Patterns and CE's can be chained with ' from ' rule "collect" when $zipCode : ZipCode() $sum : Number( intValue > 100 ) from accumulate ( Bus( color == "red" , $t : takings ) from $hbn.getNamedQuery( “Find Buses” ) .setParameters( [ “zipCode” : $zipCode ] ) .list(), sum( $t ) ) then print "sum is “ + $sum; end

142. Aggregations Rule Engines do not deal with aggregations $n : Number( intValue > 100 ) from accumulate ( $s : StockTicker( symbol == “RHAT” ) over window:time ( 5s ), average ( $s.price ) ) Over 5 seconds Aggregate ticker price for RHAT over last 5 seconds The pattern 'Number' reasons 'from' the accumulate result

143. $c : Custumer( type == “VIP ) $oe : BuyOrderEvent( customer == $c ) from entry-point “Home Broker Stream” not BuyAckEvent( relatedEvent == $oe.id, this after[1s, 10s] $oe ) from entry-point “Stock Trader Stream” Operators Existing Drools 'not' Conditional Elements can be used to detect non-occurrence of events BackAckEvent must occur between 1s and 10s ' after' BuyOrderEvent

145. History

152. Timers rule “name” timer ( cron: 0 0/15 * * * * ) when Alarm( ) then sendEmail( ”Alert Alert Alert!!!” ) Field Name Mandatory? Allowed Values Allowed Special Characters Seconds YES 0-59 , - * / Minutes YES 0-59 , - * / Hours YES 0-23 , - * / Day of month YES 1-31 , - * ? / L W Month YES 1-12 or JAN-DEC , - * / Day of week YES 1-7 or SUN-SAT , - * ? / L # Year NO empty, 1970-2099 , - * / Send alert every quarter of an hour

153. Calendars rule "weekdays are high priority" calendars "weekday" timer (int:0 1h) when Alarm() then send( "priority high - we have an alarm” ); end rule "weekend are low priority" calendars "weekend" timer (int:0 4h) when Alarm() then send( "priority low - we have an alarm” ); end Execute now and after 1 hour duration Execute now and after 4 hour duration

155. History

162. TMS and Inference rule "Issue Child Bus Pass" when $p : Person ( age < 16 ) then insert(new ChildBusPass ( $p ) ); end rule "Issue Adult Bus Pass" when $p : Person ( age >= 16 ) then insert(new AdultBusPass ( $p ) ); end Couples the logic What happens when the Child stops being 16?

164. Leaky

165. Brittle integrity - manual maintenance

167. When the rule is no longer true, the object is retracted. when $p : Person ( age < 16 ) then logicalInsert ( new IsChild ( $p ) ) end when $p : Person ( age >= 16 ) then logicalInsert ( new IsAdult ( $p ) ) end de-couples the logic Maintains the truth by automatically retracting

168. TMS and Inference rule "Issue Child Bus Pass" when $p : Person ( ) IsChild ( person =$p ) then logicalInsert ( new ChildBusPass ( $p ) ); end rule "Issue Adult Bus Pass" when $p : Person ( age >= 16 ) IsAdult ( person =$p ) then logicalInsert ( new AdultBusPass ( $p ) ); end The truth maintenance cascades

169. TMS and Inference rule "Issue Child Bus Pass" when $p : Person ( ) not ( ChildBusPass ( person == $p ) ) then requestChildBusPass( $p ); end The truth maintenance cascades

171. Encapsulate knowledge

172. Provide semantic abstractions for those encapsulation

173. Integrity robustness – truth maintenance

175. History

182. Backward Chaining query isChild( Person p ) $p : Person ( age <= 16 ) end rule "Issue Child Bus Pass" when $p : Person ( ) ?isChild ( $p ) then logicalInsert ( new ChildBusPass ( $p ) ); end

183. Backward Chaining query isContainedIn( String x, String y ) Location ( x, y; ) or ( Location ( z, y; ) and ?isContainedIn ( x, z; ) ) end rule reactiveLook when Here ( place : place) ?isContainedIn ( place, "keys" ; ) then System.out.println( "We have found your keys" ); end

185. History

193. Optimistic backward chaining.

194. Business Semantics (ontologies)

195. Simulation Testing

196. High Availability

197. Distributed (Grid) platform

198. Runtime Management

199. BAM

201. HAL : Without your space helmet, Dave, you're going to find that rather difficult.

202. Dave Bowman : HAL, I won't argue with you anymore! Open the doors!

203. HAL : Dave, this conversation can serve no purpose anymore. Goodbye. Joshua: Greetings, Professor Falken. Stephen Falken : Hello, Joshua. Joshua: A strange game. The only winning move is not to play. How about a nice game of chess?

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