Droolsand Rule Based Systems 2008 Srping

Drools and Rule Based Systems Srinath Perera

Rule Engine ,[object Object],[object Object],[object Object],[object Object],[object Object]

Rules ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Production Systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Why rule engines? ~[1],[2][3] ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

When not to use rule engines? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Drools ,[object Object],[object Object],[object Object],[object Object],[object Object]

Patterns ,[object Object],[object Object],[object Object],[object Object]

OR, AND, eval() ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Not ,[object Object],[object Object],[object Object],[object Object]

For all ,[object Object],[object Object]

Exists ,[object Object],[object Object],[object Object],rule “FamilyMembers" when $c : Customer() exists (Customer( name contains $c.family)) then c.addDiscount(5); end

Conflict resolution ,[object Object],[object Object],[object Object],[object Object],[object Object]

Drools Performance ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],(Sequentialete) 16ms/15ms 4ms/4ms 100 1219 JRules Drools Objects rules

Drools Performance Contd. ,[object Object],[object Object],2642 1305 34 1661 1001 34 956 697 34 420 393 34 Waltz DB 9030 3873 31 1582 958 31 Waltz Time (ms) Object Count Rule Count Bench Marks

Rule based Solution ,[object Object],[object Object],[object Object],[object Object],[object Object]

Concrete Rules ,[object Object],[object Object],[object Object],[object Object],[object Object]

Conclusion ,[object Object],[object Object],[object Object],[object Object]

Droolsand Rule Based Systems 2008 Srping

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Droolsand Rule Based Systems 2008 Srping