2011-03-29 London - Why do I need the guvnor BRMS?
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![Guvnor agenda ,[object Object]](https://image.slidesharecdn.com/2011-03-29london-whydoineedtheguvnorbrms-110331062434-phpapp01/75/20110329-london-why-do-i-need-the-guvnor-brms-2-2048.jpg?cb=1669281108)
![The myth ,[object Object]](https://image.slidesharecdn.com/2011-03-29london-whydoineedtheguvnorbrms-110331062434-phpapp01/75/20110329-london-why-do-i-need-the-guvnor-brms-8-2048.jpg?cb=1669281108)
![Drools is Turing complete ,[object Object],[object Object]](https://image.slidesharecdn.com/2011-03-29london-whydoineedtheguvnorbrms-110331062434-phpapp01/75/20110329-london-why-do-i-need-the-guvnor-brms-9-2048.jpg?cb=1669281108)
![Declarative like RegEx, SQL, JPA-QL, … ,[object Object],[object Object],[object Object]](https://image.slidesharecdn.com/2011-03-29london-whydoineedtheguvnorbrms-110331062434-phpapp01/75/20110329-london-why-do-i-need-the-guvnor-brms-11-2048.jpg?cb=1669281108)
![Use cases ,[object Object]](https://image.slidesharecdn.com/2011-03-29london-whydoineedtheguvnorbrms-110331062434-phpapp01/75/20110329-london-why-do-i-need-the-guvnor-brms-13-2048.jpg?cb=1669281108)
![Insurances acceptance and fee calculation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]](https://image.slidesharecdn.com/2011-03-29london-whydoineedtheguvnorbrms-110331062434-phpapp01/75/20110329-london-why-do-i-need-the-guvnor-brms-14-2048.jpg?cb=1669281108)
![Developers don't like data input from spreadsheets ,[object Object]](https://image.slidesharecdn.com/2011-03-29london-whydoineedtheguvnorbrms-110331062434-phpapp01/75/20110329-london-why-do-i-need-the-guvnor-brms-16-2048.jpg?cb=1669281108)
![Mortgage experts like the flexibility of spreadsheets ,[object Object],Invalid: must be a number ,[object Object]](https://image.slidesharecdn.com/2011-03-29london-whydoineedtheguvnorbrms-110331062434-phpapp01/75/20110329-london-why-do-i-need-the-guvnor-brms-18-2048.jpg?cb=1669281108)
![Data model in Guvnor ,[object Object]](https://image.slidesharecdn.com/2011-03-29london-whydoineedtheguvnorbrms-110331062434-phpapp01/75/20110329-london-why-do-i-need-the-guvnor-brms-21-2048.jpg?cb=1669281108)
![Mortgage experts like the flexibility of Guvnor ,[object Object]](https://image.slidesharecdn.com/2011-03-29london-whydoineedtheguvnorbrms-110331062434-phpapp01/75/20110329-london-why-do-i-need-the-guvnor-brms-23-2048.jpg?cb=1669281108)
![Schooled domain expertise ,[object Object]](https://image.slidesharecdn.com/2011-03-29london-whydoineedtheguvnorbrms-110331062434-phpapp01/75/20110329-london-why-do-i-need-the-guvnor-brms-25-2048.jpg?cb=1669281108)
![years of mortgage customer experience? No ,[object Object]](https://image.slidesharecdn.com/2011-03-29london-whydoineedtheguvnorbrms-110331062434-phpapp01/75/20110329-london-why-do-i-need-the-guvnor-brms-27-2048.jpg?cb=1669281108)
![Are we, the developers, domain experts? No ,[object Object]](https://image.slidesharecdn.com/2011-03-29london-whydoineedtheguvnorbrms-110331062434-phpapp01/75/20110329-london-why-do-i-need-the-guvnor-brms-28-2048.jpg?cb=1669281108)
![Domain experts can not read/write Java source code ,[object Object],for (Mortgage m : mortgages ) { for (Applicant a : m.getApplicants()) { if (a.getAge() > 70 ) { boolean existsGuarantor = false ; for (Guarantor g : m.getGuarantors() { if (g.getAge < 60 ) { existsGuarantor = true ; } } // Will they spot the bug in this code? if (existsGuarantor) { m.setApproved( false ); } } } } ,[object Object]](https://image.slidesharecdn.com/2011-03-29london-whydoineedtheguvnorbrms-110331062434-phpapp01/75/20110329-london-why-do-i-need-the-guvnor-brms-29-2048.jpg?cb=1669281108)
2011-03-29 London - Why do I need the guvnor BRMS?
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Why do I need the Guvnor BRMS and the Drools rule engine?
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2011-03-29 London - Why do I need the guvnor BRMS?
- 1. Geoffrey De Smet Why do I need the Guvnor BRMS?
- 3. My business requires domain expertise
- 4. My business rules change often
- 7. Use cases I have hammer, so every problem is a nail?
- 10. Not imperative like Java, Scala, Groovy, ...
- 17. Which field has the result our application need? Version 1 Version 2
- 19. when income below 1000 and age above 50
- 20. when income below 1% of mortgage amount
- 22. or Design the model in Guvnor:
- 24. My business requires domain expertise Only mortgage managers understand mortgage rules
- 26. participated in mortgages conferences/courses? No
- 30. Domain experts can read/write DRL with Guided Rule Editor Change
- 31. Guided Rule Editor demo video Demo video
- 33. Domain experts make the building Source: wikipedia
- 34. My business rules change often This mortgage rule change must be released by noon
- 38. Self-service by mortgage manager
- 43. Auditable and reproducible Why was that mortgage approved last year?
- 45. Future improvements Feed-back welcome
- 47. Dependency graph (like Maven/OSGi but simplified) Mortgage rules Car loan rules General loan rules Customer rules 2.0 1.1 1.1 2.1
- 49. Test
- 51. Immutable (all dependent modules are released)
- 52. Summary
- 57. Useful links
- 58. Website
- 60. Reference manual
- 62. Blog
- 64. Mailing lists (forum interface through nabble.com)