[KieLive#11] DMN for Developers, by Guilherme Carreiro

In this live-stream session you'll learn how DMN works and how you can bring the future of business rules implementation to your application

About this Event

When business decisions get more complex, it's essential to have more eyes revisiting it. However, sometimes the eyes that hold most of the business logic acknowledgment are not the same holding the technical skills for double-checking or even changing the implementation.

In this kind of scenario, the DMN shines as an excellent tool. DMN allows developers and business stakeholders to have a single source of communication and execution. Join us in this live-stream to learn how DMN works and how you can bring the future to your application!

Link to the live streaming: http://red.ht/KieLive11

About the invited speaker:

Guilherme Carreiro, aka karreiro, is part of the KIE team since 2016 and currently the DMN Tooling lead. He's also the author of the learn-dmn-in-15-minutes.com course and frequently presents talks at conferences about his work. If you want to check more about him, he's an old-school-blogger at karreiro.com.

Transcript

1. DMN for Developers by Guilherme Carreiro (DMN tooling lead) karreiro.com / / / KIE Live #11 October 20th
3. Everyone
4. <dmn:definitions xmlns:dmn="http://www.omg.org/spec/DMN/20180521/MODEL/" xmlns="https://kiegroup.org/dmn/_E6FF622D-0C55-43F4-9977-857E17D7AFFA" xmlns:feel="http://www.omg.org/spec/DMN/20180521/FEEL/" xmlns:kie="http://www.drools.org/kie/dmn/1.2" xmlns:dmndi="http://www.omg.org/spec/DMN/20180521/DMNDI/" xmlns:di="http://www.omg.org/spec/DMN/20180521/DI/" xmlns:dc=“http://www.omg.org/spec/DMN/20180521/DC/" id=“_A152369F-877B-4665-AB7E-5EE390DE73D8" name=“a" typeLanguage=“http://www.omg.org/spec/DMN/20180521/FEEL/" namespace="https://kiegroup.org/dmn/_E6FF622D-0C55-43F4-9977-857E17D7AFFA"> <dmn:extensionElements/> <dmn:itemDefinition id="_056212A1-BB5A-47FA-9574-EC1762018642" name="AAA" isCollection="false"> <dmn:typeRef>string</dmn:typeRef> </dmn:itemDefinition> <dmn:decision id="_DCE44CA9-CC71-4E38-87A6-6713F9FE8453" name="Decision-1"> <dmn:extensionElements/> <dmn:variable id="_C0ED662E-262E-4CE3-B3F1-B91B0E9D7AB7" name="Decision-1" typeRef="AAA"/> <dmn:literalExpression id="_595FE190-B7DA-44F3-9E76-9032963CD23F"> <dmn:text>"123"</dmn:text> </dmn:literalExpression> </dmn:decision> <dmndi:DMNDI> <dmndi:DMNDiagram id="_1F36C95C-A58A-4904-ACD6-0A882EDEE885" name="DRG"> <di:extension> <kie:ComponentsWidthsExtension> <kie:ComponentWidths dmnElementRef="_595FE190-B7DA-44F3-9E76-9032963CD23F"> <kie:width>300</kie:width> </kie:ComponentWidths> </kie:ComponentsWidthsExtension> </di:extension> <dmndi:DMNShape id="dmnshape-drg-_DCE44CA9-CC71-4E38-87A6-6713F9FE8453" dmnElementRef="_DCE44CA9-CC71-4E38-87A6-6713F9FE8453" isCollapsed="false"> <dmndi:DMNStyle> <dmndi:FillColor red="255" green="255" blue="255"/> <dmndi:StrokeColor red="0" green="0" blue="0"/> Everyone
5. <dmn:definitions xmlns:dmn="http://www.omg.org/spec/DMN/20180521/MODEL/" xmlns="https://kiegroup.org/dmn/_E6FF622D-0C55-43F4-9977-857E17D7AFFA" xmlns:feel="http://www.omg.org/spec/DMN/20180521/FEEL/" xmlns:kie="http://www.drools.org/kie/dmn/1.2" xmlns:dmndi="http://www.omg.org/spec/DMN/20180521/DMNDI/" xmlns:di="http://www.omg.org/spec/DMN/20180521/DI/" xmlns:dc=“http://www.omg.org/spec/DMN/20180521/DC/" id=“_A152369F-877B-4665-AB7E-5EE390DE73D8" name=“a" typeLanguage=“http://www.omg.org/spec/DMN/20180521/FEEL/" namespace="https://kiegroup.org/dmn/_E6FF622D-0C55-43F4-9977-857E17D7AFFA"> <dmn:extensionElements/> <dmn:itemDefinition id="_056212A1-BB5A-47FA-9574-EC1762018642" name="AAA" isCollection="false"> <dmn:typeRef>string</dmn:typeRef> </dmn:itemDefinition> <dmn:decision id="_DCE44CA9-CC71-4E38-87A6-6713F9FE8453" name="Decision-1"> <dmn:extensionElements/> <dmn:variable id="_C0ED662E-262E-4CE3-B3F1-B91B0E9D7AB7" name="Decision-1" typeRef="AAA"/> <dmn:literalExpression id="_595FE190-B7DA-44F3-9E76-9032963CD23F"> <dmn:text>"123"</dmn:text> </dmn:literalExpression> </dmn:decision> <dmndi:DMNDI> <dmndi:DMNDiagram id="_1F36C95C-A58A-4904-ACD6-0A882EDEE885" name="DRG"> <di:extension> <kie:ComponentsWidthsExtension> <kie:ComponentWidths dmnElementRef="_595FE190-B7DA-44F3-9E76-9032963CD23F"> <kie:width>300</kie:width> </kie:ComponentWidths> </kie:ComponentsWidthsExtension> </di:extension> <dmndi:DMNShape id="dmnshape-drg-_DCE44CA9-CC71-4E38-87A6-6713F9FE8453" dmnElementRef="_DCE44CA9-CC71-4E38-87A6-6713F9FE8453" isCollapsed="false"> <dmndi:DMNStyle> <dmndi:FillColor red="255" green="255" blue="255"/> <dmndi:StrokeColor red="0" green="0" blue="0"/> Everyone DMN engine
6. <dmn:definitions xmlns:dmn="http://www.omg.org/spec/DMN/20180521/MODEL/" xmlns="https://kiegroup.org/dmn/_E6FF622D-0C55-43F4-9977-857E17D7AFFA" xmlns:feel="http://www.omg.org/spec/DMN/20180521/FEEL/" xmlns:kie="http://www.drools.org/kie/dmn/1.2" xmlns:dmndi="http://www.omg.org/spec/DMN/20180521/DMNDI/" xmlns:di="http://www.omg.org/spec/DMN/20180521/DI/" xmlns:dc=“http://www.omg.org/spec/DMN/20180521/DC/" id=“_A152369F-877B-4665-AB7E-5EE390DE73D8" name=“a" typeLanguage=“http://www.omg.org/spec/DMN/20180521/FEEL/" namespace="https://kiegroup.org/dmn/_E6FF622D-0C55-43F4-9977-857E17D7AFFA"> <dmn:extensionElements/> <dmn:itemDefinition id="_056212A1-BB5A-47FA-9574-EC1762018642" name="AAA" isCollection="false"> <dmn:typeRef>string</dmn:typeRef> </dmn:itemDefinition> <dmn:decision id="_DCE44CA9-CC71-4E38-87A6-6713F9FE8453" name="Decision-1"> <dmn:extensionElements/> <dmn:variable id="_C0ED662E-262E-4CE3-B3F1-B91B0E9D7AB7" name="Decision-1" typeRef="AAA"/> <dmn:literalExpression id="_595FE190-B7DA-44F3-9E76-9032963CD23F"> <dmn:text>"123"</dmn:text> </dmn:literalExpression> </dmn:decision> <dmndi:DMNDI> <dmndi:DMNDiagram id="_1F36C95C-A58A-4904-ACD6-0A882EDEE885" name="DRG"> <di:extension> <kie:ComponentsWidthsExtension> <kie:ComponentWidths dmnElementRef="_595FE190-B7DA-44F3-9E76-9032963CD23F"> <kie:width>300</kie:width> </kie:ComponentWidths> </kie:ComponentsWidthsExtension> </di:extension> <dmndi:DMNShape id="dmnshape-drg-_DCE44CA9-CC71-4E38-87A6-6713F9FE8453" dmnElementRef="_DCE44CA9-CC71-4E38-87A6-6713F9FE8453" isCollapsed="false"> <dmndi:DMNStyle> <dmndi:FillColor red="255" green="255" blue="255"/> <dmndi:StrokeColor red="0" green="0" blue="0"/> Everyone DMN engine
7. <dmn:definitions xmlns:dmn="http://www.omg.org/spec/DMN/20180521/MODEL/" xmlns="https://kiegroup.org/dmn/_E6FF622D-0C55-43F4-9977-857E17D7AFFA" xmlns:feel="http://www.omg.org/spec/DMN/20180521/FEEL/" xmlns:kie="http://www.drools.org/kie/dmn/1.2" xmlns:dmndi="http://www.omg.org/spec/DMN/20180521/DMNDI/" xmlns:di="http://www.omg.org/spec/DMN/20180521/DI/" xmlns:dc=“http://www.omg.org/spec/DMN/20180521/DC/" id=“_A152369F-877B-4665-AB7E-5EE390DE73D8" name=“a" typeLanguage=“http://www.omg.org/spec/DMN/20180521/FEEL/" namespace="https://kiegroup.org/dmn/_E6FF622D-0C55-43F4-9977-857E17D7AFFA"> <dmn:extensionElements/> <dmn:itemDefinition id="_056212A1-BB5A-47FA-9574-EC1762018642" name="AAA" isCollection="false"> <dmn:typeRef>string</dmn:typeRef> </dmn:itemDefinition> <dmn:decision id="_DCE44CA9-CC71-4E38-87A6-6713F9FE8453" name="Decision-1"> <dmn:extensionElements/> <dmn:variable id="_C0ED662E-262E-4CE3-B3F1-B91B0E9D7AB7" name="Decision-1" typeRef="AAA"/> <dmn:literalExpression id="_595FE190-B7DA-44F3-9E76-9032963CD23F"> <dmn:text>"123"</dmn:text> </dmn:literalExpression> </dmn:decision> <dmndi:DMNDI> <dmndi:DMNDiagram id="_1F36C95C-A58A-4904-ACD6-0A882EDEE885" name="DRG"> <di:extension> <kie:ComponentsWidthsExtension> <kie:ComponentWidths dmnElementRef="_595FE190-B7DA-44F3-9E76-9032963CD23F"> <kie:width>300</kie:width> </kie:ComponentWidths> </kie:ComponentsWidthsExtension> </di:extension> <dmndi:DMNShape id="dmnshape-drg-_DCE44CA9-CC71-4E38-87A6-6713F9FE8453" dmnElementRef="_DCE44CA9-CC71-4E38-87A6-6713F9FE8453" isCollapsed="false"> <dmndi:DMNStyle> <dmndi:FillColor red="255" green="255" blue="255"/> <dmndi:StrokeColor red="0" green="0" blue="0"/> User DMN engine DMN editor in 4 steps
8. 1. Installation 1
9. 2. Visual notation 2
10. 2 learn-dmn-in-15-minutes.com/learn/visual-notation
11. 3. Data Types 3
12. 3 Vioaltion Type String Actual Speed Number Speed Limit Number Fine Amount Number Name Number String Driver Age Number Name String Points Number
16. 4. Decision logic 4
18. learn-dmn-in-15-minutes.com/learn/decision-logic http:/ /learn-dmn-in-15-minutes.com/learn/the-feel-language 4
20. Bonus step
21. . Execution
26. def create @violation = Violation.new(violation_params) respond_to do |format| if @violation.save result = DmnModel.execute(@violation) # Execute via REST API driver = @violation.driver driver.points += result['Fine']['Points'] driver.suspended = result['Should be suspended?'] == 'YES' driver.save! format.html { redirect_to @violation, notice: 'Violation was successfully created.' } else format.html { render :new } end end end
27. def create @violation = Violation.new(violation_params) respond_to do |format| if @violation.save result = DmnModel.execute(@violation) # Execute via REST API driver = @violation.driver driver.points += result['Fine']['Points'] driver.suspended = result['Should be suspended?'] == 'YES' driver.save! format.html { redirect_to @violation, notice: 'Violation was successfully created.' } else format.html { render :new } end end end
28. https:/ /github.com/karreiro/dmn-on-rails-example
29. Review
30. Installation
31. Visual notation Installation
32. Visual notation Data Types Installation
33. Visual notation Decision logic Data Types Installation
34. https:/ /bit.ly/dmn-cookbook
36. <dmn:definitions xmlns:dmn="http://www.omg.org/spec/DMN/20180521/MODEL/" xmlns="https://kiegroup.org/dmn/_E6FF622D-0C55-43F4-9977-857E17D7AFFA" xmlns:feel="http://www.omg.org/spec/DMN/20180521/FEEL/" xmlns:kie="http://www.drools.org/kie/dmn/1.2" xmlns:dmndi="http://www.omg.org/spec/DMN/20180521/DMNDI/" xmlns:di="http://www.omg.org/spec/DMN/20180521/DI/" xmlns:dc=“http://www.omg.org/spec/DMN/20180521/DC/" id=“_A152369F-877B-4665-AB7E-5EE390DE73D8" name=“a" typeLanguage=“http://www.omg.org/spec/DMN/20180521/FEEL/" namespace="https://kiegroup.org/dmn/_E6FF622D-0C55-43F4-9977-857E17D7AFFA"> <dmn:extensionElements/> <dmn:itemDefinition id="_056212A1-BB5A-47FA-9574-EC1762018642" name="AAA" isCollection="false"> <dmn:typeRef>string</dmn:typeRef> </dmn:itemDefinition> <dmn:decision id="_DCE44CA9-CC71-4E38-87A6-6713F9FE8453" name="Decision-1"> <dmn:extensionElements/> <dmn:variable id="_C0ED662E-262E-4CE3-B3F1-B91B0E9D7AB7" name="Decision-1" typeRef="AAA"/> <dmn:literalExpression id="_595FE190-B7DA-44F3-9E76-9032963CD23F"> <dmn:text>"123"</dmn:text> </dmn:literalExpression> </dmn:decision> <dmndi:DMNDI> <dmndi:DMNDiagram id="_1F36C95C-A58A-4904-ACD6-0A882EDEE885" name="DRG"> <di:extension> <kie:ComponentsWidthsExtension> <kie:ComponentWidths dmnElementRef="_595FE190-B7DA-44F3-9E76-9032963CD23F"> <kie:width>300</kie:width> </kie:ComponentWidths> </kie:ComponentsWidthsExtension> </di:extension> <dmndi:DMNShape id="dmnshape-drg-_DCE44CA9-CC71-4E38-87A6-6713F9FE8453" dmnElementRef="_DCE44CA9-CC71-4E38-87A6-6713F9FE8453" isCollapsed="false"> <dmndi:DMNStyle> <dmndi:FillColor red="255" green="255" blue="255"/> <dmndi:StrokeColor red="0" green="0" blue="0"/> <dmndi:FontColor red="0" green="0" blue="0"/> </dmndi:DMNStyle> <dc:Bounds x="172" y="154" width="100" height="50"/> <dmndi:DMNLabel/> Thank you! karreiro.com/talks