Integration to Fuel Truck Flowmeter Register. Java Native Interface. Windows Platforms

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1 Integratin t Fuel Truck Flwmeter Register via Java Native Interface n Windws Platfrms Team: Dec13-07

2 Team Members Bryce Kvindlg Yaze Wang Jasn Kaiser Advisr Prfessr Gurpur Prabhu Client Oakland Crpratin Carl Garrett

3 Intrductin Oakland Crpratin Agriculture Sftware and IT Slutins Fuel Truck Pint f Sale (FuelPOS) Liquid Cntrls Flw Meter Business Challenges Outdated Sftware New Standards fr Weights and Measures Laws Permissin t use phtgraph granted by Oakland Crpratin, 2013

4 Fuel Truck Layut With Signal Meter LectrCunt LCR-ii Installatin and Parts, Liquid Cntrls

5 Flw Meter Cmmunicatin LectrCunt LCR-ii Installatin and Parts, Liquid Cntrls

6 Client Sftware GUI Permissin t use phtgraph granted by Oakland Crpratin

7 Prject Gals Imprving Implementatin Handles Mdern Operating Systems Rbust Errr Handling Adding Mre Functins Simultaneusly Handles Up t Tw Fuel Meters Printer Cmmunicates Directly with Fuel Meters Deliverables FlwMeter Implementatin (JAR library) LCR Native Wrapper (32-bit DLL)

8 Design Cnstraints Java Runtime Envirnment 1.7.X Java API Versin 7.X C++ Liquid Cntrls API Windws 7/8/8.1 Run n Fuel Trucks

9 Design Slutin Java Classes t represent fuel meters Java classes will allw use f gd bjectriented practices Java cnsistent wrapping f C++ functins Wrap C++ API calls as Java functins with exceptins and classes fr bit masked values C++ Device Cmmunicatin Using Liquid Cntrls API eliminates the need t rewrite, implement, and test functins in Java

10 Current State f Design Thrw Java exceptin n errrs, instead f returning a cde Use enumeratins that can be cnverted t values Thread safe java cde C-fcus apprach vs. Java-fcus apprach

11 Java Wrapper API Advantages Prgram changes nly require changes t Java implementatin C++ methds nly need t be changed after API changes Object-riented design patterns can be fllwed Easier client maintainability Disadvantages Functins will be slwer due t frequent calls thrugh native interfaces Time cnsuming mirrring f functinality

12 Liquid Cntrls API t Java Wrapper C methds use pinters t return multiple structures Cnvert return variables t single class Bit-masked t integral types Used t represent blean fields Cnvert t a Java bject Return cdes used t determine errrs Parse return cdes and thrw Java exceptins

13 Blck Diagram Fr Real System Java Cde C++ DemApp GUI Prgram Interface Flw Meter Device Implementatin Java Virtual Machine JNI Functins Liquid Cntrls Device

14 Technical Challenges Develpment Envirnment Surce cntrl Cmpiler/Linking Integratin Difficulty Develped n Windws 8 + Tested n Windws 7 = Hidden library dependencies Dealing with 32 bit and 64 bit envirnment Cnfusing Dcumentatin

15 Testing Overview Pre Meter Testing Using data frm a testing meter (MckAPI) Tested functinality which des nt require the meter hardware. (e.g. discnnectin errrs, & wrapper functinality) Pst Meter Testing Is being dne with a physical meter. Testing invlves bth white bx and black bx testing methds. Ensure all requirements are met thrughly.

16 Testing Objectives Test errr cnditins thrughly Will be tested with a variety f methds, largely invlving JUNIT tests. Test the wrapper: Integratin Test Will be tested using white bx. Tests will be written t ensure each functin perates as intended. Testing fr the implemented prject Will invlve black bx testing methds. Testing with client's cde: Regressin Testing

17 Test Case: Preset Delivery Open cnnectin t the device. Assign a preset vlume n the device Tell the device t start the delivery Keep checking n the device until it indicates the delivery has paused 5. Tell the device t stp the delivery

18 FuelPOS Test GUI Permissin t use phtgraph granted by Oakland Crpratin

19 Q & A Time Any Questins?

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