APPLICATION MODERNIZATION. Brian May IBM i Modernization Specialist

Transcription

1 APPLICATION MODERNIZATION Brian May IBM i Modernization Specialist

2 APPLICATION MODERNIZATION Three critical areas of modernization The future of RPG and Rational Open Access, RPG Edition MVC Modernize vs. Rewrite Profound UI Q & A Hands on Lab

3 Application Modernization THREE CRITICAL AREAS

4 THREE CRITICAL AREAS Database DDS Defined DDL Defined

5 THREE CRITICAL AREAS Database Record Level Access SQL Access Setll Key MyFile ; Reade Key MyFile; DoW Not %EOF; Update MyFile; Reade Key MyFile; EndDo; Update MyFile Set x= y Where KeyField = Key ;

6 THREE CRITICAL AREAS Database RLA vs. SQL Does not have to be exclusive Triggers Enforce business rules no matter where updates originate Constraints Ensure data integrity Reduce code required in programs Identity Columns Every row in every table needs a unique key Easily link tables with a single field

7 THREE CRITICAL AREAS Code Monolithic Code ILE

8 THREE CRITICAL AREAS Code Free Form vs. Fixed Form Personal Choice Free Form is more intuitive to new RPG developers Named Indicators vs. Numeric Indicators Numeric Indicators force maintenance developers to spend time determining meaning of indicator Named Indicators can have descriptive names to save time and add clarity Descriptive Field Names Longer names allow variables to have meaningful names Adds clarity for maintenance

9 THREE CRITICAL AREAS User Interface

10 THREE CRITICAL AREAS User Interface Green Screens are immediately give an outdated impression Users expect features that are not available on 5250 applications Many different options available and none of them are necessarily wrong

11 Application Modernization FUTURE OF RPG

12 FUTURE OF RPG IBM s commitment to IBM i (and RPG) IBM recently released charts showing plans for support beyond IBM has consistently added significant functionality to RPG in each release of IBM I Built-in XML support Data Structure and Array enhancements Local File support for subprocedures Larger storage limits

13 FUTURE OF RPG RPG is still the ideal language for business logic Numbers, Numbers, Numbers Business logic is all about numbers Prices Quantities RPG handles decimal precision simply and elegantly Database Integration Both RLA and SQL access to data is simple in RPG Date Data Type Some languages require use of complex classes to use dates properly In RPG, Date is a native data type

14 FUTURE OF RPG Rational Open Access, RPG Edition Open Access For RPG UI Handler Print Handler DB Handler

15 FUTURE OF RPG Rational Open Access, RPG Edition

16 Application Modernization MVC

17 MVC Open Access can be your first step to MVC What is MVC? Model Your data and business rules View Your UI Controller Your program to control your application MVC is a mainstream approach to application design. Allows for any of the 3 pieces to be replaced without major changes to the others.

18 MVC Typically, RPG applications are large monolithic programs My Huge Subfile Program Only 5250 Output All business rules contained within

19 MVC RPG Open Access allows us to separate the view from the RPG program using an open interface. RPG OA My Huge Subfile Program Uses RPG OA All business rules contained within

20 MVC After we modernize our UI, all that s left is to move our business rules into ILE service programs to achieve an MVC design. RPG OA My Modern Application Uses RPG OA Calls service routines ILE My Service Program

21 Application Modernization MODERNIZE VS. REWRITE

22 MODERNIZE OR REWRITE It depends Unfortunately, as with most IT decisions, this question is not a simple choice. Factors Was the application written in house or purchased? Do you have ALL the source code? Does your application currently meet the needs of your business? Is the business committed to the project?

23 MODERNIZE OR REWRITE Remember, the answer is likely a mix of both! Make sure the path you take is flexible enough to support both modernization and new development. While existing applications are being reworked, new development should be developed to your shop s new modern standards.

24 Application Modernization PROFOUND UI

25 ABOUT PROFOUND LOGIC In business for more than a decade Specialize in modernization tools and services for IBM i First Modernization Handler Provider for Rational Open Access for RPG Over 1,000 customers and millions of lines of code modernized

26 PROFOUND UI SUITE Profound UI Open Access Handler and JS Framework for RPG Visual Designer WYSIWYG Visual Screen Development Tool DDS Conversion Automated tool to convert existing DDS Display File Source to Rich Display File for use with Profound UI Genie On the fly, browser based screen enhancement Atrium Web based portal and menu system

27 Application Modernization Q & A

28 Application Modernization HANDS ON LAB Copyright

29 LAB MATERIALS Profound UI Lab Genie Lab Sign on information on cards being handed out

30 MORE INFORMATION/ CONTACT Contact Sales: or Product videos and trial download ProfoundUI.com Profound Logic Newsletter: /profoundui company/profound-logic-software-inc.