Skills for the Rpg Prog 2

7/29/2019 Skills for the Rpg Prog 2

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2001 ComCon

Skills for the RPG Programmer

ComCon5, Oakton Court

Ballybrack

Co. Dublin

Ireland

Re-skilling the RPG Programmer

Phone: +353 1 282 6230

e-Mail: [email protected]

Web: www.ComConAdvisor.com

Paul Tuohy


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WEBCAST SCHEDULE

Todays event will run one-hour long. Here are the expected times foreach segment of the webcast:

:00 :05: Moderator introduces the speaker and discusses the detailsof the Webcast.

:05- :35: Speaker delivers a PowerPoint presentation on the webcasttopic.

:35- :60: Moderator and speaker engage in a Q&A on the topic.

You can submit questions to the speaker at any time during the event.Just click on the Ask a Question button at the bottom of thepresentation screen.


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TECHNICAL FAQs

Here are answers to the most common technical problems users encounter

during a webcast:

Q: Why cant I hear the audio part of the webcast?

A: Try increasing the volume on your computer.

Q: I just entered the webcast and do not see the slide that the speaker isreferring to. What should I do?

A: The slides are constantly be pushed to your screen. Youll should refresh(hit F5) to view the latest slide.

If your question is still not answered, please click the Ask a Questionbutton at the bottom of your screen and submit your problem. A technicalsupport person will respond immediately.

You can also visit the Broadcast Help page for more information or to testyour browser compatibility: http://help.yahoo.com/help/bcst/


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2001 ComCon

Skills for the RPG Programmer

ComCon5, Oakton Court

Ballybrack

Co. Dublin

Ireland

Re-skilling the RPG Programmer

Phone: +353 1 282 6230

e-Mail: [email protected]

Web: www.ComConAdvisor.com

Paul Tuohy


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2001 ComCon

Agenda

Skills for what? Why do you need to re-skill? What has changed?

What Are The First Steps? Know your system.

Know your database.

Use The Right Tools for the Job. Get to Grips with RPG IV and ILE.

Find Out about Event-Driven Programming.

Learn the basics of HTML and Javascript.

Then What? HTML, Javascript and CGI. Visualage RPG

Java

WebSphere whatever.


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2001 ComCon

The times they are a changing.......

Java

WebSphere

ILEWebFacing

RPG IV

HTML/CGI


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Premise

You are not using third-party tools There are many Greatthird-party tools out there.

I will mention some later.

Maybe you should be using one of them!!!!

All You Have is WebSphere Development Toolset (V5R1)

or WebSphere Development Studio Client (V5R1/V5R2)!Application Development Toolset (ADTS). WebSphere Development Tools for iSeries.

Code/400 (Editor, Designer, Project Manager).

Distributed Debugger

WebSphere Studio

WebFacing Tool

VisualAge for RPG. VisualAge for Java

ALL of the compilers for OS/400RPG, Cobol, C, Java, etc.


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Where to Start?

There are a few things you need to look into before you enhance

your programming skills. Become familiar with the IFS (Integrated File System)

Become familiar with iSeries Navigator (Operations Navigator)Especially the IFS and Database.

Grasp the basics of SQLYou can do this from iSeries Navigator without Interactive SQL.

SQL is slowly(?) replacing DDS. Find out about triggers.

Find out about referential integrity.


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Use iSeries Navigator

iSeries Navigator is the GUI interface for OS/400 Navigator is getting the development dollars Green Screen is not! Navigator is part of the free portion of iSeries Access.

Have a look at Basic Operations to get a feel for how it works.

Become familiar with the IFS (Integrated File System)

Become familiar with the Databases.


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Explore the IFS

iSeries supports multiple file systems not just QSYS! Root - PC style QOpenSys - Unix style

QDLS - Shared Folders

QSYS.LIB - Traditional OS/400

QOPT - Optical Storage

QNTC - Windows NT Servers

And more


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2001 ComCon

Explore Databases

This is the new interface for Database functions Have a look at how tables/views and indexes are created


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2001 ComCon

Creating a Table

This is not DDS! Navigator offers a friendly interface to SQLs Data Definition Language (DDL)


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2001 ComCon

Database Navigator

Database Navigator will give you a diagram of your Database! Just a little bit easier then DSPFD and DSPFFD!


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2001 ComCon

SQL

Get to grips with SQL. It is becoming the standard for maintaining the database. SQL is being developed - DDS is not.


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2001 ComCon

Triggers and Referential Integrity

Triggers Programs that are called when a row (record) is inserted, updated or deleted.An excellent means of applying business rules.

Referential Integrity Define relationships between tables (physical files) e.g.

You cannot delete a customer if they have outstanding invoices

When you delete the Order Header record, automatically delete allcorresponding Order Details.


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2001 ComCon

The Choices

Green ScreenAlthough everything is heading towards GUI,

there is still a place for green screen within

applications.

Not everything lends itself to point and click.

GUI Application Good old Client Server!

Browser-based The interface is in a browser.

Fast becoming the most popular.

Easiest to distribute to the Internet.


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2001 ComCon

The Right Tools

Get with the right tools.

SEU/SDA/RLU are NOT up to the job.

Use of Code/400 can increase productivity by 20% to 40%!!!


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2001 ComCon

Code/400

Code/400 isA customizable editor Reference manual as help

Navigator

Verifier

Much, much more


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2001 ComCon

Code/400 Editor


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2001 ComCon

Code/400 Verifier


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2001 ComCon

Code/400 Help


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2001 ComCon

Code/400 Navigator


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2001 ComCon

RPG IV

Get up to speed with RPG IV

If you are still using RPG III - STOP NOW

You will start to see gains from RPG IV within a very short period of

time.

/FREED_PgmTxt = *Blank;D_Proc = SDSProcName;D_PgmTxt = 'Work with';

If Show_Paid and Show_Unpaid;D_PgmTxt = %trim(D_PgmTxt) + ' Paid and Unpaid';EndIf;

If Show_Paid and Not Show_Unpaid;D_PgmTxt = %trim(D_PgmTxt) + ' Paid';

EndIf;

/END-FREE


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2001 ComCon

Getting there

Getting there is easy!

CVTRPGSRC IBM supplied conversion tool.

Performs basic syntax conversion.

Convert, Compile, Relax.

Third-party Option If you want more than basic syntax conversion.

If you want code re-engineered to use new features.

Check out the RPGToolBox from Linoma Software (www.linoma.com)


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2001 ComCon

RPG IV Highlights

Here you have it -- the brand new RPG!

10-character external names (files, format and field names).Allow mixed case.

Allow blank lines.

Introduction of new Definition (D) Specification.

Elimination of Extension (E) and Line Counter (L) Specifications and the

practical elimination of Input (I) Specifications.

Re-definition of the Header (H), File (F) and Calculation (C) Specifications. More powerful array definition and processing.

Prefixing externally defined files.

Date processing and manipulation.

Named Indicators Introduction of new data types, especially integers and pointers.

Introduction of Built-in Functions (e.g. %SUBST). Introduction of Subprocedures and other ILE-related features.

Integration with Java.

And, of course, free format.

But perhaps the most important change is that the re-structuring has made RPG

even easier to change in the future


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2001 ComCon

Subprocedures

Subprocedures are the biggest change to RPG - EVER!

They provide a means ofencapsulation.

DayNumber = DayofWeek(InputDate);

ErrInds = ValidCustomer(CustomerData);

If (GetCustomerDept(Customer)) = 'A01';


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2001 ComCon

Subprocedures

This is what the code looks like.......

P DayOfWeek BD PI 1P 0D InpDate D

D ASaturday S D Inz(D'02/13/99')D WorkDay S 1P 0

/FREE

WorkDay = %Rem(%Diff(InpDate : ASaturday : *D): 7);If WorkDay < 1;

WorkDay = WorkDay + 7;EndIf;

Return WorkDay;

/END-FREEP DayOfWeek E


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2001 ComCon

ILE

Subprocedures lead to Service Programs.

You start to look at program design in a different way.

Procedure

Procedure

Procedure

Procedure

Procedure

Procedure

*Module

*Module

*SrvPgm

Procedure

Procedure

*Module

Procedure

Procedure

*Module

*Pgm


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2001 ComCon

Clients are Event Driven!

Client Applications are event driven.

Client Applications can be written in: Java

Visual Basic

C/C++

Any PC programming language

Even RPG!!!!

For VisualAge RPG you need to learn GUI Design

Event Driven

But it is still RPG


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2001 ComCon

HTML

Learn the basics of HTML Easy to learn Lots of good books.

I liked "HTML for the World Wide Web" by

Elizabeth Castro ISBN 0-201-35493-4

Code/400 is a HTML editor.

To contact us:

Phone: +353 1 282 6230
Fax: +353 1 282 6230
Email:

[email protected]

5, Oakton Court

Ballybrack
Co. Dublin
Ireland

ComCon Computer Consultants 2002


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2001 ComCon

CGI stands for 'Common Gateway Interface' It supports the ability to dynamically build Web pages

It dictates format of the data stream for requests and responses

A standard for communicating between a browser and an HTTP Server

Server is configured to pass specific URLs to CGI scripts Not simply to respond with a pre-built Web page

In our case the "script" will be an RPG IV program

The program generates HTML and passes it to the server Which then sends it out for display as it would any other page

CGI programming on the AS/400 is supported by RPG IV (ILE RPG)

Java Plus ILE COBOL, ILE C, ILE C++, Rexx and Perl

What is CGI ?


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2001 ComCon

Sample of a CGI Web Page


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2001 ComCon

Sample of Code for Previous Page

WebOut = NewLine+ ''+ '' + ProdCd +''+ ''+ ProdDs +''+ '' + CatCod + ''+ '' + %Char(LndCst) + ''+ '' + %Char(SellPr) + ''+ '' + PrLOrdA + ''+ '' + NoDaysA +''

WriteWebData(WebData : WebDataLen : APIError)

This writes one "detail" line The HTML code is constructed in

the RPG Program.


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2001 ComCon

"Native" CGI problems

The APIs are not as simple as one would likeAnd the documentation is less than wonderful

Generating HTML directly in the program reduces flexibility To change the text, one must change the program

And it is much more difficult to use HTML editors to design the pages

It would be nice to have something like DDS That way only the variable content is handled by the program

But writing such a generalized routine to process HTML text and perform text

substitution is not a trivial task

IBM has an answer

And it is FREE !!

The CGIDEV2 LibraryAvailable for download at www-922.ibm.com


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2001 ComCon

Sample from CGIDEV

: :/$TableRow


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2001 ComCon

So Far......

If you learn RPG IV Some ILE

Some HTML

You can be on the Web in No Time!

Getting to the Web is Easy!!!!!


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2001 ComCon

J avascript

Extend those HTML capabilities

Javascript is NOT full blown Java -

by any means.

Quote of the DayQuote of the Day


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2001 ComCon

WebFacing

DOWProto

P DayOfWeek B

D PI D/Copy 1P0D WorkDate D

D AnySunday S D INZ(D'1995-04-02')

D WorkNum S 7 0

D WorkDay S 1P 0

C WorkDate SubDur AnySunday WorkNum:*DC WorkNum Div 7 WorkNum

C MvR WorkDay

C If WorkDay < 1

C Return WorkDay + 7

C Else

C Return WorkDay

C EndIfP DayOfWeek E

RPG Programenter customer number:_____

Time:8:05 date:Oct 22,2000

?Workstationmanager

Converts DDS to Servlets and JSPs

There is NO change to the RPG Programs


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2001 ComCon

WebSphere Studio


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2001 ComCon

WebSphere Application Server

TCP/IP

HTTPserver

Servlet EngineJDBCRPGCobolEtc.

AdministrativeServer

Database

Any Client,

Any Browser

HTMLWeb

Browser

AdminConsole

EJB Container

Application Server

EJB Client

Servlets

Java Server Pages (JSPs) Enterprise Java Beans (EJBs)


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2001 ComCon

And then there is J ava

Get to grips with OO.... it is very different.

A good grounding in RPG IV and ILE makes it easier to understand.

Get Phone

Get Address

Set Balance

Get Balance

Get Name

Get

Balance

GetAddress

Set

Balance

Set Name

& AddressSet

Balance

A Customer


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2001 ComCon

A Plan of Action

IFS

iSeries

Navigator

SQL

Triggers and

RI

Must Do....... Should Do....... And then Any of.......

Code/400

RPG IV and

ILE

HTML and

CGI

WebFacing

VisualAge for

RPG

OO and Java

WebSphere

Studio,

Javascript

and JSPs


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2001 ComCon

The Learning Curve

0 10 20 30 40 50 60 70 80 90 100

W ork Days

Code/400

RPG IV

ILE

Basic CGI

CGIDEV

Basic WAS

Basic W ebfacing

W ebsphere Studio

OO

Java

Topics

The Learning Curve

Course

Self Teach

Practice

Times are opinion based on the experience of many. "Practice" is to a level of proficiency as opposed to expertise.


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2001 ComCon

How Long Will It Take?

Pick the Route Carefully!!!!!!

Course Self Teach Practice

Code/400 2 5 7

RPG IV 4 10 10

ILE 2 10 80

Basic CGI 1 5 25CGIDEV 2 5 15

Basic WAS 3 10 20

Webfacing 2 5 15

Studio 2 5 10

OO 3 10 100Java 8 20 30


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Questions?

Submit your questions now by clicking on the

Ask A Question button in the left corner

of your presentation screen.

Paul will answer your questions

shortly after the broadcast.

Documents

Skills for the Rpg Prog 2