ILE Application Using CRTRPGMOD

¹An advanced application

The effect of ILE is the same as described in “Effect of ILE” on

You may want to read about the basicILEILEConconceptsbeforein using this approach.

Method

Because

this

approach

is

the most flexible, it includes a number

of

you

might

create

an

ILE

application.

The

following

list

describes the

you

may

need

to

perform:

 

 

 

 

 

 

 

1. Create

a

module

from

each

source

member using

the

appropriate

com

for

example, CRTRPGMOD

for RPG

source,

CRTCLMOD for CL

source, etc..

2. Determine the ILE characteristics for the application, for example:

¹

Determine

which

module

will

contain

the

procedure

that will

be

th

 

point

for

the

application.

The

module

you

choose

as

the

entry

m

 

first

one

that

you want

to get control.

In

an

OPM

application,

th

 

the

command

processing

program,

or

the

program called

because

a

 

item

was

selected.

 

 

 

 

 

 

 

 

 

 

 

 

 

¹

Determine

the

activation

group

the application will run in. (Most l

 

will want to

run

in

a

named

activation

group,

where

the name

is

 

 

the

name

of

 

the

application.)

 

 

 

 

 

 

 

 

 

 

¹

Determine

the

exports

and

imports

to

be

used.

 

 

 

 

 

3. Determine if any of the modules

will be bound together to create

program.

If

so,

create

the

service

programs

using

CRTSRVPGM.

 

 

 

4. Identify

the

 

names

of

the binding directories, if any, to be us

It

is

assumed

 

with

this

approach that if you are using a binding

one

that

is

already created for you. For example, there may be

service

program

 

that

you

may

want

to

bind

to

your

source. Consequen

you need

to

know

is

the

name

of

the binding

directory.

 

 

 

5.Bind the appropriate modules and service programs together using CRTP specifying values for the parameters based on the characteristics step 2.

An

application

created using this approach can run fully protected,

tha

own

activation

group.

Furthermore, it

can be

updated easily

through

us

UPDPGM or UPDSRVPGM commands. With these commands you can add

or

 

replace one

or more

modules without

having to

re-create the

program

ob

Single-Language ILE Application

Scenario

 

 

 

 

 

 

 

In

this

scenario

you

compile

multiple

source files

into modules

and bind

one

program

that

is called

by

an ILE

RPG program.

Figure 8 on

page 29

the

run-time

view

of

this

application.

 

 

 

28 ILE RPG for AS/400 Programmer's Guide

Page 52
Image 52
IBM AS/400 manual Scenario, Single-Language ILE Application

AS/400 specifications

The IBM AS/400, now known as the IBM iSeries, is a midrange computer system that has been a cornerstone of enterprise computing since its introduction in 1988. Designed to provide a robust platform for business applications, the AS/400 is celebrated for its reliability, scalability, and integrated database capabilities.

One of the key features of the AS/400 is its Integrated Operating Environment, which blends hardware and software resources seamlessly. This integration allows businesses to execute diverse workloads, ranging from traditional applications to modern web-based services, all on a single platform. The operating system, OS/400 (now IBM i), offers a rich set of APIs and tools for developers, simplifying application development and management.

Another standout characteristic of the AS/400 is its built-in database, DB2 for i. This powerful relational database management system allows for efficient data handling and provides advanced features such as support for SQL, XML, and JSON, making it easier for businesses to manage their data and integrate it with other systems. The database's tight integration with the operating system enables high performance and security.

In terms of scalability, the AS/400 can accommodate small businesses as well as large enterprises, with the ability to support hundreds of users simultaneously. Its architecture allows for easy upgrades in hardware, meaning that organizations can scale their systems without replacing the entire infrastructure.

Security is another critical attribute of the AS/400. With a sophisticated security model, it offers built-in user authentication, access control, encryption, and auditing capabilities to protect data and applications from unauthorized access.

The AS/400 also supports multiple programming languages, including RPG, COBOL, Java, and PHP, giving organizations the flexibility to choose the development tools that best fit their needs. This diversity helps maintain legacy applications while also developing new ones that leverage modern technologies.

Moreover, the platform supports both traditional green-screen interfaces and modern graphical user interfaces, allowing organizations to transition smoothly into contemporary user experience paradigms.

Overall, the IBM AS/400 stands out as a resilient, flexible, and secure computing platform that enables organizations to effectively manage their business operations, streamline processes, and adapt to changing market demands. Its unique combination of integrated features and capabilities ensures that it remains relevant in today's fast-paced technology landscape.