A Strategy to Avoid

Job

 

XYZ Activation Group

 

*PGM(X)

 

CL *MODULE(X1)

 

 

*SRVPGM(Y)

RPG *MODULE(X2)

RPG

 

*SRVPGM(Z)

 

C *MODULE(Z1)

 

CL *MODULE(Z2)

Figure 10. Advanced Application

The calls from program X to service programs Y and Z are static ca

See “Effect of ILE” on page 26 for details on the effects of ILE application handles calls, data, files and errors.

Related Information

Two-step

creation process

Chapter 7, “Creating a Program with the

 

 

 

CRTRPGMOD

and

CRTPGM

Commands”

 

 

 

on page 73

 

 

 

Activation

groups

“Managing Activation Groups” on page 109

ILE static

binding

Chapter 10,

“Calling

Programs and

 

 

 

Procedures”

on

page 127;ILE alsoCon-

 

 

 

cepts

 

 

 

 

Exception

Handling

Chapter 12,

“Handling Exceptions” on

 

 

 

page 217; alsoILE

Concepts

Service

programs

Chapter 8, “Creating a Service Program” on

 

 

 

page 91;

alsoILE

Concepts

Updating

a

Program

“Using the UPDPGM Command” on

 

 

 

page 87

 

 

 

 

A Strategy to Avoid

ILE

provides

many

alternatives

for creating programs and applications.

H

not

all

are equally

good. In

general,

you should avoid a

situation

w

tion

 

consisting

of

OPM and ILE programs is split across the OPM defaul

group

and a

named

activation

group. In

other words, try

to avoid

t

shown

in

Figure 11

on

page 32.

 

 

 

Chapter 3. Program Creation Strategies31

Page 54 Page 56
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IBM AS/400 manual Strategy to Avoid
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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.
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