*=================================================================*

 

* *PSSR: Error Subroutine for the procedure

*

 

*=================================================================*

C

*PSSR

BEGSR

 

 

C

 

 

EXCEPT

InPssr

 

C

 

 

EXCEPT

Cancelling

 

 

C

 

ENDSR

'*CANCL'

 

 

*=================================================================*

 

* Procedure Output

 

 

*

 

*=================================================================*

OQSYSPRT

E

ImBack

 

 

O

 

 

 

 

'I''m Back'

OQSYSPRT

E

InPssr

 

 

O

 

 

 

 

'In PSSR'

OQSYSPRT

E

Cancelling

 

O

 

 

 

 

'Cancelling...'

 

 

 

 

 

Figure

117

(Part 3

of 3).

Source for Registering a Condition Handler

If you want to try these procedures, follow these steps:

1.To create the procedure RPGHDLR, using the source shown in Figure page 239, type:

CRTRPGMOD MODULE(MYLIB/RPGHDLR)

2.To create the procedure SHOWERR, using the source shown in Figure page 242, type:

CRTRPGMOD MODULE(MYLIB/SHOWERR)

3. To create the program, ERRORTEST, type

CRTPGM PGM(MYLIB/ERRORTEST) MODULE(SHOWERR RPGHDLR)

4. To run the program ERRORTEST, type:

OVRPRTF FILE(QSYSPRT) SHARE(*YES)

CALL PGM(MYLIB/ERRORTEST)

 

The output is shown below:

HDLR: In Handler for SHOWERR

HDLR: Handling...

I'm Back

HDLR: In Handler for SHOWERR

HDLR: Percolating...

In PSSR

Cancelling...

Using

Cancel

Handlers

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cancel handlers provide an important

function

by allowing

you

 

to

get

cont

 

 

clean-up and recovery actions when

call

stack

entries

are

terminated

by

 

 

other than a normal return. For example, you might want one

to

get

cont

 

 

procedure ends via a system request '2', or because an

 

inquiry

messa

 

 

answered with 'C' (Cancel).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The

Register Call

Stack Entry

Termination

User

Exit

Procedure

(CEERTX)

and

 

 

Call Stack Entry Termination User Exit Procedure

(CEEUTX)

ILE

bindable

APIs

 

 

provide a

way of

dynamically

registering a

user-defined

routine

to

be

 

 

call

stack entry for which it is

registered

is

cancelled.

Once

regis

244

ILE RPG

for AS/400

Programmer's

Guide

 

 

 

 

 

 

 

 

 

 

 

 

 

Page 267 Page 269
Page 268
Image 268
IBM AS/400 manual 244, Cancel Handlers, Ceertx, Ceeutx ILE
Page 267 Page 269

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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