Setting and Removing Watch Conditions

‡

Work with Watch

..........................................................

:

 

 

 

Display Watch

 

 

: DEBUGGER

:

 

 

 

 

 

 

 

:

:

Watch Number ....

:

1

 

 

 

:

:

Address

:

080090506F027004

 

 

:

:

Length

:

4

 

 

 

:

:

Number of Hits ..

:

0

 

 

 

:

:

 

 

 

 

 

 

 

:

: Scope when watch was set:

 

 

 

:

:

Program/Library/Type:

PAYROLL

ABC

*PGM

:

:

 

 

 

 

 

 

 

:

:

Module...

:

PAYROLL

 

 

 

:

:

Procedure:

PAYROLL

 

 

 

:

:

Variable.:

SALARY

 

 

 

:

:

 

 

 

 

 

 

 

:

:

F12=Cancel

 

 

 

 

 

 

:

:

 

 

 

 

 

 

 

:

..........................................................

Bottom

Command

===>____________________________________________________________________

ˆF3=Exit F4=Prompt F5=Refresh F9=Retrieve F12=Cancel

Figure 89. Example of a Display Watch Window

—

˜

¹To specify a variable or expression to be watched, type:

WATCH expression

on the debug command line.

This command requests a breakpoint to be setexpressionif the isvalue of changed from its current value.

Note: expression is used to determine the address of the storage watch and must resolve to a location that can be assigned t example:

%SUBSTR(X 1 5)

The scope of the expression variables in a watch is defined by recently issued QUAL command.

¹ To set a watch condition and specify a watch length, type:

WATCH expression : watch length

on a debug command line.

Each watch allows you to monitor and compare a maximum of 128 byt contiguous storage. If the maximum length of 128 bytes is excee condition will not be set, and the debugger issues an error mess

By default, the length of the expression type is also the lengt

comparison operation. watchThe-length parameteroverrides this default. It determines the number of bytes of an expression that should be determine if a change in value has occurred.

For example, if a 4-byte integer is specified as the variable, length parameter, the comparison length is four bytes. However, if length parameter is specified, it overrides the length of the e determining the watch length.

Chapter 11. Debugging Programs191

Page 214 Page 216
Page 215
Image 215
IBM AS/400 manual ¹ To specify a variable or expression to be watched, type, Payroll ABC PGM
Page 214 Page 216

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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