Using the Fixed-Form Call Operations. . . . . . . . . . . . . . . . . . 148. . . . .

Examples of CALL and CALLB . . . . . . . . . . . . . . . . . . . .150. . . . .

Passing Parameters Using PARM and PLIST. . . . . . . . . . . . . .150. . .

Returning from a Called Program or Procedure. . . . . . . . . . . . . .152. . .

Returning from a Main Procedure. . . . . . . . . . . . . . . . . . .152. . . . .

Returning from a Subprocedure. . . . . . . . . . . . . . . . . . . .154. . . . .

Returning using ILE Bindable. APIs. . . . . . . . . . . . . . . . . 155. . . . .

Using Bindable APIs. . . . . . . . . . . . . . . . . . . . . . . . . 155. . . . . . . .

Examples of Using Bindable .APIs. . . . . . . . . . . . . . . . . 156. . . . .

Calling a Graphics Routine. . . . . . . . . . . . . . . . . . . . . . 156. . . . . . .

Calling Special Routines. . . . . . . . . . . . . . . . . . . . . . . .157. . . . . . .

Multithreading Considerations. . .

. . . . . . . . . . 157

How

to

Share

Data Across More

Than One. .Module. . . . . . . . . 158. .

How

to

Avoid

Deadlock Between

.Modules. . . . . . . . . . . . . . 159. . . .

Debugging

and

Exception

Handling

 

 

 

 

 

. . . . . . . . . . . . . . . . . . . . . . . .161

 

 

Chapter 11.

Debugging Programs

 

. . . . . . . . . . . 163

 

 

The ILE Source Debugger. . . . . . . . . . . . . . . . . . . . . . 163

 

 

 

Debug Commands

 

. . . . . . . . . . . . . . . 164

 

 

Preparing a Program for Debugging. . . . . . . . . . . . . . . . . . .166

 

 

 

Creating a Root Source .View. . . . . . . . . . . . . . . . . . . 167

 

 

 

Creating a COPY Source View. . . . . . . . . . . . . . . . . . . .168

 

 

 

Creating a Listing .View. . . . . . . . . . . . . . . . . . . . . . 168

 

 

 

Creating a Statement View. . . . . . . . . . . . . . . . . . . . . .169

 

 

Starting the ILE Source Debugger. . . . . . . . . . . . . . . . . . . .170

 

 

 

STRDBG Example

 

. . . . . . . . . . . . . . . 171

 

 

 

Setting Debug Options. . . . . . . . . . . . . . . . . . . . . . . 171

 

 

Adding/Removing Programs from a Debug Session. . . . . . . . . . . . .172. .

 

 

 

Example

of

Adding

a Service Program to a Debug. . .Session. . . . .173

 

 

 

Example of Removing ILE Programs from a Debug . Session. . . . . . .173

 

 

Viewing the Program Source. . . . . . . . . . . . . . . . . . . . . .174

 

 

 

Viewing a Different Module. . . . . . . . . . . . . . . . . . . . .175

 

 

 

Changing the View of a .Module. . . . . . . . . . . . . . . . . . .176

 

 

Setting

and

Removing

Breakpoints. . . . . . . . . . . . . . . . . . .177

 

 

 

Setting and Removing Unconditional Job Breakpoints. . . . . . . . . . 178. .

 

 

 

Setting

and

Removing

Unconditional Thread Breakpoints. . . . . . . . .180.

 

 

 

Setting and Removing Conditional Job Breakpoints. . . . . . . . . . . 181. .

 

 

 

National

Language

Sort

Sequence

(NLSS). . . . . . . . . . . . . . .183. . .

 

 

 

Setting and Removing Job Breakpoints Using Statement. .Numbers. . 185

 

 

 

Setting

and

Removing

Conditional

Thread Breakpoints. . . . . . . . . .187.

 

 

 

Removing All Job and Thread Breakpoints. . . . . . . . . . . . . . .188. . .

 

 

Setting

and

Removing

Watch Conditions. . . . . . . . . . . . . . . . .188. . . .

 

 

 

Characteristics of Watches. . . . . . . . . . . . . . . . . . . . . .189

 

 

 

Setting

Watch

Conditions. . . . . . . . . . . . . . . . . . . . . .190

 

 

 

Displaying Active Watches. . . . . . . . . . . . . . . . . . . . . .192

 

 

 

Removing Watch Conditions. . . . . . . . . . . . . . . . . . . . .192

 

 

Example of Setting a Watch Condition. . . . . . . . . . . . . . . . . 193

 

 

Stepping Through the Program Object. . . . . . . . . . . . . . . . . 194

 

 

 

Stepping

Over

Call

Statements. . . . . . . . . . . . . . . . . . . .195

 

 

 

Stepping

Into

Call

Statements. . . . . . . . . . . . . . . . . . . . 196

 

 

 

Displaying Data and Expressions. . . . . . . . . . . . . . . . . . .199

 

 

Changing

the

 

Value

of

Fields. . . . . . . . . . . . . . . . . . . . . .208

vi ILE

RPG

for AS/400

Programmer's

Guide

 

 

 

 

Page 7 Page 9
Page 8
Image 8
IBM AS/400 manual Vi ILE, Exception
Page 7 Page 9

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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