CPG2 Modernization Guide

CPG2 is a code generation tool that translates free-form code into CICS/Assembler code. It uses a pre-compiler to convert CPG2 structures into CPG1, which then generates the final CICS/Assembler code.

CPG2 is primarily a tool set designed to automate the generation of CICS/Assembler code. It simplifies the development process by allowing developers to work with free-form code, which is then translated into the required CICS/Assembler format.

Organizations that rely on CICS and Assembler for their mainframe applications can benefit from CPG2. This includes enterprises in industries such as banking, finance, and insurance that have legacy systems built on these technologies.

A company should consider using CPG2 when they need to maintain or extend existing CICS/Assembler applications but want to improve developer productivity. It is particularly useful when modernizing legacy systems or integrating them with newer technologies.

Alternatives to CPG2 include other code generation tools and manual coding. Some organizations may choose to rewrite their applications in a different language or use a different framework altogether. However, CPG2 allows continued use of existing CICS/Assembler skills.

CPG2 requires a mainframe environment running z/OS or zVSE/VSEn. It integrates with CICS and generates Assembler code, so these subsystems must be present and configured correctly.

CPG2 runs within an LPAR on z/OS or zVSE/VSEn. It is dependent on the specific versions of CICS and Assembler installed on the system. Ensure compatibility between CPG2 and the underlying system software.

CPG2 can reduce development time and costs by automating the generation of CICS/Assembler code. It allows developers to focus on the business logic rather than the low-level details of the CICS and Assembler environments.

By automating code generation, CPG2 reduces the risk of manual coding errors. This leads to more reliable and stable CICS/Assembler applications, which can improve business operations.

CPG2 leverages the security features of the underlying CICS and z/OS or zVSE/VSEn environments. Access to CPG2 functions and generated code is controlled through standard mainframe security mechanisms.

CPG2 integrates with existing mainframe security systems such as RACF, ACF2, or Top Secret. These systems control access to CPG2 resources and the generated CICS/Assembler code.

CPG2 requires ongoing monitoring to ensure that the code generation process is running smoothly. Regular maintenance is needed to apply updates and address any compatibility issues with the underlying CICS and Assembler environments.

Implementing CPG2 can be challenging due to the complexity of the CICS and Assembler environments. It requires expertise in both CPG2 and the underlying mainframe technologies. Thorough testing is essential to ensure the generated code functions correctly.