Chapter 1: Overview

This chapter describes Mainframe Subsystem Support within Micro Focus product.

What is Mainframe Subsystem Support?

Mainframe Subsystem Support is a facility available with reUZE Developer and reUZE Server that enables CICS, IMS and JCL applications that have been migrated from the mainframe to be maintained, developed and deployed on Windows platforms.

You use reUZE Developer for maintaining your CICS, IMS and JCL applications. If you are working with CICS, you can edit and compile BMS maps, and also compile the CICS programs, using the Micro Focus CICS preprocessor, which translates the CICS commands into native code. If you are working with IMS, you can edit and generate your DBDs, MFSs and PSBs, and compile your IMS programs. If you are working with JCL, you can edit and create JCL, and build projects containing the programs that the JCL references. When the application is ready to run, you then deploy it to reUZE Server.

reUZE Developer is always the first choice for maintenance and development regardless of the platform to which the application will be deployed.

You use reUZE Server for running your CICS, IMS and JCL applications, for testing and for production use. reUZE Server also provides facilities for monitoring and controlling your applications and for other tasks such as maintaining CICS resource definitions and viewing the system catalog and spool queues.

Licensing

For information about development licensing, see your reUZE Developer Licensing topics. For information about deployment licensing (that is, reUZE Server licensing), see Deployment Licensing.

Developing and Testing the Application

The process used by developers using reUZE Developer as the development environment with reUZE Server as the deployment environment is as follows:

Use reUZE Developer to maintain and compile BMS mapsets for CICS or generate DBDs, MFSs and PSBs for IMS.
Use reUZE Developer to maintain resource definitions.
Maintain and compile CICS, IMS and JCL programs in reUZE Developer.
They deploy the application to reUZE Server.
They debug the application in the reUZE Developer IDE.

Steps 3 through 6 need to be repeated as required to get the application working correctly.

Developers need to have some familiarity with running programs in reUZE Server and the facilities provided therein specifically for monitoring CICS, IMS and JCL applications.

Running the Application

Once the application is working correctly, administrators look after the running and monitoring of the application in reUZE Server. They need to:

Maintain resource definitions for CICS; they can do this either in reUZE Server or reUZE Developer. The format is portable between environments. There are also import and export tools which enable the downloading of the definitions into a text file for more convenient editing.
Control and monitor the running of the application, within the context of reUZE Server.

The administration tool ESMAC, Enterprise Server Monitoring and Control, provides facilities for maintaining resource definitions and monitoring and controlling CICS, IMS and JCL applications. Many of its facilities are also available for non-MSS applications running in Enterprise Server. For detailed information about running CICS, IMS and JCL applications in reUZE Server, see the chapters Administering CICS-enabled Enterprise Servers , Administering IMS-enabled Enterprise Servers and Administering JCL-enabled Enterprise Servers.

You also need to use facilities in the main reUZE Server interface. For more information see the main reUZE Server Configuration and Administration Guide .

Event Manager

The JCL support in Mainframe Subsystem Support includes an event manager, which provides support for third-party products such as schedulers.

When an enterprise server is started, it can call a user exit program, which on this first call can register an interest in particular types of events (for example, abends). Then whenever an event of any of the registered types occurs, the event manager will call the user exit program to process it. This user exit program can be a third party tool, such as a scheduler.

For further information, please contact your sales representative.