For the latest information on upgrading to and from any versions of CICS TS, see CICS TS V5.6.

Upgrading platforms, applications, policies, and CICS bundles

If you have used platforms, applications, policies, and CICS® bundles in CICS in earlier releases, be aware of the following changes when you upgrade to CICS Transaction Server for z/OS®, Version 5 Release 2.

Subtopics

Requirements for application entry points and operation names
In CICS regions from CICS TS 5.2, applications that are deployed on platforms must have application entry points declared for all the resources that are an access point to the application. Application entry points are now used to control users' access to different versions of an application that is deployed on a platform. An application that defines a PROGRAM resource cannot be made available to callers in CICS TS 5.2 regions unless it declares an application entry point for that resource.
Making applications and CICS bundles available
A new availability status has been introduced for applications that are deployed on platforms, so that you can install and verify installation of an application version before making the application version available to users of the platform. Applications that are deployed on platforms therefore now require an additional step to make them available for users in CICS regions from CICS TS 5.2. After installing and enabling the application, you must perform the Make Available action in the CICS Explorer® to make the application available to users.
Changes to resources defined in CICS bundles
You can now create resource definitions in CICS bundles for the additional CICS resource types FILE, JVMSERVER, PIPELINE, TCPIPSERVICE, and WEBSERVICE. You can issue commands to change the status of dynamically generated JVMSERVER and TCPIPSERVICE resources. A URIMAP resource defined in a CICS bundle can be specified as an application entry point to control access to the service that it provides.
Private resources for application versions on platforms
When you define certain CICS resources in CICS bundles as part of an application installed on a platform, the resources are private to that version of that application. You can therefore install more than one resource of those types with the same name, at the same time.
Multi-versioning for applications deployed on platforms
You can now install and manage multiple versions of an application at the same time on the same platform instance. New versions of an application can be deployed to the platform without the need to disable or remove the previous version. When you have installed and enabled a version of an application, you take an additional step to make it available to users.
Application context enhancements
You can now use the application context of the current application set onto the task instead of the initial application context of the first application set onto the task.
New policy rule types and rule items
Some new policy rule types and rule items are available to help you manage the run time behavior of your CICS applications and platforms.

Parent topic: Upgrading CICS Transaction Server

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Last updated: Saturday, 15 June 2019