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install required CICS and IMS adapters
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define queues
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set up distributed queuing
Customization is described in detail in the
MQSeries for MVS/ESA System
Management Guide
. Only the steps which are related to migration are discussed
in some more detail in the following sections.
After the installation and customization has been completed, you can use an
installation verification program (IVP) supplied with the product to verify that the
installation has been completed successfully. Details of the IVP and
customization are given in the
MQSeries for MVS/ESA System Management
Guide
.
9.5.1.3 CICS Considerations
The CICS execution environment is the only environment for VSE/ESA based
MQSeries applications. Naturally it will, therefore, be the main migration target
environment.
There is a major difference between MQSeries under VSE/ESA and under
OS/390:
•
Under VSE/ESA MQSeries itself and MQSeries applications run under CICS.
Therefore, MQSeries resources (such as programs, queues) must be defined
in CICS/VSE. Access to both MQSeries and CICS resources from an
application (which includes both CICS commands and MQI calls) does not
require additional installation or customization effort.
•
Under OS/390 MQSeries runs in an address space independent of CICS. To
allow CICS applications to access MQSeries resources (through API calls)
the CICS adapter must be installed and customized in the respective CICS
region. The CICS adapter connects a CICS subsystem to an MQSeries
subsystem, enabling CICS application programs to participate in
message-driven processing.
The CICS adapter provides two main facilities:
− a set of control functions for use by system programmers and
administrators to manage the adapter.
Control functions let you manage the connections between CICS and
MQSeries dynamically. They may be invoked using the CICS adapter
panels, from the command line, or from a CICS application. You can use
the adapter′s control function to:
- start, stop and modify a connection to a queue manager
- display the current status and statistics of a connection
- start and stop an instance of the task initiator transaction, CKTI
- display details of the current instances of CKTI
- display details of the CICS tasks currently using the adapter.
− MQI support for CICS applications.
For performance, the CICS adapter can handle up to eight MQI calls
concurrently. For transaction integrity, the adapter fully supports
syncpointing under the control of the CICS syncpoint manager. The
adapter also supports security checking of MQSeries resources when
used with an appropriate security management product, such as RACF.
The adapter provides high availability with automatic reconnection after
Chapter 9. Telecommunications Subsystems 201