OTMA uses the z/OS® Cross Coupling Facility (XCF) to provide access to IMS from an OTMA client. To access a service through XCF, you must specify a data store name on the IMS node.
IMS Connect is an OTMA client
that exposes a TCP/IP interface. IBM Integration Bus uses
the IMS TM Resource Adapter,
which connects to IMS through IMS Connect. To connect to IMS Connect, you must specify a host
name and port number. If the IMS system
is configured to authenticate users by using a System Authorization
Facility (SAF) product, such as RACF®,
you must specify a user ID and password. You can use the mqsisetdbparms command to set
a user ID and password for an IMSConnect configurable service. For
detailed information about how to configure IMS Connect for security, see the IMS Connect Security Support topic
in the 
IBM Information Management Software for z/OS Solutions product documentation.
The IMSRequest node can use an identity that is present on an input message, and propagate it to IMS, by using the Propagate property on the security profile that is defined for the node. For more information, see Propagating security credentials to IMS.
Some restrictions exist for the OTMA environment that affect the
range of IMS applications with
which IBM Integration Bus can interact. For
example, OTMA cannot update the IMS main
storage database (MSDB) because it has read only access to the database.
For detailed information about the restrictions for the OTMA environment,
see the OTMA restrictions topic in the IBM Information Management Software for z/OS Solutions product documentation.
Using configurable services for IMS nodes
You can configure IMS nodes to get connection details from a configurable service. For details about creating, changing, reporting, and deleting the configurable services, see Changing connection information for the IMSRequest node.
You can also use the IMSConnect configurable service to configure the IMSRequest node to use Secure Sockets Layer (SSL) protocol. For more information, see Securing the connection to IMS by using SSL.
Last updated Friday, 21 July 2017