Developing for external interfaces

CICS® allows you to develop applications to communicate with external data and resources, such as Db2®, IBM® MQ, IMS DBCTL, data tables, and ONC RPC applications.

The 3270 bridge
The 3270 bridge provides an interface so that you can run 3270-based CICS transactions without a 3270 terminal. The 3270 terminal and end-user are replaced by an application program, known as the client application. Commands for the 3270 terminal in the CICS 3270 user transaction are intercepted by CICS and replaced by a messaging mechanism that provides a bridge between the client application and the CICS user transaction.
The external CICS interface
The external CICS interface (EXCI) is an application programming interface that enables a non-CICS program (a client program) running in z/OS® to call a program (a server program) running in a CICS region and to pass and receive data by using a communications area or by using a channel and a set of containers. The CICS application program is started as if linked to by another CICS application program.
Developing CICS ONC RPC applications
This section tells you how to write CICS ONC RPC user-replaceable programs. It describes the general process of development, including details of the interfaces to the converter functions.

Parent topic: Developing applications