CICS Interface

This section describes the CICS Interface used by Substation ES to pass data between TIBCO messaging applications and CICS applications in the z/OS environment.

  • Overview
    Substation ES CICS Interface manages the communications and coordinates the data exchange between Substation ES and the CICS transaction processing system.
  • Configurations
    One or more CICS interface instances can operate and coexist concurrently within one Substation ES region. Each CICS interface is restricted to communicating with only one CICS region at a time.
  • Message Flow
    CICS Interface supports two types of message flow: requests or replies, and triggers.
  • High Volume Triggers
    The CICS High Volume Trigger (HVT) capability is available for use when a high volume of messages or queue records are to be sent, or when more than 32 KB of information needs to be sent from applications.
  • CICS Methods of Invocation
    Multiple methods of invocation are available to access and work with CICS applications and resources: containers, communication areas, transient data, storage queues, and most other entities available in CICS.
  • Components
    Substation ES CICS Interface components interact with Substation ES servers in the CICS region.
  • Data Communications
    Communications between TIBCO Substation ES and the CICS region require a Substation communication area (COMMAREA) with a maximum size of 32,000 bytes or characters. This limit is imposed by CICS for COMMAREAs.