The Natural CICS Interface supports LE programs. This document contains information on LE enablement of Natural under CICS.
It covers the following topics:
If supported by the CICS Transaction Server for z/OS installed at your
site, the Natural CICS Interface is LE-compliant by itself, that is, a Natural
CICS Interface task can directly CALL (standard linkage
conventions, not CICS LINK) LE programs written in languages such as C, COBOL
or PL/I, when
SET
CONTROL 'P=LS' has been
specified,
SET
CONTROL 'P=S' has been
specified,
NCIPARM parameter SLCALL=YES has
been specified and the program to be called is not a CICS program.
To make the Natural CICS Interface LE-compliant, set the CICS translator
option LEASM when installing the Natural CICS Interface starter module
NCISTART and the Natural CICS Interface RPC server front-end
module NCISFED (see the corresponding step in
Installing the
Natural CICS Interface on z/OS in the Natural
Installation for z/OS documentation or
Installing the
Natural CICS Interface on z/VSE in the Natural
Installation for z/VSE documentation); this CICS
translator option must not be set for any other Natural CICS Interface
component or user exit.
Even if the Natural CICS Interface is not LE-compliant with the CICS
Transaction Server installed at your site (due to missing support for
LE-enabled assemblers), it still provides LE functionality for LE-compliant 3GL
front-end program calls; see the sample program XNCIFRCN (COBOL),
XNCIFRPN (PL/I) or XNCIFRDN (C ), and the section
Natural CICS Sample
Programs.
Alternatively, LE compliance of the Natural CICS Interface nucleus can
be achieved by linking one of the three delivered LE-compliant front-end stubs
NCILEFC (COBOL), NCILEFP (PL/1) or
NCILEFD (C) to the Natural CICS Interface nucleus; in this case
the 3GL front-end stub has to be INCLUDEd before the
NCISTART module.
In order to notify the Natural CICS Interface about the underlying LE
enclave, the LE-compliant 3GL front-end program first must call the NCI LE stub
program NCILESTB by passing the CICS TWA address (see the samples
mentioned above); this program checks if it is running LE-enabled, that is, if
an LE enclave does exist, and sets up appropriate information for the Natural
CICS Interface in the CICS TWA. For the Natural CICS Interface to run LE
compilant, a front-end caller therefore must not pass front-end parameters in
the CICS TWA.
In addition, for LE compliance of the Natural CICS Interface nucleus,
the CICS-supplied EXEC interface stub
DFHELII has to be used for installation (see
Installing
Natural CICS Interface on z/VSE in the Natural
Installation documentation), rather than the
DFHEAI stub module.