This document describes how to install the CICS connection for a Natural Development Server (NDV) running under z/OS in batch mode.
The following topics are covered:
For details, refer to the section Prerequisites.
To install the Natural Development Server CICS Adapter, perform the following steps:
(Job I005, Steps 8405, 8406, 8410, 8411)
The Natural Development Server load library must be defined in the CICS
DFHRPL
concatenation.
The CICS TCP/IP environment can be customized using the configuration
macro EZACICD
in the EZACONFG
configuration data set
or the configuration transaction EZAC
. This section describes
the usage of the transaction EZAC.
Customize the standard listener CSKL
of the CICS socket
interface using the CICS transaction EZAC,ALTER,LISTENER
and, on
the second screen, define NATUXRFE
in the SECEXIT
.
For impersonation with pass phrases an enhanced listener is required.
Customize an existing enhanced listener or define a new one using the CICS
transaction EZAC,DEFINE,LISTENER
with TRANID CSEL
(or
another name of your choice) and FORMAT ENHANCED
. Customize this
enhanced listener by altering the settings on the second screen as follows:
CSTRANid ===> NRFE CSSTTYPe ===> KC CSDELAY ===> 000000 MSGLENgth ===> 000 PEEKDATa ===> NO MSGFORMat ===> EBCDIC USEREXIT ===> NATUXRFE GETTID ===> NO USERID ===>
The definition of SECEXIT=NATUXRFE
is mandatory when an
enhanced listener is used or when the Natural Development Server is started
with impersonation (parameter SECURITY_MODE
).
Start the listener using the CICS transaction EZAO
.
To use the IPv6 internet protocol, additionally set
AF=INET6
.
The following CICS resource definitions are required:
Define the CICS transaction for the remote front-end. This
transaction name is an arbitrary name which must be defined in the NDV
configuration parameter RFE_CICS_TA_NAME
. This document
uses the transaction name NRFE
.
DEFINE TRANSACTION(NRFE) GROUP(ndvgroup) PROGRAM(NATCNRFE) TWASIZE(128) RESTART(NO) TASKDATAKEY(USER) TASKDATALOC(ANY)
Define the programs NATCNRFE
, NATLRGWO
and
NATUXRFE
:
DEFINE PROGRAM(NATCNRFE) GROUP(ndvgroup) LANGUAGE(C) DATALOCATION(ANY) EXECKEY(USER)
DEFINE PROGRAM(NATLRGWO) GROUP(ndvgroup) LANGUAGE(C) DATALOCATION(ANY) EXECKEY(USER)
DEFINE PROGRAM(NATUXRFE) GROUP(ndvgroup) LANGUAGE(LE370) DATALOCATION(ANY) EXECKEY(CICS)
NATUXRFE
must be defined with EXECKEY(CICS)
because the transaction CSKL
is defined with
TASKDATAKEY(CICS)
and the program NATUXRFE
is part of
the calling chain initiated by CSKL
. This also applies if another
transaction defined with TASKDATAKEY(CICS)
is used to invoke
NATUXRFE
.
In addition, when using the CICS open transaction environment (OTE),
set the following parameters for NATCNRFE
and
NATUXRFE
:
API(OPENAPI) CONCURRENCY(THREADSAFE)
This is required, for example, if the parameter
OTE=YES
is set for the configuration macro
EZACICD
with TYPE=CICS
for the CICS region, or if the
parameter is set with the transaction EZAC,ALTER,CICS
.
The values of API
, CONCURRENCY
and
EXECKEY
for NATCNRFE
must be the same as for the
environment-dependent nucleus of Natural because Natural is called by
NATCNRFE
using standard linkage conventions (direct branch using a
BASR instruction) instead of an EXEC CICS LINK
command.
You need not adapt the program definition of NATLRGWO
for the CICS OTE.
For DB2 access, a DB2 plan name must be defined. If you have not
specified a DB2 plan name for pool threads in the DB2CONN
resource
definition, the transaction specified in
RFE_CICS_TA_NAME
and its associated DB2 plan name must
be defined to CICS with a DB2TRAN
and/or DB2ENTRY
resource definition.
Note:
The dynamic plan selection provided by the Natural for DB2
interface must not be used.
For DB2 access, the authorization ID under which the NDV CICS
transaction is accessing DB2 must have the necessary privileges for DB2 access.
The authorization ID to be used is specified in the DB2ENTRY
resource definition. If you choose the USERID
option, the user ID
of the CICS system will be used because the NDV CICS transactions are running
under the user ID of the CICS system.
The sample JCL containing the following member defines all necessary CICS entries:
NDVCONFC
Job I009, Step 8411, create member NDVCONFC
for CICS
server
(Job I054, Step 8420)
The NDV object modules must be linked with the necessary runtime extensions of your CICS installations into executable load modules.
Notes:
NATCNRFE
applies to two different
products, the Natural Development Server and the Natural Web I/O Interface
Server (NWO). So if you have already installed NWO, the module
NATCNRFE
might already be there. However, it does not matter if
you reinstall NATCNRFE
with the Natural Development Server because
the resulting module from either installation is the same.
NATCSRFE
(referenced in the configuration
via FRONTEND_NAME=NATCSRFE
) has already been linked in the prior
steps of batch installation.
See sample job NDVI054
on dataset
NDVvrs.JOBS
.
Job I200, Step 8416, create startup procedure for CICS server
In order to dispatch the NDV Natural sessions in CICS, you must adapt
the configuration file of your development server running under z/OS in batch
mode. For this purpose, two sample JCL members (NDV I009C
and NDV
CONFC
) are available.
Refer to Configuring the Natural Development Server CICS Adapter and to Configuring the Natural Development Server.