Basic mapping support example
This example shows the procedure to use the CICS basic mapping support (BMS) in the REXX/CICS environment.
- BMS maps must be assembled and linked into a CICS library. This library must be in the LIBDEF in the CICS region startup JCL.
- If you are going to use the REXX/CICS CONVTMAP command to generate a file structure, the BMS map must be assembled to produce the map DSECT.
- BMS maps must be defined to CICS using Resource Definition Online (RDO).
- If you want to read from or send data to the screen, you need to GETMAIN CICS storage for the length of the map input/output areas. The storage must be initialized to nulls.
- If a field within a file structure is represented by more than one label, then the last label to reference that field in the structure must be used when referencing the field.
This example uses BMS map PANELG. The map definition is as follows.
TITLE 'PANEL GROUP FOR REXX/CICS ' 00000010
PRINT ON,NOGEN 00000020
PANELG DFHMSD TYPE=MAP,LANG=ASM,MODE=INOUT,STORAGE=AUTO,SUFFIX= 00000030
TITLE 'TEST PANEL FOR REXX/CICS ' 00000040
DPANEL1 DFHMDI SIZE=(24,80),CTRL=(FREEKB),MAPATTS=(COLOR,HILIGHT), *00000050
DSATTS=(COLOR,HILIGHT),COLUMN=1,LINE=1,DATA=FIELD, *00000060
TIOAPFX=YES,OBFMT=NO 00000070
DFHMDF POS=(1,1),LENGTH=1,ATTRB=(PROT,BRT) 00000080
DFHMDF POS=(5,27),LENGTH=22,INITIAL='REXXCICS HEADER PANEL1', *00000090
ATTRB=(PROT,NORM) 00000100
DFHMDF POS=(5,73),LENGTH=6,INITIAL='PANEL1',ATTRB=(PROT,NORM) 00000110
DFHMDF POS=(9,6),LENGTH=25, *00000120
INITIAL='PLEASE ENTER YOUR USERID:',ATTRB=(PROT,NORM) 00000130
* DUSERID 00000140
DUSERID DFHMDF POS=(9,32),LENGTH=8,ATTRB=(UNPROT,BRT,IC,FSET) 00000150
DFHMDF POS=(9,41),LENGTH=1,ATTRB=(PROT,NORM) 00000160
DFHMDF POS=(14,6),LENGTH=4,INITIAL='MSG:',ATTRB=(PROT,NORM) 00000170
* DMSG 00000180
DMSG DFHMDF POS=(14,11),LENGTH=29,ATTRB=(UNPROT,NORM,FSET) 00000190
DFHMDF POS=(14,41),LENGTH=1,ATTRB=(PROT,NORM) 00000200
DFHMSD TYPE=FINAL 00000210
END 00000220The map DSECT is as follows. The DSECT is in an MVS™ PDS
named
USER.REXXCICS.MAPS(PANELG).
DS 0H ENSURE ALIGNMENT
DPANEL1S EQU * . START OF MAP DEFINITION
DS 12C . TIOA PREFIX
SPACE
DUSERIDL DS CL2 . INPUT DATA FIELD LEN
DUSERIDF DS 0C . DATA FIELD FLAG
DUSERIDA DS C . DATA FIELD ATTRIBUTE
DUSERIDC DS C . COLOUR ATTRIBUTE
DUSERIDH DS C . HIGHLIGHTING ATTRIBUTE
DUSERIDI DS 0CL8 . INPUT DATA FIELD
DUSERIDO DS CL8 . OUTPUT DATA FIELD
SPACE
DMSGL DS CL2 . INPUT DATA FIELD LEN
DMSGF DS 0C . DATA FIELD FLAG
DMSGA DS C . DATA FIELD ATTRIBUTE
DMSGC DS C . COLOUR ATTRIBUTE
DMSGH DS C . HIGHLIGHTING ATTRIBUTE
DMSGI DS 0CL29 . INPUT DATA FIELD
DMSGO DS CL29 . OUTPUT DATA FIELD
SPACE
DPANEL1E EQU * . END OF MAP DEFINITION
ORG DPANEL1S . ADDRESS START OF MAP
* CALCULATE MAPLENGTH, ASSIGNING A VALUE OF ONE WHERE LENGTH=ZERO
DPANEL1L EQU DPANEL1E-DPANEL1S
DPANEL1I DS 0CL(DPANEL1L+1-(DPANEL1L/DPANEL1L))
DPANEL1O DS 0CL(DPANEL1L+1-(DPANEL1L/DPANEL1L))
ORG
* * * END OF MAP DEFINITION * * *
SPACE 3
ORGThe CONVTMAP command is used to take the DSECT and create a file structure stored in the RFS. The
command is entered as follows:
'CONVTMAP USER.TEST(PANELG) POOL1:\USERS\USER1\PANELG.DATA' The following is the file structure created by CONVTMAP.
00000 ***************************** TOP OF DATA *************************
00001 DUSERIDL 13 2 C
00002 DUSERIDF 15 1 C
00003 DUSERIDA 15 1 C
00004 DUSERIDC 16 1 C
00005 DUSERIDH 17 1 C
00006 DUSERIDI 18 8 C
00007 DUSERIDO 18 8 C
00008 DMSGL 26 2 C
00009 DMSGF 28 1 C
00010 DMSGA 28 1 C
00011 DMSGC 29 1 C
00012 DMSGH 30 1 C
00013 DMSGI 31 29 C
00014 DMSGO 31 29 C
00015 ***************************** BOTTOM OF DATA***********************The following example is exec BMSMAP1. It creates a simple panel that asks for a user ID.
/* This EXEC uses CICS SEND and RECEIVE commands */
/* The panel has two fields USERID and a message */
/* field. The panel is initially displayed with */
/* a message - "USERID must be 8 characters" */
/* GETMAIN storage to be used for data mapping */
/* and initialize */
'PSEUDO OFF'
ZEROES = '00'x
'CICS GETMAIN SET(WORKPTR) LENGTH(90) INITIMG(ZEROES)'
VAR1 = 'USERID must be 8 characters'
/* Copy the REXX variable VAR1 to the GETMAINed storage */
'COPYR2S VAR1 WORKPTR 30'
/* Copy the storage area to REXX variable */
'COPYS2R WORKPTR X 0 90'
'CICS SEND MAP(PANELG) FREEKB ERASE FROM(X)'
'CICS RECEIVE MAP(PANELG) INTO(Y)'
/* Copy Y into the GETMAINED storage area and then copy the data */
/* to REXX variables using the file structure generated */
/* previously by the CONVTMAP command */
'COPYR2S Y WORKPTR 0 90'
'COPYS2R WORKPTR * POOL1:\USERS\USER1\PANELG.DATA'
/* loop until the user enters a USERID exactly 8 characters in */
/* length */
do forever
MUSERID = STRIP(DUSERIDO)
if LENGTH(MUSERID) < 8 then
do
DMSGO = 'Please enter 8 char USERID'
'COPYR2S * WORKPTR POOL1:\USERS\USER1\PANELG.DATA'
'COPYS2R WORKPTR X 0 90'
'CICS SEND MAP(PANELG) FREEKB ERASE FROM(X)'
'CICS RECEIVE MAP(PANELG) INTO(Z)'
'COPYR2S Z WORKPTR 0 90'
'COPYS2R WORKPTR * POOL1:\USERS\USER1\PANELG.DATA'
END
ELSE LEAVE
END
'SENDE'
say ' '
say 'Hello' DUSERIDO', Welcome to REXX/CICS !!'
exitThe BMSMAP1 exec created the following panels.
REXX/CICS HEADER PANEL1 PANEL1
PLEASE ENTER YOUR USERID:
MSG: USERID must be 8 characters
REXX/CICS HEADER PANEL1 PANEL1
PLEASE ENTER YOUR USERID: TEST
MSG: Please enter 8 character USERID