cics_trianing class_04.ppsx

7/27/2019 CICS_Trianing Class_04.ppsx

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IBM MAINFRAMES

CICS Training Class -04


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Cursor Positioning Technique

Cursor positioning technique is the process of positioning the cursor

at a particular place on the screen

In CICS we have three types :

1. Static cursor positioning

2. Symbolic cursor positioning

3. Relative cursor positioning Dynamic ositioning

In static we use IC option co!e! along with the attrb parameter of

D"#$D" macro

%e nee! to co!e MOVE-1 TOsymboliclengthfieldof the map

fiel!

Co!e sen! control cursor(screen position)for relative positioning


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Program Control Commans

%e can control the e&ecution of program with control comman!s

li'e

(I)*

+C,(

R-,R)

(/0D

R-(-0S-


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!in" Comman

I!"is use! to pass control from one application program to

another which is at o#er ogic$l e%el

,he calling program main program e&pects the control to return

bac'

Data can be passe! to calle! program using C/$$0R-0

If the calle! program is not alrea!y in main storage then it is

loa!e!.


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!IN# S$nta%

EXEC CICS !IN# PROGRAM ( SUBPROGRAM NAME)

COMMAREA(WS-DATAITEM)

LENGTH(LENGTH OF WS-COMMAREA)

END-EXEC.

CONDITIONS : PGMIDERR, NOTAUTH, LENGERR


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&CT! Comman

se! to pass control from one application program to another in

&$me ogic$l e%el

,he program main program from which the control passe! will be

release! this means the control will not returne! bac'.

Data can be passe! to calle! program using C/$$0R-0

If the calle! program is not alrea!y in main storage then it is

loa!e!.


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&CT!S$nta%

-+-C CICS +C,( R/R0$ S4R/R0$ )0$-

C/$$0R-0%S5D0,0I,-$

(-),#(-),# /" %S5C/$$0R-0

-)D5-+-C

C/)DI,I/)S : $ID-RR6 )/,0,#6 (-)-RR


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RET'RN Comman

'ET'! comman! is use! to pass the control from one program

to another at a higher logical level /R CICS

4asically return as two formats

'ET'!: ,as' gets terminate! an! e&its the transaction

'ET'! T'!&I*(T'&!I*) : Release the resource but

leaves trans i! on the terminal for ne&t tas'

Return statements play a ma7or role in +seudo - Con%ers$tion

Data can be passe! using C/$$0R-0 when returning to CICS

ne&t tas'


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RET'RN S$nta%

-+-C CICS R-,R)

,R0)SID,R0)

C/$$0R-0%S5D0,0 0R-0

(-),#(-),# /" %S5D0,0 0R-0

-)D5-+-C.

/R

-+-C CICS R-,R) -)D5-+-C.Con!itions : I)8R-9 6 (-)-RR


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CICS

PROG A

LINK

RETURN

PROG C

LINK

RETURN

PROG B

XCTL

PROG D

XCTL

PROG E

RETURN

A((lication Program !ogical !e)el

!E*E!

!E*E! +

!E*E! ,!E*E!


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C.MMAREA / F1C.MMAREA

COMM'Euse! to pass !ata from one program to another when

use! with lin'+C,( with the IC clause as &,()COM+

%hen C/$$0R-0 is passe! to subprogram then the sub program

receiving fiel!s shoul! be !eclare! un!er *./COMM'E of

lin'age section only

,he length of the C/$$0R-0 an! D"#C/$$0R-0 must be

having s$melength

Data that got upd$tedin sub program will be automatically available in

main program after return comman!. EI0CE!is set when C/$$0R-0 is passe!


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i22erence 3eteen !IN# &CT! CA!!

,he CTcomman! passes control to another program6 but the

resources re;ueste! by the first program may still be allocate!. 0

tas' !oes not en! until a 'ET'!statement is e&ecute!.

%hile in I!"comman!6 program control resumes its instruction

following the (I)*parameter. ,he dis$d%$nt$geof (I)* is thatit re;uires that both the calling program an! the calle! program

remain in main memory even though both are no longer nee!e!.

whenever you !o ch$ngesto the calle! program you nee! to

compile the calling program also.

In case of I!"6 it is not nee!e! .


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!.A / RE!EASE

,he O*comman! retrieves an ob7ect program from !is' an! loa!s it

into main storage it


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Than" 5ou

cics_trianing class_04.ppsx

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