Exercises - cobolskolan.se · • The COBOL-copy / structure for the map can be found in thecopylib. • To check what the map looks like, enter CECI SEND MAP(EDMAP2) ERASE

CICS Application Programming Exercises

© 2017 MONITOR IT-utbildning, Cobolskolan Sverige, www.cobolskolan.se B1-1

Exercises

http://www.cobolskolan.se/



Contents

Exercise 1 – A simple program ........................................................................... 3 Part 1 – Send ...................................................................................................... 3

Exercise 2 – A conversation ................................................................................. 4 Part 1 – Conversation ......................................................................................... 4

Exercise 3 – Menu program ................................................................................ 5 Part 1 – Send Map .............................................................................................. 5

Exercise 4 – Employees ........................................................................................ 7 Show Employee-info .......................................................................................... 7

Exercise 5 – Tiers.................................................................................................. 9 Presentation and Data Access ............................................................................ 9

Exerise 6 – Changes ............................................................................................ 11 Change Employee-record ................................................................................. 11 More functions ................................................................................................. 11

Övning 7 – Temporary Storage ......................................................................... 12 Uppgift 1 – Kontrollera .................................................................................... 12

Övning 8 – Bläddring ......................................................................................... 13 Uppgift 1 – Bläddring ...................................................................................... 13

Övning 9 – Asynkron bearbetning .................................................................... 15 Uppgift 1 – Starta asynkron bearbetning .......................................................... 15




Exercise 1 – A simple program

In this exercise you will write a simple program, just to familiarize yourself with

CICS-commands.

Part 1 – Send

• The program will have the name EDx1PGM and the transaction code EDx1.

Replace x with the number you have been given by your instructor.

• The program should only write a message to the terminal like the message you see in

the box, and then terminate.

This is Exercise 1

Best Rgds xxxx

• The first message is placed on row 10 and the second message on row 15.

• Compile your program.

• Activate EDF, execute your program and check the result.

• When you find the program working, run again without EDF.

End of exercise.




Exercise 2 – A conversation

In this exercise, you will write a pseudo-conversational program.

Part 1 – Conversation

• In this exercise you will wright a pseuodo-conversational program.


Replace the x with the number you have been given by your instructor.

• When the program starts, it should write information similar to the

information in the box below, and set itself in a pseudo-conversational state.

This is a pseudoconversational program, entered n times

Press Enter to continue, press CLEAR to terminate

• Messages should be placed on rows 15 and 16.

• You should add a counter to the program, that should be increased by one

every time the program is entered.

• If an invalid key is pressed, the Invalid key message should appear on row

18, otherwise not.

This is a pseudoconversational program, entered n times

Press Enter to continue, press CLEAR to terminate

*** Invalid key pressed ***

• When the CLEAR-key is pressed, the program should terminate, but before

this, the screen should be cleared and the keyboard should be unlocked.

• Compile the program.

• Activate CEDF, execute the program and check the result.

• When the result seems OK, run again without CEDF.

End of exercise.




Exercise 3 – Menu program

In this exercise you will write a Menu-program.

Part 1 – Send Map



• The program should send and receive the map with the name EDMAP1

which looks like this:

Time:

CICS Application Programming

MONITOR IT-utbildning

_ Employees

_ Paging

_ Exit

F3 CLEAR=Exit ENTER=Continue

• The COBOL-copy / structure for the map can be found in thecopylib (check with your instructor).

• Take a look at it using Browse, and you will find names given to variables.

• The program should be a pseudo-conversational program and the task is either to send or receive the map.

• Check the users selection by checking the cursor location.

• If the program encounters an error, send a message to the user. There is a location in the map reserved for message.

• When the user chooses Employees control should be given to a program with the name EDx3PGM . If this program is not available, send a message to the terminal.

• When the user chooses Paging control should be given to a program with the name EDx4PGM . If this program is not available, send a message to the terminal.

• When the user chooses to Exit, the program should clear the screen and return normally to CICS.





• Activate CEDF, execute the program end check the result.

End of exercise.




Exercise 4 – Employees

In this exercise you will write a program that read employee-records and

presents them in a map.

Show Employee-info



• The program gets control from the menu-program and should either send or

receive the map EDMAP2 with or without any data.

• The name of the employee-file is EDEMPx. The physical dataset name is not

necessary to know, but can be found by entering CEMT I FILE(EDEMPx).

• The mapset and the map has the name EDMAP2 and looks as follows:

MONITOR IT-utbildning

Employee no :

Social Sec no :

First name :

Last name :

Department :

F3 CLEAR=Exit F1=Clear ENTER=Continue F5=Change F6=Add

F7=Delete F10=Status

• The COBOL-copy / structure for the map can be found in thecopylib.

• To check what the map looks like, enter CECI SEND MAP(EDMAP2) ERASE.

• When the user presses the Enter-key, the program should read the file EDEMPx using the Employee no as the key-value when reading the file.

• This version of the program should implement support for F1=Clear , F3 CLEAR=Exit and Enter=Continue. Other selections should be considered invalid.

• Exceptions should be reported in the map field reserved for message.

• The file EDEMPx has the following structure:




Employee number 5 char

Social sec number 10 char

Given name 20 char

Family name 20 char

Department 5 char

Filler 20 char

Total length 80 char



End of exercise.

EDx4PGM

Receive Map()

Read File()

Send Map()

Return Transid()

EDEMPx

EDMAP2




Exercise 5 – Tiers

In this exercise you will modify the program from the previous exercise and also

write a new program that handles all data access.

Presentation and Data Access • Use program EDx4PGM as a template for the new program that will handle

the presentation. The new program name should be EDx5PGM,called the Presentation-program.

• The program will now only contain logic to present data on the screen.

• All functions for any kind of data access will be handled by a new program named EDxDB1 ,called the DB-program. The first version of the DB- program will use CICS File Control, but later versions can/may use DB2/SQL.

• The DB-program should be called by the Presentation program using LINK, and communication between the two should use COMMAREA.

• It is up to you to design a protocol to be used between the two programs. There must be a way to request service from the DB-program, and also check the outcome of the request as well as receive some data.

• Discuss your solution with the instructor before you start programming.



• Write a new Database-Program named EDxDB2 and use the EDxDB1 as a

template. Replace the CICS Read command with DB2/SQL.



EDx5PGM

01 WS-Commarea.

Link

Send

Return Transid()

EDxDB1

DFHCOMMAREA

Read

Return

EDEMPx

EDMAP2




End of exercise.




Exerise 6 – Changes

In this exercise you will complete the Presentation- and DB-programs to handle

all request-types..

Change Employee-record

• You can use the Presentation-program from Exercise 5 as a template. New name will be EDx6PGM. Update the existing Database-program, but keep a copy using another name.

• Update the programs to handle update requests.( F5=Change)



.

More functions

• Update the programs to handle the rest of the request-types, if you have time available. Check with your instructor.



End of exercise.




Övning 7 – Temporary Storage

I denna övning så skall du komplettera ditt program så att det kan kontrollera att

ingen förändring är gjord av någon annan innan du skriver tillbaka eller raderar

en post.

Uppgift 1 – Kontrollera

• Komplettera programmet UTCxDB1 så att det använder Temporary Storage för lagring av visad post. Könamnet skall vara en sträng som består av terminalens identitet samt namnet på transaktionskoden.

• Innan du ändrar eller raderar poster i UTBPERSx så skall du hämta det sparade innehållet från Temporary Storage och kontrollera så att innehållet i denna post stämmer överens med posten i filen innan du gör ändring.

• Skulle de inte överensstämma så innebär ju det att posten har blivit ändrad av någon annan under tiden som du gjorde dina ändringar på skärmen.

• Avvikelser skall meddelas på skärmen.

• Vid test skall du även testa denna situation. Det kan du göra genom att ha ytterligare ett CICS-fönster öppnat och göra en ändring parallellt.

• Kompilera programmet.

• Aktivera CEDF, exekvera programmet och kontrollera resultatet.

Uppgiften är avslutad.

Övningen är avslutad.

UTCxPGM

01 WS-Commarea.

Link

Send Map()

Return Transid()

UTCxDB1

DFHCOMMAREA

Read

Writeq TS

Return

UTBPERSx

Temporary

Storage UTBMAP2




Övning 8 – Bläddring

I denna övning så skall du skriva ett program som kan visa flera sidor med

information från filen UTBPERS.

Uppgift 1 – Bläddring

• Programmet UTDxPGM, transaktionskod UTDx, skall hämta poster från filen UTBPERSx och visa på skärmen och skall startas när användaren väljer Bläddring fråm mappen UTBMAP1.

• Det finns en map och ett mapset med namnet UTBMAP3.

MONITOR IT-utbildning Sida: xx

Anstnr Persnr Förnamn Efternamn Avdelning

00001 6508130168 Bo Ek IT

F3 CLEAR=Avbryt ENTER=Fortsätt F7=Föregående F8=Nästa

• Kontrollera med CECI hur mappen ser ut fysiskt.

• Applikationsstrukturen för mappen finn på lärare.KURS.COPYLIB. under namnet UTBMAPXX. Den innehåller en tabell med plats för nio(9) rader av information.

• Programmet skall läsa samtliga poster från filen UTBPERSx med File Control Browning och presentera dessa i mappen.

• Det kommer att behövas flera sidor (mappar). När en sida är fylld skall den skrivas till Temporary Storage med könamn UTDxPGM.

• Fortsätt sedan att läsa i filen och fyll på i mappen till du kommer till slutet av

filen. Den sista, ej kompletta sidan, skall även den skrivas till TS.

• Visa sedan första sidan, som du måste hämta igen från TS.

• Avsluta sedan med möjlighet att fortsätta bläddring.

• Kontrollera för giltiga funktionsval, och ignorera felaktiga val.

• Vid F3 CLEAR=Avbryt så skall kontrollen återgå till Meny-programmet

UTBxPGM.





• Exekvera programmet och kontrollera resultatet.


UTCxPGM

01 UTBPERS.

01 UTBMAXX.

Readnext File()

Writeq TS

Readq TS

Send Map()

Return Transid()

UTBPERSx

Temporary

Storage

UTBMAP3




Övning 9 – Asynkron bearbetning

I denna övning så skall du bekanta dig med kommandon som t.ex. Start, Post och

Cancel.

Uppgift 1 – Starta asynkron bearbetning

• Programmet UTCxPGM, som tidigare gjort LINK till programmet UTCxDB1 för att hantera operationer mot filen UTBPERSx, skall nu exekveras asynkront.

• Du skall i stället för Link starta programmet med kommandot Start. Det startade programmet behöver ju samma information som tidigare, och denna information skall överföras med Startkommandot.

• Retur-information till programmet UTCxPGM, kan nu inte heller finnas i Commarea. Denna skall placeras på TS. Bestäm själv könamn redan i programmet UTCxPGM.

• UTCxPGM skall efter det att programmet UTCxDB1 blivit startat med transkoden UTSx vänta under max 20 sekunder eller tills att UTCxDB1 indikerat att det har utfört uppdraget, läsa information från TS, och sedan visa på skärmen som tidigare.

UTCxPGM

01 WS-Commarea.

Start

Delay

Readq TS

Send

Return Transid()

UTCxDB1

WS-Area

Retrieve

Read

Writeq TS

Cancel Reqid()

Return

UTBPERS

Temporary

Storage UTBMAP2





• Aktivera CEDF på skärmen där Presentationsprogrammet skall exekveras.

• Aktivera CEDX för transaktionen UTSx på en annan skärm.

• Exekvera programmen och kontrollera resultatet.


Övningen är avslutad.


Documents

Exercises - cobolskolan.se · • The COBOL-copy / structure for the map can be found in thecopylib. • To check what the map looks like, enter CECI SEND MAP(EDMAP2) ERASE