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IBC233

IBC233. Calling Programs Updated Winter 2009. Agenda. Calling Programs Lab 11. OPM (static) Call. CALL Parameters: PGM PARM. How it works. When the call statement is executed: Your authority to the program object is checked Do you have access to all the resources required?

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IBC233

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  1. IBC233 Calling Programs Updated Winter 2009

  2. Agenda • Calling Programs • Lab 11

  3. OPM (static) Call • CALL • Parameters: PGM PARM

  4. How it works • When the call statement is executed: Your authority to the program object is checked Do you have access to all the resources required? Gather resources Program opened

  5. Passing Parameters in CL (OPM) Call program1 (‘test’ ‘new’) then program 1must have a pgm statement that looks like this: pgm (&parm1 &parm2) dcl &parm1 *char 10 dcl &parm2 *char 5

  6. Passing Parameters in CL (OPM) pgm dcl &var1 *char 6 value ‘IBC233’ call pgm2 &var1 call pgm(pgm3) parm(&var1) endpgm Pgm2 and pgm3 must have a pgm statement similar to this: pgm parm(&parm1)

  7. Passing Parameters CL to RPG (OPM) pgm call pgm2 (‘RPG’) endpgm RPG program must have the fixed format C spec code: F1 Operation F2 Result *entry plist parm varName

  8. ILE (dynamic) Call • CALLPRC Parameters: PRC PARM RTNVAL

  9. How it works • When the application is created, authority to modules is checked and entire application is bound • When application is called all resources are allocated entire application is opened

  10. Passing Parameters in CL (ILE) Call appl1 (‘test’ ‘new’) then the first *module in the application must must have a pgm statement like this: pgm (&parm1 &parm2) dcl &parm1 *char 10 dcl &parm2 *char 5

  11. Passing Parameters in CL (ILE) pgm dcl &var1 *char 6 value ‘IBC233’ call pgm2 &var1 callprc (mod3) parm(&var1) endpgm mod2 and mod3 must have a pgm statement similar to this: pgm &parm1

  12. Passing Parameters CL to RPG (ILE) pgm callprc pgm2 (‘RPG’) endpgm RPG procedure must have the fixed format C spec code: F1 Operation F2 Result *entry plist parm varName

  13. Advantages of OPM • Don’t have to have all parts of the application done to test. • Parts of the application can be changed without affecting the entire application

  14. Disadvantages of OPM • Integrated Language not supported

  15. Advantages of ILE • Integrated Language Support • Best language for the task • You don’t have to pass all parameters to the program – previous values will be used

  16. Disadvantages of ILE • All modules must be in place to test application • Version Control

  17. What you need to know for Lab 11

  18. Lab 11 – CLLE new commands

  19. OVRDBF • Allows you to use a different file instead of the one that is defined by the RPG program

  20. OVRPRTF • Changes attributes about the spool file.

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