topic Call-back routine not triggered. in Application Development and Automation Discussions

Call-back routine not triggered.

chongwahng — Fri, 24 Feb 2012 09:32:56 GMT

Hi,

I have created the following sample program for testing. And it seems like the call-back routine does not get triggered when I put in function call to execute external OS command. Can anyone confirm if it is indeed not possible to implement call-back with this type of scenario? Anyone has any alternatives?

Basically, the RFC-enabled function will act like a separate timer (a different dialog task run in the background). When time is up, it will execute the call-back routine in ZTEST. This routine can be used for further clean-up action, such as closing connections, releasing logical lock, etc.

report ztest .

p_maxrun type i.

start-of-selection.

call function 'z_timer'

starting new task destination 'NONE'

performing handle_timeout on end of task

exporting i_interval = p_max.

loop at itab.

perform ping_ip_address changing good.

if good <> 'X'.

continue.

endif.

endloop.

form handle_timeout.

message s000(38) 'timeout occured.'.

leave program.

endform.

form ping_ip_address.

call function 'SXPG_CALL_SYSTEM' to run external OS command "PING" on application server.

endform.

**************************************************

Function z_timer

*"----

""Local Interface:

*" IMPORTING

*" VALUE(I_INTERVAL) TYPE AVGTIM

*"----

wait up to i_interval.

Endfunction.

Re: Call-back routine not triggered.

Former Member — Fri, 24 Feb 2012 09:54:20 GMT

Hi,

please check this demo:

Program


REPORT ZSBAB008 NO STANDARD PAGE HEADING.

DATA: XV_SWITCH(1)   TYPE  N  VALUE  1.
DATA: XV_ARCUS(3)    TYPE  N.
DATA: XV_SKIP(02)    TYPE  N.
DATA: XV_POS(02)     TYPE  N.
DATA: XV_BOGEN       TYPE  F.

CONSTANTS: PI        TYPE  F VALUE '3.1415926535897932'.

DATA: BEGIN OF XK_UFO,
        L01(35) VALUE 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA',
        L02(35) VALUE 'BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB',
        L03(35) VALUE 'CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC',
        L04(35) VALUE 'DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD',
        L05(05) VALUE 'VVVVV',
      END   OF XK_UFO.

DATA: BEGIN OF XK_UFO2,
        L01(35) VALUE 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA',
        L02(35) VALUE 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA',
        L03(35) VALUE 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA',
        L04(35) VALUE 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA',
        L05(05) VALUE 'WWWWW',
      END   OF XK_UFO2.

PARAMETERS: XP_WAIT  LIKE  SY-SPONR DEFAULT 1 no-display.

START-OF-SELECTION.

*    Aufruf Warteschleife
     CALL FUNCTION                     'ZT_ENQUE_SLEEP'
        STARTING    NEW TASK           'WAIT'
        PERFORMING  FERTIG             ON END OF TASK
        EXPORTING
                    SECONDS         =  XP_WAIT
        EXCEPTIONS
                    OTHERS          =  1.

*    Bild ausgeben
     PERFORM                           AUSGABE.

************************************************************
AT USER-COMMAND.
************************************************************

*    RESET User Idle Time
     COMMIT  WORK.

*    Aufruf Warteschleife
     CALL FUNCTION                     'ZT_ENQUE_SLEEP'
        STARTING    NEW TASK           'WAIT'
        PERFORMING  FERTIG             ON END OF TASK
        EXPORTING
                    SECONDS         =  XP_WAIT
        EXCEPTIONS
                    OTHERS          =  1.

*    Bild ausgeben
     PERFORM                           AUSGABE.

*&---------------------------------------------------------------------*
*&      Form  FERTIG
*&---------------------------------------------------------------------*
*       Ausgabe veranlassen
*----------------------------------------------------------------------*
*  -->  L_TASK  Taskname
*  <--  keine Ausgabeparameter
*----------------------------------------------------------------------*
FORM FERTIG USING L_TASK.

     RECEIVE RESULTS FROM FUNCTION 'ENQUE_SLEEP'.
     SET USER-COMMAND 'SHOW'.

ENDFORM.                    " FERTIG


FUNCTION ZT_ENQUE_SLEEP.
*"----------------------------------------------------------------------
*"*"Lokale Schnittstelle:
*"       IMPORTING
*"             VALUE(SECONDS) LIKE  SY-SPONR
*"       EXCEPTIONS
*"              SYSTEM_FAILURE
*"----------------------------------------------------------------------
                                                           
   CALL FUNCTION 'ENQUE_SLEEP'
        EXPORTING
             SECONDS        = SECONDS
        EXCEPTIONS
             SYSTEM_FAILURE = 1
             OTHERS         = 2.
                                                                                IF SY-SUBRC <> 0.
      RAISE SYSTEM_FAILURE.
   ENDIF.
                                                            
ENDFUNCTION.

Sorry, original output couldn't be shown in browser as a code ...

Regards,

Klaus

Edited by: Klaus Babl on Feb 24, 2012 11:00 AM

Re: Call-back routine not triggered.

chongwahng — Mon, 27 Feb 2012 07:22:34 GMT

Hi Klaus,

Thank you for your reply. The sample code is pretty similar with what I have done on my own implementation. The only difference is your sample code did not call external OS command.

I have finally decided to give up implementing the call-back routine. As a workaround, I have to execute a function module, BP_JOB_ABORT, to terminate the background job instead.

Regards

Chong Wah

Re: Call-back routine not triggered.

chongwahng — Mon, 27 Feb 2012 07:25:34 GMT

Call-back routine not implemented. But use function module BP_JOB_ABORT in the newly spawn task to terminate the background job instead. Not as ideal as the call-back routine approach, but it works.