ABAP program parallel processing

• CASE1. Program start new task, and later acquired processing result
  

  *"----------------------------------------------------------------------
  *"*"本地接口：
  *"  IMPORTING
  *"     VALUE(IS_NAST) TYPE  NAST
  *"  EXPORTING
  *"     VALUE(CV_SUBRC) TYPE  SY-SUBRC
  *"----------------------------------------------------------------------
  DATA:IV_FUNCNAME    TYPE    RS38L_FNAM.
    DATA et_return   TYPE TABLE OF bapiret2.
    DATA et_pro_stru TYPE TABLE OF zif_pro_structure.
    DATA lt_bapiret2 TYPE TABLE OF bapiret2.
  
  
        CALL FUNCTION 'ZIF_FUNC_CALL' STARTING NEW TASK is_nast-objky
          PERFORMING frm_function_recevie_data ON END OF TASK
          EXPORTING
            iv_funcname = lv_funcname
            iv_zproid   = ls_pro-zproid
            is_nast     = is_nast
          TABLES
            rt_bapiret2 = lt_bapiret2[].
  
  FORM frm_function_recevie_data  USING ck .
  
    DATA: lt_bapiret2 TYPE TABLE OF bapiret2 .
  
  
    RECEIVE RESULTS FROM FUNCTION 'ZIF_FUNC_CALL'
      TABLES
        rt_bapiret2       = lt_bapiret2
      EXCEPTIONS
        communication_failure = 1
        system_failure        = 2
        .
  
    gt_bapiret2 = lt_bapiret2 .
    gv_done     = 'X'.
  
  ENDFORM.

   

  Description: Transfer  https://www.cnblogs.com/jiangzhengjun/p/4265586.html
  
  

• 20.1.2 RFC function: remote call

  20.1.2.1. Synchronization

  CALL  FUNCTION task [ DESTINATION ] [? Right? Nei ?? n]

  (In the case of DESTINATION not be omitted, and the dest value is not SPACE, the function must be the RFC function in this manner in order for remote synchronous call)

  20.1.2.2. Asynchronous

  CALL FUNCTION rfm_name STARTING NEW TASK [DESTINATION dest]taskname PERFORMING return_form ON END OF TASK
  
  FORM return_form USING taskname.
    ...
    RECEIVE RESULTS FROM FUNCTION rfm_name
    ...
  ENDFORM.

  Wait for multiple asynchronous call returns a result: WAIT UNTIL  log_exp [ UP the TO  sec  SECONDS ].

  When the asynchronous call can not have IMPORTING parameters ; the function must be the RFC function before using the asynchronous call; as long as there STARTING NEW TASK option is the asynchronous call; if it is asynchronous calls to the same end goal of RFC function, you can omit DESTINATION