Background job – ensure sequential processing

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Sometimes it’s important to ensure, that particular background job is processed only once and to avoid parallel, concurent starts. There are many ways to implement the appropriate check, for example using locks or evaluating the list of running jobs.

For the second idea, see a simple coding below.

REPORT zbtc_single.

DATA:
  ls_jobsel     TYPE btcselect,
  lt_joblist    TYPE TABLE OF tbtcjob,
  ls_joblist    TYPE tbtcjob,
  lv_nr_of_jobs TYPE i.

ls_jobsel-jobname = sy-cprog.
ls_jobsel-ready   = 'X'.
ls_jobsel-running = 'X'.

CALL FUNCTION 'BP_JOB_SELECT'
  EXPORTING
    jobselect_dialog    = 'N'
    jobsel_param_in     = ls_jobsel
  IMPORTING
    nr_of_jobs_found    = lv_nr_of_jobs
  TABLES
    jobselect_joblist   = lt_joblist
  EXCEPTIONS
    invalid_dialog_type = 1
    jobname_missing     = 2
    no_jobs_found       = 3
    selection_canceled  = 4
    username_missing    = 5
    OTHERS              = 6.

CHECK lv_nr_of_jobs = 1.

* ... further processing

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