Example code for Trigering a workflow using WAPI from JAVA based tool

Question

Hi Experts,
I am the newest guy in SAP workFlow and BAPI world. I need to trigger a workflow defined in WebFlow engine from a Java client. I know i can use JCo and to use WAPI to get workflow information but i am not sure how it works. Can you give me some example code to trigger one workflow defined in WebFlow using WAPI? If there is any alternative i am interested to know that as well.
Thanks in advance.
Regards,
Riyadh

Answer 1

Use Function Module SWE_EVENT_CReate top trigger event that is linked with a Workflow.
<b>Please reward points if useful</b>
INCLUDE <cntn01> .
  DATA:i_emp_details TYPE STANDARD TABLE OF p0001,  "Employee Details
       wa_request    TYPE p0001,                    "Workarea for Employee details
       v_country_grp TYPE molga,                    "Country SubGrouping
       v_object_key  TYPE sweinstcou-objkey.        "Key for the buisness object ZWOBUSTRIP
  CONSTANTS: c_bo_trip     TYPE swo_objtyp VALUE 'ZWOBUSTRIP',
             c_event_trip  TYPE swo_event  VALUE 'TripCreate',
             c_infy_type_1 TYPE infty      VALUE '0001'.
Event Container declaration
  swc_container i_event_cont.
  swc_create_container i_event_cont.
Reading the INFO TYPE 0001 to obtain the
Employee details
  CALL FUNCTION 'HR_READ_INFOTYPE'
    EXPORTING
      pernr           = i_emp_number
      infty           = c_infy_type_1
      begda           = sy-datum
      endda           = sy-datum
    TABLES
      infty_tab       = i_emp_details
    EXCEPTIONS
      infty_not_found = 1
      OTHERS          = 2.
SY-SUBRC check is not required as the error
handelling will be done by WorkFlow rule
resolution.
  CLEAR wa_request.
  READ TABLE i_emp_details INTO wa_request INDEX 1.
  IF sy-subrc = 0.
  Retrieving the Country SubGrouping for the employee
    SELECT SINGLE molga
      FROM t001p
      INTO v_country_grp
     WHERE werks = wa_request-werks
       AND btrtl = wa_request-persk.
  ENDIF.
Sending the relevant data to event container
  swc_set_element i_event_cont 'EmpId'     i_emp_number.
  IF sy-subrc <> 0.
No Processing needed.
  ENDIF.
  swc_set_element i_event_cont 'PersonnelArea'    wa_request-werks.
  IF sy-subrc <> 0.
No Processing needed.
  ENDIF.
  swc_set_element i_event_cont 'CountryGrouping' v_country_grp.
  IF sy-subrc <> 0.
No Processing needed.
  ENDIF.
  swc_set_element i_event_cont 'EmpSubGrp'       wa_request-persk.
  IF sy-subrc <> 0.
No Processing needed.
  ENDIF.
  swc_set_element i_event_cont 'EmpTripId'       i_emp_trip.
  IF sy-subrc <> 0.
No Processing needed.
  ENDIF.
Raising the event to trigger the workflow
  v_object_key = i_emp_number.
  CALL FUNCTION 'SWE_EVENT_CREATE'
    EXPORTING
      objtype           = c_bo_trip
      objkey            = v_object_key
      event             = c_event_trip
    TABLES
      event_container   = i_event_cont
    EXCEPTIONS
      objtype_not_found = 1
      OTHERS            = 2.
  IF sy-subrc <> 0.
No Processing needed.
  ENDIF.
  COMMIT WORK.
ENDFUNCTION.
Thanks
Arghadip