topic Re: issues about using T100_MSG in Exception Class in Application Development and Automation Discussions

issues about using T100_MSG in Exception Class

qingda_niu — Fri, 31 May 2013 14:51:23 GMT

I find that if i raise an exception and the importing-parameter 'T100_MSG' is used, the messages which in 'T100_MSG' will not be got by method exceptionClass->get_text( ).

I will get the message ‘Exception CX_SWF_EVT_INVALID_OBJTYPE occurred (program: ZCL_DEMO======================CP, include: ZCL_DEMO======================CM004, line: 25).’

after i run the report.

But what i want to get is 'Invalid Object Type ZCL_WF'.

I debugged the SAP Original Standard Program, i found that in method

CL_MESSAGE->CREATE_FOR_EXCEPTION (Line 43) the exporting parameter subst_table does not contain the T100_MSG informations. And i debugged into method cl_instance_descriptoin->get_attribute_values, at line 16 it only returned the values of those attributes whose type_kind is one of 'NDPTXCFIsbwgy', but the type_kind of T100_MSG is U. So ...

Is it a bug or there something wrong with my own code?!

My Environment is ECC6.0

The following is my code:

REPORT  ZDEMO_12.
 
 data: lo_demo   type ref to zcl_demo,
     lo_cx_wf  type ref to cx_swf_evt_exception,
     lv_text   type string.
 
 start-of-selection.
 
 create object lo_demo.
 
 try.
   call method lo_demo->end_workflow.
 catch cx_swf_evt_exception into lo_cx_wf.
   lv_text = lo_cx_wf->get_text( ).
   write lv_text.
 endtry.

method END_WORKFLOW.
TRY.
 CALL METHOD CL_SWF_EVT_EVENT=>RAISE
   EXPORTING
     IM_OBJCATEG        = 'CL'
     IM_OBJTYPE         = 'ZCL_WF'       " This object type does not exist
     IM_EVENT           = 'JUST_A_EVENT' " This event does not exist
     IM_OBJKEY          = '1110'
 *       IM_EVENT_CONTAINER =
 .
 CATCH cx_swf_evt_invalid_objtype.
 **-- using t100 msg
   ls_t100-msgid = 'SWF_CST'.
   ls_t100-msgno = '006'.
   ls_t100-msgty = 'E'.
   ls_t100-msgv1 = 'Invalid Object Type'.
   ls_t100-msgv2 = 'ZCL_WF'.
 *      ls_t100-msgv3 =
 *      ls_t100-msgv4 =
   raise exception type cx_swf_evt_invalid_objtype
     exporting
       t100_msg = ls_t100.
  ENDTRY.
endmethod.

Best Regards,

qingda.

Re: issues about using T100_MSG in Exception Class

alex_campbell — Fri, 31 May 2013 17:08:13 GMT

I believe you misunderstand the purpose of the GET_TEXT method of an exception class.

The text returned by GET_TEXT is defined statically in the exception class itself, on the 'Texts' tab in SE24. It is not specified at runtime. These are intended to be developer-facing messages that are tecnical in nature (as they are displayed during a short-dump).

The message in attribute T100_MSG is intended to be application-specific. This method can be displayed to the user, or stored in a log, but it's up to each application to do that explicitly. If you want to use this message, you must write logic to raise it yourself.

So instead of calling:

lo_cx_wf->get_text( )

you should be calling:

ls_t100 = lo_cx_wf->t100_msg.
MESSAGE ID ls_t100-msgid TYPE ls_t100-msgty NUMBER ls_t100-msgno
      WITH ls_t100-msgv1 ls_t100-msgv2 ls_t100-msgv3 ls_t100-msgv4
      INTO lv_text.

Re: issues about using T100_MSG in Exception Class

qingda_niu — Sat, 01 Jun 2013 02:49:33 GMT

Thank you very much, Campbell.

yeah, i misunderstood the method 'exceptionClass->get_text', i thought it also can return the message in T100_MSG.

I get the T100_MSG by using the attribute T100_MS of exceptionClass like you said.

Best Regards

qingda