Home  Sample Code ABAP OO ABAP OO: Demo for events in Counter class
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ABAP OO: Demo for events in Counter class |
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Written by Anon.
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Monday, 28 May 2007 |
REPORT demo_class_counter_event.
CLASS counter DEFINITION.
PUBLIC SECTION.
METHODS increment_counter.
EVENTS critical_value EXPORTING value(excess) TYPE i.
PRIVATE SECTION.
DATA: count TYPE i,
threshold TYPE i VALUE 10.
ENDCLASS.
CLASS counter IMPLEMENTATION.
METHOD increment_counter.
DATA diff TYPE i.
ADD 1 TO count.
IF count > threshold.
diff = count - threshold.
RAISE EVENT critical_value EXPORTING excess = diff.
ENDIF.
ENDMETHOD.
ENDCLASS.
CLASS handler DEFINITION.
PUBLIC SECTION.
METHODS handle_excess FOR EVENT critical_value OF counter
IMPORTING excess.
ENDCLASS.
CLASS handler IMPLEMENTATION.
METHOD handle_excess.
WRITE: / 'Excess is', excess.
ENDMETHOD.
ENDCLASS.
DATA: r1 TYPE REF TO counter,
h1 TYPE REF TO handler.
START-OF-SELECTION.
CREATE OBJECT: r1, h1.
SET HANDLER h1->handle_excess FOR ALL INSTANCES.
DO 20 TIMES.
CALL METHOD r1->increment_counter.
ENDDO.
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