Create Behavior and Service in SAP BTP, ABAP Environment

Right-click on Z_I_ROOM_XXX (data definition) and select New Behavior Definition.

Create your behavior definition:

• Name: Z_I_ROOM_XXX
• Description: Behavior for Z_I_ROOM_XXX
• Root Entity: Z_I_ROOM_XXX

Click Next>.

Click Finish.

Create your behavior definition with following coding:

unmanaged implementation in class Z_I_ROOM_BEHAVE_XXX unique;
define behavior for Z_I_ROOM_XXX
  alias room
  lock master
  etag master lastchangeddatetime
  {
    create;
    update;
    delete;

    field (mandatory) id;
    field (readonly) lastchangedbyuser, lastchangeddatetime;
  }

Save and activate.

In your behavior definition Z_I_ROOM_XXX set the cursor before the implementation class Z_I_ROOM_BEHAVE_XXX and click CTRL + 1. Double-click on Create behavior implementation class Z_I_ROOM_BEHAVE_XXX to create your implementation class.

Create your behavior implementation:

• Name: Z_I_ROOM_BEHAVE_XXX
• Description: Behavior implementation for Z_I_ROOM_XXX
• Behavior Definition: Z_I_ROOM_XXX

Click Next>.

Click Finish.

Create your behavior implementation with following coding:

CLASS lcl_handler DEFINITION INHERITING FROM cl_abap_behavior_handler.
  PUBLIC SECTION.
    CLASS-DATA:
      mt_root_to_create TYPE STANDARD TABLE OF zroom_xxx WITH NON-UNIQUE DEFAULT KEY,
      mt_root_to_update TYPE STANDARD TABLE OF zroom_xxx WITH NON-UNIQUE DEFAULT KEY,
      mt_root_to_delete TYPE STANDARD TABLE OF zroom_xxx WITH NON-UNIQUE DEFAULT KEY.
  PRIVATE SECTION.
    TYPES:
      ty_action(2)     TYPE c,
      tt_message       TYPE TABLE OF symsg,
      tt_room_failed   TYPE TABLE FOR FAILED z_i_room_xxx,
      tt_room_reported TYPE TABLE FOR REPORTED z_i_room_xxx.
    CONSTANTS:
      BEGIN OF cs_action,
        create TYPE ty_action VALUE '01',
        update TYPE ty_action VALUE '02',
        delete TYPE ty_action VALUE '03',
      END OF cs_action.
    METHODS:
      create FOR MODIFY IMPORTING roots_to_create FOR CREATE room,
      update FOR MODIFY IMPORTING roots_to_update FOR UPDATE room,
      delete FOR MODIFY IMPORTING roots_to_delete FOR DELETE room,
      lock FOR BEHAVIOR IMPORTING roots_to_lock FOR LOCK room,
      read FOR BEHAVIOR IMPORTING roots_to_read FOR READ room RESULT et_room,
      validate
        IMPORTING
          iv_action         TYPE ty_action
          is_room           TYPE zroom_xxx
        RETURNING
          VALUE(rv_message) TYPE string.
ENDCLASS.

CLASS lcl_handler IMPLEMENTATION.

  METHOD create.
    LOOP AT roots_to_create INTO DATA(ls_root_to_create).
      DATA(lv_message) = validate( iv_action = cs_action-create is_room = CORRESPONDING zroom_xxx( ls_root_to_create ) ).
      IF lv_message IS INITIAL.
        ls_root_to_create-lastchangedbyuser = sy-uname.
        GET TIME STAMP FIELD ls_root_to_create-lastchangeddatetime.
        INSERT CORRESPONDING #( ls_root_to_create ) INTO TABLE mapped-room.
        INSERT CORRESPONDING #( ls_root_to_create ) INTO TABLE mt_root_to_create.
      ELSE.
        APPEND VALUE #( %cid = ls_root_to_create-%cid id = ls_root_to_create-id %fail = VALUE #( cause = if_abap_behv=>cause-unspecific ) ) TO failed-room.
        APPEND VALUE #( %cid = ls_root_to_create-%cid id = ls_root_to_create-id %msg = new_message_with_text( severity = if_abap_behv_message=>severity-error text = lv_message ) ) TO reported-room.
      ENDIF.
    ENDLOOP.
  ENDMETHOD.

  METHOD update.
    LOOP AT roots_to_update INTO DATA(ls_root_to_update).
      SELECT SINGLE FROM zroom_xxx FIELDS * WHERE id = @ls_root_to_update-id INTO @DATA(ls_room).

      DATA(lt_control_components) = VALUE string_table(
          ( `id` )
          ( `seats` )
          ( `location` )
          ( `hasbeamer` )
          ( `hasvideo` )
          ( `userrating` )
          ( `lastchangedbydatetime` )
          ( `lastchangedbyuser` ) ).

      LOOP AT lt_control_components INTO DATA(lv_component_name).
        ASSIGN COMPONENT lv_component_name OF STRUCTURE ls_root_to_update-%control TO FIELD-SYMBOL(<lv_control_value>).
        CHECK <lv_control_value> = cl_abap_behavior_handler=>flag_changed.
        ASSIGN COMPONENT lv_component_name OF STRUCTURE ls_root_to_update TO FIELD-SYMBOL(<lv_new_value>).
        ASSIGN COMPONENT lv_component_name OF STRUCTURE ls_room TO FIELD-SYMBOL(<lv_old_value>).
        <lv_old_value> = <lv_new_value>.
      ENDLOOP.

      DATA(lv_message) = validate( iv_action = cs_action-update is_room = ls_room ).
      IF lv_message IS INITIAL.
        ls_root_to_update-lastchangedbyuser = sy-uname.
        GET TIME STAMP FIELD ls_root_to_update-lastchangeddatetime.
        INSERT ls_room INTO TABLE mt_root_to_update.
      ELSE.
        APPEND VALUE #( %cid = ls_root_to_update-%cid_ref id = ls_root_to_update-id %fail = VALUE #( cause = if_abap_behv=>cause-unspecific ) ) TO failed-room.
        APPEND VALUE #( %cid = ls_root_to_update-%cid_ref id = ls_root_to_update-id %msg = new_message_with_text( severity = if_abap_behv_message=>severity-error text = lv_message ) ) TO reported-room.
      ENDIF.
    ENDLOOP.
  ENDMETHOD.

  METHOD delete.
    LOOP AT roots_to_delete INTO DATA(ls_root_to_delete).
      SELECT SINGLE FROM zroom_xxx FIELDS * WHERE id = @ls_root_to_delete-id INTO @DATA(ls_room).
      DATA(lv_message) = validate( iv_action = cs_action-delete is_room = ls_room ).
      IF lv_message IS INITIAL.
        INSERT CORRESPONDING #( ls_root_to_delete ) INTO TABLE mt_root_to_delete.
      ELSE.
        APPEND VALUE #( %cid = ls_root_to_delete-%cid_ref id = ls_root_to_delete-id %fail = VALUE #( cause = if_abap_behv=>cause-unspecific ) ) TO failed-room.
        APPEND VALUE #( %cid = ls_root_to_delete-%cid_ref id = ls_root_to_delete-id %msg = new_message_with_text( severity = if_abap_behv_message=>severity-error text = lv_message ) ) TO reported-room.
      ENDIF.
    ENDLOOP.
  ENDMETHOD.

  METHOD lock.
    LOOP AT roots_to_lock INTO DATA(ls_root_to_lock).
      TRY.
          cl_abap_lock_object_factory=>get_instance( iv_name = 'EZROOMXXX')->enqueue(
            it_table_mode = VALUE if_abap_lock_object=>tt_table_mode( ( table_name = 'ZROOM_XXX' ) )
            it_parameter  = VALUE if_abap_lock_object=>tt_parameter( ( name = 'ID' value = REF #( ls_root_to_lock-id ) ) ) ).
        CATCH cx_abap_foreign_lock INTO DATA(lx_lock).
          APPEND VALUE #( id = ls_root_to_lock-id %fail = VALUE #( cause = if_abap_behv=>cause-locked ) ) TO failed-room.
          APPEND VALUE #( id = ls_root_to_lock-id %msg = new_message_with_text( severity = if_abap_behv_message=>severity-error text = lx_lock->get_text( ) ) ) TO reported-room.
        CATCH cx_abap_lock_failure.
          ASSERT 1 = 0.
      ENDTRY.
    ENDLOOP.
  ENDMETHOD.

  METHOD read.
    LOOP AT roots_to_read INTO DATA(ls_root_to_read).
      SELECT SINGLE FROM z_i_room_xxx FIELDS * WHERE id = @ls_root_to_read-id INTO @DATA(ls_room).
      INSERT ls_room INTO TABLE et_room.
    ENDLOOP.
  ENDMETHOD.

  METHOD validate.
     "Add method from Tutorial: Create authorization in SAP BTP, ABAP environment (Step 4)
  ENDMETHOD.

ENDCLASS.


CLASS lcl_saver DEFINITION INHERITING FROM cl_abap_behavior_saver.
  PROTECTED SECTION.
    METHODS finalize          REDEFINITION.
    METHODS check_before_save REDEFINITION.
    METHODS save              REDEFINITION.
ENDCLASS.

CLASS lcl_saver IMPLEMENTATION.
  METHOD finalize.
  ENDMETHOD.

  METHOD check_before_save.
  ENDMETHOD.

  METHOD save.
    INSERT zroom_xxx FROM TABLE @lcl_handler=>mt_root_to_create.
    UPDATE zroom_xxx FROM TABLE @lcl_handler=>mt_root_to_update.
    DELETE zroom_xxx FROM TABLE @lcl_handler=>mt_root_to_delete.
  ENDMETHOD.
ENDCLASS.

Save and activate.

Right-click on data definition Z_I_ROOM_XXX and select New Service Definition.

Create your service definition:

• Name: Z_I_ROOM_SRV_XXX
• Description: Room

Click Next>.

Click Finish.

Edit your service definition:

@EndUserText.label: 'Room'
define service Z_I_ROOM_SRV_XXX {
  expose Z_I_ROOM_XXX as Room;
}

Save and activate.

Right-click on Z_I_ROOM_SRV_XXX and select New Service Binding.

Create your service binding:

• Name: Z_I_ROOM_BND_XXX
• Description: Room
• Binding Type: ODATA V2
• Service Definition: Z_I_ROOM_SRV_XXX

Click Next>.

Click Finish.

Click Activate to activate your service binding.

Click on Service URL to open your service.

Logon with your developer user.

Check your metadata.

Right-click on Room (Entity Set and Association) and select Open Fiori Elements App Preview.

Logon with your developer user.

Check your result.