SAP Business Application Studio: Browser-basierte ABAP-Entwicklung

Schritte zum Erstellen eines ABAP Dev Space:

1. SAP BTP Cockpit öffnen
2. Subaccount auswählen → Services → Instances and Subscriptions
3. SAP Business Application Studio öffnen
4. "Create Dev Space" klicken
5. Namen eingeben: "ABAP_Development"
6. Dev Space Type: "SAP ABAP Development" auswählen
7. "Create Dev Space" bestätigen

1. Dev Space Status: "STOPPED"
2. Play-Button klicken zum Starten
3. Warten bis Status: "RUNNING" (ca. 1-2 Minuten)
4. "Open" klicken um IDE zu öffnen

Verbindung zu BTP ABAP Environment:

1. View → Command Palette (Ctrl+Shift+P)
2. "ABAP: Create Service Instance" eingeben
3. Service Key von BTP ABAP Environment einfügen
4. Verbindungsname vergeben: "BTP_DEV"
5. Verbindung wird getestet und gespeichert

Im BTP Cockpit:

1. Subaccount → Cloud Foundry → Spaces
2. Space öffnen → Service Instances
3. ABAP Environment Instance auswählen
4. "Create" → Service Key
5. Name: "BAS_Connection"
6. Key-Daten kopieren (JSON)

Neues ABAP Cloud Projekt:

1. View → Command Palette (Ctrl+Shift+P)
2. "ABAP: Create Project" eingeben
3. System-Verbindung auswählen
4. Package eingeben: "ZRAP_DEMO"
5. Projektname: "rap-demo"
6. Projekt wird erstellt und geöffnet

rap-demo/
├── .abap/
│   └── service-binding.json
├── src/
│   └── zrap_demo/
│       ├── zcl_example_class.clas.abap
│       └── zif_example_interface.intf.abap
└── package.json

CLASS zcl_bas_demo DEFINITION
  PUBLIC FINAL
  CREATE PUBLIC.

  PUBLIC SECTION.
    INTERFACES if_oo_adt_classrun.

    METHODS calculate_total
      IMPORTING
        it_items TYPE STANDARD TABLE
      RETURNING
        VALUE(rv_total) TYPE p.

ENDCLASS.

CLASS zcl_bas_demo IMPLEMENTATION.

  METHOD if_oo_adt_classrun~main.
    " BAS bietet hier:
    " - Syntax Highlighting
    " - IntelliSense für Methoden
    " - Inline-Dokumentation
    " - Fehlermarkierung in Echtzeit

    out->write( 'Hello from BAS!' ).
  ENDMETHOD.

  METHOD calculate_total.
    " Code Completion zeigt Tabellenoperationen
    LOOP AT it_items ASSIGNING FIELD-SYMBOL(<item>).
      rv_total = rv_total + <item>-amount.
    ENDLOOP.
  ENDMETHOD.

ENDCLASS.

View → Terminal (Ctrl+`)

Source Control View (Ctrl+Shift+G)
- Stage Changes
- Commit
- Push/Pull

View → Problems (Ctrl+Shift+M)

Typischer Workflow:

1. ADT für On-Premise S/4HANA Entwicklung
2. BAS für BTP ABAP Environment
3. Git als gemeinsame Code-Basis
4. Gleicher Code, verschiedene IDEs

" Schritt 1: Database Table
" Erstellt via Command Palette: ABAP: New → Database Table

@EndUserText.label : 'Travel Bookings'
@AbapCatalog.enhancement.category : #NOT_EXTENSIBLE
@AbapCatalog.tableCategory : #TRANSPARENT
@AbapCatalog.deliveryClass : #A
define table ztab_travel {
  key client      : abap.clnt not null;
  key travel_id   : abap.numc(8) not null;
  description     : abap.char(255);
  begin_date      : abap.dats;
  end_date        : abap.dats;
  total_price     : abap.curr(15,2);
  currency_code   : abap.cuky;
  status          : abap.char(1);
  created_by      : abap.uname;
  created_at      : timestampl;
  last_changed_by : abap.uname;
  last_changed_at : timestampl;
}

" Schritt 2: CDS View Entity
" Command Palette: ABAP: New → Data Definition

@AccessControl.authorizationCheck: #NOT_REQUIRED
@EndUserText.label: 'Travel Booking View'
define root view entity ZI_Travel
  as select from ztab_travel
{
  key travel_id      as TravelId,
      description    as Description,
      begin_date     as BeginDate,
      end_date       as EndDate,
      @Semantics.amount.currencyCode: 'CurrencyCode'
      total_price    as TotalPrice,
      currency_code  as CurrencyCode,
      status         as Status,
      @Semantics.user.createdBy: true
      created_by     as CreatedBy,
      @Semantics.systemDateTime.createdAt: true
      created_at     as CreatedAt,
      @Semantics.user.lastChangedBy: true
      last_changed_by as LastChangedBy,
      @Semantics.systemDateTime.lastChangedAt: true
      last_changed_at as LastChangedAt
}

" Schritt 3: Behavior Definition
" Command Palette: ABAP: New → Behavior Definition

managed implementation in class zbp_i_travel unique;
strict ( 2 );
with draft;

define behavior for ZI_Travel alias Travel
persistent table ztab_travel
draft table ztab_d_travel
lock master total etag LastChangedAt
authorization master ( instance )
{
  create;
  update;
  delete;

  field ( numbering : managed, readonly ) TravelId;
  field ( readonly ) CreatedBy, CreatedAt, LastChangedBy, LastChangedAt;

  determination setDefaults on modify { create; }
  validation validateDates on save { field BeginDate, EndDate; }

  draft action Edit;
  draft action Activate;
  draft action Discard;
  draft action Resume;
  draft determine action Prepare;

  mapping for ztab_travel corresponding
  {
    TravelId = travel_id;
    Description = description;
    BeginDate = begin_date;
    EndDate = end_date;
    TotalPrice = total_price;
    CurrencyCode = currency_code;
    Status = status;
    CreatedBy = created_by;
    CreatedAt = created_at;
    LastChangedBy = last_changed_by;
    LastChangedAt = last_changed_at;
  }
}

" Consumption View mit Annotationen
" BAS bietet Auto-Complete für alle Annotationen

@AccessControl.authorizationCheck: #NOT_REQUIRED
@EndUserText.label: 'Travel Consumption View'
@Metadata.allowExtensions: true

define root view entity ZC_Travel
  provider contract transactional_query
  as projection on ZI_Travel
{
      @UI.facet: [
        { id: 'Travel',
          purpose: #STANDARD,
          type: #IDENTIFICATION_REFERENCE,
          label: 'Travel',
          position: 10 }
      ]

      @UI.lineItem: [{ position: 10, importance: #HIGH }]
      @UI.identification: [{ position: 10 }]
  key TravelId,

      @UI.lineItem: [{ position: 20, importance: #HIGH }]
      @UI.identification: [{ position: 20 }]
      Description,

      @UI.lineItem: [{ position: 30 }]
      @UI.identification: [{ position: 30 }]
      BeginDate,

      @UI.lineItem: [{ position: 40 }]
      @UI.identification: [{ position: 40 }]
      EndDate,

      @UI.lineItem: [{ position: 50 }]
      @UI.identification: [{ position: 50 }]
      TotalPrice,

      CurrencyCode,

      @UI.lineItem: [{ position: 60, criticality: 'StatusCriticality' }]
      Status,

      /* Virtual Element für Status-Criticality */
      case Status
        when 'O' then 2  " Open - Yellow
        when 'A' then 3  " Approved - Green
        when 'R' then 1  " Rejected - Red
        else 0
      end as StatusCriticality,

      /* Admin-Felder */
      CreatedBy,
      CreatedAt,
      LastChangedBy,
      LastChangedAt
}

CLASS lhc_travel DEFINITION INHERITING FROM cl_abap_behavior_handler.

  PRIVATE SECTION.
    METHODS setDefaults FOR DETERMINE ON MODIFY
      IMPORTING keys FOR Travel~setDefaults.

    METHODS validateDates FOR VALIDATE ON SAVE
      IMPORTING keys FOR Travel~validateDates.

ENDCLASS.

CLASS lhc_travel IMPLEMENTATION.

  METHOD setDefaults.
    " Lies die Entities für die übergebenen Keys
    READ ENTITIES OF ZI_Travel IN LOCAL MODE
      ENTITY Travel
        FIELDS ( TravelId )
        WITH CORRESPONDING #( keys )
      RESULT DATA(travels).

    " Setze Standardwerte für neue Einträge
    MODIFY ENTITIES OF ZI_Travel IN LOCAL MODE
      ENTITY Travel
        UPDATE
          FIELDS ( Status CurrencyCode )
          WITH VALUE #( FOR travel IN travels
            ( %tky = travel-%tky
              Status = 'O'           " Open
              CurrencyCode = 'EUR' ) )
      REPORTED DATA(reported).

    " In BAS: Breakpoint setzen mit Klick links neben Zeilennummer
    " Debugging starten über Run → Start Debugging
  ENDMETHOD.

  METHOD validateDates.
    " Validierung: BeginDate muss vor EndDate liegen
    READ ENTITIES OF ZI_Travel IN LOCAL MODE
      ENTITY Travel
        FIELDS ( BeginDate EndDate )
        WITH CORRESPONDING #( keys )
      RESULT DATA(travels).

    LOOP AT travels ASSIGNING FIELD-SYMBOL(<travel>).
      IF <travel>-BeginDate > <travel>-EndDate.
        APPEND VALUE #(
          %tky = <travel>-%tky
          %msg = new_message_with_text(
            severity = if_abap_behv_message=>severity-error
            text     = 'Beginndatum muss vor Enddatum liegen'
          )
          %element-BeginDate = if_abap_behv=>mk-on
          %element-EndDate   = if_abap_behv=>mk-on
        ) TO reported-travel.
      ENDIF.
    ENDLOOP.
  ENDMETHOD.

ENDCLASS.

1. Breakpoint setzen: Klick links neben Zeilennummer
2. Debug-Konfiguration: Run → Add Configuration
3. ABAP System auswählen
4. App starten und Aktion ausführen
5. Debugger stoppt am Breakpoint
6. Variables View zeigt Variablenwerte
7. Step Over (F10), Step Into (F11), Continue (F5)

1. Nur benötigte Packages laden
   → Kleinere Projekte = schnellere Performance

2. Dev Space regelmäßig neu starten
   → Bereinigt Speicher und Cache

3. Nicht benötigte Tabs schließen
   → Reduziert Speicherverbrauch

4. Stabile Internetverbindung nutzen
   → BAS ist netzwerkabhängig

Empfohlene Workspace-Struktur:

workspace/
├── project-rap-demo/        # RAP Projekt
├── project-fiori-app/       # Fiori App
├── project-api-integration/ # API Integration
└── .vscode/
    └── settings.json        # Workspace-Einstellungen

Lösung:
1. Browser-Cache leeren
2. Dev Space löschen und neu erstellen
3. BTP Subscription prüfen

Lösung:
1. Service Key neu erstellen
2. Verbindung in BAS neu anlegen
3. Netzwerk/Firewall-Einstellungen prüfen

Lösung:
1. Nicht benötigte Extensions deaktivieren
2. Projekt-Größe reduzieren
3. Browser-Tab isolieren
4. Dev Space neu starten

Lösung:
1. ABAP Language Server Status prüfen (unten rechts)
2. Verbindung zum ABAP-System prüfen
3. Projekt neu laden: Command Palette → Developer: Reload Window