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102.9. Example 1: Reading Data from SAP


This example demonstrates a route which reads FlightCustomer business object data from SAP. The route invokes the FlightCustomer BAPI method, BAPI_FLCUST_GETLIST, using a destination endpoint to retrieve the data.

Java DSL for route

The Java DSL for the example route is as follows:

XML DSL for route

And the Spring DSL for the same route is as follows:
    <from uri="direct:getFlightCustomerInfo"/>
    <to uri="bean:createFlightCustomerGetListRequest"/>
    <to uri="sap:destination:nplDest:BAPI_FLCUST_GETLIST"/>
    <to uri="bean:returnFlightCustomerInfo"/>

createFlightCustomerGetListRequest bean

The createFlightCustomerGetListRequest bean is responsible for building an SAP request object in its exchange method that is used in the RFC call of the subsequent SAP endpoint . The following code snippet demonstrates the sequence of operations to build the request object:
public void create(Exchange exchange) throws Exception {

    // Get SAP Endpoint to be called from context.
    SAPEndpoint endpoint =

    // Retrieve bean from message containing Flight Customer name to
    // look up. 
    BookFlightRequest bookFlightRequest =

    // Create SAP Request object from target endpoint.
    Structure request = endpoint.getRequest();
    // Add Customer Name to request if set
    if (bookFlightRequest.getCustomerName() != null &&
        bookFlightRequest.getCustomerName().length() > 0) {
    } else {
        throw new Exception("No Customer Name");
    // Put request object into body of exchange message.

returnFlightCustomerInfo bean

The returnFlightCustomerInfo bean is responsible for extracting data from the SAP response object in its exchange method that it receives from the previous SAP endpoint . The following code snippet demonstrates the sequence of operations to extract the data from the response object:
public void createFlightCustomerInfo(Exchange exchange) throws Exception {
    // Retrieve SAP response object from body of exchange message.
    Structure flightCustomerGetListResponse =
    if (flightCustomerGetListResponse == null) {
        throw new Exception("No Flight Customer Get List Response");
    // Check BAPI return parameter for errors 
    Table<Structure> bapiReturn =
        flightCustomerGetListResponse.get("RETURN", Table.class);
    Structure bapiReturnEntry = bapiReturn.get(0);
    if (bapiReturnEntry.get("TYPE", String.class) != "S") {
        String message = bapiReturnEntry.get("MESSAGE", String.class);
        throw new Exception("BAPI call failed: " + message);

    // Get customer list table from response object.
    Table<? extends Structure> customerList =
        flightCustomerGetListResponse.get("CUSTOMER_LIST", Table.class);
    if (customerList == null || customerList.size() == 0) {
        throw new Exception("No Customer Info.");
    // Get Flight Customer data from first row of table.
    Structure customer = customerList.get(0);
    // Create bean to hold Flight Customer data.
    FlightCustomerInfo flightCustomerInfo = new FlightCustomerInfo();
    // Get customer id from Flight Customer data and add to bean.
    String customerId = customer.get("CUSTOMERID", String.class);
    if (customerId != null) {
    // Put bean into body of exchange message.
    exchange.getIn().setHeader("flightCustomerInfo", flightCustomerInfo);