SFSF OData call: Failed to convert response into ODataFeed: An 'EdmSimpleTypeException' occurred

问题

Following the problem from question: Generate VDM for SFSF using Java in SAP Cloud SDK: Generated URI is wrong

I generated a Virtual Data Model from a metadata file from SFSF using the Maven plugin and SAP Cloud SDK for Java.

The generator works correctly, however the URI generated is not what SFSF is expecting:

Generated URI: /odata/v2/SFODataSet
Expected URI: /odata/v2 or /odata/v2/JobRequisition

(SFODataSet entity does not exist, and SFSF gives an error when trying to access it).

Anyway, I proceed and change the DEFAULT_SERVICE_PATH in the generated files to /odata/v2 and create the following servlet that includes the query:

@WebServlet("/req")
public class JobReqServlet extends HttpServlet {

    private static final long serialVersionUID = 1L;
    private static final Logger logger = LoggerFactory.getLogger(JobReqServlet.class);

    private final ErpHttpDestination destination = DestinationAccessor.getDestination("sfsf-sdk-dest").asHttp()
            .decorate(DefaultErpHttpDestination::new);


    @Override
    protected void doGet(final HttpServletRequest request, final HttpServletResponse response)
            throws ServletException, IOException {
        try {
            long id = 2126;
            final JobRequisition jobReqs = new DefaultRCMJobRequisitionService()
                .getJobRequisitionByKey(id)
                .execute(destination);
            response.getWriter().write("Done!");
        } catch (final ODataException e) {
            logger.error(e.getMessage(), e);
            response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
            response.getWriter().write(e.getMessage());
        }
    }
}

This queries a single job requisition (with the id 2126). There's no need to add the option .withServicePath() because it's already changed.

However, when running the app, I get an Internal Server Error after 10-20 second of waiting.

In the logs I can see the following:

The destination is fetched correctly
The HTTP request is correct
SFSF responds with the correct data

But just after the data is received there's an error:

"com.sap.cloud.sdk.odatav2.connectivity.ODataQuery","thread":"http-nio-0.0.0.0-8080-exec-3","level":"ERROR","categories":[],"msg":"Failed to convert response into ODataFeed: An exception of type 'EdmSimpleTypeException' occurred." }

Here are the logs (updated to Drive here), I'm trying to get also the stack trace, I'll update the question as I get it.

Any help would be appreciated.

来源：https://stackoverflow.com/questions/60423361/sfsf-odata-call-failed-to-convert-response-into-odatafeed-an-edmsimpletypeexc

标签

java

sap-cloud-platform

sap-cloud-sdk