Problem in RFC Lookup

Question

Hi,
I am performing RFC lookup using Communication Channel.
I have used a function called "Z_MATERIAL_DETAILS".
Input to this function is "MATERIALID" and Output of the function is "MATNR".
I am using the following code in my UDF for performing lookup::
//write your code here
final String CHANNEL_NAME = "CC_RFC_LookUp",
               VALNOTFOUND = "VALUE_NOT_FOUND",
               SAPRFCNS = "urn:sap-com:document:sap:rfc:functions",
               TAG_FM = "Z_MATERIAL_DETAILS",
//               TAG_QTB = "QUERY_TABLE",
               TAG_QFL = "UOMCODE"; //UOMCODE
          DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
          DocumentBuilder builder = null;
          factory.setNamespaceAware(false);
          factory.setValidating(false);
          try {
               builder = factory.newDocumentBuilder();
          } catch (Exception e) {
          //     trace.addWarning("Error creating DocumentBuilder - " + e.getMessage());
               result.addValue(e.toString());
          Document docReq = null;
          try {
               // Building up RFC Request Document
               docReq = builder.newDocument();
               Node root = docReq.appendChild(docReq.createElementNS(SAPRFCNS, TAG_FM));
               root.appendChild(docReq.createElement(TAG_QFL)).appendChild(docReq.createTextNode(resultFieldName[0]));
          } catch (Exception e) {
          //     trace.addWarning("Error while building RFC Request  - " + e);
               result.addValue(e.toString());
     //     trace.addInfo("RFC Request XML: " + docReq.toString());
          // Lookup
          Payload result1 = null;
          try {
               Channel channel = LookupService.getChannel("EC1CLNT800", "CC_RFC_LookUp");
               RfcAccessor accessor = LookupService.getRfcAccessor(channel);
               InputStream is = new ByteArrayInputStream(docReq.toString().getBytes());
               XmlPayload payload = LookupService.getXmlPayload(is);
               result1 = accessor.call(payload);
          } catch (LookupException e) {
          //     trace.addWarning("Error during lookup - " + e);
               result.addValue(e.toString());
          // Parsing RFC Response Document
          Document docRsp = null;
          try {
               docRsp = builder.parse(result1.getContent());
          } catch (Exception e) {
          //     trace.addWarning("Error when parsing RFC Response - " + e.getMessage());
               result.addValue(e.toString());
          //trace.addInfo("RFC Response XML: " + docRsp.toString());
          String res = "";
          try {
               res = docRsp.getElementsByTagName("UOMTEXT").item(0).getFirstChild().getNodeValue();
          } catch (Exception e) {
          //     trace.addWarning("Result value not found in DOM - " + e.getMessage());
               result.addValue(e.toString()+VALNOTFOUND);
          result.addValue(res);
Code in Z_MATERIAL_DETAILS ::
""Local Interface:
*"  IMPORTING
*"     VALUE(UOMCODE) LIKE  MARA-MFRPN OPTIONAL
*"  EXPORTING
*"     VALUE(UOMTEXT) LIKE  MARA-MATNR
*"  EXCEPTIONS
*"      val_not_found
<b>select single matnr from mara into uomtext where mfrpn = uomcode.</b>
if sy-subrc <> 0.
raise val_not_found.
endif.
ENDFUNCTION.
<b>When i send three material ids the function module will access the R/3 system thrice which will give rise to PERFORMANCE ISSUE.
So,is there any way to send all the materialids at one time to Function module and similarly receive all the MATNR from Function at once,so that we need to access R/3 system only once.</b>

Answer 1

HI,
Check this link for passing table parameter in JCO call.
http://www.sapdevelopment.co.uk/java/jco/jco_callfunc.htm
Following is the code for retrieving table parameter in JCO call to function BAPI_PO_CREATE.
JCO.Table return_tab = function.getTablesParameterList().getTable("RETURN");
if (return_tab.getNumRows()) > 0 {
// Output the error messages
  return_tab.firstRow();
  do {
    System.out.println(return_tab.getString("MESSAGE");
  while (return_tab.nextRow());
} else {
  String PO_NUM = function.getExportParametersList().getString("PURCHASEORDER");
  System.out.println("Purchase order " + PO_NUM + " created");
Thanks and Regards,
Sandeep Maurya.