Portal seems to cache RFC results

Question

Hi,
we are calling an RFC in an R/3 4.6C server from an
EP6 SP9 (sneak preview) using JCA. The call is succesful,
but the portal seems to cache the call results; i.e. if
we change the data returned by the RFC the portal receives
the old values. If we restart the portal the returned data
changes, but only on the first call.
I suppose there is some setting for caching RFC results,
but I am not able to find it.
Thanks in advance.
Mattia

Answer 1

Here it is:
BAPI:
FUNCTION zep_test.
*"*"Local interface:
*"  EXPORTING
*"     VALUE(RETURN) LIKE  BAPIRET2 STRUCTURE  BAPIRET2
*"  TABLES
*"      T_AVVISI STRUCTURE  ZLIST_AVVISI
  DATA:
      l_wa_avvisi   LIKE LINE OF t_avvisi
  CLEAR return.
  CLEAR t_avvisi.
  REFRESH t_avvisi.
*  l_wa_avvisi-cdl    = 'E'.
*  l_wa_avvisi-avvisi = 1.
*  APPEND l_wa_avvisi TO t_avvisi.
*  l_wa_avvisi-avvisi = 7.
*  APPEND l_wa_avvisi TO t_avvisi.
*  l_wa_avvisi-avvisi = 8.
*  APPEND l_wa_avvisi TO t_avvisi.
*  l_wa_avvisi-avvisi = 55.
*  APPEND l_wa_avvisi TO t_avvisi.
*  l_wa_avvisi-avvisi = 7.
*  APPEND l_wa_avvisi TO t_avvisi.
*  l_wa_avvisi-avvisi = 1.
*  APPEND l_wa_avvisi TO t_avvisi.
  l_wa_avvisi-cdl    = 'R'.
  l_wa_avvisi-avvisi = 12.
  APPEND l_wa_avvisi TO t_avvisi.
  l_wa_avvisi-avvisi = 30.
  APPEND l_wa_avvisi TO t_avvisi.
  l_wa_avvisi-avvisi = 1.
  APPEND l_wa_avvisi TO t_avvisi.
  l_wa_avvisi-avvisi = 5.
  APPEND l_wa_avvisi TO t_avvisi.
  l_wa_avvisi-avvisi = 10.
  APPEND l_wa_avvisi TO t_avvisi.
  l_wa_avvisi-avvisi = 27.
  APPEND l_wa_avvisi TO t_avvisi.
  l_wa_avvisi-cdl    = 'M'.
  l_wa_avvisi-avvisi = 13.
  APPEND l_wa_avvisi TO t_avvisi.
  l_wa_avvisi-avvisi = 7.
  APPEND l_wa_avvisi TO t_avvisi.
  l_wa_avvisi-avvisi = 8.
  APPEND l_wa_avvisi TO t_avvisi.
  l_wa_avvisi-avvisi = 10.
  APPEND l_wa_avvisi TO t_avvisi.
  l_wa_avvisi-avvisi = 2.
  APPEND l_wa_avvisi TO t_avvisi.
  l_wa_avvisi-avvisi = 34.
  APPEND l_wa_avvisi TO t_avvisi.
  return-type = 'S'.
ENDFUNCTION.
The component is a variation of the jca.SampleComponent.par I found either on SDN or in a note (sorry, I can't seem to find it anymore). I only
changed the doJca method (below).
public void doJca(IPortalComponentRequest request, IPortalRequestEvent event) {
    System.out.println("doJca()");
    Context ctx = null;
//    IConnectionFactory connectionFactory = null;
    IConnection client = null;
    ConnectionProperties prop = null;
    String rfm_name = "ZEP_TEST";
    String system_alias = request.getParameter("system");
    if (system_alias == null) {
               app.putValue(
                    "error",
                    "Couldn't establish a connection with a target system " + system_alias + ".");
               return;   
    System.out.println("system_alias = " + system_alias);
    app.putValue("error", "");
    app.putValue("exportParams", "");
    app.putValue("system_alias", system_alias);
    try {
      // Obtain the initial JNDI context
      //   ctx = new InitialContext();
      // Perform JNDI lookup to obtain connection factory
      //   connectionFactory = (IConnectionFactory) ctx.lookup("EISConnections/SAPFactory");
      //   IConnectionSpec spec = connectionFactory.getConnectionSpec();
      //   ((Map) spec).put("client", "100");
      //      ((Map) spec).put("UserName", "");
      //      ((Map) spec).put("Password", "");
      //      ((Map) spec).put("logonmethod", "UIDPW");
      //      ((Map) spec).put("Language", "EN");
      //      ((Map) spec).put("ashost", "");
      //      ((Map) spec).put("sysnr", "01");
      //      IConnection client = connectionFactory.getConnectionEx(spec);
      IConnectorGatewayService cgService =
        (IConnectorGatewayService) request.getService(IConnectorService.KEY);
      try {
                    prop = new ConnectionProperties(request.getLocale(), request.getUser());
      } catch (Exception e) {
                    app.putValue(
                         "error",
                         "Couldn't establish a connection with the user " + request.getUser() + "." + e);
                    return;     
      try {
                    client = cgService.getConnection(system_alias, prop);
      } catch (Exception e) {
                StringWriter wr = new StringWriter();
                e.printStackTrace(new PrintWriter(wr));
                    app.putValue(
                         "error",
                         "Couldn't establish a connection with a target system " + system_alias + "." + wr.toString());
                    return;
       * Start Interaction
      IInteraction interaction = client.createInteractionEx();
      System.out.println("Starting Interaction...");
      IInteractionSpec interactionSpec = interaction.getInteractionSpec();
      interactionSpec.setPropertyValue("Name", rfm_name);
       * CCI api only has one datatype: Record
      RecordFactory recordFactory = interaction.getRecordFactory();
      MappedRecord importParams = recordFactory.createMappedRecord("CONTAINER_OF_IMPORT_PARAMS");
      IFunctionsMetaData functionsMetaData = client.getFunctionsMetaData();
      IFunction function = functionsMetaData.getFunction(rfm_name);
      if (function == null) {
        app.putValue(
          "error",
          "Couldn't find " + rfm_name + " in a target system " + system_alias + ".");
        return;
       * How to invoke Function modules
      System.out.println("Invoking... " + function.getName());
      MappedRecord exportParams = (MappedRecord) interaction.execute(interactionSpec, importParams);
      app.putValue("exportParams", exportParams);
       * How to get structure values
      IRecord exportStructure = (IRecord) exportParams.get("RETURN");
      String columnOne = exportStructure.getString("TYPE");
      String columnTwo = exportStructure.getString("NUMBER");
      String columnThree = exportStructure.getString("MESSAGE");
      System.out.println("  RETURN-TYPE    = " + columnOne);
      System.out.println("  RETURN-CODE    = " + columnTwo);
      System.out.println("  RETURN-MESSAGE =" + columnThree);
       * How to get table values
      IRecordSet exportTable = (IRecordSet) exportParams.get("T_AVVISI");
      exportTable.beforeFirst(); // Moves the cursor before the first row.
      while (exportTable.next()) {
        String column_1 = exportTable.getString("CDL");
        String column_2 = String.valueOf(exportTable.getInt("AVVISI"));
        System.out.println("  COMPANYCODE_LIST-COMP_CODE = " + column_1);
        System.out.println("  COMPANYCODE_LIST-COMP_NAME = " + column_2);
       * Closing the connection
       interaction.getConnection().close();
      client.close();
    } catch (ConnectorException e) {
      app.putValue("error", e.toString());
      System.out.println("Caught an exception: n" + e);
      throw new RuntimeException(e);
    } catch (Exception e) {
      app.putValue("error", e.toString());
      System.out.println("Caught an exception: n" + e);
      throw new RuntimeException(e);
  When I uncomment the commented section in the BAPI
(or I comment out some more of it), the result displayed
by the iView does not change until I restart the portal.
Thanks in advance!
Mattia