Exception thrown while using JCo in Java agents in Lotus Domino applns.

Question

I am trying to use JCo in Java agents in a lotus domino application.  Here is my code:(This Java agent calls a Remote enabled function module in SAP which gives the sum of two given numbers)
import lotus.domino.*;
import java.util.*;
import java.io.*;
import com.sap.mw.jco.*;
public class JavaAgent extends AgentBase
private static JCO.Client jClient;
public JCO.Client getJCOClient(String poolName) throws IOException, JCO.Exception
       System.out.println("Inside getJCOClient method");          
       System.out.println("Pool Name : "+ poolName);  
          boolean poolExists = false;     
      JCO.PoolManager poolManager  = JCO.PoolManager.singleton();
       String poolNames[] = poolManager.getPoolNames();
      // To check whether the given pool name already exists     
     if(poolNames != null)
            for(int poolIter = 0;poolIter<poolNames.length;poolIter++)
             if(poolNames[poolIter].equals(poolName))
                    System.out.println("POOL ID =====>> "+poolName);
                    System.out.println("POOL NAMES["+ poolIter "] ========>>"poolNames[poolIter]);
                    poolExists = true;
                    break;
     String s = String.valueOf( poolExists );
      System.out.println("pool Exists :" + s );     
      if(poolExists == false)
           try
               int maxConnections = 50;
               String JCOClient = "111";
               String user = "apabap4";
               String password = "sap123";
               String language = "en";
               String ashost = "172.25.10.68";
               String sysnr = "00";
               //To create an instance of a client pool to the remote SAP system
               System.out.println("Before addClientPool");
               System.out.println("Pool Name : " + poolName);
               JCO.addClientPool(poolName,maxConnections,JCOClient,user,password,language,ashost,sysnr);
          //     JCO.createClient(JCOClient, user,password,language, "172.25.10.68");
               System.out.println("New Connection Pool Created");
           catch(JCO.Exception jcoe)
                throw new JCO.Exception(jcoe.getGroup(),jcoe.getKey(),"Error in client pool creation "+jcoe.toString());
     try
              //getClient() method returns a client connection from the specified spool     
               jClient = JCO.getClient(poolName);
     catch(JCO.Exception jcoe1)
               throw new JCO.Exception(jcoe1.getGroup(),jcoe1.getKey(),"Error in getting JCO client "+jcoe1.toString());
          return jClient;
     // End of method getJCOClient()     
     public void releaseJCOClient() throws JCO.Exception
      try
               JCO.releaseClient(jClient);
     catch(JCO.Exception jcoe2)
               throw new JCO.Exception(jcoe2.getGroup(),jcoe2.getKey(),"Error in releasing client "+jcoe2.toString());
public void NotesMain()
          try {
               Session session = getSession();
               AgentContext agentContext = session.getAgentContext();
              Document doc = agentContext.getDocumentContext();
   JavaAgent jcoObj = new JavaAgent();
   JCO.Client jClient = null;
   String poolId = new String("EG_POOL");
   IFunctionTemplate   ifun;//For function object
   JCO.Function func;          
   JCO.ParameterList importParams,exportParams,tableParams;
   try{
         jClient = jcoObj.getJCOClient(poolId);
       System.out.println("After Getting Connection");
       System.out.println("Attributes:" + jClient.getAttributes());
        //Create a repository object
        JCO.Repository mRepository = new JCO.Repository("myJCO_REPOSITORY", jClient);
        //Creating a function object
        ifun = mRepository.getFunctionTemplate("ZSUM");// The Function Name
       func = ifun.getFunction();
        System.out.println("Function name " + func.getName());
        //To get the import parameters in the function module
        importParams = func.getImportParameterList();
        System.out.println("Import parameters"+ importParams);
        importParams.appendValue("OPERAND1",importParams.TYPE_INT,4,"25");
       importParams.appendValue("OPERAND2",importParams.TYPE_INT,4,"25");
        jClient.execute(func);//Executing the function 
        //To get the export parameters in the function module
        exportParams = func.getExportParameterList();
           System.out.println("Export parameters" + exportParams);
        int sumVl = exportParams.getInt("SUM");
        Integer sumValue = new Integer(sumVl);
        System.out.println("Sum Value" + sumValue);
         doc.replaceItemValue("txtSum", sumValue.toString());
        //releaseJCOClient();
  catch(IOException ioe)
      ioe.printStackTrace();
  catch(JCO.Exception jcoe1)
      jcoe1.printStackTrace();
          } catch(Exception e) {
               e.printStackTrace();
While executing this agent I am getting the following exception.
08/25/2004 06:27:45 PM  HTTP JVM: java.lang.ExceptionInInitializerError: JCO.classInitialize(): Could not load middleware layer 'com.sap.mw.jco.rfc.MiddlewareRFC'  Native Library C:\Lotus\Domino\sapjcorfc.dll already loaded in another classloader
08/25/2004 06:27:45 PM  HTTP JVM:  at com.sap.mw.jco.JCO.<clinit>(Unknown Source)
08/25/2004 06:27:45 PM  HTTP JVM:  at JCoCallTrans.getJCOClient(JCoCallTrans.java:42)
08/25/2004 06:27:45 PM  HTTP JVM:  at JCoCallTrans.NotesMain(JCoCallTrans.java:88)
08/25/2004 06:27:45 PM  HTTP JVM:  at lotus.domino.AgentBase.runNotes(Unknown Source)
08/25/2004 06:27:45 PM  HTTP JVM:  at lotus.domino.NotesThread.run(NotesThread.java:208)
08/25/2004 06:27:45 PM  HTTP JVM: Error cleaning up agent threads
Also I have placed the jco.jar in lib of jvm in Domino directory i.e.,
Lotus\Domino\jvm\lib and
sapjcorfc.dll and librfc32.dll in system32 of WINNT folder.
Kindly help me to rectify this problem
Arokiaraj.S

Answer 1

I had approximate the same problem, and I've fixed it. In my jar file the javaHelpSearch Folder was named with a leading lower case "j". But in my helpset.hs it was with an upper Case "J"
<name>Search</name>
    <label>Search</label>
    <type>javax.help.SearchView</type>
    <data engine="com.sun.java.help.search.DefaultSearchEngine">JavaHelpSearch</data>
   </view>When the helpset is called from a folder: windows ignore it, but when the helpset is called from into a jar you must type it correct!