JCO Server implementation questions

Question

Hi experts,
I want to try to create a JCO Server with the JCO 3 library.
I'm kinda lost in all the links I've found since there is still a lot of things from the JCO 2 on the internet and I don't understand everything I'm doing.
Please note that there is already a working Java JCO server with old IBM tools and we need to migrate to JCO 3.
So here are my questions :
What do I have to do exactly in the sm59 transaction ?
Here is what I get in the RSGWLST transaction http://i.imgur.com/IRgAyO8.png http://i.imgur.com/YyfDQbt.png (Loic-PC is my machine so I guess my java jco server is up.) Is everything ok ?
I have followed this link (Java Program for Creating a Server Connection - Components of SAP Communication Technology - SAP Library) to create my java jco server. What exactly are ServerDataProvider.JCO_GWHOST, ServerDataProvider.JCO_GWSERV and above all ServerDataProvider.JCO_PROGID)
How do I testmy Java JCO server ? I understood that I have to call STFC_TRANSACTION in se37 where I put my jco destination (previously set up in sm59 ?) and a string but I have a dump when I'm tying that.
I hope someone can help me, everything is still really blurry to me.
Regards
Here is the code I use to try to connect :
    static String SERVER_NAME1 = "JCO_SERVER";
    static String DESTINATION_NAME1 = "ABAP_AS_WITHOUT_POOL";
    static String DESTINATION_NAME2 = "ABAP_AS_WITH_POOL";
    static
        Properties connectProperties = new Properties();
        connectProperties.setProperty(DestinationDataProvider.JCO_ASHOST, "172.16.200.114");
        connectProperties.setProperty(DestinationDataProvider.JCO_SYSNR,  "00");
        connectProperties.setProperty(DestinationDataProvider.JCO_CLIENT, "500");
        connectProperties.setProperty(DestinationDataProvider.JCO_USER,   "develop2");
        connectProperties.setProperty(DestinationDataProvider.JCO_PASSWD, "passw0rd");
        connectProperties.setProperty(DestinationDataProvider.JCO_LANG,   "en");
        createDataFile(DESTINATION_NAME1, "jcoDestination", connectProperties);
        connectProperties.setProperty(DestinationDataProvider.JCO_POOL_CAPACITY, "3");
        connectProperties.setProperty(DestinationDataProvider.JCO_PEAK_LIMIT,    "10");
        createDataFile(DESTINATION_NAME2, "jcoDestination", connectProperties);
        Properties servertProperties = new Properties();
        servertProperties.setProperty(ServerDataProvider.JCO_GWHOST, "sapdevdb02");
        servertProperties.setProperty(ServerDataProvider.JCO_GWSERV, "sapgw00");
        servertProperties.setProperty(ServerDataProvider.JCO_PROGID, "JCOServer");
        servertProperties.setProperty(ServerDataProvider.JCO_REP_DEST, "ABAP_AS_WITH_POOL");
        servertProperties.setProperty(ServerDataProvider.JCO_CONNECTION_COUNT, "2");
        createDataFile(SERVER_NAME1, "jcoServer", servertProperties);

Answer 1

Hi Loic.
The properties GWHost is Gateway Host and GWSERV stands for Gateway Server.
Please look at this link to get more details:
Possible Parameters (SAP Library - Components of SAP Communication Technology)
Could you please put your full code for this class?
I'm saying this because the code you have wrote only creates the propreties file that JCO uses to configure the server but you have to run your server through the main statement.
You have to do something like that on your StfcConnectionHandler class.
public static void main(String[] args) {
       step1SimpleServer();
See my example:
StfcConnectionHandler class--------------------
package main;
import com.sap.conn.jco.JCoException;
import com.sap.conn.jco.JCoFunction;
import com.sap.conn.jco.server.DefaultServerHandlerFactory;
import com.sap.conn.jco.server.JCoServer;
import com.sap.conn.jco.server.JCoServerContext;
import com.sap.conn.jco.server.JCoServerFactory;
import com.sap.conn.jco.server.JCoServerFunctionHandler;
public class StfcConnectionHandler implements JCoServerFunctionHandler {
  private static final String SERVER_NAME1 = "YOUR_SERVER_NAME";
  public void handleRequest(JCoServerContext serverCtx, JCoFunction function) {
  System.out
  .println("----------------------------------------------------------------");
  System.out.println("call              : " + function.getName());
  System.out
  .println("ConnectionId      : " + serverCtx.getConnectionID());
  System.out.println("SessionId         : " + serverCtx.getSessionID());
  System.out.println("TID               : " + serverCtx.getTID());
  System.out.println("repository name   : "
  + serverCtx.getRepository().getName());
  System.out
  .println("is in transaction : " + serverCtx.isInTransaction());
  System.out.println("is stateful       : "
  + serverCtx.isStatefulSession());
  System.out
  .println("----------------------------------------------------------------");
  System.out.println("gwhost: " + serverCtx.getServer().getGatewayHost());
  System.out.println("gwserv: "
  + serverCtx.getServer().getGatewayService());
  System.out.println("progid: " + serverCtx.getServer().getProgramID());
  System.out
  .println("----------------------------------------------------------------");
  System.out.println("attributes  : ");
  System.out.println(serverCtx.getConnectionAttributes().toString());
  System.out
  .println("----------------------------------------------------------------");
  System.out.println("req text: "
  + function.getImportParameterList().getString("REQUTEXT"));
  function.getExportParameterList().setValue("ECHOTEXT",
  function.getImportParameterList().getString("REQUTEXT"));
  function.getExportParameterList().setValue("RESPTEXT", "Hello World");
  static void step1SimpleServer() {
  JCoServer server;
  try {
  server = JCoServerFactory.getServer(SERVER_NAME1);
  } catch (JCoException ex) {
  throw new RuntimeException("Unable to create the server "
  + SERVER_NAME1 + ", because of " + ex.getMessage(), ex);
  JCoServerFunctionHandler stfcConnectionHandler = new StfcConnectionHandler();
  DefaultServerHandlerFactory.FunctionHandlerFactory factory = new DefaultServerHandlerFactory.FunctionHandlerFactory();
  factory.registerHandler("STFC_CONNECTION", stfcConnectionHandler);
  server.setCallHandlerFactory(factory);
  server.start();
  System.out.println("The program can be stopped using <ctrl>+<c>");
  public static void main(String[] args) {
  step1SimpleServer();
StepByStepServer class
package main;
import java.io.File;
import java.io.FileOutputStream;
import java.util.Properties;
import com.sap.conn.jco.ext.DestinationDataProvider;
import com.sap.conn.jco.ext.ServerDataProvider;
public class StepByStepServer
    static String SERVER_NAME1 = "SERVER";
    static String DESTINATION_NAME1 = "ABAP_AS_WITHOUT_POOL";
    static String DESTINATION_NAME2 = "ABAP_AS_WITH_POOL";
    static
        Properties connectProperties = new Properties();
        connectProperties.setProperty(DestinationDataProvider.JCO_ASHOST, "ls4065");
        connectProperties.setProperty(DestinationDataProvider.JCO_SYSNR,  "85");
        connectProperties.setProperty(DestinationDataProvider.JCO_CLIENT, "800");
        connectProperties.setProperty(DestinationDataProvider.JCO_USER,   "farber");
        connectProperties.setProperty(DestinationDataProvider.JCO_PASSWD, "laska");
        connectProperties.setProperty(DestinationDataProvider.JCO_LANG,   "en");
        createDataFile(DESTINATION_NAME1, "jcoDestination", connectProperties);
        connectProperties.setProperty(DestinationDataProvider.JCO_POOL_CAPACITY, "3");
        connectProperties.setProperty(DestinationDataProvider.JCO_PEAK_LIMIT,    "10");
        createDataFile(DESTINATION_NAME2, "jcoDestination", connectProperties);
        Properties servertProperties = new Properties();
        servertProperties.setProperty(ServerDataProvider.JCO_GWHOST, "binmain");
        servertProperties.setProperty(ServerDataProvider.JCO_GWSERV, "sapgw53");
        servertProperties.setProperty(ServerDataProvider.JCO_PROGID, "JCO_SERVER");
        servertProperties.setProperty(ServerDataProvider.JCO_REP_DEST, "ABAP_AS_WITH_POOL");
        servertProperties.setProperty(ServerDataProvider.JCO_CONNECTION_COUNT, "2");
        createDataFile(SERVER_NAME1, "jcoServer", servertProperties);
    static void createDataFile(String name, String suffix, Properties properties)
        File cfg = new File(name+"."+suffix);
        if(!cfg.exists())
            try
                FileOutputStream fos = new FileOutputStream(cfg, false);
                properties.store(fos, "for tests only !");
                fos.close();
            catch (Exception e)
                throw new RuntimeException("Unable to create the destination file " + cfg.getName(), e);
Regards