This program uses JMX to connect to a running server and invoke the testConnection method on the DataSourceCfgHelper MBean.

/**
 * Description  * Resource adapter test program to make sure that the MBean interfaces work.
 * Following interfaces are tested  * 
 *  ---  testConnection()
 * 
 * 
 * We need following to run  * C:\src>java -Djava.ext.dirs=C:\WebSphere\AppServer\lib;C:\WebSphere\AppServer\java\jre\lib\ext testDSGUI
 * must include jre for log.jar and mail.jar, else get class not found exception  * 
 * 
 */

import java.util.Iterator;
import java.util.Locale;
import java.util.Properties;
import java.util.Set;

import javax.management.InstanceNotFoundException;
import javax.management.MBeanException;
import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;
import javax.management.RuntimeMBeanException;
import javax.management.RuntimeOperationsException;

import com.ibm.websphere.management.AdminClient;
import com.ibm.websphere.management.AdminClientFactory;
import com.ibm.ws.rsadapter.exceptions.DataStoreAdapterException;

public class testDSGUI {

//Use port 8880 for base installation or port 8879 for ND installation String port = "8880";
// String port = "8879";
String host = "localhost";
final static boolean verbose = true;

// eg a configuration ID for DataSource declared at the node level for base private static final String resURI = "cells/cat/nodes/cat:resources.xml#DataSource_1";

// eg a 4.0 DataSource declared at the node level for base //    private static final String resURI = "cells/cat/nodes/cat:resources.xml#WAS40DataSource_1";

// eg Cloudscape DataSource declared at the server level for base //private static final String resURI = "cells/cat/nodes/cat/servers/server1/resources.xml#DataSource_6";

// eg node level DataSource for ND
//private static final String resURI = "cells/catNetwork/nodes/cat:resources.xml#DataSource_1";

// eg server level DataSource for ND
//private static final String resURI = "cells/catNetwork/nodes/cat/servers/server1:resources.xml#DataSource_4";

// eg cell level DataSource for ND
//private static final String resURI = "cells/catNetwork:resources.xml#DataSource_1";

 public static void main(String[] args) {
  testDSGUI cds = new testDSGUI();
  cds.run(args);
 }

/**
 * This method tests the ResourceMbean.
 * 
 * @param args  * @exception Exception  */
 public void run(String[] args) {

  try {

 System.out.println("Connecting to the application server.......");

        /*************************************************************************/
        /**    Initialize the AdminClient                                        */
        /*************************************************************************/ 
 Properties adminProps = new Properties();
 adminProps.setProperty(AdminClient.CONNECTOR_TYPE, AdminClient.CONNECTOR_TYPE_SOAP);
 adminProps.setProperty(AdminClient.CONNECTOR_HOST, host);
 adminProps.setProperty(AdminClient.CONNECTOR_PORT, port);
 AdminClient adminClient = null;
 try {
     adminClient = AdminClientFactory.createAdminClient(adminProps);
 } catch (com.ibm.websphere.management.exception.ConnectorException ce) {
       System.out.println("NLS: Cannot make a connection to the application server\n");
     ce.printStackTrace();
     System.exit(1);
 }

       /*************************************************************************/
       /**    Locate the Mbean                                                  */
       /*************************************************************************/
 ObjectName handle = null;
 try {
                // Send in a locator string 
                // eg for a Baseinstallation this is enough                 ObjectName queryName = new ObjectName("WebSphere:type=DataSourceCfgHelper,*");

                // for ND you need to specify which node/process you would like to test from                 // eg run in the server   //ObjectName queryName = new  OjectName("WebSphere:cell=catNetwork,node=cat,process=server1,type=DataSourceCfgHelper,*");
                // eg run in the node agent
  //ObjectName queryName = new ObjectName("WebSphere:cell=catNetwork,node=cat,process=nodeagent,type=DataSourceCfgHelper,*");
  // eg run in the Deployment Manager   //ObjectName queryName = new ObjectName("WebSphere:cell=catNetwork,node=catManager,process=dmgr,type=DataSourceCfgHelper,*");
  Set s = adminClient.queryNames(queryName, null);
  Iterator iter = s.iterator();
  while (iter.hasNext()) {
                       // use the first MBean that is found     handle = (ObjectName) iter.next();
   System.out.println("Found this ->" + handle);
  }
  if (handle == null) {
   System.out.println("NLS: Did not find this MBean>>" + queryName);
   System.exit(1);
  }
 } catch (MalformedObjectNameException mone) {
  System.out.println("Check the program variable queryName" + mone);
 } catch (com.ibm.websphere.management.exception.ConnectorException ce) {
  System.out.println("Cannot connect to the application server" + ce);
 }

         /*************************************************************************/
         /**           Build parameters to pass to Mbean                          */
         /*************************************************************************/
 String[] signature = { "java.lang.String" };
 Object[] params = { resURI };
 Object result = null;

        if (verbose) {
  System.out.println("\nTesting connection to the database using " + handle);
 }

 try {
               /*************************************************************************/
               /**  Start to test the connection to the database                        */
               /*************************************************************************/
  result = adminClient.invoke(handle, "testConnection", params, signature);
 } catch (MBeanException mbe) {
  // ****** all user exceptions come in here   if (verbose) {
   Exception ex = mbe.getTargetException(); // this is the real exception from the Mbean    System.out.println("\nNLS:Mbean Exception was received contains " + ex);
   ex.printStackTrace();
   System.exit(1);
  }
 } catch (InstanceNotFoundException infe) {
  System.out.println("Cannot find " + infe);
 } catch (RuntimeMBeanException rme) {
  Exception ex = rme.getTargetException();
  ex.printStackTrace(System.out);
  throw ex;
 } catch (Exception ex) {
  System.out.println("\nUnexpected Exception occurred: " + ex);
  ex.printStackTrace();
 }

         /*************************************************************************/
         /**  Process the result.  The result will be the number of warnings      */
         /**  issued.  A result of 0 indicates a successful connection with       */
         /**  no warnings.                                                        */
         /*************************************************************************/

 //A result of 0 indicates a successful connection with no warnings.
 System.out.println("Result= " + result);

  } catch (RuntimeOperationsException roe) {
 Exception ex = roe.getTargetException();
 ex.printStackTrace(System.out);
  } catch (Exception ex) {
 System.out.println("General exception occurred");
 ex.printStackTrace(System.out);
  }
 }
}

Related reference
Data access: