Example: Testing a connection using testConnection(ConfigID)

 

The following sample code creates a data source instance and an associated connection instance, and tests them to ensure database connectivity.

This program uses JMX to connect to a running server and invoke the testConnection method on the DataSourceCfgHelper MBean. The acronym ND in a comment line indicates that the following code applies to WebSphere Application Server ND. The word Base in a comment line indicates that the following code applies to WAS.

/**
 * 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 a 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 appserver.......");

        /*************************************************************************/
        /**    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 appserver\n");
      ce.printStackTrace();
      System.exit(1);
  }

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

                // for ND  specify which node/process you would like to test from
                // eg run in the server
//ND: ObjectName queryName = new OjectName
        ("WebSphere:cell=catNetwork,node=cat,process=server1,type=DataSourceCfgHelper,*");
                // eg run in the node agent
//ND: ObjectName queryName = new ObjectName         ("WebSphere:cell=catNetwork,node=cat,process=nodeagent,type=DataSourceCfgHelper,*");
//ND: eg run in the Deployment Manager //ND: 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 appserver" + 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);
  }
 }
}

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Related Reference

Data access: Resources for learning

 

Reference topic