Network Deployment (Distributed operating systems), v8.0 > Administer applications and their environment > Manage applications through programming

Uninstall an application through programming

We can uninstall an application through the administrative console, wsadmin.sh, or programming. Use this example to uninstall an application through programming.

This task assumes a basic familiarity with MBean programming. For information on MBean programming, see MBean Java application programming interface (API) documentation. In this information center, click Reference > Mbean interfaces.

Before you can uninstall an application on WAS, first install it.

To uninstall an application through programming.

Procedure

1. Get a connection to WAS.
2. Get the application management proxy.

3. Create the notification filter for listening to uninstallation events.

4. Add the listener.
5. Uninstall the application.
6. Wait for some timeout so that the program does not end.
7. Listen to Java Management Extensions (JMX) notifications to understand completion of the operation.

8. When the uninstallation completes, remove the listener and quit.

Results

After you successfully run the code, the application is uninstalled.

Example

The following example shows how to uninstall an application based on the previous steps. Some statements are split on multiple lines for printing purposes.

import java.lang.*;
import java.io.*;
import java.util.*;
import java.lang.reflect.*;
import com.ibm.websphere.management.application.*;
import com.ibm.websphere.management.application.client.*;
import com.ibm.websphere.management.*;

import javax.management.*;

public class Uninstall {

    public static void main (String [] args) {

        try {
      
// Get a connection to the server.
  String host = "localhost";
  String port = "8880";
  String target = "WebSphere:cell=cellName,node=nodeName,server=server1";

  Properties config = new Properties();
  config.put (AdminClient.CONNECTOR_HOST,  host);
  config.put (AdminClient.CONNECTOR_PORT,  port);
  config.put (AdminClient.CONNECTOR_TYPE, AdminClient.CONNECTOR_TYPE_SOAP);
  .println ("Config: " + config);
     AdminClient _soapClient = AdminClientFactory.createAdminClient(config);

  // Get the application management proxy.
  AppManagement proxy = AppManagementProxy. getJMXProxyForClient (_soapClient);

  String appName = "MyApp";
  Hashtable options = new Hashtable();
  options.put (AppConstants.APPDEPL_LOCALE, Locale.getDefault());

  //Create the notification filter.
  NotificationFilterSupport myFilter = new NotificationFilterSupport();
  myFilter.enableType (AppConstants.NotificationType);

  //Add the listener.
  NotificationListener listener = new AListener(_soapClient,
myFilter, "Install: " + appName, AppNotification.UNINSTALL);

  // Uninstall the application.
  proxy.uninstallApplication (appName, options, null);
  .println ("After uninstall App is called..");

// Wait for some timeout. The installation API is //  asynchronous and so returns immediately.
// If the program does not wait here, the program ends.
  Thread.sleep(300000); // Wait so that the program does not end.

        }
        catch (Exception e) {
            e.printStackTrace();
        }
    }
}

// Specify the Java Management Extensions (JMX) notification listener for JMX events.
class AListener implements NotificationListener
{
    AdminClient _soapClient;
    NotificationFilterSupport  myFilter;
    Object handback;
    ObjectName on;
    String eventTypeToCheck;

    public AListener(AdminClient cl, NotificationFilterSupport fl,
Object h, String eType) throws Exception
    {
        _soapClient = cl;
        myFilter = fl;
        handback = h;
        eventTypeToCheck = eType;

        Iterator iter = _soapClient.queryNames (new ObjectName(
"WebSphere:type=AppManagement,*"), null).iterator();
        on = (ObjectName)iter.next();
        .println ("ObjectName: " + on);
        _soapClient.addNotificationListener (on, this, myFilter, handback);
    }

    public void handleNotification (Notification notf, Object handback)
    {
            AppNotification ev = (AppNotification) notf.getUserData();
            .println ("!! JMX event Recd: (handback obj= " + handback+ "): " + ev);

            //When the unistallation is done, remove the listener and quit

            if (ev.taskName.equals (eventTypeToCheck) &&
                (ev.taskStatus.equals (AppNotification.STATUS_COMPLETED) ||
                 ev.taskStatus.equals (AppNotification.STATUS_FAILED)))
            {
                    try
                    {
                            _soapClient.removeNotificationListener (on, this);
                    }
            catch (Throwable th)
                    {
                        .println ("Error removing listener: " + th);
                    }
                    System.exit (0);
        }
    }
}

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