Updating an application through programming

You can update an existing application through the administrative console, the wsadmin tool, or programming. Use this example to completely update an application through programming.

Before you begin

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

Before you can update an application on WebSphere® Application Server, you must install your application.

About this task

Perform the following tasks to completely update an application through programming.

Procedure

Connect to WebSphere Application Server.
Create the application management proxy.
Create the notification filter for listening to events.
Add the listener.
Prepare the enterprise archive (EAR) file by populating it with binding information.
Update the application.
Wait for some timeout so that the program does not end.
Listen to Java Management Extensions (JMX) notifications to understand completion of the operation.
After you update the application, remove the listener and quit.

Results

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

Example

The following example shows how to update 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 aa {

    public static void main (String [] args) {

        try {
             
  // Connect to WebSphere Application 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);
  System.out.println ("Config: " + config);
     AdminClient _soapClient = AdminClientFactory.createAdminClient(config);
  
  // Create the application management proxy, AppManagement.
  AppManagement proxy = AppManagementProxy.getJMXProxyForClient (_soapClient);

  String appName = "MyApp";

String fileContents = "C:\test\test.ear";

String fileContents = "/test/test.ear";


  // Create the notification filter.
  NotificationFilterSupport myFilter = new NotificationFilterSupport();
  myFilter.enableType (NotificationConstants.TYPE_APPMANAGEMENT);
  //Add the listener.
  NotificationListener listener = new AListener(_soapClient, myFilter, 
"Install: " + appName, AppNotification.INSTALL);

// Refer to the installation example to see how you can prepare the enterprise archive (EAR)
// file by populating it with binding information.
// If code for the preparation phase has started, then you already have the options table.
// If not, create a new table and add the module-to-server relationship to it by uncommenting
// the next statement.
//Hashtable options = new Hashtable();
  options.put (AppConstants.APPDEPL_LOCALE, Locale.getDefault());
  options.put ((AppConstants.APPUPDATE_CONTENTTYPE, AppConstants.APPUPDATE_CONTENT_APP); 

// Uncomment the following statements to add the module to the server relationship table if 
//  the preparation phase does not collect it
//Hashtable module2server = new Hashtable();
//module2server.put ("*", target);
//options.put (AppConstants.APPDEPL_MODULE_TO_SERVER, module2server);
// Update the application.
  proxy.updateApplication (appName,
                 null,
                 fileContents,
                 AppConstants.APPUPDATE_UPDATE,
                 options,
                 null);

// Wait for some timeout. The installation application programming interface (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();
        System.out.println ("ObjectName: " + on);
        _soapClient.addNotificationListener (on, this, myFilter, handback);
    }

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

            //When the installation 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)
                    {
                        System.out.println ("Error removing listener: " + th);
                    }
                    System.exit (0);
        }
    }
}