Adding to, updating, or deleting part of an application through programming

We can add to, update, or delete part of an existing application through the administrative console, the wsadmin tool, or programming. This example changes part of an application through programming. Use this example whether you add to, update, or delete part of an existing application. Multiple changes to an application can be packaged in a single .zip file.

 

Before you begin

To learn about the structure of the .zip file, see updating applications through the administrative console. This task assumes a basic familiarity with MBean programming. For information on MBean programming see MBean Java application programming interface (API) documentation.

Before one can add to, update, or delete part of an application on WebSphere Application Server, first install your application.

 

Overview

Perform the following tasks to add to, update, or delete part of an application through programming.

 

Procedure

1. Connect to WebSphere Application Server.

2. Create the application management proxy.

3. Create the notification filter.

4. Add the listener.

5. Partially change the existing 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 update is done, remove the listener and quit.

 

Result

After you successfully run the code, you have changed the application.

 

Example

The following example shows how to add to, update, or delete part of an application based on the previous steps. Some statements are split on multiple lines for printing purposes.

//Inputs: 
//partialApp specifies the location of the partial application.
//appName specifies the name of the application.

String partialApp = "C:/apps/partial.zip";
String appName = "MyApp";

//Do a get of the administrative client to connect to
//WebSphere Application Server.

AdminClient client = ...;

//Create the application management proxy.
AppManagement proxy = AppManagementProxy. getJMXProxyForClient (client);

// 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.UPDATE); 
//Partially change the existing application, MyApp.

Hashtable options = new Hashtable();
options.put (AppConstants.APPDEPL_LOCALE, Locale.getDefault());
options.put (AppConstants.APPUPDATE_CONTENTTYPE, AppConstants.APPUPDATE_CONTENT_PARTIALAPP);

proxy.updateApplication (  appName, 
        null, 
        partialApp,
        null,
        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);
        }
    }
}

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Related Tasks

Installing an application through programming
Uninstalling an application through programming
Updating an application through programming
Preparing a module and adding it to an existing application through programming
Preparing and updating a module through programming
Delete a module through programming
Adding a file through programming
Updating a file through programming
Delete a file through programming

 

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