通过编程卸载应用程序

您可以通过管理控制台、wsadmin 工具或编程来卸载应用程序。使用此示例,通过编程来卸载应用程序。

开始之前

此任务假设您对 MBean 编程有基本的了解。有关 MBean 编程的信息,请参阅 MBean Java™ 应用程序编程接口 (API) 文档。 在此信息中心中,单击引用 > MBean 接口

您必须首先在 WebSphere® Application Server 上安装了应用程序,才能卸载该应用程序。

关于此任务

执行以下各项任务,从而通过编程卸载应用程序。

过程

  1. 获取与 WebSphere Application Server 的连接。
  2. 获取应用程序管理代理。
  3. 创建用于侦听卸载事件的通知过滤器。
  4. 添加侦听器。
  5. 卸载应用程序。
  6. 如果超时请等待,以使程序不会结束。
  7. 侦听 Java 管理扩展 (JMX) 通知,以了解操作的完成情况。
  8. 当卸载完成时,请移除侦听器,然后退出。

结果

成功运行代码之后,就卸载了应用程序。

示例

以下示例显示如何根据上述步骤卸载应用程序。为了便于打印,某些语句被拆分为几行。

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);
  System.out.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);
  System.out.println ("After uninstall App is called..");

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

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