Deleting an Instance

Use the deleteInstance method to delete an instance.

Example 3-6 Deleting Instances

The following example connects the client application to the CIM Object Manager, uses CIMObjectPath to construct an object containing the CIM object path of the object to be deleted, enumerateInstance to get the instance and all instances of its subclasses, and deleteInstance to delete each instance.

 
import java.rmi.*;
import java.util.Enumeration;

import javax.wbem.cim.CIMClass;
import javax.wbem.cim.CIMException;
import javax.wbem.cim.CIMInstance;
import javax.wbem.cim.CIMNameSpace;
import javax.wbem.cim.CIMObjectPath;

import javax.wbem.client.CIMClient;
import javax.wbem.client.PasswordCredential;
import javax.wbem.client.UserPrincipal;

/** 
 * Returns all instances of the specified class.
 * This example takes five arguments: hostname (args[0]), username
 * (args[1]), password (args[2]) namespace (args[3] and classname (args[4]) 
 * It will delete all instances of the specified classname.  The specified 
 * username must have write permissions to the specified namespace  
 */
public class DeleteInstances {
    public static void main(String args[]) throws CIMException {
        CIMClient cc = null;
        // if not five arguments, show usage and exit
        if (args.length != 5) {
           System.out.println("Usage: DeleteInstances host username " +
                              "password namespace classname ");
           System.exit(1);
           }
       try {
          // args[0] contains the hostname and args[3] contains the 
          // namespace.  We create a CIMNameSpace (cns) pointing to 
          // the specified namespace on the specified host
          CIMNameSpace cns = new CIMNameSpace(args[0], args[3]);

         // args[1] and args[2] contain the username and password.
         // We create a UserPrincipal (up) using the username and
         // a PasswordCredential using the password.
         UserPrincipal up = new UserPrincipal(args[1]);
         PasswordCredential pc = new PasswordCredential(args[2]);

        // Connect to the CIM Object Manager and pass it the
        // CIMNameSpace, UserPrincipal and PasswordCredential objects
        // we created. 
        cc = new CIMClient(cns, up, pc);

        // Get the class name (args[4]) and create a CIMObjectPath
        CIMObjectPath cop = new CIMObjectPath(args[4]);

        // Get an enumeration of all the instance object paths of the
        // class and all subclasses of the class.  An instance object 
        // path is a reference used by the CIM object manager to 
        // locate the instance
        Enumeration e = cc.enumerateInstanceNames(cop);


        // Iterate through the instance object paths in the enumeration.
        // Construct an object to store the object path of each 
        // enumerated instance, print the instance and then delete it 
        while (e.hasMoreElements()) {
           CIMObjectPath  op = (CIMObjectPath)e.nextElement();
           System.out.println(op);
           cc.deleteInstance(op);
        } // end while 
  } catch (Exception e) {
       // is we have an exception, catch it and print it out.
       System.out.println("Exception: "+e);
  } // end catch

 // close session.
 if (cc != null) {
     cc.close();
       }
    }
}