code: @Override
  	public boolean isMachineRunning( TargetHandlerParameters parameters, String machineId )
  	throws TargetException {
  
  		boolean result;
  		try {
  			final ServiceInstance vmwareServiceInstance = getServiceInstance( parameters.getTargetProperties());
  			VirtualMachine vm = getVirtualMachine( vmwareServiceInstance, machineId );
  			result = vm != null;
  
  		} catch( Exception e ) {
  			throw new TargetException( e );
  		}
  
  		return result;
  	}
docs: /*
  (non-Javadoc)
  @see net.roboconf.target.api.TargetHandler
  #isMachineRunning(net.roboconf.target.api.TargetHandlerParameters, java.lang.String)