1 :  public interface BillingService { 
    2 :   
    3 :      public void serviceCompleted(String customer); 
    4 :  } 
    5 :   
    6 :  ... 
    7 :   
    8 :  public class MyBillingService implements BillingService { 
    9 :  public void serviceCompleted(String customer) { 
   10 :          calculateInvoice(customer); 
   11 :  } 
   12 :   
   13 :  public String billingHoroscope(String sign) { 
   14 :      ... 
   15 :  } 
   16 :  } 
   17 :   
   18 :  public void invoke(SOAPContext reqContext, 
   19 :                         SOAPContext resContext) throws SOAPException { 
   20 :   
   21 :          try { 
   22 :              Response resp = RPCRouter.invoke( dd, call, targetObject, 
   23 :                                               reqContext, resContext ); 
   24 :              if (targetObject instanceOf BillingService) {                              ((BillingService)targetObject).serviceCompleted(username); 
   25 :              } 
   26 :              Envelope env = resp.buildEnvelope(); 
   27 :              StringWriter  sw = new StringWriter(); 
   28 :              env.marshall( sw, call.getSOAPMappingRegistry(), resContext ); 
   29 :              resContext.setRootPart( sw.toString(),                             Constants.HEADERVAL_CONTENT_TYPE_UTF8); 
   30 :          } 
   31 :          catch( Exception e ) { 
   32 :              if ( e instanceof SOAPException ) throw (SOAPException ) e ; 
   33 :              throw new SOAPException(Constants.FAULT_CODE_SERVER, 
   34 :                                      e.toString() ); 
   35 :          } 
   36 :      } 
   37 :  }