code: protected void invokeHandler(Event event, ApiContext apiContext) 
              throws ClassNotFoundException, NoSuchMethodException, SecurityException, IllegalAccessException,
                     IllegalArgumentException, InvocationTargetException, InstantiationException 
          {
          String topic[] = event.getTopic().split("\\.");
          String eventCategory = topic[0].substring(0, 1).toUpperCase() + topic[0].substring(1);
          String eventAction = topic[1];
          
          // get list of registered handlers
          Object handler = EventManager.getInstance().getRegisteredClassHandlers(eventCategory);
          if (handler !=null) {
              String methodName = eventAction;
              String className = handler.getClass().getName();
              try {
                  Method m;
                  m = handler.getClass().getMethod(methodName, ApiContext.class, Event.class);
                  m.invoke(handler, apiContext, event);
              } catch (NoSuchMethodException e) {
                  logger.warn("No " + eventAction + " method on class " + className);
                  throw e;
              } catch (SecurityException e) {
                  logger.warn("Security exception: " + e.getMessage());
                  throw e;
              } catch (IllegalAccessException e) {
                  logger.warn("Illegal access for method " + eventAction + " on class " + className);
                  throw e;
              } catch (IllegalArgumentException e) {
                  logger.warn("Illegal argument exception for method " + eventAction + " on class " + className);
                  throw e;
              } catch (InvocationTargetException e) {
                  logger.warn("Invocation target exception for method " + eventAction + " on class " + className);
                  throw e;
              }
          }
      }
docs: Dispatch the event to the handler registered for the category. The method
  corresponding to the event type is invoked.
  
  @param event The event object
  @param apiContext The application context
  @throws ClassNotFoundException
  @throws SecurityException
  @throws NoSuchMethodException
  @throws InstantiationException
  @throws InvocationTargetException
  @throws IllegalArgumentException
  @throws IllegalAccessException