code: public void addRequestHandler(String clazz) {
  
          Object initClass;
          try {
              initClass = Class.forName(clazz).newInstance();
          } catch (Throwable t) {
              LOG.error(Messages.get().getBundle().key(Messages.LOG_INIT_REQUEST_HANDLER_FAILURE_1, clazz), t);
              return;
          }
          if (initClass instanceof I_CmsRequestHandler) {
              m_requestHandlers.add((I_CmsRequestHandler)initClass);
              if (CmsLog.INIT.isInfoEnabled()) {
                  CmsLog.INIT.info(Messages.get().getBundle().key(Messages.INIT_REQUEST_HANDLER_SUCCESS_1, clazz));
              }
          } else {
              if (CmsLog.INIT.isErrorEnabled()) {
                  CmsLog.INIT.error(Messages.get().getBundle().key(Messages.INIT_REQUEST_HANDLER_INVALID_1, clazz));
              }
          }
      }
docs: Adds a new instance of a request handler class.<p>
  
  @param clazz the class name of the request handler to instantiate and add