code: protected void clearCaches(CmsEvent event) {
  
          // synchronization of this method is not required as the individual maps are all synchronized maps anyway,
          // and setExportnames() is doing it's own synchronization
  
          // flush all caches
          m_cacheOnlineLinks.clear();
          m_cacheExportUris.clear();
          m_cacheSecureLinks.clear();
          m_cacheExportLinks.clear();
          m_exportnameResources = null;
          if (LOG.isDebugEnabled()) {
              LOG.debug(Messages.get().getBundle().key(Messages.LOG_FLUSHED_CACHES_1, new Integer(event.getType())));
          }
      }
docs: Clears the caches in the export manager.<p>
  
  @param event the event that requested to clear the caches