public void createBackup(String name, boolean force) {
   int specialTimeout = 30 * 60 * 1000; // 30 minutes
   client.getConfig().withReadTimeout(specialTimeout);
   client.getConfig().withConnectionTimeout(specialTimeout);
   UriBuilder builder = client.uriBuilder(BACKUP_CREATE_URL);
   addQueryParam(builder, "tag", name);
   if (force) {
     addQueryParam(builder, "force", true);
   }
   client.postURI(String.class, builder.build());
 }