public void activate() {
   try {
     if (localCluster != null) {
       localCluster.activate(topologyName);
     } else {
       NimbusClient client = NimbusClient.getConfiguredClient(stormConf);
       client.getClient().activate(topologyName);
     }
   } catch (Exception e) {
     System.out.println("activate() exception: " + e);
   }
 }