private boolean updateData() {
    // This will eventually call JMX. Currently we will update this with
    // some dummy data.
    // Connect if required or hold a connection. If unable to connect,
    // return false
    logger.debug("{} :: {}:{}", resourceBundle.getString("LOG_MSG_CLUSTER_DATA_IS_UPDATING"),
        serverName, port);
    return updater.updateData();
  }
calling updateData

@return true if update was successful. false if it failed.
geode-pulse/src/main/java/org/apache/geode/tools/pulse/internal/data/Cluster.java