Example #1
0
  public byte[] readLastMessage(String zookeeperConnect, String topic, int partition) {

    KafkaUtils ku = new KafkaUtils();

    PartitionMetadata pm = ku.findLeader(zookeeperConnect, topic, partition);
    long logSize = ku.getLogSize(pm.leader().host(), pm.leader().port(), topic, partition);

    LOG.debug("Topic size [" + logSize + "]");
    if (logSize == 0) return null;
    long start = System.currentTimeMillis();
    LOG.debug("Read last message start time(ms) " + start);
    byte[] bb = ku.readAtOffSet(pm.leader().host(), pm.leader().port(), topic, logSize - 1, 0);
    LOG.debug("End read last message  time(ms) " + (System.currentTimeMillis() - start));

    return bb;
  }
Example #2
0
  public boolean checkTopicIsEmpty(String zookeeperConnect, String topic, int partition)
      throws CheckTopicFailureException {

    try {
      KafkaUtils ku = new KafkaUtils();
      PartitionMetadata pm = ku.findLeader(zookeeperConnect, topic, partition);
      long logSize = ku.getLogSize(pm.leader().host(), pm.leader().port(), topic, 0);

      LOG.debug("Topic Size " + logSize);
      if (logSize == 0) return true;

      // to be sure there are not previous messages
      byte[] bb = ku.readAtOffSet(pm.leader().host(), pm.leader().port(), topic, logSize - 1, 0);
      if (bb == null) return true;
    } catch (Exception e) {
      throw new CheckTopicFailureException(e);
    }

    return false;
  }