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;
}
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;
}