shanthoosh commented on a change in pull request #918: SAMZA-2094: Implement
the StartpointVisitor for the KafkaSystemConsumer.
URL: https://github.com/apache/samza/pull/918#discussion_r258333559
##########
File path:
samza-kafka/src/main/java/org/apache/samza/system/kafka/KafkaSystemConsumer.java
##########
@@ -159,30 +179,16 @@ private void startSubscription() {
*/
void startConsumer() {
// set the offset for each TopicPartition
- if (topicPartitionsToOffset.size() <= 0) {
+ if (topicPartitionToStartpointMap.size() <= 0) {
LOG.error ("{}: Consumer is not subscribed to any SSPs", this);
}
- topicPartitionsToOffset.forEach((tp, startingOffsetString) -> {
- long startingOffset = Long.valueOf(startingOffsetString);
-
- try {
- synchronized (kafkaConsumer) {
- kafkaConsumer.seek(tp, startingOffset); // this value should already
be the 'upcoming' value
- }
- } catch (Exception e) {
- // all recoverable execptions are handled by the client.
- // if we get here there is nothing left to do but bail out.
- String msg =
- String.format("%s: Got Exception while seeking to %s for partition
%s", this, startingOffsetString, tp);
- LOG.error(msg, e);
- throw new SamzaException(msg, e);
- }
-
- LOG.info("{}: Changing consumer's starting offset for tp = {} to {}",
this, tp, startingOffsetString);
-
+ topicPartitionToStartpointMap.forEach((topicPartition, startpoint) -> {
+ Partition partition = new Partition(topicPartition.partition());
+ SystemStreamPartition systemStreamPartition = new
SystemStreamPartition(systemName, topicPartition.topic(), partition);
+ startpoint.apply(systemStreamPartition,
kafkaStartpointRegistrationHandler);
// add the partition to the proxy
- proxy.addTopicPartition(topicPartitionsToSSP.get(tp), startingOffset);
+ proxy.addTopicPartition(systemStreamPartition,
kafkaConsumer.position(topicPartition));
Review comment:
> Looks like the previous comment about this got marked as "outdated".
Yes, that's the reason why i missed it as well.
Agree with your suggestion. Moved.
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