Github user maochf commented on a diff in the pull request:
https://github.com/apache/twill/pull/16#discussion_r94521832
--- Diff:
twill-core/src/main/java/org/apache/twill/internal/kafka/client/SimpleKafkaConsumer.java
---
@@ -273,17 +274,19 @@ private MessageCallback wrapCallback(final
MessageCallback callback,
final AtomicBoolean stopped = new AtomicBoolean();
return new MessageCallback() {
@Override
- public void onReceived(final Iterator<FetchedMessage> messages) {
+ public long onReceived(final Iterator<FetchedMessage> messages) {
if (stopped.get()) {
- return;
+ return Long.MIN_VALUE;
}
- Futures.getUnchecked(executor.submit(new Runnable() {
+ return Futures.getUnchecked(executor.submit(new Callable<Long>()
{
+ long nextOffset = Long.MIN_VALUE;
@Override
- public void run() {
+ public Long call() {
if (stopped.get()) {
- return;
+ return nextOffset;
}
- callback.onReceived(messages);
+ nextOffset = callback.onReceived(messages);
--- End diff --
Because in line 286, the stored `nextOffset` should be returned
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