epsteina16 commented on a change in pull request #4768: Expose acknowledgment
flushing capabilities at the consumer level
URL: https://github.com/apache/pulsar/pull/4768#discussion_r306891788
##########
File path:
pulsar-client-api/src/main/java/org/apache/pulsar/client/api/Consumer.java
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@@ -255,6 +255,13 @@
* @return a future that can be used to track the completion of the
operation
*/
CompletableFuture<Void> acknowledgeCumulativeAsync(MessageId messageId);
+
+ /**
+ * Flush all batched acknowledgements and wait until all acknowledgments
have been persisted.
+ *
+ * Flush acks returns immediately if batching of acks is disabled.
+ */
+ void flushAcknowledgements();
Review comment:
It looks like netty's flush call starts a thread for running the flush
action, but there is no callback for the client. So it is not a blocking call
waiting for the data to be written to the wire.
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