syhily commented on a change in pull request #17452:
URL: https://github.com/apache/flink/pull/17452#discussion_r805890545
##########
File path:
flink-connectors/flink-connector-pulsar/src/main/java/org/apache/flink/connector/pulsar/sink/writer/PulsarWriter.java
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@@ -205,6 +209,12 @@ public void write(IN element, Context context) throws
IOException, InterruptedEx
builder.disableReplication();
}
+ // Message Delay
+ long deliverAt = messageDelayer.deliverAt(element, context);
+ if (deliverAt > 0) {
+ builder.deliverAt(deliverAt);
Review comment:
Message delayer would only add an extra `sending time` property. It
doesn't change any behavior of the message sending. A message with delayer
would be normally sent, flushed on the checkpoint, and so on. We add this
feature for some user-specified requirements, [message delay
delivery](https://pulsar.apache.org/docs/en/next/concepts-messaging/#delayed-message-delivery)
is wildly used in some companies like Baidu.
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