jiazhai commented on a change in pull request #2400: PIP-22: Dead Letter Topic
URL: https://github.com/apache/incubator-pulsar/pull/2400#discussion_r212514520
##########
File path:
pulsar-broker/src/main/java/org/apache/pulsar/broker/service/persistent/PersistentDispatcherMultipleConsumers.java
##########
@@ -132,11 +156,44 @@ public synchronized void addConsumer(Consumer consumer)
throws BrokerServiceExce
throw new ConsumerBusyException("Subscription reached max
consumers limit");
}
+ deadLetterTopicProducer = newDeadLetterProducer();
+
consumerList.add(consumer);
consumerList.sort((c1, c2) -> c1.getPriorityLevel() -
c2.getPriorityLevel());
consumerSet.add(consumer);
}
+ private ProducerImpl<byte[]> newDeadLetterProducer() throws
BrokerServiceException {
+ if (maxRedeliveryCount > 0 && deadLetterTopicProducer == null) {
+ try {
+ if (maxRedeliveryCount > 0 &&
StringUtils.isBlank(deadLetterTopic)) {
+ deadLetterTopic = String.format("%s-%s-DLQ",
topic.getName(), Codec.decode(cursor.getName()));
Review comment:
Seems it is up to application to decide. In this change, application can
choose its own name, and only use “-DLQ” when the application doesn’t specify.
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