mattisonchao commented on code in PR #20551:
URL: https://github.com/apache/pulsar/pull/20551#discussion_r1226244835
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pulsar-broker/src/main/java/org/apache/pulsar/broker/loadbalance/extensions/ExtensibleLoadManagerImpl.java:
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@@ -342,56 +344,101 @@ public CompletableFuture<Optional<BrokerLookupData>>
assign(Optional<ServiceUnit
final String bundle = serviceUnit.toString();
- CompletableFuture<Optional<BrokerLookupData>> future =
lookupRequests.computeIfAbsent(bundle, k -> {
+ return dedupeLookupRequest(bundle, k -> {
final CompletableFuture<Optional<String>> owner;
// Assign the bundle to channel owner if is internal topic, to
avoid circular references.
if (topic.isPresent() && isInternalTopic(topic.get().toString())) {
owner = serviceUnitStateChannel.getChannelOwnerAsync();
} else {
- owner =
serviceUnitStateChannel.getOwnerAsync(bundle).thenCompose(broker -> {
- // If the bundle not assign yet, select and publish assign
event to channel.
- if (broker.isEmpty()) {
- return
this.selectAsync(serviceUnit).thenCompose(brokerOpt -> {
- if (brokerOpt.isPresent()) {
- assignCounter.incrementSuccess();
- log.info("Selected new owner broker: {} for
bundle: {}.", brokerOpt.get(), bundle);
- return
serviceUnitStateChannel.publishAssignEventAsync(bundle, brokerOpt.get())
- .thenApply(Optional::of);
- } else {
- throw new IllegalStateException(
- "Failed to select the new owner broker
for bundle: " + bundle);
- }
- });
+ owner = getOwnerAsync(serviceUnit, bundle, false);
+ }
+ return getBrokerLookupData(owner, bundle);
+ });
+ }
+
+ private CompletableFuture<Optional<String>> getOwnerAsync(
Review Comment:
Since you are using the `Optional.of` in the inner logic(never null), we can
discard the `Optional`.
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