jiazhai commented on a change in pull request #4963: Add more config for
auto-topic-creation
URL: https://github.com/apache/pulsar/pull/4963#discussion_r321597326
##########
File path:
pulsar-broker/src/main/java/org/apache/pulsar/broker/admin/AdminResource.java
##########
@@ -566,6 +574,78 @@ public PartitionedTopicMetadata deserialize(String key,
byte[] content) throws E
return metadataFuture;
}
+ protected static PartitionedTopicMetadata
fetchPartitionedTopicMetadataCheckAllowAutoCreation(
+ PulsarService pulsar, String path, TopicName topicName) {
+ try {
+ return
fetchPartitionedTopicMetadataCheckAllowAutoCreationAsync(pulsar, path,
topicName)
+ .get();
+ } catch (Exception e) {
+ if (e.getCause() instanceof RestException) {
+ throw (RestException) e;
+ }
+ throw new RestException(e);
+ }
+ }
+
+ protected static CompletableFuture<PartitionedTopicMetadata>
fetchPartitionedTopicMetadataCheckAllowAutoCreationAsync(
+ PulsarService pulsar, String path, TopicName topicName) {
+ CompletableFuture<PartitionedTopicMetadata> metadataFuture = new
CompletableFuture<>();
+ try {
+ boolean allowAutoTopicCreation =
pulsar.getConfiguration().isAllowAutoTopicCreation();
+ String topicType =
pulsar.getConfiguration().getAllowAutoTopicCreationType();
+ boolean topicExist;
+ try {
+ topicExist = pulsar.getNamespaceService()
+ .getListOfTopics(topicName.getNamespaceObject(),
PulsarApi.CommandGetTopicsOfNamespace.Mode.ALL)
+ .contains(topicName.toString());
+ } catch (Exception e) {
+ log.warn("Unexpected error while getting list of topics.
topic={}. Error: {}",
+ topicName, e.getMessage(), e);
+ throw new RestException(e);
+ }
+ fetchPartitionedTopicMetadataAsync(pulsar,
path).whenComplete((metadata, ex) -> {
Review comment:
Discussed with Penghui through slack channel. Penghui's concern is here: the
returned future of `fetchPartitionedTopicMetadataAsync` is completed in
`pulsar.getGlobalZkCache().getDataAsync` callback, so this `whenComplete`
method will be executed in zkcache callback. This has potential to block
zkcache thread.
we should use `whenCompleteAsync` here, then the following method will
execute in a new thread, and could avoid blocking zkcache thread.
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