315157973 commented on a change in pull request #11518:
URL: https://github.com/apache/pulsar/pull/11518#discussion_r680658929
##########
File path:
pulsar-broker/src/main/java/org/apache/pulsar/broker/service/TopicPoliciesService.java
##########
@@ -54,6 +61,35 @@
*/
TopicPolicies getTopicPolicies(TopicName topicName) throws
TopicPoliciesCacheNotInitException;
+ /**
+ * When getting TopicPolicies, if the initialization has not been
completed,
+ * we will go back off and try again until time out.
+ * @param topicName topic name
+ * @param backoff back off policy
+ * @return CompletableFuture<Optional<TopicPolicies>>
+ */
+ default CompletableFuture<Optional<TopicPolicies>>
getTopicPoliciesAsyncWithRetry(TopicName topicName,
+ final Backoff backoff, ScheduledExecutorService
scheduledExecutorService) {
+ CompletableFuture<Optional<TopicPolicies>> response = new
CompletableFuture<>();
+ Backoff usedBackoff = backoff == null ? new BackoffBuilder()
+ .setInitialTime(500, TimeUnit.MILLISECONDS)
+ .setMandatoryStop(DEFAULT_GET_TOPIC_POLICY_TIMEOUT,
TimeUnit.MILLISECONDS)
+ .setMax(DEFAULT_GET_TOPIC_POLICY_TIMEOUT,
TimeUnit.MILLISECONDS)
+ .create() : backoff;
+ try {
+ RetryUtil.retryAsynchronously(() -> {
+ try {
+ return Optional.ofNullable(getTopicPolicies(topicName));
+ } catch
(BrokerServiceException.TopicPoliciesCacheNotInitException exception) {
+ throw new RuntimeException(exception);
+ }
+ }, usedBackoff, scheduledExecutorService, response);
+ } catch (Exception e) {
+ response.completeExceptionally(e);
Review comment:
Only IllegalArgumentException, NullPointerException,
RejectedExecutionHandler will appear here, there will be no nested exceptions,
so getCause is not needed
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