artemlivshits commented on code in PR #15265:
URL: https://github.com/apache/kafka/pull/15265#discussion_r1491416954
##########
clients/src/main/java/org/apache/kafka/clients/admin/KafkaAdminClient.java:
##########
@@ -2129,63 +2167,183 @@ private Map<String, KafkaFuture<TopicDescription>>
handleDescribeTopicsByNames(f
}
}
final long now = time.milliseconds();
- Call call = new Call("describeTopics", calcDeadlineMs(now,
options.timeoutMs()),
- new LeastLoadedNodeProvider()) {
- private boolean supportsDisablingTopicCreation = true;
+ if (options.useDescribeTopicsApi()) {
+ RecurringCall call = new RecurringCall("DescribeTopics-Recurring",
calcDeadlineMs(now, options.timeoutMs()), runnable) {
+ Map<String, TopicRequest> pendingTopics =
+ topicNames.stream().map(topicName -> new
TopicRequest().setName(topicName))
+ .collect(Collectors.toMap(topicRequest ->
topicRequest.name(), topicRequest -> topicRequest, (t1, t2) -> t1, TreeMap::new)
+ );
- @Override
- MetadataRequest.Builder createRequest(int timeoutMs) {
- if (supportsDisablingTopicCreation)
- return new MetadataRequest.Builder(new
MetadataRequestData()
-
.setTopics(convertToMetadataRequestTopic(topicNamesList))
- .setAllowAutoTopicCreation(false)
-
.setIncludeTopicAuthorizedOperations(options.includeAuthorizedOperations()));
- else
- return MetadataRequest.Builder.allTopics();
- }
+ String partiallyFinishedTopicName = "";
+ int partiallyFinishedTopicNextPartitionId = -1;
+ TopicDescription partiallyFinishedTopicDescription = null;
- @Override
- void handleResponse(AbstractResponse abstractResponse) {
- MetadataResponse response = (MetadataResponse)
abstractResponse;
- // Handle server responses for particular topics.
- Cluster cluster = response.buildCluster();
- Map<String, Errors> errors = response.errors();
- for (Map.Entry<String, KafkaFutureImpl<TopicDescription>>
entry : topicFutures.entrySet()) {
- String topicName = entry.getKey();
- KafkaFutureImpl<TopicDescription> future =
entry.getValue();
- Errors topicError = errors.get(topicName);
- if (topicError != null) {
- future.completeExceptionally(topicError.exception());
- continue;
+ @Override
+ Call generateCall() {
+ return new Call("describeTopics", this.deadlineMs, new
LeastLoadedNodeProvider()) {
+ @Override
+ DescribeTopicPartitionsRequest.Builder
createRequest(int timeoutMs) {
+ DescribeTopicPartitionsRequestData request = new
DescribeTopicPartitionsRequestData()
+
.setTopics(pendingTopics.values().stream().collect(Collectors.toList()))
+
.setResponsePartitionLimit(options.partitionSizeLimitPerResponse());
+ if (!partiallyFinishedTopicName.isEmpty()) {
+ request.setCursor(new
DescribeTopicPartitionsRequestData.Cursor()
+ .setTopicName(partiallyFinishedTopicName)
+
.setPartitionIndex(partiallyFinishedTopicNextPartitionId)
+ );
+ }
+ return new
DescribeTopicPartitionsRequest.Builder(request);
+ }
+
+ @Override
+ void handleResponse(AbstractResponse abstractResponse)
{
+ DescribeTopicPartitionsResponse response =
(DescribeTopicPartitionsResponse) abstractResponse;
+ String cursorTopicName = "";
+ int cursorPartitionId = -1;
+ if (response.data().nextCursor() != null) {
+ DescribeTopicPartitionsResponseData.Cursor
cursor = response.data().nextCursor();
+ cursorTopicName = cursor.topicName();
+ cursorPartitionId = cursor.partitionIndex();
+ }
+
+ for (DescribeTopicPartitionsResponseTopic topic :
response.data().topics()) {
+ String topicName = topic.name();
+ Errors error =
Errors.forCode(topic.errorCode());
+
+ KafkaFutureImpl<TopicDescription> future =
topicFutures.get(topicName);
+ if (error != Errors.NONE) {
+
future.completeExceptionally(error.exception());
+ topicFutures.remove(topicName);
+ pendingTopics.remove(topicName);
+ if
(partiallyFinishedTopicName.equals(topicName)) {
+ partiallyFinishedTopicName = "";
+ partiallyFinishedTopicNextPartitionId
= -1;
+ partiallyFinishedTopicDescription =
null;
+ }
+ if (cursorTopicName.equals(topicName)) {
+ cursorTopicName = "";
+ cursorPartitionId = -1;
+ }
+ continue;
+ }
+
+ TopicDescription currentTopicDescription =
getTopicDescriptionFromDescribeTopicsResponseTopic(topic);
+
+ if
(partiallyFinishedTopicName.equals(topicName)) {
+ if (partiallyFinishedTopicDescription ==
null) {
+ partiallyFinishedTopicDescription =
currentTopicDescription;
+ } else {
+
partiallyFinishedTopicDescription.partitions().addAll(currentTopicDescription.partitions());
+ }
+
+ if (!cursorTopicName.equals(topicName)) {
+ pendingTopics.remove(topicName);
+
future.complete(partiallyFinishedTopicDescription);
+ partiallyFinishedTopicDescription =
null;
+ }
+ continue;
+ }
+
+ if (cursorTopicName.equals(topicName)) {
+ partiallyFinishedTopicDescription =
currentTopicDescription;
+ continue;
+ }
+
+ pendingTopics.remove(topicName);
+ future.complete(currentTopicDescription);
+ }
+ partiallyFinishedTopicName = cursorTopicName;
+ partiallyFinishedTopicNextPartitionId =
cursorPartitionId;
+ if (pendingTopics.isEmpty()) {
+ handleNonExistingTopics();
+ nextRun.complete(false);
+ } else {
+ nextRun.complete(true);
+ }
+ }
+
+ @Override
+ boolean
handleUnsupportedVersionException(UnsupportedVersionException exception) {
+ return false;
+ }
+
+ @Override
+ void handleFailure(Throwable throwable) {
+ completeAllExceptionally(topicFutures.values(),
throwable);
+ nextRun.completeExceptionally(throwable);
+ }
+ };
+ }
+
+ void handleNonExistingTopics() {
+ for (Map.Entry<String, KafkaFutureImpl<TopicDescription>>
entry : topicFutures.entrySet()) {
+ if (!entry.getValue().isDone()) {
+ entry.getValue().completeExceptionally(new
UnknownTopicOrPartitionException("Topic " + entry.getKey() + " not found."));
+ }
}
- if (!cluster.topics().contains(topicName)) {
- future.completeExceptionally(new
UnknownTopicOrPartitionException("Topic " + topicName + " not found."));
- continue;
+ }
+ };
+ call.run();
Review Comment:
I agree that option 3 would provide the most intuitive interface, I think 1
& 2 would hide streaming semantics behind an interface that is generally
expected to be "in memory".
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
