artemlivshits commented on code in PR #15470:
URL: https://github.com/apache/kafka/pull/15470#discussion_r1523702932
##########
clients/src/main/java/org/apache/kafka/clients/admin/KafkaAdminClient.java:
##########
@@ -2184,9 +2178,139 @@ void handleFailure(Throwable throwable) {
completeAllExceptionally(topicFutures.values(), throwable);
}
};
- if (!topicNamesList.isEmpty()) {
- runnable.call(call, now);
+ return call;
+ }
+
+ @SuppressWarnings({"MethodLength", "NPathComplexity"})
+ private Map<String, KafkaFuture<TopicDescription>>
handleDescribeTopicsByNamesWithDescribeTopicPartitionsApi(
+ final Collection<String> topicNames,
+ DescribeTopicsOptions options
+ ) {
+ final Map<String, KafkaFutureImpl<TopicDescription>> topicFutures =
new HashMap<>(topicNames.size());
+ final ArrayList<String> topicNamesList = new ArrayList<>();
+ for (String topicName : topicNames) {
+ if (topicNameIsUnrepresentable(topicName)) {
+ KafkaFutureImpl<TopicDescription> future = new
KafkaFutureImpl<>();
+ future.completeExceptionally(new InvalidTopicException("The
given topic name '" +
+ topicName + "' cannot be represented in a request."));
+ topicFutures.put(topicName, future);
+ } else if (!topicFutures.containsKey(topicName)) {
+ topicFutures.put(topicName, new KafkaFutureImpl<>());
+ topicNamesList.add(topicName);
+ }
}
+
+ if (topicNamesList.isEmpty()) {
+ return new HashMap<>(topicFutures);
+ }
+
+ // First, we need to retrieve the node info.
+ DescribeClusterResult clusterResult = describeCluster();
+ Map<Integer, Node> nodes;
+ try {
+ nodes =
clusterResult.nodes().get().stream().collect(Collectors.toMap(Node::id, node ->
node));
+ } catch (InterruptedException | ExecutionException e) {
+ completeAllExceptionally(topicFutures.values(), e.getCause());
+ return new HashMap<>(topicFutures);
+ }
+
+ final long now = time.milliseconds();
+ Call call = new Call("describeTopicPartitions", calcDeadlineMs(now,
options.timeoutMs()),
+ new LeastLoadedNodeProvider()) {
+ Map<String, TopicRequest> pendingTopics =
+ topicNamesList.stream().map(topicName -> new
TopicRequest().setName(topicName))
+ .collect(Collectors.toMap(topicRequest ->
topicRequest.name(), topicRequest -> topicRequest, (t1, t2) -> t1,
TreeMap::new));
+
+ TopicDescription partiallyFinishedTopicDescription = null;
+ TopicDescription nextTopicDescription = null;
+
+ @Override
+ DescribeTopicPartitionsRequest.Builder createRequest(int
timeoutMs) {
+ DescribeTopicPartitionsRequestData request = new
DescribeTopicPartitionsRequestData()
+ .setTopics(new ArrayList<>(pendingTopics.values()))
+
.setResponsePartitionLimit(options.partitionSizeLimitPerResponse());
+ if (partiallyFinishedTopicDescription != null) {
Review Comment:
Ideally we should drive the pagination from the cursor, rather than
spreading the logic between multiple states. We plan to get rid of topic list
eventually and this logic would be easy to miss.
##########
clients/src/main/java/org/apache/kafka/clients/admin/KafkaAdminClient.java:
##########
@@ -2184,9 +2178,139 @@ void handleFailure(Throwable throwable) {
completeAllExceptionally(topicFutures.values(), throwable);
}
};
- if (!topicNamesList.isEmpty()) {
- runnable.call(call, now);
+ return call;
+ }
+
+ @SuppressWarnings({"MethodLength", "NPathComplexity"})
+ private Map<String, KafkaFuture<TopicDescription>>
handleDescribeTopicsByNamesWithDescribeTopicPartitionsApi(
+ final Collection<String> topicNames,
+ DescribeTopicsOptions options
+ ) {
+ final Map<String, KafkaFutureImpl<TopicDescription>> topicFutures =
new HashMap<>(topicNames.size());
+ final ArrayList<String> topicNamesList = new ArrayList<>();
+ for (String topicName : topicNames) {
+ if (topicNameIsUnrepresentable(topicName)) {
+ KafkaFutureImpl<TopicDescription> future = new
KafkaFutureImpl<>();
+ future.completeExceptionally(new InvalidTopicException("The
given topic name '" +
+ topicName + "' cannot be represented in a request."));
+ topicFutures.put(topicName, future);
+ } else if (!topicFutures.containsKey(topicName)) {
+ topicFutures.put(topicName, new KafkaFutureImpl<>());
+ topicNamesList.add(topicName);
+ }
}
+
+ if (topicNamesList.isEmpty()) {
+ return new HashMap<>(topicFutures);
+ }
+
+ // First, we need to retrieve the node info.
+ DescribeClusterResult clusterResult = describeCluster();
+ Map<Integer, Node> nodes;
+ try {
+ nodes =
clusterResult.nodes().get().stream().collect(Collectors.toMap(Node::id, node ->
node));
+ } catch (InterruptedException | ExecutionException e) {
+ completeAllExceptionally(topicFutures.values(), e.getCause());
+ return new HashMap<>(topicFutures);
+ }
+
+ final long now = time.milliseconds();
+ Call call = new Call("describeTopicPartitions", calcDeadlineMs(now,
options.timeoutMs()),
+ new LeastLoadedNodeProvider()) {
+ Map<String, TopicRequest> pendingTopics =
+ topicNamesList.stream().map(topicName -> new
TopicRequest().setName(topicName))
+ .collect(Collectors.toMap(topicRequest ->
topicRequest.name(), topicRequest -> topicRequest, (t1, t2) -> t1,
TreeMap::new));
+
+ TopicDescription partiallyFinishedTopicDescription = null;
+ TopicDescription nextTopicDescription = null;
+
+ @Override
+ DescribeTopicPartitionsRequest.Builder createRequest(int
timeoutMs) {
+ DescribeTopicPartitionsRequestData request = new
DescribeTopicPartitionsRequestData()
+ .setTopics(new ArrayList<>(pendingTopics.values()))
+
.setResponsePartitionLimit(options.partitionSizeLimitPerResponse());
+ if (partiallyFinishedTopicDescription != null) {
+ request.setCursor(new
DescribeTopicPartitionsRequestData.Cursor()
+ .setTopicName(partiallyFinishedTopicDescription.name())
+
.setPartitionIndex(partiallyFinishedTopicDescription.partitions().size())
+ );
+ }
+ return new DescribeTopicPartitionsRequest.Builder(request);
+ }
+
+ @Override
+ void handleResponse(AbstractResponse abstractResponse) {
+ DescribeTopicPartitionsResponse response =
(DescribeTopicPartitionsResponse) abstractResponse;
+ DescribeTopicPartitionsResponseData.Cursor responseCursor =
response.data().nextCursor();
+
+ 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());
+ pendingTopics.remove(topicName);
+ if (responseCursor != null &&
responseCursor.topicName().equals(topicName)) {
+ responseCursor = null;
+ }
+ continue;
+ }
+
+ TopicDescription currentTopicDescription =
getTopicDescriptionFromDescribeTopicsResponseTopic(topic, nodes);
+
+ if (partiallyFinishedTopicDescription != null &&
partiallyFinishedTopicDescription.name().equals(topicName)) {
+
partiallyFinishedTopicDescription.partitions().addAll(currentTopicDescription.partitions());
+ continue;
+ }
+
+ if (responseCursor != null &&
responseCursor.topicName().equals(topicName)) {
+ // This is the first time this topic being pointed by
the cursor.
+ nextTopicDescription = currentTopicDescription;
+ continue;
+ }
Review Comment:
Ok, sounds good. Can we add a comment that explains what you've just said
above? Also seems like nextTopicDescription can be just a local in the
function, not a member in the class.
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