Examples with ReassignableTopic org.apache.kafka.common.message.AlterPartitionReassignmentsRequestData.ReassignableTopic used on opensource projects

Example 6 with ReassignableTopic

use of org.apache.kafka.common.message.AlterPartitionReassignmentsRequestData.ReassignableTopic in project kafka by apache.

the class KafkaAdminClient method alterPartitionReassignments.

@Override
public AlterPartitionReassignmentsResult alterPartitionReassignments(Map<TopicPartition, Optional<NewPartitionReassignment>> reassignments, AlterPartitionReassignmentsOptions options) {
    final Map<TopicPartition, KafkaFutureImpl<Void>> futures = new HashMap<>();
    final Map<String, Map<Integer, Optional<NewPartitionReassignment>>> topicsToReassignments = new TreeMap<>();
    for (Map.Entry<TopicPartition, Optional<NewPartitionReassignment>> entry : reassignments.entrySet()) {
        String topic = entry.getKey().topic();
        int partition = entry.getKey().partition();
        TopicPartition topicPartition = new TopicPartition(topic, partition);
        Optional<NewPartitionReassignment> reassignment = entry.getValue();
        KafkaFutureImpl<Void> future = new KafkaFutureImpl<>();
        futures.put(topicPartition, future);
        if (topicNameIsUnrepresentable(topic)) {
            future.completeExceptionally(new InvalidTopicException("The given topic name '" + topic + "' cannot be represented in a request."));
        } else if (topicPartition.partition() < 0) {
            future.completeExceptionally(new InvalidTopicException("The given partition index " + topicPartition.partition() + " is not valid."));
        } else {
            Map<Integer, Optional<NewPartitionReassignment>> partitionReassignments = topicsToReassignments.get(topicPartition.topic());
            if (partitionReassignments == null) {
                partitionReassignments = new TreeMap<>();
                topicsToReassignments.put(topic, partitionReassignments);
            }
            partitionReassignments.put(partition, reassignment);
        }
    }
    final long now = time.milliseconds();
    Call call = new Call("alterPartitionReassignments", calcDeadlineMs(now, options.timeoutMs()), new ControllerNodeProvider()) {

        @Override
        public AlterPartitionReassignmentsRequest.Builder createRequest(int timeoutMs) {
            AlterPartitionReassignmentsRequestData data = new AlterPartitionReassignmentsRequestData();
            for (Map.Entry<String, Map<Integer, Optional<NewPartitionReassignment>>> entry : topicsToReassignments.entrySet()) {
                String topicName = entry.getKey();
                Map<Integer, Optional<NewPartitionReassignment>> partitionsToReassignments = entry.getValue();
                List<ReassignablePartition> reassignablePartitions = new ArrayList<>();
                for (Map.Entry<Integer, Optional<NewPartitionReassignment>> partitionEntry : partitionsToReassignments.entrySet()) {
                    int partitionIndex = partitionEntry.getKey();
                    Optional<NewPartitionReassignment> reassignment = partitionEntry.getValue();
                    ReassignablePartition reassignablePartition = new ReassignablePartition().setPartitionIndex(partitionIndex).setReplicas(reassignment.map(NewPartitionReassignment::targetReplicas).orElse(null));
                    reassignablePartitions.add(reassignablePartition);
                }
                ReassignableTopic reassignableTopic = new ReassignableTopic().setName(topicName).setPartitions(reassignablePartitions);
                data.topics().add(reassignableTopic);
            }
            data.setTimeoutMs(timeoutMs);
            return new AlterPartitionReassignmentsRequest.Builder(data);
        }

        @Override
        public void handleResponse(AbstractResponse abstractResponse) {
            AlterPartitionReassignmentsResponse response = (AlterPartitionReassignmentsResponse) abstractResponse;
            Map<TopicPartition, ApiException> errors = new HashMap<>();
            int receivedResponsesCount = 0;
            Errors topLevelError = Errors.forCode(response.data().errorCode());
            switch(topLevelError) {
                case NONE:
                    receivedResponsesCount += validateTopicResponses(response.data().responses(), errors);
                    break;
                case NOT_CONTROLLER:
                    handleNotControllerError(topLevelError);
                    break;
                default:
                    for (ReassignableTopicResponse topicResponse : response.data().responses()) {
                        String topicName = topicResponse.name();
                        for (ReassignablePartitionResponse partition : topicResponse.partitions()) {
                            errors.put(new TopicPartition(topicName, partition.partitionIndex()), new ApiError(topLevelError, response.data().errorMessage()).exception());
                            receivedResponsesCount += 1;
                        }
                    }
                    break;
            }
            assertResponseCountMatch(errors, receivedResponsesCount);
            for (Map.Entry<TopicPartition, ApiException> entry : errors.entrySet()) {
                ApiException exception = entry.getValue();
                if (exception == null)
                    futures.get(entry.getKey()).complete(null);
                else
                    futures.get(entry.getKey()).completeExceptionally(exception);
            }
        }

        private void assertResponseCountMatch(Map<TopicPartition, ApiException> errors, int receivedResponsesCount) {
            int expectedResponsesCount = topicsToReassignments.values().stream().mapToInt(Map::size).sum();
            if (errors.values().stream().noneMatch(Objects::nonNull) && receivedResponsesCount != expectedResponsesCount) {
                String quantifier = receivedResponsesCount > expectedResponsesCount ? "many" : "less";
                throw new UnknownServerException("The server returned too " + quantifier + " results." + "Expected " + expectedResponsesCount + " but received " + receivedResponsesCount);
            }
        }

        private int validateTopicResponses(List<ReassignableTopicResponse> topicResponses, Map<TopicPartition, ApiException> errors) {
            int receivedResponsesCount = 0;
            for (ReassignableTopicResponse topicResponse : topicResponses) {
                String topicName = topicResponse.name();
                for (ReassignablePartitionResponse partResponse : topicResponse.partitions()) {
                    Errors partitionError = Errors.forCode(partResponse.errorCode());
                    TopicPartition tp = new TopicPartition(topicName, partResponse.partitionIndex());
                    if (partitionError == Errors.NONE) {
                        errors.put(tp, null);
                    } else {
                        errors.put(tp, new ApiError(partitionError, partResponse.errorMessage()).exception());
                    }
                    receivedResponsesCount += 1;
                }
            }
            return receivedResponsesCount;
        }

        @Override
        void handleFailure(Throwable throwable) {
            for (KafkaFutureImpl<Void> future : futures.values()) {
                future.completeExceptionally(throwable);
            }
        }
    };
    if (!topicsToReassignments.isEmpty()) {
        runnable.call(call, now);
    }
    return new AlterPartitionReassignmentsResult(new HashMap<>(futures));
}