chia7712 commented on a change in pull request #10275: URL: https://github.com/apache/kafka/pull/10275#discussion_r591036839
########## File path: clients/src/main/java/org/apache/kafka/clients/admin/internals/DescribeProducersHandler.java ########## @@ -0,0 +1,213 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.kafka.clients.admin.internals; + +import org.apache.kafka.clients.admin.DescribeProducersOptions; +import org.apache.kafka.clients.admin.DescribeProducersResult.PartitionProducerState; +import org.apache.kafka.clients.admin.ProducerState; +import org.apache.kafka.common.TopicPartition; +import org.apache.kafka.common.errors.InvalidTopicException; +import org.apache.kafka.common.errors.TopicAuthorizationException; +import org.apache.kafka.common.message.DescribeProducersRequestData; +import org.apache.kafka.common.message.DescribeProducersResponseData; +import org.apache.kafka.common.protocol.Errors; +import org.apache.kafka.common.requests.AbstractResponse; +import org.apache.kafka.common.requests.ApiError; +import org.apache.kafka.common.requests.DescribeProducersRequest; +import org.apache.kafka.common.requests.DescribeProducersResponse; +import org.apache.kafka.common.utils.CollectionUtils; +import org.apache.kafka.common.utils.LogContext; +import org.apache.kafka.common.utils.Utils; +import org.slf4j.Logger; + +import java.util.ArrayList; +import java.util.Collections; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.Optional; +import java.util.OptionalInt; +import java.util.OptionalLong; +import java.util.Set; +import java.util.stream.Collectors; + +public class DescribeProducersHandler implements AdminApiHandler<TopicPartition, PartitionProducerState> { + private final LogContext logContext; + private final Logger log; + private final DescribeProducersOptions options; + private final Set<TopicPartition> topicPartitions; + + public DescribeProducersHandler( + Set<TopicPartition> topicPartitions, + DescribeProducersOptions options, + LogContext logContext + ) { + this.topicPartitions = Collections.unmodifiableSet(topicPartitions); + this.options = options; + this.log = logContext.logger(DescribeProducersHandler.class); + this.logContext = logContext; + } + + @Override + public String apiName() { + return "describeProducers"; + } + + @Override + public KeyMappings<TopicPartition> initializeKeys() { + if (options.brokerId().isPresent()) { + // If the options indicate a specific broker, then we can skip the lookup step + int destinationBrokerId = options.brokerId().getAsInt(); + Map<TopicPartition, Integer> staticMappedPartitions = + Utils.initializeMap(topicPartitions, () -> destinationBrokerId); + return new KeyMappings<>( + Optional.of(new StaticKeyMapping<>(staticMappedPartitions)), + Optional.empty() + ); + } else { + PartitionLeaderStrategy lookupStrategy = + new PartitionLeaderStrategy(topicPartitions, logContext); + return new KeyMappings<>( + Optional.empty(), + Optional.of(new DynamicKeyMapping<>(topicPartitions, lookupStrategy)) + ); + } + } + + @Override + public DescribeProducersRequest.Builder buildRequest( + Integer brokerId, + Set<TopicPartition> topicPartitions + ) { + DescribeProducersRequestData request = new DescribeProducersRequestData(); + DescribeProducersRequest.Builder builder = new DescribeProducersRequest.Builder(request); + + CollectionUtils.groupPartitionsByTopic( + topicPartitions, + builder::addTopic, + (topicRequest, partitionId) -> topicRequest.partitionIndexes().add(partitionId) + ); + + return builder; + } + + private void handlePartitionError( + TopicPartition topicPartition, + ApiError apiError, + Map<TopicPartition, Throwable> failed, + List<TopicPartition> unmapped + ) { + switch (apiError.error()) { + case NOT_LEADER_OR_FOLLOWER: + if (options.brokerId().isPresent()) { + // Typically these errors are retriable, but if the user specified the brokerId + // explicitly, then they are fatal. + int brokerId = options.brokerId().getAsInt(); + log.error("Not leader error in `DescribeProducers` response for partition {} " + + "for brokerId {} set in options", topicPartition, brokerId, apiError.exception()); Review comment: Good to know that. thanks! ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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