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/*
* Copyright 2019-2023 the original author or authors.
*
* Licensed 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
*
* https://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.springframework.kafka.requestreply;
import java.nio.charset.StandardCharsets;
import java.time.Duration;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.locks.ReentrantLock;
import java.util.function.BiPredicate;
import java.util.stream.Collectors;
import org.apache.kafka.clients.consumer.Consumer;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.clients.consumer.OffsetAndMetadata;
import org.apache.kafka.common.TopicPartition;
import org.apache.kafka.common.header.Header;
import org.springframework.kafka.core.ProducerFactory;
import org.springframework.kafka.listener.BatchConsumerAwareMessageListener;
import org.springframework.kafka.listener.ContainerProperties.AckMode;
import org.springframework.kafka.listener.GenericMessageListenerContainer;
import org.springframework.kafka.support.KafkaUtils;
import org.springframework.util.Assert;
/**
* A replying template that aggregates multiple replies with the same correlation id.
*
* @param the key type.
* @param the outbound data type.
* @param the reply data type.
*
* @author Gary Russell
* @author Sanghyeok An
* @since 2.3
*
*/
public class AggregatingReplyingKafkaTemplate
extends ReplyingKafkaTemplate>>
implements BatchConsumerAwareMessageListener>> {
/**
* Pseudo topic name for the "outer" {@link ConsumerRecord} that has the aggregated
* results in its value after a normal release by the release strategy.
*/
public static final String AGGREGATED_RESULTS_TOPIC = "aggregatedResults";
/**
* Pseudo topic name for the "outer" {@link ConsumerRecord} that has the aggregated
* results in its value after a timeout.
*/
public static final String PARTIAL_RESULTS_AFTER_TIMEOUT_TOPIC = "partialResultsAfterTimeout";
private static final int DEFAULT_COMMIT_TIMEOUT = 30;
private final ReentrantLock aggregationLock = new ReentrantLock();
private final Map