kafka ProducerManager 源码

  • 2022-10-20
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kafka ProducerManager 代码


 * 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,
 * See the License for the specific language governing permissions and
 * limitations under the License.
package org.apache.kafka.server.log.remote.metadata.storage;

import org.apache.kafka.clients.producer.Callback;
import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.ProducerRecord;
import org.apache.kafka.clients.producer.RecordMetadata;
import org.apache.kafka.common.KafkaException;
import org.apache.kafka.common.TopicIdPartition;
import org.apache.kafka.server.log.remote.metadata.storage.serialization.RemoteLogMetadataSerde;
import org.apache.kafka.server.log.remote.storage.RemoteLogMetadata;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.Closeable;
import java.time.Duration;
import java.util.concurrent.CompletableFuture;

 * This class is responsible for publishing messages into the remote log metadata topic partitions.
 * Caller of this class should take care of not sending messages once the closing of this instance is initiated.
public class ProducerManager implements Closeable {
    private static final Logger log = LoggerFactory.getLogger(ProducerManager.class);

    private final RemoteLogMetadataSerde serde = new RemoteLogMetadataSerde();
    private final KafkaProducer<byte[], byte[]> producer;
    private final RemoteLogMetadataTopicPartitioner topicPartitioner;
    private final TopicBasedRemoteLogMetadataManagerConfig rlmmConfig;

    public ProducerManager(TopicBasedRemoteLogMetadataManagerConfig rlmmConfig,
                           RemoteLogMetadataTopicPartitioner rlmmTopicPartitioner) {
        this.rlmmConfig = rlmmConfig;
        this.producer = new KafkaProducer<>(rlmmConfig.producerProperties());
        topicPartitioner = rlmmTopicPartitioner;

     * Returns {@link CompletableFuture} which will complete only after publishing of the given {@code remoteLogMetadata}
     * is considered complete.
     * @param remoteLogMetadata RemoteLogMetadata to be published
     * @return
    public CompletableFuture<RecordMetadata> publishMessage(RemoteLogMetadata remoteLogMetadata) {
        CompletableFuture<RecordMetadata> future = new CompletableFuture<>();

        TopicIdPartition topicIdPartition = remoteLogMetadata.topicIdPartition();
        int metadataPartitionNum = topicPartitioner.metadataPartition(topicIdPartition);
        log.debug("Publishing metadata message of partition:[{}] into metadata topic partition:[{}] with payload: [{}]",
                  topicIdPartition, metadataPartitionNum, remoteLogMetadata);
        if (metadataPartitionNum >= rlmmConfig.metadataTopicPartitionsCount()) {
            // This should never occur as long as metadata partitions always remain the same.
            throw new KafkaException("Chosen partition no " + metadataPartitionNum +
                                             " must be less than the partition count: " + rlmmConfig.metadataTopicPartitionsCount());

        try {
            Callback callback = new Callback() {
                public void onCompletion(RecordMetadata metadata,
                                         Exception exception) {
                    if (exception != null) {
                    } else {
            producer.send(new ProducerRecord<>(rlmmConfig.remoteLogMetadataTopicName(), metadataPartitionNum, null,
                                               serde.serialize(remoteLogMetadata)), callback);
        } catch (Exception ex) {

        return future;

    public void close() {
        try {
        } catch (Exception e) {
            log.error("Error encountered while closing the producer", e);


kafka 源码目录


kafka CommittedOffsetsFile 源码

kafka ConsumerManager 源码

kafka ConsumerTask 源码

kafka FileBasedRemoteLogMetadataCache 源码

kafka RemoteLogLeaderEpochState 源码

kafka RemoteLogMetadataCache 源码

kafka RemoteLogMetadataSnapshotFile 源码

kafka RemoteLogMetadataTopicPartitioner 源码

kafka RemoteLogSegmentMetadataSnapshot 源码

kafka RemotePartitionMetadataEventHandler 源码

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