kafka ProducerManager 源码
kafka ProducerManager 代码
文件路径:/storage/src/main/java/org/apache/kafka/server/log/remote/metadata/storage/ProducerManager.java
/*
* 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.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() {
@Override
public void onCompletion(RecordMetadata metadata,
Exception exception) {
if (exception != null) {
future.completeExceptionally(exception);
} else {
future.complete(metadata);
}
}
};
producer.send(new ProducerRecord<>(rlmmConfig.remoteLogMetadataTopicName(), metadataPartitionNum, null,
serde.serialize(remoteLogMetadata)), callback);
} catch (Exception ex) {
future.completeExceptionally(ex);
}
return future;
}
public void close() {
try {
producer.close(Duration.ofSeconds(30));
} catch (Exception e) {
log.error("Error encountered while closing the producer", e);
}
}
}
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