satishd commented on a change in pull request #10579: URL: https://github.com/apache/kafka/pull/10579#discussion_r657655966
########## File path: storage/src/main/java/org/apache/kafka/server/log/remote/metadata/storage/ProducerManager.java ########## @@ -0,0 +1,132 @@ +/* + * 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; + +/** + * This class is responsible for publishing messages into the remote log metadata topic partitions. + */ +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; + + // It indicates whether closing process has been started or not. It will not accept any + // messages once it is set as true. + private volatile boolean close = false; + + public ProducerManager(TopicBasedRemoteLogMetadataManagerConfig rlmmConfig, + RemoteLogMetadataTopicPartitioner rlmmTopicPartitioner) { + this.rlmmConfig = rlmmConfig; + this.producer = new KafkaProducer<>(rlmmConfig.producerProperties()); + topicPartitioner = rlmmTopicPartitioner; + } + + public RecordMetadata publishMessage(RemoteLogMetadata remoteLogMetadata) throws KafkaException { + ensureNotClosed(); + + 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); + + ProducerCallback callback = new ProducerCallback(); + try { + if (metadataPartitionNum >= rlmmConfig.metadataTopicPartitionsCount()) { + // This should never occur as long as metadata partitions always remain the same. + throw new KafkaException("Chosen partition no " + metadataPartitionNum + + " is more than the partition count: " + rlmmConfig.metadataTopicPartitionsCount()); Review comment: What about `must be less than the partition count`, conveys the intent clearly. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
