dajac commented on code in PR #13675: URL: https://github.com/apache/kafka/pull/13675#discussion_r1217619263
########## core/src/main/scala/kafka/coordinator/group/CoordinatorPartitionWriter.scala: ########## @@ -0,0 +1,156 @@ +/* + * 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 kafka.coordinator.group + +import kafka.cluster.PartitionListener +import kafka.server.ReplicaManager +import org.apache.kafka.common.TopicPartition +import org.apache.kafka.common.errors.RecordTooLargeException +import org.apache.kafka.common.protocol.Errors +import org.apache.kafka.common.record.{CompressionType, MemoryRecords, TimestampType} +import org.apache.kafka.common.record.Record.EMPTY_HEADERS +import org.apache.kafka.common.requests.ProduceResponse.PartitionResponse +import org.apache.kafka.common.utils.Time +import org.apache.kafka.coordinator.group.runtime.PartitionWriter +import org.apache.kafka.storage.internals.log.AppendOrigin + +import java.nio.ByteBuffer +import java.util +import scala.collection.Map + +private[group] class ListenerAdaptor( + val listener: PartitionWriter.Listener +) extends PartitionListener { + override def onHighWatermarkUpdated( + tp: TopicPartition, + offset: Long + ): Unit = { + listener.onHighWatermarkUpdated(tp, offset) + } + + override def equals(that: Any): Boolean = that match { + case other: ListenerAdaptor => listener.equals(other.listener) + case _ => false + } + + override def hashCode(): Int = { + listener.hashCode() + } + + override def toString: String = { + s"ListenerAdaptor(listener=$listener)" + } +} + +class CoordinatorPartitionWriter[T]( + replicaManager: ReplicaManager, + serializer: PartitionWriter.Serializer[T], + compressionType: CompressionType, + time: Time +) extends PartitionWriter[T] { + + /** + * Register a PartitionWriter.Listener. + * + * @param tp The partition to register the listener to. + * @param listener The listener. + */ + override def registerListener( + tp: TopicPartition, + listener: PartitionWriter.Listener + ): Unit = { + replicaManager.maybeAddListener(tp, new ListenerAdaptor(listener)) + } + + /** + * Deregister a PartitionWriter.Listener. + * + * @param tp The partition to deregister the listener from. + * @param listener The listener. + */ + override def deregisterListener( + tp: TopicPartition, + listener: PartitionWriter.Listener + ): Unit = { + replicaManager.removeListener(tp, new ListenerAdaptor(listener)) + } + + /** + * Write records to the partitions. Records are written in one batch so + * atomicity is guaranteed. + * + * @param tp The partition to write records to. + * @param records The list of records. The records are written in a single batch. + * @return The log end offset right after the written records. + * @throws KafkaException Any KafkaException caught during the write operation. + */ + override def append( + tp: TopicPartition, + records: util.List[T] + ): Long = { + if (records.isEmpty) throw new IllegalStateException("records must be non-empty.") + + replicaManager.getLogConfig(tp) match { + case Some(logConfig) => + val magic = logConfig.recordVersion.value + val maxBatchSize = logConfig.maxMessageSize + val currentTimeMs = time.milliseconds() + + val recordsBuilder = MemoryRecords.builder( + ByteBuffer.allocate(math.min(16384, maxBatchSize)), + magic, + compressionType, + TimestampType.CREATE_TIME, + 0L, + maxBatchSize + ) + + records.forEach { record => + val keyBytes = serializer.serializeKey(record) + val valueBytes = serializer.serializeValue(record) + + if (recordsBuilder.hasRoomFor(currentTimeMs, keyBytes, valueBytes, EMPTY_HEADERS)) recordsBuilder.append( + currentTimeMs, + keyBytes, + valueBytes, + EMPTY_HEADERS Review Comment: We don't use headers at all in the group coordinator. Headers can be used to stored anything. For regular topics, they are defined by the end users on the Producer. -- 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. To unsubscribe, e-mail: jira-unsubscr...@kafka.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
