junrao commented on code in PR #12005: URL: https://github.com/apache/kafka/pull/12005#discussion_r881046709
########## core/src/main/scala/kafka/server/LocalLeaderEndPoint.scala: ########## @@ -0,0 +1,237 @@ +/* + * 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.server + +import kafka.api.Request +import kafka.cluster.BrokerEndPoint +import kafka.server.AbstractFetcherThread.{ReplicaFetch, ResultWithPartitions} +import kafka.server.QuotaFactory.UnboundedQuota +import kafka.utils.Logging +import org.apache.kafka.common.errors.KafkaStorageException +import org.apache.kafka.common.{TopicIdPartition, TopicPartition, Uuid} +import org.apache.kafka.common.message.FetchResponseData +import org.apache.kafka.common.requests.OffsetsForLeaderEpochResponse.UNDEFINED_EPOCH +import org.apache.kafka.common.message.OffsetForLeaderEpochResponseData.EpochEndOffset +import org.apache.kafka.common.protocol.{ApiKeys, Errors} +import org.apache.kafka.common.requests.{FetchRequest, FetchResponse, RequestUtils} + +import java.util +import java.util.Optional +import scala.collection.{Map, Seq, Set, mutable} +import scala.compat.java8.OptionConverters.RichOptionForJava8 +import scala.jdk.CollectionConverters._ + +/** + * Facilitates fetches from a local replica leader. + * + * @param sourceBroker The broker (host:port) that we want to connect to + * @param brokerConfig A config file with broker related configurations + * @param replicaMgr A ReplicaManager + * @param quota The quota, used when building a fetch request + */ +class LocalLeaderEndPoint(sourceBroker: BrokerEndPoint, + brokerConfig: KafkaConfig, + replicaMgr: ReplicaManager, + quota: ReplicaQuota) extends LeaderEndPoint with Logging { + + private val replicaId = brokerConfig.brokerId + private val maxBytes = brokerConfig.replicaFetchResponseMaxBytes + private val fetchSize = brokerConfig.replicaFetchMaxBytes + private var inProgressPartition: Option[TopicPartition] = None + + override val isTruncationOnFetchSupported: Boolean = false + + override def initiateClose(): Unit = {} // do nothing + + override def close(): Unit = {} // do nothing + + override def brokerEndPoint(): BrokerEndPoint = sourceBroker + + override def fetch(fetchRequest: FetchRequest.Builder): collection.Map[TopicPartition, FetchData] = { + var partitionData: Seq[(TopicPartition, FetchData)] = null + val request = fetchRequest.build() + + // We can build the map from the request since it contains topic IDs and names. + // Only one ID can be associated with a name and vice versa. + val topicNames = new mutable.HashMap[Uuid, String]() + request.data.topics.forEach { topic => + topicNames.put(topic.topicId, topic.topic) + } + + Review Comment: extra new line -- 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
