satishd commented on a change in pull request #11390: URL: https://github.com/apache/kafka/pull/11390#discussion_r784772939
########## File path: core/src/main/scala/kafka/log/remote/RemoteLogManager.scala ########## @@ -0,0 +1,287 @@ +/** + * 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.log.remote + +import kafka.cluster.Partition +import kafka.metrics.KafkaMetricsGroup +import kafka.server.KafkaConfig +import kafka.server.epoch.LeaderEpochFileCache +import kafka.utils.Logging +import org.apache.kafka.common._ +import org.apache.kafka.common.internals.Topic +import org.apache.kafka.common.record.FileRecords.TimestampAndOffset +import org.apache.kafka.common.record.{RecordBatch, RemoteLogInputStream} +import org.apache.kafka.common.utils.{ChildFirstClassLoader, Utils} +import org.apache.kafka.server.log.remote.metadata.storage.{ClassLoaderAwareRemoteLogMetadataManager, TopicBasedRemoteLogMetadataManagerConfig} +import org.apache.kafka.server.log.remote.storage.{RemoteLogManagerConfig, RemoteLogMetadataManager, RemoteLogSegmentMetadata, RemoteStorageManager} + +import java.io.{Closeable, InputStream} +import java.security.{AccessController, PrivilegedAction} +import java.util +import java.util.Optional +import java.util.concurrent.{ConcurrentHashMap, ConcurrentMap} +import scala.collection.Set +import scala.jdk.CollectionConverters._ + +/** + * This class is responsible for + * - initializing `RemoteStorageManager` and `RemoteLogMetadataManager` instances. + * - receives any leader and follower replica events and partition stop events and act on them + * - also provides APIs to fetch indexes, metadata about remote log segments. + * + * @param rlmConfig + * @param brokerId + * @param logDir + */ +class RemoteLogManager(rlmConfig: RemoteLogManagerConfig, + brokerId: Int, + logDir: String) extends Logging with Closeable with KafkaMetricsGroup { + + // topic ids received on leadership changes + private val topicPartitionIds: ConcurrentMap[TopicPartition, Uuid] = new ConcurrentHashMap[TopicPartition, Uuid]() + + private val remoteLogStorageManager: RemoteStorageManager = createRemoteStorageManager() + private val remoteLogMetadataManager: RemoteLogMetadataManager = createRemoteLogMetadataManager() + + private val indexCache = new RemoteIndexCache(remoteStorageManager = remoteLogStorageManager, logDir = logDir) + + private var closed = false + + private[remote] def createRemoteStorageManager(): RemoteStorageManager = { + def createDelegate(classLoader: ClassLoader): RemoteStorageManager = { + classLoader.loadClass(rlmConfig.remoteStorageManagerClassName()) + .getDeclaredConstructor().newInstance().asInstanceOf[RemoteStorageManager] + } + + AccessController.doPrivileged(new PrivilegedAction[RemoteStorageManager] { + private val classPath = rlmConfig.remoteStorageManagerClassPath() + + override def run(): RemoteStorageManager = { + if (classPath != null && classPath.trim.nonEmpty) { + val classLoader = new ChildFirstClassLoader(classPath, this.getClass.getClassLoader) + val delegate = createDelegate(classLoader) + new ClassLoaderAwareRemoteStorageManager(delegate, classLoader) + } else { + createDelegate(this.getClass.getClassLoader) + } + } + }) + } + + private def configureRSM(): Unit = { + val rsmProps = new util.HashMap[String, Any]() + rlmConfig.remoteStorageManagerProps().asScala.foreach { case (k, v) => rsmProps.put(k, v) } + rsmProps.put(KafkaConfig.BrokerIdProp, brokerId) + remoteLogStorageManager.configure(rsmProps) + } + + private[remote] def createRemoteLogMetadataManager(): RemoteLogMetadataManager = { + def createDelegate(classLoader: ClassLoader) = { + classLoader.loadClass(rlmConfig.remoteLogMetadataManagerClassName()) + .getDeclaredConstructor() + .newInstance() + .asInstanceOf[RemoteLogMetadataManager] + } + + AccessController.doPrivileged(new PrivilegedAction[RemoteLogMetadataManager] { + private val classPath = rlmConfig.remoteLogMetadataManagerClassPath + + override def run(): RemoteLogMetadataManager = { + if (classPath != null && classPath.trim.nonEmpty) { + val classLoader = new ChildFirstClassLoader(classPath, this.getClass.getClassLoader) + val delegate = createDelegate(classLoader) + new ClassLoaderAwareRemoteLogMetadataManager(delegate, classLoader) + } else { + createDelegate(this.getClass.getClassLoader) + } + } + }) + } + + private def configureRLMM(): Unit = { + val rlmmProps = new util.HashMap[String, Any]() + rlmConfig.remoteLogMetadataManagerProps().asScala.foreach { case (k, v) => rlmmProps.put(k, v) } + rlmmProps.put(KafkaConfig.BrokerIdProp, brokerId) + rlmmProps.put(KafkaConfig.LogDirProp, logDir) + remoteLogMetadataManager.configure(rlmmProps) + } + + def startup(): Unit = { + // Initialize and configure RSM and RLMM. This will start RSM, RLMM resources which may need to start resources + // in connecting to the brokers or remote storages. + configureRSM() + configureRLMM() + } + + def storageManager(): RemoteStorageManager = { + remoteLogStorageManager + } + + /** + * Callback to receive any leadership changes for the topic partitions assigned to this broker. If there are no + * existing tasks for a given topic partition then it will assign new leader or follower task else it will convert the + * task to respective target state(leader or follower). + * + * @param partitionsBecomeLeader partitions that have become leaders on this broker. + * @param partitionsBecomeFollower partitions that have become followers on this broker. + * @param topicIds topic name to topic id mappings. + */ + def onLeadershipChange(partitionsBecomeLeader: Set[Partition], + partitionsBecomeFollower: Set[Partition], + topicIds: util.Map[String, Uuid]): Unit = { + debug(s"Received leadership changes for leaders: $partitionsBecomeLeader and followers: $partitionsBecomeFollower") + + // Partitions logs are available when this callback is invoked. + // Compact topics and internal topics are filtered here as they are not supported with tiered storage. + def filterPartitions(partitions: Set[Partition]): Set[TopicIdPartition] = { + partitions.filterNot(partition => Topic.isInternal(partition.topic) || Review comment: Good point, I am making a simpler check here to use `filter`. ``` partitions.filter(partition => partition.log.exists(log => log.remoteLogEnabled())) ``` -- This is an automated message from the Apache Git Service. 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