cmccabe commented on code in PR #14306: URL: https://github.com/apache/kafka/pull/14306#discussion_r1312373575
########## core/src/main/scala/kafka/server/ControllerRegistrationManager.scala: ########## @@ -0,0 +1,307 @@ +/** + * 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 java.util +import java.util.concurrent.TimeUnit.MILLISECONDS +import kafka.utils.Logging +import org.apache.kafka.clients.ClientResponse +import org.apache.kafka.common.Uuid +import org.apache.kafka.common.message.ControllerRegistrationRequestData.ListenerCollection +import org.apache.kafka.common.message.ControllerRegistrationRequestData +import org.apache.kafka.common.protocol.Errors +import org.apache.kafka.common.requests.{ControllerRegistrationRequest, ControllerRegistrationResponse} +import org.apache.kafka.metadata.VersionRange +import org.apache.kafka.common.utils.{ExponentialBackoff, LogContext, Time} +import org.apache.kafka.image.loader.LoaderManifest +import org.apache.kafka.image.{MetadataDelta, MetadataImage} +import org.apache.kafka.image.publisher.MetadataPublisher +import org.apache.kafka.queue.EventQueue.DeadlineFunction +import org.apache.kafka.queue.{EventQueue, KafkaEventQueue} +import org.apache.kafka.server.common.MetadataVersion + +import scala.jdk.CollectionConverters._ + +/** + * The broker lifecycle manager owns the broker state. + * + * Its inputs are messages passed in from other parts of the broker and from the + * controller: requests to start up, or shut down, for example. Its output are the broker + * state and various futures that can be used to wait for broker state transitions to + * occur. + * + * The lifecycle manager handles registering the broker with the controller, as described + * in KIP-631. After registration is complete, it handles sending periodic broker + * heartbeats and processing the responses. + * + * This code uses an event queue paradigm. Modifications get translated into events, which + * are placed on the queue to be processed sequentially. As described in the JavaDoc for + * each variable, most mutable state can be accessed only from that event queue thread. + * In some cases we expose a volatile variable which can be read from any thread, but only + * written from the event queue thread. + */ +class ControllerRegistrationManager( + val config: KafkaConfig, + val clusterId: String, + val time: Time, + val threadNamePrefix: String, + val supportedFeatures: util.Map[String, VersionRange], + val incarnationId: Uuid, + val resendExponentialBackoff: ExponentialBackoff = new ExponentialBackoff(100, 2, 120000L, 0.02) +) extends Logging with MetadataPublisher { + override def name(): String = "ControllerRegistrationManager" + + val nodeId: Int = config.nodeId + + private def logPrefix(): String = { + val builder = new StringBuilder("[ControllerRegistrationManager") + builder.append(" id=").append(config.nodeId) + builder.append(" incarnation=").append(incarnationId) + builder.append("] ") + builder.toString() + } + + val logContext = new LogContext(logPrefix()) + + this.logIdent = logContext.logPrefix() + + val listenerCollection = { + val collection = new ListenerCollection() + config.controllerListeners.foreach(endPoint => { + collection.add(new ControllerRegistrationRequestData.Listener(). + setHost(endPoint.host). + setName(endPoint.listenerName.value()). + setPort(endPoint.port). + setSecurityProtocol(endPoint.securityProtocol.id)) + }) + collection + } + + /** + * The number of RPCs that we are waiting for. Only read or written from the event queue thread. + */ + var pendingRpcs = 0L Review Comment: ok -- 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
