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KAFKA-18406 Remove ZkBrokerEpochManager.scala (#18561) 

Reviewers: Chia-Ping Tsai <chia7712@gmail.com>
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Ken Huang 2025-01-16 19:35:09 +08:00 committed by GitHub
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core/src/main/scala/kafka/server/ZkBrokerEpochManager.scala
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/*
* 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.controller.KafkaController
import org.apache.kafka.common.requests.AbstractControlRequest
class ZkBrokerEpochManager(metadataCache: MetadataCache,
controller: KafkaController,
lifecycleManagerOpt: Option[BrokerLifecycleManager]) {
def get(): Long = {
lifecycleManagerOpt match {
case Some(lifecycleManager) => metadataCache.getControllerId match {
case Some(_: ZkCachedControllerId) => controller.brokerEpoch
case Some(_: KRaftCachedControllerId) => lifecycleManager.brokerEpoch
case None => controller.brokerEpoch
}
case None => controller.brokerEpoch
}
}
def isBrokerEpochStale(brokerEpochInRequest: Long, isKRaftControllerRequest: Boolean): Boolean = {
if (brokerEpochInRequest == AbstractControlRequest.UNKNOWN_BROKER_EPOCH) {
false
} else if (isKRaftControllerRequest) {
if (lifecycleManagerOpt.isDefined) {
brokerEpochInRequest < lifecycleManagerOpt.get.brokerEpoch
} else {
throw new IllegalStateException("Expected BrokerLifecycleManager to be non-null.")
}
} else {
// brokerEpochInRequest > controller.brokerEpoch is possible in rare scenarios where the controller gets notified
// about the new broker epoch and sends a control request with this epoch before the broker learns about it
brokerEpochInRequest < controller.brokerEpoch
}
}
}