kafka ReplicationUtils 源码
kafka ReplicationUtils 代码
文件路径：/core/src/main/scala/kafka/utils/ReplicationUtils.scala
/**
* 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.utils
import kafka.api.LeaderAndIsr
import kafka.controller.LeaderIsrAndControllerEpoch
import kafka.zk._
import org.apache.kafka.common.TopicPartition
object ReplicationUtils extends Logging {
def updateLeaderAndIsr(zkClient: KafkaZkClient, partition: TopicPartition, newLeaderAndIsr: LeaderAndIsr,
controllerEpoch: Int): (Boolean, Int) = {
debug(s"Updated ISR for $partition to ${newLeaderAndIsr.isr.mkString(",")}")
val path = TopicPartitionStateZNode.path(partition)
val newLeaderData = TopicPartitionStateZNode.encode(LeaderIsrAndControllerEpoch(newLeaderAndIsr, controllerEpoch))
// use the epoch of the controller that made the leadership decision, instead of the current controller epoch
val updatePersistentPath: (Boolean, Int) = zkClient.conditionalUpdatePath(path, newLeaderData,
newLeaderAndIsr.partitionEpoch, Some(checkLeaderAndIsrZkData))
updatePersistentPath
}
private def checkLeaderAndIsrZkData(zkClient: KafkaZkClient, path: String, expectedLeaderAndIsrInfo: Array[Byte]): (Boolean, Int) = {
try {
val (writtenLeaderOpt, writtenStat) = zkClient.getDataAndStat(path)
val expectedLeaderOpt = TopicPartitionStateZNode.decode(expectedLeaderAndIsrInfo, writtenStat)
val succeeded = writtenLeaderOpt.exists { writtenData =>
val writtenLeaderOpt = TopicPartitionStateZNode.decode(writtenData, writtenStat)
(expectedLeaderOpt, writtenLeaderOpt) match {
case (Some(expectedLeader), Some(writtenLeader)) if expectedLeader == writtenLeader => true
case _ => false
}
}
if (succeeded) (true, writtenStat.getVersion)
else (false, -1)
} catch {
case _: Exception => (false, -1)
}
}
}
相关信息
相关文章
0
赞
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
7、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦