kafka.api.LeaderAndIsr.scala Maven / Gradle / Ivy
/**
* 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.api
object LeaderAndIsr {
val initialLeaderEpoch: Int = 0
val initialZKVersion: Int = 0
val NoLeader: Int = -1
val LeaderDuringDelete: Int = -2
def apply(leader: Int, isr: List[Int]): LeaderAndIsr = LeaderAndIsr(leader, initialLeaderEpoch, isr, initialZKVersion)
def duringDelete(isr: List[Int]): LeaderAndIsr = LeaderAndIsr(LeaderDuringDelete, isr)
}
case class LeaderAndIsr(leader: Int,
leaderEpoch: Int,
isr: List[Int],
zkVersion: Int) {
def withZkVersion(zkVersion: Int) = copy(zkVersion = zkVersion)
def newLeader(leader: Int) = newLeaderAndIsr(leader, isr)
def newLeaderAndIsr(leader: Int, isr: List[Int]) = LeaderAndIsr(leader, leaderEpoch + 1, isr, zkVersion)
def newEpochAndZkVersion = newLeaderAndIsr(leader, isr)
def leaderOpt: Option[Int] = {
if (leader == LeaderAndIsr.NoLeader) None else Some(leader)
}
override def toString: String = {
s"LeaderAndIsr(leader=$leader, leaderEpoch=$leaderEpoch, isr=$isr, zkVersion=$zkVersion)"
}
}