kafka LeaderAndEpoch 源码
kafka LeaderAndEpoch 代码
文件路径：/raft/src/main/java/org/apache/kafka/raft/LeaderAndEpoch.java
/*
* 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 org.apache.kafka.raft;
import java.util.Objects;
import java.util.OptionalInt;
public class LeaderAndEpoch {
private final OptionalInt leaderId;
private final int epoch;
public static final LeaderAndEpoch UNKNOWN = new LeaderAndEpoch(OptionalInt.empty(), 0);
public LeaderAndEpoch(OptionalInt leaderId, int epoch) {
this.leaderId = Objects.requireNonNull(leaderId);
this.epoch = epoch;
}
public OptionalInt leaderId() {
return leaderId;
}
public int epoch() {
return epoch;
}
public boolean isLeader(int nodeId) {
return leaderId.isPresent() && leaderId.getAsInt() == nodeId;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
LeaderAndEpoch that = (LeaderAndEpoch) o;
return epoch == that.epoch &&
leaderId.equals(that.leaderId);
}
@Override
public int hashCode() {
return Objects.hash(leaderId, epoch);
}
@Override
public String toString() {
return "LeaderAndEpoch(" +
"leaderId=" + leaderId +
", epoch=" + epoch +
')';
}
}
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