kafka PartitionView 源码
kafka PartitionView 代码
文件路径：/clients/src/main/java/org/apache/kafka/common/replica/PartitionView.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.common.replica;
import java.util.Collections;
import java.util.Objects;
import java.util.Set;
/**
* View of a partition used by {@link ReplicaSelector} to determine a preferred replica.
*/
public interface PartitionView {
Set<ReplicaView> replicas();
ReplicaView leader();
class DefaultPartitionView implements PartitionView {
private final Set<ReplicaView> replicas;
private final ReplicaView leader;
public DefaultPartitionView(Set<ReplicaView> replicas, ReplicaView leader) {
this.replicas = Collections.unmodifiableSet(replicas);
this.leader = leader;
}
@Override
public Set<ReplicaView> replicas() {
return replicas;
}
@Override
public ReplicaView leader() {
return leader;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
DefaultPartitionView that = (DefaultPartitionView) o;
return Objects.equals(replicas, that.replicas) &&
Objects.equals(leader, that.leader);
}
@Override
public int hashCode() {
return Objects.hash(replicas, leader);
}
@Override
public String toString() {
return "DefaultPartitionView{" +
"replicas=" + replicas +
", leader=" + leader +
'}';
}
}
}
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