kafka PartitionReassignmentReplicas 源码
kafka PartitionReassignmentReplicas 代码
文件路径：/metadata/src/main/java/org/apache/kafka/controller/PartitionReassignmentReplicas.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.controller;
import java.util.ArrayList;
import java.util.Set;
import java.util.List;
import java.util.Objects;
import java.util.TreeSet;
class PartitionReassignmentReplicas {
private final List<Integer> removing;
private final List<Integer> adding;
private final List<Integer> merged;
private static Set<Integer> calculateDifference(List<Integer> a, List<Integer> b) {
Set<Integer> result = new TreeSet<>(a);
result.removeAll(b);
return result;
}
PartitionReassignmentReplicas(List<Integer> currentReplicas,
List<Integer> targetReplicas) {
Set<Integer> removing = calculateDifference(currentReplicas, targetReplicas);
this.removing = new ArrayList<>(removing);
Set<Integer> adding = calculateDifference(targetReplicas, currentReplicas);
this.adding = new ArrayList<>(adding);
this.merged = new ArrayList<>(targetReplicas);
this.merged.addAll(removing);
}
List<Integer> removing() {
return removing;
}
List<Integer> adding() {
return adding;
}
List<Integer> merged() {
return merged;
}
@Override
public int hashCode() {
return Objects.hash(removing, adding, merged);
}
@Override
public boolean equals(Object o) {
if (!(o instanceof PartitionReassignmentReplicas)) return false;
PartitionReassignmentReplicas other = (PartitionReassignmentReplicas) o;
return removing.equals(other.removing) &&
adding.equals(other.adding) &&
merged.equals(other.merged);
}
@Override
public String toString() {
return "PartitionReassignmentReplicas(" +
"removing=" + removing + ", " +
"adding=" + adding + ", " +
"merged=" + merged + ")";
}
}
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