kafka Utils 源码
kafka Utils 代码
文件路径：/clients/src/main/java/org/apache/kafka/clients/consumer/internals/Utils.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.clients.consumer.internals;
import java.io.Serializable;
import java.util.Comparator;
import java.util.List;
import java.util.Map;
import org.apache.kafka.common.TopicPartition;
final class Utils {
final static class PartitionComparator implements Comparator<TopicPartition>, Serializable {
private static final long serialVersionUID = 1L;
private Map<String, List<String>> map;
PartitionComparator(Map<String, List<String>> map) {
this.map = map;
}
@Override
public int compare(TopicPartition o1, TopicPartition o2) {
int ret = map.get(o1.topic()).size() - map.get(o2.topic()).size();
if (ret == 0) {
ret = o1.topic().compareTo(o2.topic());
if (ret == 0)
ret = o1.partition() - o2.partition();
}
return ret;
}
}
final static class TopicPartitionComparator implements Comparator<TopicPartition>, Serializable {
private static final long serialVersionUID = 1L;
@Override
public int compare(TopicPartition topicPartition1, TopicPartition topicPartition2) {
String topic1 = topicPartition1.topic();
String topic2 = topicPartition2.topic();
if (topic1.equals(topic2)) {
return topicPartition1.partition() - topicPartition2.partition();
} else {
return topic1.compareTo(topic2);
}
}
}
}
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