kafka TopicIdPartition 源码
kafka TopicIdPartition 代码
文件路径:/clients/src/main/java/org/apache/kafka/common/TopicIdPartition.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;
import java.util.Objects;
/**
* This represents universally unique identifier with topic id for a topic partition. This makes sure that topics
* recreated with the same name will always have unique topic identifiers.
*/
public class TopicIdPartition {
private final Uuid topicId;
private final TopicPartition topicPartition;
/**
* Create an instance with the provided parameters.
*
* @param topicId the topic id
* @param topicPartition the topic partition
*/
public TopicIdPartition(Uuid topicId, TopicPartition topicPartition) {
this.topicId = Objects.requireNonNull(topicId, "topicId can not be null");
this.topicPartition = Objects.requireNonNull(topicPartition, "topicPartition can not be null");
}
/**
* Create an instance with the provided parameters.
*
* @param topicId the topic id
* @param partition the partition id
* @param topic the topic name or null
*/
public TopicIdPartition(Uuid topicId, int partition, String topic) {
this.topicId = Objects.requireNonNull(topicId, "topicId can not be null");
this.topicPartition = new TopicPartition(topic, partition);
}
/**
* @return Universally unique id representing this topic partition.
*/
public Uuid topicId() {
return topicId;
}
/**
* @return the topic name or null if it is unknown.
*/
public String topic() {
return topicPartition.topic();
}
/**
* @return the partition id.
*/
public int partition() {
return topicPartition.partition();
}
/**
* @return Topic partition representing this instance.
*/
public TopicPartition topicPartition() {
return topicPartition;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
TopicIdPartition that = (TopicIdPartition) o;
return topicId.equals(that.topicId) &&
topicPartition.equals(that.topicPartition);
}
@Override
public int hashCode() {
final int prime = 31;
int result = prime + topicId.hashCode();
result = prime * result + topicPartition.hashCode();
return result;
}
@Override
public String toString() {
return topicId + ":" + topic() + "-" + partition();
}
}
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