org.apache.kafka.common.TopicPartition Maven / Gradle / Ivy
/*
* 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.io.Serializable;
import java.util.Objects;
/**
* A topic name and partition number
*/
public final class TopicPartition implements Serializable {
private static final long serialVersionUID = -613627415771699627L;
private int hash = 0;
private final int partition;
private final String topic;
public TopicPartition(String topic, int partition) {
this.partition = partition;
this.topic = topic;
}
public int partition() {
return partition;
}
public String topic() {
return topic;
}
@Override
public int hashCode() {
if (hash != 0)
return hash;
final int prime = 31;
int result = 1;
result = prime * result + partition;
result = prime * result + Objects.hashCode(topic);
this.hash = result;
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
TopicPartition other = (TopicPartition) obj;
return partition == other.partition && Objects.equals(topic, other.topic);
}
@Override
public String toString() {
return topic + "-" + partition;
}
}