
com.alipay.sofa.jraft.entity.LogId 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 com.alipay.sofa.jraft.entity;
import java.io.Serializable;
import com.alipay.sofa.jraft.util.Bits;
import com.alipay.sofa.jraft.util.Copiable;
import com.alipay.sofa.jraft.util.CrcUtil;
/**
* Log identifier.
*
* @author boyan ([email protected])
*
* 2018-Mar-12 3:12:29 PM
*/
public class LogId implements Comparable, Copiable, Serializable, Checksum {
private static final long serialVersionUID = -6680425579347357313L;
private long index;
private long term;
@Override
public LogId copy() {
return new LogId(this.index, this.term);
}
@Override
public long checksum() {
byte[] bs = new byte[16];
Bits.putLong(bs, 0, this.index);
Bits.putLong(bs, 8, this.term);
return CrcUtil.crc64(bs);
}
public LogId() {
this(0, 0);
}
public LogId(final long index, final long term) {
super();
setIndex(index);
setTerm(term);
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + (int) (this.index ^ (this.index >>> 32));
result = prime * result + (int) (this.term ^ (this.term >>> 32));
return result;
}
@Override
public boolean equals(final Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
final LogId other = (LogId) obj;
if (this.index != other.index) {
return false;
}
// noinspection RedundantIfStatement
if (this.term != other.term) {
return false;
}
return true;
}
@Override
public int compareTo(final LogId o) {
// Compare term at first
final int c = Long.compare(getTerm(), o.getTerm());
if (c == 0) {
return Long.compare(getIndex(), o.getIndex());
} else {
return c;
}
}
public long getTerm() {
return this.term;
}
public void setTerm(final long term) {
this.term = term;
}
public long getIndex() {
return this.index;
}
public void setIndex(final long index) {
this.index = index;
}
@Override
public String toString() {
return "LogId [index=" + this.index + ", term=" + this.term + "]";
}
}
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