org.elasticsearch.index.seqno.SeqNoStats Maven / Gradle / Ivy
/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
package org.elasticsearch.index.seqno;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.io.stream.Writeable;
import org.elasticsearch.xcontent.ToXContentFragment;
import org.elasticsearch.xcontent.XContentBuilder;
import java.io.IOException;
import java.util.Objects;
public class SeqNoStats implements ToXContentFragment, Writeable {
private static final String SEQ_NO = "seq_no";
private static final String MAX_SEQ_NO = "max_seq_no";
private static final String LOCAL_CHECKPOINT = "local_checkpoint";
private static final String GLOBAL_CHECKPOINT = "global_checkpoint";
private final long maxSeqNo;
private final long localCheckpoint;
private final long globalCheckpoint;
public SeqNoStats(long maxSeqNo, long localCheckpoint, long globalCheckpoint) {
assert localCheckpoint <= maxSeqNo : "local checkpoint [" + localCheckpoint + "] is above maximum seq no [" + maxSeqNo + "]";
// note that the global checkpoint can be higher from both maxSeqNo and localCheckpoint
// as we use this stats object to describe lucene commits as well as live statistic.
this.maxSeqNo = maxSeqNo;
this.localCheckpoint = localCheckpoint;
this.globalCheckpoint = globalCheckpoint;
}
public SeqNoStats(StreamInput in) throws IOException {
this(in.readZLong(), in.readZLong(), in.readZLong());
}
/** the maximum sequence number seen so far */
public long getMaxSeqNo() {
return maxSeqNo;
}
/** the maximum sequence number for which all previous operations (including) have been persisted */
public long getLocalCheckpoint() {
return localCheckpoint;
}
public long getGlobalCheckpoint() {
return globalCheckpoint;
}
@Override
public void writeTo(StreamOutput out) throws IOException {
out.writeZLong(maxSeqNo);
out.writeZLong(localCheckpoint);
out.writeZLong(globalCheckpoint);
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
builder.startObject(SEQ_NO);
builder.field(MAX_SEQ_NO, maxSeqNo);
builder.field(LOCAL_CHECKPOINT, localCheckpoint);
builder.field(GLOBAL_CHECKPOINT, globalCheckpoint);
builder.endObject();
return builder;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
final SeqNoStats that = (SeqNoStats) o;
return maxSeqNo == that.maxSeqNo && localCheckpoint == that.localCheckpoint && globalCheckpoint == that.globalCheckpoint;
}
@Override
public int hashCode() {
return Objects.hash(maxSeqNo, localCheckpoint, globalCheckpoint);
}
@Override
public String toString() {
return "SeqNoStats{"
+ "maxSeqNo="
+ maxSeqNo
+ ", localCheckpoint="
+ localCheckpoint
+ ", globalCheckpoint="
+ globalCheckpoint
+ '}';
}
}