kafka LogSegmentData 源码
kafka LogSegmentData 代码
文件路径:/storage/api/src/main/java/org/apache/kafka/server/log/remote/storage/LogSegmentData.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.server.log.remote.storage;
import org.apache.kafka.common.annotation.InterfaceStability;
import java.nio.ByteBuffer;
import java.nio.file.Path;
import java.util.Objects;
import java.util.Optional;
/**
* This represents all the required data and indexes for a specific log segment that needs to be stored in the remote
* storage. This is passed with {@link RemoteStorageManager#copyLogSegmentData(RemoteLogSegmentMetadata, LogSegmentData)}
* while copying a specific log segment to the remote storage.
*/
@InterfaceStability.Evolving
public class LogSegmentData {
private final Path logSegment;
private final Path offsetIndex;
private final Path timeIndex;
private final Optional<Path> transactionIndex;
private final Path producerSnapshotIndex;
private final ByteBuffer leaderEpochIndex;
/**
* Creates a LogSegmentData instance with data and indexes.
*
* @param logSegment actual log segment file
* @param offsetIndex offset index file
* @param timeIndex time index file
* @param transactionIndex transaction index file, which can be null
* @param producerSnapshotIndex producer snapshot until this segment
* @param leaderEpochIndex leader-epoch-index until this segment
*/
public LogSegmentData(Path logSegment,
Path offsetIndex,
Path timeIndex,
Optional<Path> transactionIndex,
Path producerSnapshotIndex,
ByteBuffer leaderEpochIndex) {
this.logSegment = Objects.requireNonNull(logSegment, "logSegment can not be null");
this.offsetIndex = Objects.requireNonNull(offsetIndex, "offsetIndex can not be null");
this.timeIndex = Objects.requireNonNull(timeIndex, "timeIndex can not be null");
this.transactionIndex = Objects.requireNonNull(transactionIndex, "transactionIndex can not be null");
this.producerSnapshotIndex = Objects.requireNonNull(producerSnapshotIndex, "producerSnapshotIndex can not be null");
this.leaderEpochIndex = Objects.requireNonNull(leaderEpochIndex, "leaderEpochIndex can not be null");
}
/**
* @return Log segment file of this segment.
*/
public Path logSegment() {
return logSegment;
}
/**
* @return Offset index file.
*/
public Path offsetIndex() {
return offsetIndex;
}
/**
* @return Time index file of this segment.
*/
public Path timeIndex() {
return timeIndex;
}
/**
* @return Transaction index file of this segment if it exists.
*/
public Optional<Path> transactionIndex() {
return transactionIndex;
}
/**
* @return Producer snapshot file until this segment.
*/
public Path producerSnapshotIndex() {
return producerSnapshotIndex;
}
/**
* @return Leader epoch index until this segment.
*/
public ByteBuffer leaderEpochIndex() {
return leaderEpochIndex;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
LogSegmentData that = (LogSegmentData) o;
return Objects.equals(logSegment, that.logSegment) &&
Objects.equals(offsetIndex, that.offsetIndex) &&
Objects.equals(timeIndex, that.timeIndex) &&
Objects.equals(transactionIndex, that.transactionIndex) &&
Objects.equals(producerSnapshotIndex, that.producerSnapshotIndex) &&
Objects.equals(leaderEpochIndex, that.leaderEpochIndex);
}
@Override
public int hashCode() {
return Objects.hash(logSegment, offsetIndex, timeIndex, transactionIndex, producerSnapshotIndex, leaderEpochIndex);
}
@Override
public String toString() {
return "LogSegmentData{" +
"logSegment=" + logSegment +
", offsetIndex=" + offsetIndex +
", timeIndex=" + timeIndex +
", txnIndex=" + transactionIndex +
", producerSnapshotIndex=" + producerSnapshotIndex +
", leaderEpochIndex=" + leaderEpochIndex +
'}';
}
}
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