kafka RawSnapshotReader 源码
kafka RawSnapshotReader 代码
文件路径：/raft/src/main/java/org/apache/kafka/snapshot/RawSnapshotReader.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.snapshot;
import org.apache.kafka.common.record.Records;
import org.apache.kafka.common.record.UnalignedRecords;
import org.apache.kafka.raft.OffsetAndEpoch;
/**
* Interface for reading snapshots as a sequence of records.
*/
public interface RawSnapshotReader {
/**
* Returns the end offset and epoch for the snapshot.
*/
OffsetAndEpoch snapshotId();
/**
* Returns the number of bytes for the snapshot.
*/
long sizeInBytes();
/**
* Creates a slize of unaligned records from the position up to a size.
*
* @param position the starting position of the slice in the snapshot
* @param size the maximum size of the slice
* @return an unaligned slice of records in the snapshot
*/
UnalignedRecords slice(long position, int size);
/**
* Returns all of the records backing this snapshot reader.
*
* @return all of the records for this snapshot
*/
Records records();
}
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