kafka UnalignedFileRecords 源码

  • 2022-10-20
  • 浏览 (466)

kafka UnalignedFileRecords 代码

文件路径:/clients/src/main/java/org/apache/kafka/common/record/UnalignedFileRecords.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.common.record;

import org.apache.kafka.common.network.TransferableChannel;

import java.io.IOException;
import java.nio.channels.FileChannel;

/**
 * Represents a file record set which is not necessarily offset-aligned
 */
public class UnalignedFileRecords implements UnalignedRecords {

    private final FileChannel channel;
    private final long position;
    private final int size;

    public UnalignedFileRecords(FileChannel channel, long position, int size) {
        this.channel = channel;
        this.position = position;
        this.size = size;
    }

    @Override
    public int sizeInBytes() {
        return size;
    }

    @Override
    public long writeTo(TransferableChannel destChannel, long previouslyWritten, int remaining) throws IOException {
        long position = this.position + previouslyWritten;
        long count = Math.min(remaining, sizeInBytes() - previouslyWritten);
        return destChannel.transferFrom(channel, position, count);
    }
}

相关信息

kafka 源码目录

相关文章

kafka AbstractLegacyRecordBatch 源码

kafka AbstractRecordBatch 源码

kafka AbstractRecords 源码

kafka BaseRecords 源码

kafka ByteBufferLogInputStream 源码

kafka CompressionRatioEstimator 源码

kafka CompressionType 源码

kafka ControlRecordType 源码

kafka ControlRecordUtils 源码

kafka ConvertedRecords 源码

0  赞