org.apache.cassandra.io.util.SimpleChunkReader Maven / Gradle / Ivy
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* 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.cassandra.io.util;
import java.nio.ByteBuffer;
import org.apache.cassandra.io.compress.BufferType;
class SimpleChunkReader extends AbstractReaderFileProxy implements ChunkReader
{
private final int bufferSize;
private final BufferType bufferType;
SimpleChunkReader(ChannelProxy channel, long fileLength, BufferType bufferType, int bufferSize)
{
super(channel, fileLength);
this.bufferSize = bufferSize;
this.bufferType = bufferType;
}
@Override
public void readChunk(long position, ByteBuffer buffer)
{
buffer.clear();
channel.read(buffer, position);
buffer.flip();
}
@Override
public int chunkSize()
{
return bufferSize;
}
@Override
public BufferType preferredBufferType()
{
return bufferType;
}
@Override
public Rebufferer instantiateRebufferer()
{
return new BufferManagingRebufferer.Unaligned(this);
}
@Override
public String toString()
{
return String.format("%s(%s - chunk length %d, data length %d)",
getClass().getSimpleName(),
channel.filePath(),
bufferSize,
fileLength());
}
}