/*
* 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 com.google.common.util.concurrent.RateLimiter;
import org.apache.cassandra.io.compress.CompressedRandomAccessReader;
import org.apache.cassandra.io.compress.CompressedSequentialWriter;
import org.apache.cassandra.io.compress.CompressedThrottledReader;
import org.apache.cassandra.io.compress.CompressionMetadata;
public class CompressedPoolingSegmentedFile extends PoolingSegmentedFile implements ICompressedFile
{
public final CompressionMetadata metadata;
public CompressedPoolingSegmentedFile(String path, CompressionMetadata metadata)
{
super(new Cleanup(path, metadata), path, metadata.dataLength, metadata.compressedFileLength);
this.metadata = metadata;
}
private CompressedPoolingSegmentedFile(CompressedPoolingSegmentedFile copy)
{
super(copy);
this.metadata = copy.metadata;
}
protected static final class Cleanup extends PoolingSegmentedFile.Cleanup
{
final CompressionMetadata metadata;
protected Cleanup(String path, CompressionMetadata metadata)
{
super(path);
this.metadata = metadata;
}
public void tidy() throws Exception
{
super.tidy();
metadata.close();
}
}
public static class Builder extends CompressedSegmentedFile.Builder
{
public Builder(CompressedSequentialWriter writer)
{
super(writer);
}
public void addPotentialBoundary(long boundary)
{
// only one segment in a standard-io file
}
public SegmentedFile complete(String path, long overrideLength, boolean isFinal)
{
return new CompressedPoolingSegmentedFile(path, metadata(path, overrideLength, isFinal));
}
}
public void dropPageCache(long before)
{
if (before >= metadata.dataLength)
super.dropPageCache(0);
super.dropPageCache(metadata.chunkFor(before).offset);
}
public RandomAccessReader createReader()
{
return CompressedRandomAccessReader.open(path, metadata, null);
}
public RandomAccessReader createThrottledReader(RateLimiter limiter)
{
return CompressedThrottledReader.open(path, metadata, limiter);
}
protected RandomAccessReader createPooledReader()
{
return CompressedRandomAccessReader.open(path, metadata, this);
}
public CompressionMetadata getMetadata()
{
return metadata;
}
public CompressedPoolingSegmentedFile sharedCopy()
{
return new CompressedPoolingSegmentedFile(this);
}
}