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A fork of the Apache Cassandra Project ready to embed Elasticsearch.
/*
* 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.streaming.messages;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;
import org.apache.cassandra.db.SerializationHeader;
import org.apache.cassandra.db.TypeSizes;
import org.apache.cassandra.io.compress.CompressionMetadata;
import org.apache.cassandra.io.sstable.format.SSTableFormat;
import org.apache.cassandra.io.util.DataInputPlus;
import org.apache.cassandra.io.util.DataOutputPlus;
import org.apache.cassandra.io.sstable.format.Version;
import org.apache.cassandra.net.MessagingService;
import org.apache.cassandra.streaming.compress.CompressionInfo;
import org.apache.cassandra.utils.Pair;
import org.apache.cassandra.utils.UUIDSerializer;
/**
* StreamingFileHeader is appended before sending actual data to describe what it's sending.
*/
public class FileMessageHeader
{
public static FileMessageHeaderSerializer serializer = new FileMessageHeaderSerializer();
public final UUID cfId;
public final int sequenceNumber;
/** SSTable version */
public final Version version;
/** SSTable format **/
public final SSTableFormat.Type format;
public final long estimatedKeys;
public final List> sections;
/**
* Compression info for SSTable to send. Can be null if SSTable is not compressed.
* On sender, this field is always null to avoid holding large number of Chunks.
* Use compressionMetadata instead.
*/
public final CompressionInfo compressionInfo;
private final CompressionMetadata compressionMetadata;
public final long repairedAt;
public final int sstableLevel;
public final SerializationHeader.Component header;
/* cached size value */
private transient final long size;
public FileMessageHeader(UUID cfId,
int sequenceNumber,
Version version,
SSTableFormat.Type format,
long estimatedKeys,
List> sections,
CompressionInfo compressionInfo,
long repairedAt,
int sstableLevel,
SerializationHeader.Component header)
{
this.cfId = cfId;
this.sequenceNumber = sequenceNumber;
this.version = version;
this.format = format;
this.estimatedKeys = estimatedKeys;
this.sections = sections;
this.compressionInfo = compressionInfo;
this.compressionMetadata = null;
this.repairedAt = repairedAt;
this.sstableLevel = sstableLevel;
this.header = header;
this.size = calculateSize();
}
public FileMessageHeader(UUID cfId,
int sequenceNumber,
Version version,
SSTableFormat.Type format,
long estimatedKeys,
List> sections,
CompressionMetadata compressionMetadata,
long repairedAt,
int sstableLevel,
SerializationHeader.Component header)
{
this.cfId = cfId;
this.sequenceNumber = sequenceNumber;
this.version = version;
this.format = format;
this.estimatedKeys = estimatedKeys;
this.sections = sections;
this.compressionInfo = null;
this.compressionMetadata = compressionMetadata;
this.repairedAt = repairedAt;
this.sstableLevel = sstableLevel;
this.header = header;
this.size = calculateSize();
}
public boolean isCompressed()
{
return compressionInfo != null || compressionMetadata != null;
}
/**
* @return total file size to transfer in bytes
*/
public long size()
{
return size;
}
private long calculateSize()
{
long transferSize = 0;
if (compressionInfo != null)
{
// calculate total length of transferring chunks
for (CompressionMetadata.Chunk chunk : compressionInfo.chunks)
transferSize += chunk.length + 4; // 4 bytes for CRC
}
else if (compressionMetadata != null)
{
transferSize = compressionMetadata.getTotalSizeForSections(sections);
}
else
{
for (Pair section : sections)
transferSize += section.right - section.left;
}
return transferSize;
}
@Override
public String toString()
{
final StringBuilder sb = new StringBuilder("Header (");
sb.append("cfId: ").append(cfId);
sb.append(", #").append(sequenceNumber);
sb.append(", version: ").append(version);
sb.append(", format: ").append(format);
sb.append(", estimated keys: ").append(estimatedKeys);
sb.append(", transfer size: ").append(size());
sb.append(", compressed?: ").append(isCompressed());
sb.append(", repairedAt: ").append(repairedAt);
sb.append(", level: ").append(sstableLevel);
sb.append(')');
return sb.toString();
}
@Override
public boolean equals(Object o)
{
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
FileMessageHeader that = (FileMessageHeader) o;
return sequenceNumber == that.sequenceNumber && cfId.equals(that.cfId);
}
@Override
public int hashCode()
{
int result = cfId.hashCode();
result = 31 * result + sequenceNumber;
return result;
}
static class FileMessageHeaderSerializer
{
public CompressionInfo serialize(FileMessageHeader header, DataOutputPlus out, int version) throws IOException
{
UUIDSerializer.serializer.serialize(header.cfId, out, version);
out.writeInt(header.sequenceNumber);
out.writeUTF(header.version.toString());
//We can't stream to a node that doesn't understand a new sstable format
if (version < StreamMessage.VERSION_22 && header.format != SSTableFormat.Type.LEGACY && header.format != SSTableFormat.Type.BIG)
throw new UnsupportedOperationException("Can't stream non-legacy sstables to nodes < 2.2");
if (version >= StreamMessage.VERSION_22)
out.writeUTF(header.format.name);
out.writeLong(header.estimatedKeys);
out.writeInt(header.sections.size());
for (Pair section : header.sections)
{
out.writeLong(section.left);
out.writeLong(section.right);
}
// construct CompressionInfo here to avoid holding large number of Chunks on heap.
CompressionInfo compressionInfo = null;
if (header.compressionMetadata != null)
compressionInfo = new CompressionInfo(header.compressionMetadata.getChunksForSections(header.sections), header.compressionMetadata.parameters);
CompressionInfo.serializer.serialize(compressionInfo, out, version);
out.writeLong(header.repairedAt);
out.writeInt(header.sstableLevel);
if (version >= StreamMessage.VERSION_30 && header.version.storeRows())
SerializationHeader.serializer.serialize(header.version, header.header, out);
return compressionInfo;
}
public FileMessageHeader deserialize(DataInputPlus in, int version) throws IOException
{
UUID cfId = UUIDSerializer.serializer.deserialize(in, MessagingService.current_version);
int sequenceNumber = in.readInt();
Version sstableVersion = SSTableFormat.Type.current().info.getVersion(in.readUTF());
SSTableFormat.Type format = SSTableFormat.Type.LEGACY;
if (version >= StreamMessage.VERSION_22)
format = SSTableFormat.Type.validate(in.readUTF());
long estimatedKeys = in.readLong();
int count = in.readInt();
List> sections = new ArrayList<>(count);
for (int k = 0; k < count; k++)
sections.add(Pair.create(in.readLong(), in.readLong()));
CompressionInfo compressionInfo = CompressionInfo.serializer.deserialize(in, MessagingService.current_version);
long repairedAt = in.readLong();
int sstableLevel = in.readInt();
SerializationHeader.Component header = version >= StreamMessage.VERSION_30 && sstableVersion.storeRows()
? SerializationHeader.serializer.deserialize(sstableVersion, in)
: null;
return new FileMessageHeader(cfId, sequenceNumber, sstableVersion, format, estimatedKeys, sections, compressionInfo, repairedAt, sstableLevel, header);
}
public long serializedSize(FileMessageHeader header, int version)
{
long size = UUIDSerializer.serializer.serializedSize(header.cfId, version);
size += TypeSizes.sizeof(header.sequenceNumber);
size += TypeSizes.sizeof(header.version.toString());
if (version >= StreamMessage.VERSION_22)
size += TypeSizes.sizeof(header.format.name);
size += TypeSizes.sizeof(header.estimatedKeys);
size += TypeSizes.sizeof(header.sections.size());
for (Pair section : header.sections)
{
size += TypeSizes.sizeof(section.left);
size += TypeSizes.sizeof(section.right);
}
size += CompressionInfo.serializer.serializedSize(header.compressionInfo, version);
size += TypeSizes.sizeof(header.sstableLevel);
if (version >= StreamMessage.VERSION_30)
size += SerializationHeader.serializer.serializedSize(header.version, header.header);
return size;
}
}
}