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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.sstable;
import java.io.Closeable;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Collections;
import java.util.concurrent.atomic.AtomicReference;
import java.util.stream.Stream;
import org.apache.cassandra.config.DatabaseDescriptor;
import org.apache.cassandra.db.DecoratedKey;
import org.apache.cassandra.db.RegularAndStaticColumns;
import org.apache.cassandra.db.SerializationHeader;
import org.apache.cassandra.db.partitions.PartitionUpdate;
import org.apache.cassandra.db.rows.EncodingStats;
import org.apache.cassandra.io.sstable.format.SSTableFormat;
import org.apache.cassandra.io.util.File;
import org.apache.cassandra.schema.TableMetadataRef;
import org.apache.cassandra.service.ActiveRepairService;
/**
* Base class for the sstable writers used by CQLSSTableWriter.
*/
abstract class AbstractSSTableSimpleWriter implements Closeable
{
protected final File directory;
protected final TableMetadataRef metadata;
protected final RegularAndStaticColumns columns;
protected SSTableFormat<?, ?> format = DatabaseDescriptor.getSelectedSSTableFormat();
protected static final AtomicReference<SSTableId> id = new AtomicReference<>(SSTableIdFactory.instance.defaultBuilder().generator(Stream.empty()).get());
protected boolean makeRangeAware = false;
protected AbstractSSTableSimpleWriter(File directory, TableMetadataRef metadata, RegularAndStaticColumns columns)
{
this.metadata = metadata;
this.directory = directory;
this.columns = columns;
}
protected void setSSTableFormatType(SSTableFormat<?, ?> type)
{
this.format = type;
}
protected void setRangeAwareWriting(boolean makeRangeAware)
{
this.makeRangeAware = makeRangeAware;
}
protected SSTableTxnWriter createWriter(SSTable.Owner owner) throws IOException
{
SerializationHeader header = new SerializationHeader(true, metadata.get(), columns, EncodingStats.NO_STATS);
if (makeRangeAware)
return SSTableTxnWriter.createRangeAware(metadata, 0, ActiveRepairService.UNREPAIRED_SSTABLE, ActiveRepairService.NO_PENDING_REPAIR, false, format, 0, header);
return SSTableTxnWriter.create(metadata,
createDescriptor(directory, metadata.keyspace, metadata.name, format),
0,
ActiveRepairService.UNREPAIRED_SSTABLE,
ActiveRepairService.NO_PENDING_REPAIR,
false,
0,
header,
Collections.emptySet(),
owner);
}
private static Descriptor createDescriptor(File directory, final String keyspace, final String columnFamily, final SSTableFormat<?, ?> fmt) throws IOException
{
SSTableId nextGen = getNextId(directory, columnFamily);
return new Descriptor(directory, keyspace, columnFamily, nextGen, fmt);
}
private static SSTableId getNextId(File directory, final String columnFamily) throws IOException
{
while (true)
{
try (Stream<Path> existingPaths = Files.list(directory.toPath()))
{
Stream<SSTableId> existingIds = existingPaths.map(File::new)
.map(SSTable::tryDescriptorFromFile)
.filter(d -> d != null && d.cfname.equals(columnFamily))
.map(d -> d.id);
SSTableId lastId = id.get();
SSTableId newId = SSTableIdFactory.instance.defaultBuilder().generator(Stream.concat(existingIds, Stream.of(lastId))).get();
if (id.compareAndSet(lastId, newId))
return newId;
}
}
}
PartitionUpdate.Builder getUpdateFor(ByteBuffer key) throws IOException
{
return getUpdateFor(metadata.get().partitioner.decorateKey(key));
}
/**
* Returns a PartitionUpdate suitable to write on this writer for the provided key.
*
* @param key they partition key for which the returned update will be.
* @return an update on partition {@code key} that is tied to this writer.
*/
abstract PartitionUpdate.Builder getUpdateFor(DecoratedKey key) throws IOException;
}