| /* |
| * 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.File; |
| import java.io.FilenameFilter; |
| import java.io.IOException; |
| import java.io.Closeable; |
| import java.nio.ByteBuffer; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Set; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import org.apache.cassandra.config.CFMetaData; |
| import org.apache.cassandra.db.*; |
| import org.apache.cassandra.db.rows.EncodingStats; |
| import org.apache.cassandra.db.partitions.PartitionUpdate; |
| import org.apache.cassandra.io.sstable.format.SSTableFormat; |
| import org.apache.cassandra.service.ActiveRepairService; |
| import org.apache.cassandra.utils.Pair; |
| |
| /** |
| * Base class for the sstable writers used by CQLSSTableWriter. |
| */ |
| abstract class AbstractSSTableSimpleWriter implements Closeable |
| { |
| protected final File directory; |
| protected final CFMetaData metadata; |
| protected final PartitionColumns columns; |
| protected SSTableFormat.Type formatType = SSTableFormat.Type.current(); |
| protected static AtomicInteger generation = new AtomicInteger(0); |
| protected boolean makeRangeAware = false; |
| |
| protected AbstractSSTableSimpleWriter(File directory, CFMetaData metadata, PartitionColumns columns) |
| { |
| this.metadata = metadata; |
| this.directory = directory; |
| this.columns = columns; |
| } |
| |
| protected void setSSTableFormatType(SSTableFormat.Type type) |
| { |
| this.formatType = type; |
| } |
| |
| protected void setRangeAwareWriting(boolean makeRangeAware) |
| { |
| this.makeRangeAware = makeRangeAware; |
| } |
| |
| |
| protected SSTableTxnWriter createWriter() |
| { |
| SerializationHeader header = new SerializationHeader(true, metadata, columns, EncodingStats.NO_STATS); |
| |
| if (makeRangeAware) |
| return SSTableTxnWriter.createRangeAware(metadata, 0, ActiveRepairService.UNREPAIRED_SSTABLE, formatType, 0, header); |
| |
| return SSTableTxnWriter.create(metadata, |
| createDescriptor(directory, metadata.ksName, metadata.cfName, formatType), |
| 0, |
| ActiveRepairService.UNREPAIRED_SSTABLE, |
| 0, |
| header, |
| Collections.emptySet()); |
| } |
| |
| private static Descriptor createDescriptor(File directory, final String keyspace, final String columnFamily, final SSTableFormat.Type fmt) |
| { |
| int maxGen = getNextGeneration(directory, columnFamily); |
| return new Descriptor(directory, keyspace, columnFamily, maxGen + 1, fmt); |
| } |
| |
| private static int getNextGeneration(File directory, final String columnFamily) |
| { |
| final Set<Descriptor> existing = new HashSet<>(); |
| directory.list(new FilenameFilter() |
| { |
| public boolean accept(File dir, String name) |
| { |
| Pair<Descriptor, Component> p = SSTable.tryComponentFromFilename(dir, name); |
| Descriptor desc = p == null ? null : p.left; |
| if (desc == null) |
| return false; |
| |
| if (desc.cfname.equals(columnFamily)) |
| existing.add(desc); |
| |
| return false; |
| } |
| }); |
| int maxGen = generation.getAndIncrement(); |
| for (Descriptor desc : existing) |
| { |
| while (desc.generation > maxGen) |
| { |
| maxGen = generation.getAndIncrement(); |
| } |
| } |
| return maxGen; |
| } |
| |
| PartitionUpdate getUpdateFor(ByteBuffer key) throws IOException |
| { |
| return getUpdateFor(metadata.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 getUpdateFor(DecoratedKey key) throws IOException; |
| } |
| |