| /* |
| * 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.format; |
| |
| import java.io.IOException; |
| import java.util.Arrays; |
| import java.util.EnumSet; |
| import java.util.Map; |
| |
| import com.google.common.collect.ImmutableMap; |
| |
| import org.apache.cassandra.db.SerializationHeader; |
| import org.apache.cassandra.exceptions.UnknownColumnException; |
| import org.apache.cassandra.io.FSWriteError; |
| import org.apache.cassandra.io.sstable.CorruptSSTableException; |
| import org.apache.cassandra.io.sstable.Descriptor; |
| import org.apache.cassandra.io.sstable.format.SSTableFormat.Components; |
| import org.apache.cassandra.io.sstable.metadata.CompactionMetadata; |
| import org.apache.cassandra.io.sstable.metadata.MetadataComponent; |
| import org.apache.cassandra.io.sstable.metadata.MetadataType; |
| import org.apache.cassandra.io.sstable.metadata.StatsMetadata; |
| import org.apache.cassandra.io.sstable.metadata.ValidationMetadata; |
| import org.apache.cassandra.io.util.File; |
| import org.apache.cassandra.io.util.SequentialWriter; |
| import org.apache.cassandra.io.util.SequentialWriterOption; |
| import org.apache.cassandra.schema.TableMetadata; |
| |
| public class StatsComponent |
| { |
| public final Map<MetadataType, MetadataComponent> metadata; |
| |
| public StatsComponent(Map<MetadataType, MetadataComponent> metadata) |
| { |
| this.metadata = ImmutableMap.copyOf(metadata); |
| } |
| |
| public static StatsComponent load(Descriptor descriptor) throws IOException |
| { |
| return load(descriptor, MetadataType.values()); |
| } |
| |
| public static StatsComponent load(Descriptor descriptor, MetadataType... types) throws IOException |
| { |
| Map<MetadataType, MetadataComponent> metadata; |
| try |
| { |
| metadata = descriptor.getMetadataSerializer().deserialize(descriptor, EnumSet.copyOf(Arrays.asList(types))); |
| } |
| catch (IOException e) |
| { |
| throw new CorruptSSTableException(e, descriptor.fileFor(Components.STATS)); |
| } |
| |
| return new StatsComponent(metadata); |
| } |
| |
| public SerializationHeader.Component serializationHeader() |
| { |
| return (SerializationHeader.Component) metadata.get(MetadataType.HEADER); |
| } |
| |
| public SerializationHeader serializationHeader(TableMetadata metadata) |
| { |
| SerializationHeader.Component header = serializationHeader(); |
| if (header != null) |
| { |
| try |
| { |
| return header.toHeader(metadata); |
| } |
| catch (UnknownColumnException ex) |
| { |
| throw new IllegalArgumentException(ex); |
| } |
| } |
| |
| return null; |
| } |
| |
| public CompactionMetadata compactionMetadata() |
| { |
| return (CompactionMetadata) metadata.get(MetadataType.COMPACTION); |
| } |
| |
| public ValidationMetadata validationMetadata() |
| { |
| return (ValidationMetadata) metadata.get(MetadataType.VALIDATION); |
| } |
| |
| public StatsMetadata statsMetadata() |
| { |
| return (StatsMetadata) metadata.get(MetadataType.STATS); |
| } |
| |
| public void save(Descriptor desc) |
| { |
| File file = desc.fileFor(Components.STATS); |
| try (SequentialWriter out = new SequentialWriter(file, SequentialWriterOption.DEFAULT)) |
| { |
| desc.getMetadataSerializer().serialize(metadata, out, desc.version); |
| out.finish(); |
| } |
| catch (IOException e) |
| { |
| throw new FSWriteError(e, file.path()); |
| } |
| } |
| |
| } |