| /* |
| * 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.jackrabbit.oak.segment.aws; |
| |
| import static org.apache.jackrabbit.oak.segment.remote.RemoteUtilities.OFF_HEAP; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.UUID; |
| |
| import org.apache.jackrabbit.oak.commons.Buffer; |
| import org.apache.jackrabbit.oak.segment.remote.AbstractRemoteSegmentArchiveReader; |
| import org.apache.jackrabbit.oak.segment.remote.RemoteSegmentArchiveEntry; |
| import org.apache.jackrabbit.oak.segment.spi.monitor.IOMonitor; |
| |
| public class AwsSegmentArchiveReader extends AbstractRemoteSegmentArchiveReader { |
| |
| private final S3Directory directory; |
| |
| private final String archiveName; |
| |
| private final long length; |
| |
| AwsSegmentArchiveReader(S3Directory directory, String archiveName, IOMonitor ioMonitor) throws IOException { |
| super(ioMonitor); |
| this.directory = directory; |
| this.archiveName = archiveName; |
| this.length = computeArchiveIndexAndLength(); |
| } |
| |
| @Override |
| public long length() { |
| return length; |
| } |
| |
| @Override |
| public String getName() { |
| return archiveName; |
| } |
| |
| @Override |
| protected long computeArchiveIndexAndLength() throws IOException { |
| long length = 0; |
| Buffer buffer = directory.readObjectToBuffer(archiveName + ".idx", OFF_HEAP); |
| while (buffer.hasRemaining()) { |
| long msb = buffer.getLong(); |
| long lsb = buffer.getLong(); |
| int position = buffer.getInt(); |
| int contentLength = buffer.getInt(); |
| int generation = buffer.getInt(); |
| int fullGeneration = buffer.getInt(); |
| boolean compacted = buffer.get() != 0; |
| |
| RemoteSegmentArchiveEntry indexEntry = new RemoteSegmentArchiveEntry(msb, lsb, position, contentLength, |
| generation, fullGeneration, compacted); |
| index.put(new UUID(indexEntry.getMsb(), indexEntry.getLsb()), indexEntry); |
| length += contentLength; |
| } |
| |
| return length; |
| } |
| |
| @Override |
| protected void doReadSegmentToBuffer(String segmentFileName, Buffer buffer) throws IOException { |
| directory.readObjectToBuffer(segmentFileName, buffer); |
| } |
| |
| @Override |
| protected Buffer doReadDataFile(String extension) throws IOException { |
| return readObjectToBuffer(getName() + extension); |
| } |
| |
| @Override |
| protected File archivePathAsFile() { |
| return new File(directory.getPath()); |
| } |
| |
| private Buffer readObjectToBuffer(String name) throws IOException { |
| if (directory.doesObjectExist(name)) { |
| return directory.readObjectToBuffer(name, false); |
| } |
| |
| return null; |
| } |
| } |