| /* |
| * 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.file; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Optional; |
| import java.util.UUID; |
| |
| import org.apache.jackrabbit.oak.segment.RecordId; |
| import org.apache.jackrabbit.oak.segment.RecordType; |
| import org.apache.jackrabbit.oak.segment.SegmentId; |
| import org.apache.jackrabbit.oak.segment.SegmentNotFoundException; |
| import org.apache.jackrabbit.oak.segment.SegmentVersion; |
| import org.apache.jackrabbit.oak.segment.file.proc.Proc.Backend; |
| import org.apache.jackrabbit.oak.segment.spi.monitor.FileStoreMonitorAdapter; |
| import org.apache.jackrabbit.oak.segment.spi.monitor.IOMonitorAdapter; |
| import org.apache.jackrabbit.oak.segment.spi.persistence.SegmentArchiveEntry; |
| import org.apache.jackrabbit.oak.segment.spi.persistence.SegmentArchiveManager; |
| import org.apache.jackrabbit.oak.segment.spi.persistence.SegmentArchiveReader; |
| import org.apache.jackrabbit.oak.segment.spi.persistence.SegmentNodeStorePersistence; |
| import org.apache.jackrabbit.oak.spi.state.NodeState; |
| |
| class FileStoreProcBackend implements Backend { |
| |
| private final AbstractFileStore fileStore; |
| |
| private final SegmentNodeStorePersistence persistence; |
| |
| private final SegmentArchiveManager archiveManager; |
| |
| FileStoreProcBackend(AbstractFileStore fileStore, SegmentNodeStorePersistence persistence) throws IOException { |
| this.fileStore = fileStore; |
| this.persistence = persistence; |
| this.archiveManager = persistence.createArchiveManager(true, new IOMonitorAdapter(), new FileStoreMonitorAdapter()); |
| } |
| |
| @Override |
| public boolean tarExists(String name) { |
| try { |
| return archiveManager.listArchives().contains(name); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| @Override |
| public Optional<Long> getTarSize(String name) { |
| try (SegmentArchiveReader reader = archiveManager.open(name)) { |
| return Optional.ofNullable(reader).map(SegmentArchiveReader::length); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| @Override |
| public Iterable<String> getTarNames() { |
| try { |
| return archiveManager.listArchives(); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| @Override |
| public boolean segmentExists(String name, String segmentId) { |
| try (SegmentArchiveReader reader = archiveManager.open(name)) { |
| if (reader == null) { |
| return false; |
| } |
| return segmentExists(reader, UUID.fromString(segmentId)); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| private boolean segmentExists(SegmentArchiveReader reader, UUID id) { |
| return reader.containsSegment(id.getMostSignificantBits(), id.getLeastSignificantBits()); |
| } |
| |
| @Override |
| public Iterable<String> getSegmentIds(String name) { |
| try (SegmentArchiveReader reader = archiveManager.open(name)) { |
| if (reader == null) { |
| return Collections.emptyList(); |
| } |
| return getSegmentIds(reader); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| private Iterable<String> getSegmentIds(SegmentArchiveReader reader) { |
| List<String> ids = new ArrayList<>(); |
| for (SegmentArchiveEntry entry : reader.listSegments()) { |
| ids.add(new UUID(entry.getMsb(), entry.getLsb()).toString()); |
| } |
| return ids; |
| } |
| |
| private Optional<org.apache.jackrabbit.oak.segment.Segment> readSegment(String id) { |
| return readSegment(UUID.fromString(id)); |
| } |
| |
| private Optional<org.apache.jackrabbit.oak.segment.Segment> readSegment(UUID id) { |
| return readSegment(fileStore.getSegmentIdProvider().newSegmentId( |
| id.getMostSignificantBits(), |
| id.getLeastSignificantBits() |
| )); |
| } |
| |
| private Optional<org.apache.jackrabbit.oak.segment.Segment> readSegment(SegmentId id) { |
| try { |
| return Optional.of(fileStore.readSegment(id)); |
| } catch (SegmentNotFoundException e) { |
| return Optional.empty(); |
| } |
| } |
| |
| @Override |
| public Optional<Segment> getSegment(String id) { |
| return readSegment(id).map(segment -> new Segment() { |
| |
| @Override |
| public int getGeneration() { |
| return segment.getGcGeneration().getGeneration(); |
| } |
| |
| @Override |
| public int getFullGeneration() { |
| return segment.getGcGeneration().getFullGeneration(); |
| } |
| |
| @Override |
| public boolean isCompacted() { |
| return segment.getGcGeneration().isCompacted(); |
| } |
| |
| @Override |
| public int getLength() { |
| return segment.size(); |
| } |
| |
| @Override |
| public int getVersion() { |
| return SegmentVersion.asByte(segment.getSegmentVersion()); |
| } |
| |
| @Override |
| public boolean isDataSegment() { |
| return segment.getSegmentId().isDataSegmentId(); |
| } |
| |
| @Override |
| public Optional<String> getInfo() { |
| return Optional.ofNullable(segment.getSegmentInfo()); |
| } |
| |
| }); |
| } |
| |
| @Override |
| public Optional<InputStream> getSegmentData(String segmentId) { |
| return readSegment(segmentId).map(segment -> { |
| ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| |
| try { |
| segment.writeTo(out); |
| } catch (IOException e) { |
| return null; |
| } |
| |
| return new ByteArrayInputStream(out.toByteArray()); |
| }); |
| } |
| |
| @Override |
| public Optional<Iterable<String>> getSegmentReferences(String segmentId) { |
| return readSegment(segmentId).map(segment -> { |
| List<String> references = new ArrayList<>(segment.getReferencedSegmentIdCount()); |
| |
| for (int i = 0; i < segment.getReferencedSegmentIdCount(); i++) { |
| references.add(segment.getReferencedSegmentId(i).toString()); |
| } |
| |
| return references; |
| }); |
| } |
| |
| @Override |
| public Optional<Iterable<Record>> getSegmentRecords(String segmentId) { |
| return readSegment(segmentId).map(segment -> { |
| List<Record> records = new ArrayList<>(); |
| |
| segment.forEachRecord((number, type, offset) -> { |
| records.add(new Record() { |
| |
| @Override |
| public int getNumber() { |
| return number; |
| } |
| |
| @Override |
| public String getSegmentId() { |
| return segmentId; |
| } |
| |
| @Override |
| public int getOffset() { |
| return offset; |
| } |
| |
| @Override |
| public int getAddress() { |
| return segment.getAddress(offset); |
| } |
| |
| @Override |
| public String getType() { |
| return type.name(); |
| } |
| |
| @Override |
| public Optional<NodeState> getRoot() { |
| if (RecordType.NODE == type) { |
| RecordId id = new RecordId(segment.getSegmentId(), number); |
| return Optional.of(fileStore.getReader().readNode(id)); |
| } else { |
| return Optional.empty(); |
| } |
| } |
| }); |
| }); |
| |
| return records; |
| }); |
| } |
| |
| @Override |
| public boolean commitExists(String handle) { |
| long timestamp = Long.parseLong(handle); |
| |
| try (JournalReader reader = new JournalReader(persistence.getJournalFile())) { |
| for (JournalEntry entry : iterable(reader)) { |
| if (entry.getTimestamp() == timestamp) { |
| return true; |
| } |
| } |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| |
| return false; |
| } |
| |
| private <T> Iterable<T> iterable(Iterator<T> i) { |
| return () -> i; |
| } |
| |
| @Override |
| public Iterable<String> getCommitHandles() { |
| try (JournalReader reader = new JournalReader(persistence.getJournalFile())) { |
| List<String> handles = new ArrayList<>(); |
| for (JournalEntry entry : iterable(reader)) { |
| handles.add(Long.toString(entry.getTimestamp())); |
| } |
| return handles; |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| @Override |
| public Optional<Commit> getCommit(String handle) { |
| JournalEntry entry; |
| |
| try (JournalReader reader = new JournalReader(persistence.getJournalFile())) { |
| entry = getEntry(reader, Long.parseLong(handle)); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| |
| if (entry == null) { |
| return Optional.empty(); |
| } |
| |
| return Optional.of(new Commit() { |
| |
| @Override |
| public long getTimestamp() { |
| return entry.getTimestamp(); |
| } |
| |
| @Override |
| public String getRevision() { |
| return entry.getRevision(); |
| } |
| |
| @Override |
| public Optional<NodeState> getRoot() { |
| RecordId id = RecordId.fromString(fileStore.getSegmentIdProvider(), entry.getRevision()); |
| return Optional.of(fileStore.getReader().readNode(id)); |
| } |
| |
| }); |
| } |
| |
| private JournalEntry getEntry(JournalReader reader, long timestamp) { |
| for (JournalEntry entry : iterable(reader)) { |
| if (entry.getTimestamp() == timestamp) { |
| return entry; |
| } |
| } |
| return null; |
| } |
| |
| } |