| /* |
| * 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.standby.server; |
| |
| import static com.google.common.collect.Lists.newArrayList; |
| |
| import java.util.List; |
| import java.util.UUID; |
| |
| import org.apache.jackrabbit.oak.segment.Segment; |
| import org.apache.jackrabbit.oak.segment.SegmentId; |
| import org.apache.jackrabbit.oak.segment.file.FileStore; |
| |
| class DefaultStandbyReferencesReader implements StandbyReferencesReader { |
| |
| private final FileStore store; |
| |
| DefaultStandbyReferencesReader(FileStore store) { |
| this.store = store; |
| } |
| |
| @Override |
| public Iterable<String> readReferences(String id) { |
| UUID uuid = UUID.fromString(id); |
| |
| long msb = uuid.getMostSignificantBits(); |
| long lsb = uuid.getLeastSignificantBits(); |
| SegmentId segmentId = store.getSegmentIdProvider().newSegmentId(msb, lsb); |
| |
| if (store.containsSegment(segmentId)) { |
| Segment segment = store.readSegment(segmentId); |
| |
| List<String> references = newArrayList(); |
| |
| for (int i = 0; i < segment.getReferencedSegmentIdCount(); i++) { |
| references.add(segment.getReferencedSegmentId(i).toString()); |
| } |
| |
| return references; |
| } |
| |
| return null; |
| } |
| |
| } |