| /* |
| * 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.plugins.version; |
| |
| import org.apache.jackrabbit.oak.api.CommitFailedException; |
| import org.apache.jackrabbit.oak.spi.commit.CommitInfo; |
| import org.apache.jackrabbit.oak.spi.commit.DefaultEditor; |
| import org.apache.jackrabbit.oak.spi.commit.Editor; |
| import org.apache.jackrabbit.oak.spi.commit.EditorProvider; |
| import org.apache.jackrabbit.oak.spi.state.NodeBuilder; |
| import org.apache.jackrabbit.oak.spi.state.NodeState; |
| |
| import java.util.Set; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| import static org.apache.jackrabbit.JcrConstants.JCR_SYSTEM; |
| import static org.apache.jackrabbit.JcrConstants.JCR_VERSIONSTORAGE; |
| |
| /** |
| * This editor removes empty version histories for nodes that are no longer versionable |
| * (eg. because were deleted). The class won't remove histories for nodes which |
| * UUIDs are present in the {@link OrphanedVersionCleaner#existingVersionables}. |
| * The set should be used to skip processing moved/renamed nodes and it can be |
| * filled by the related {@link VersionableCollector} editor. |
| */ |
| class OrphanedVersionCleaner extends DefaultEditor { |
| |
| private final ReadWriteVersionManager vMgr; |
| |
| private final Set<String> existingVersionables; |
| |
| OrphanedVersionCleaner(ReadWriteVersionManager vMgr, Set<String> existingVersionables) { |
| this.vMgr = vMgr; |
| this.existingVersionables = existingVersionables; |
| } |
| |
| @Override |
| public void leave(NodeState before, NodeState after) throws CommitFailedException { |
| if (vMgr.isVersionable(before) && !vMgr.isVersionable(after)) { |
| String versionableUuid = Utils.uuidFromNode(before); |
| if (!existingVersionables.contains(versionableUuid)) { |
| vMgr.removeEmptyHistory(before); |
| } |
| } |
| } |
| |
| @Override |
| public Editor childNodeAdded(String name, NodeState after) throws CommitFailedException { |
| return this; |
| } |
| |
| @Override |
| public Editor childNodeChanged(String name, NodeState before, NodeState after) throws CommitFailedException { |
| return this; |
| } |
| |
| @Override |
| public Editor childNodeDeleted(String name, NodeState before) throws CommitFailedException { |
| return this; |
| } |
| |
| static class Provider implements EditorProvider { |
| |
| private final Set<String> existingVersionables; |
| |
| Provider(Set<String> existingVersionables) { |
| this.existingVersionables = existingVersionables; |
| } |
| |
| @Override |
| public Editor getRootEditor(NodeState before, NodeState after, NodeBuilder builder, CommitInfo info) throws CommitFailedException { |
| if (!builder.hasChildNode(JCR_SYSTEM)) { |
| return null; |
| } |
| NodeBuilder system = builder.child(JCR_SYSTEM); |
| if (!system.hasChildNode(JCR_VERSIONSTORAGE)) { |
| return null; |
| } |
| NodeBuilder versionStorage = system.child(JCR_VERSIONSTORAGE); |
| ReadWriteVersionManager vMgr = new ReadWriteVersionManager(versionStorage, builder); |
| return new OrphanedVersionCleaner(vMgr, existingVersionables); |
| } |
| |
| } |
| } |