| /* |
| * 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 com.google.common.base.Function; |
| import org.apache.jackrabbit.oak.api.CommitFailedException; |
| import org.apache.jackrabbit.oak.spi.commit.CommitHook; |
| import org.apache.jackrabbit.oak.spi.commit.CommitInfo; |
| import org.apache.jackrabbit.oak.spi.commit.EditorHook; |
| import org.apache.jackrabbit.oak.spi.commit.EditorProvider; |
| import org.apache.jackrabbit.oak.spi.state.NodeState; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| import org.osgi.service.component.annotations.Component; |
| |
| import java.util.List; |
| import java.util.Set; |
| import static com.google.common.collect.Collections2.transform; |
| import static com.google.common.collect.Lists.newArrayList; |
| import static com.google.common.collect.Sets.newHashSet; |
| import static org.apache.jackrabbit.oak.spi.commit.CompositeHook.compose; |
| |
| /** |
| * This class gathers together editors related to handling version storage: |
| * <ol> |
| * <li> |
| * {@link VersionEditorProvider} |
| * <ul> |
| * <li> |
| * {@link VersionEditor} - creates version history, handles |
| * checking-in, checking-out and restoring, prevents a |
| * checked-in node from being modified, |
| * </li> |
| * <li> |
| * {@link VersionStorageEditor} - validates changes on the |
| * version storage, |
| * </li> |
| * </ul> |
| * </li> |
| * <li> |
| * {@link VersionableCollector} - collects all existing versionable |
| * UUIDs, so assigned histories won't be removed in the next step, |
| * </li> |
| * <li> |
| * {@link OrphanedVersionCleaner} - removes all histories that are |
| * empty and have no longer a parent versionable node. |
| * </li> |
| * </ol> |
| * |
| */ |
| @Component(service = CommitHook.class) |
| public class VersionHook implements CommitHook { |
| |
| @NotNull |
| @Override |
| public NodeState processCommit(NodeState before, NodeState after, CommitInfo info) throws CommitFailedException { |
| Set<String> existingVersionables = newHashSet(); |
| |
| List<EditorProvider> providers = newArrayList(); |
| providers.add(new VersionEditorProvider()); |
| providers.add(new VersionableCollector.Provider(existingVersionables)); |
| providers.add(new OrphanedVersionCleaner.Provider(existingVersionables)); |
| |
| return compose(transform(providers, new Function<EditorProvider, CommitHook>() { |
| @Nullable |
| @Override |
| public CommitHook apply(@Nullable EditorProvider input) { |
| return new EditorHook(input); |
| } |
| })).processCommit(before, after, info); |
| } |
| } |