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/*
* 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.migration.version;
import org.apache.jackrabbit.oak.api.CommitFailedException;
import org.apache.jackrabbit.oak.api.Type;
import org.apache.jackrabbit.oak.commons.PathUtils;
import org.apache.jackrabbit.oak.plugins.nodetype.TypePredicate;
import org.apache.jackrabbit.oak.plugins.version.ReadWriteVersionManager;
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 org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Collections;
import java.util.Set;
import static com.google.common.collect.ImmutableSet.of;
import static org.apache.jackrabbit.JcrConstants.JCR_UUID;
import static org.apache.jackrabbit.JcrConstants.MIX_REFERENCEABLE;
import static org.apache.jackrabbit.JcrConstants.MIX_VERSIONABLE;
import static org.apache.jackrabbit.oak.spi.version.VersionConstants.MIX_REP_VERSIONABLE_PATHS;
import static org.apache.jackrabbit.oak.plugins.migration.version.VersionHistoryUtil.addMixin;
import static org.apache.jackrabbit.oak.plugins.migration.version.VersionHistoryUtil.getVersionHistoryBuilder;
import static org.apache.jackrabbit.oak.plugins.migration.version.VersionHistoryUtil.getVersionStorage;
import static org.apache.jackrabbit.oak.plugins.migration.version.VersionHistoryUtil.removeVersionProperties;
/**
* The VersionableEditor provides two possible ways to handle
* versionable nodes:
*
*
it can copy the version histories of versionable nodes, or
*
* it can skip copying version histories and remove the
* {@code mix:versionable} mixin together with any related
* properties (see {@link VersionHistoryUtil#removeVersionProperties(NodeBuilder, TypePredicate)}).
*
*
*/
public class VersionableEditor extends DefaultEditor {
private static final Logger logger = LoggerFactory.getLogger(VersionableEditor.class);
private static final Set SKIPPED_PATHS = of("/oak:index", "/jcr:system/jcr:versionStorage");
private final Provider provider;
private final NodeBuilder rootBuilder;
private final NodeBuilder versionStorage;
private final TypePredicate isReferenceable;
private final TypePredicate isVersionable;
private final VersionCopier versionCopier;
private final ReadWriteVersionManager vMgr;
private String path;
private VersionableEditor(Provider provider, NodeBuilder rootBuilder) {
this.rootBuilder = rootBuilder;
this.versionStorage = getVersionStorage(rootBuilder);
this.vMgr = new ReadWriteVersionManager(versionStorage, rootBuilder);
this.provider = provider;
this.isVersionable = new TypePredicate(rootBuilder.getNodeState(), MIX_VERSIONABLE);
this.isReferenceable = new TypePredicate(rootBuilder.getNodeState(), MIX_REFERENCEABLE);
this.versionCopier = new VersionCopier(rootBuilder, getVersionStorage(provider.sourceRoot), versionStorage);
this.path = "/";
}
public static class Provider implements EditorProvider {
private final NodeState sourceRoot;
private final String workspaceName;
private final VersionCopyConfiguration config;
public Provider(NodeState sourceRoot, String workspaceName, VersionCopyConfiguration config) {
this.sourceRoot = sourceRoot;
this.workspaceName = workspaceName;
this.config = config;
}
@Override
public Editor getRootEditor(NodeState before, NodeState after, NodeBuilder rootBuilder, CommitInfo info) throws CommitFailedException {
return new VersionableEditor(this, rootBuilder);
}
}
@Override
public Editor childNodeAdded(String name, NodeState after) throws CommitFailedException {
final String path = PathUtils.concat(this.path, name);
// skip deleted nodes and well known paths that may not contain versionable nodes
if (after == null || SKIPPED_PATHS.contains(path)) {
return null;
}
// assign path field only after checking that we don't skip this subtree
this.path = path;
final VersionCopyConfiguration c = provider.config;
if (isVersionable.test(after)) {
final String versionableUuid = getProperty(after, JCR_UUID, Type.STRING);
if (c.isCopyVersions() && c.skipOrphanedVersionsCopy()) {
copyVersionHistory(after);
} else if (c.isCopyVersions() && !c.skipOrphanedVersionsCopy()) {
// all version histories have been copied, but maybe the date
// range for orphaned entries is narrower
if (c.getOrphanedMinDate().after(c.getVersionsMinDate())) {
copyVersionHistory(after);
}
}
if (isVersionHistoryExists(versionableUuid)) {
setVersionablePath(versionableUuid);
} else {
NodeBuilder versionableBuilder = getNodeBuilder(rootBuilder, this.path);
removeVersionProperties(versionableBuilder, isReferenceable);
if (isVersionable.test(versionableBuilder.getNodeState())) {
logger.warn("Node {} is still versionable. Creating empty version history.", path);
createEmptyHistory(versionableBuilder);
}
}
}
return this;
}
private boolean copyVersionHistory(NodeState versionable) {
assert versionable.exists();
final String versionableUuid = versionable.getProperty(JCR_UUID).getValue(Type.STRING);
return versionCopier.copyVersionHistory(versionableUuid, provider.config.getVersionsMinDate());
}
private void setVersionablePath(String versionableUuid) {
final NodeBuilder versionHistory = VersionHistoryUtil.getVersionHistoryBuilder(versionStorage, versionableUuid);
if (!versionHistory.hasProperty(provider.workspaceName)) {
versionHistory.setProperty(provider.workspaceName, path, Type.PATH);
}
addMixin(versionHistory, MIX_REP_VERSIONABLE_PATHS);
}
private boolean isVersionHistoryExists(String versionableUuid) {
return getVersionHistoryBuilder(versionStorage, versionableUuid).exists();
}
private void createEmptyHistory(NodeBuilder versionable) throws CommitFailedException {
vMgr.getOrCreateVersionHistory(versionable, Collections.emptyMap());
}
@Override
public Editor childNodeChanged(String name, NodeState before, NodeState after) throws CommitFailedException {
return childNodeAdded(name, after);
}
@Override
public Editor childNodeDeleted(String name, NodeState before) throws CommitFailedException {
return childNodeAdded(name, null);
}
@Override
public void leave(NodeState before, NodeState after) throws CommitFailedException {
this.path = PathUtils.getParentPath(this.path);
}
private static T getProperty(NodeState state, String name, Type type) {
if (state.hasProperty(name)) {
return state.getProperty(name).getValue(type);
}
return null;
}
private static NodeBuilder getNodeBuilder(NodeBuilder root, String path) {
NodeBuilder builder = root;
for (String name : PathUtils.elements(path)) {
builder = builder.getChildNode(name);
}
return builder;
}
}
