001/*
002 * Licensed to DuraSpace under one or more contributor license agreements.
003 * See the NOTICE file distributed with this work for additional information
004 * regarding copyright ownership.
005 *
006 * DuraSpace licenses this file to you under the Apache License,
007 * Version 2.0 (the "License"); you may not use this file except in
008 * compliance with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018
019package org.fcrepo.persistence.ocfl.impl;
020
021import org.fcrepo.kernel.api.operations.CreateVersionResourceOperation;
022import org.fcrepo.kernel.api.operations.ResourceOperation;
023import org.fcrepo.kernel.api.operations.ResourceOperationType;
024import org.fcrepo.persistence.api.exceptions.PersistentItemConflictException;
025import org.fcrepo.persistence.api.exceptions.PersistentStorageException;
026import org.fcrepo.persistence.common.ResourceHeaderUtils;
027import org.fcrepo.persistence.ocfl.api.FedoraToOcflObjectIndex;
028import org.fcrepo.storage.ocfl.CommitType;
029import org.slf4j.Logger;
030import org.slf4j.LoggerFactory;
031
032/**
033 * Persister for creating a new OCFL version of a resource. The new version is not created until the session
034 * is committed.
035 *
036 * @author pwinckles
037 */
038public class CreateVersionPersister extends AbstractPersister {
039
040    private static final Logger LOG = LoggerFactory.getLogger(CreateVersionPersister.class);
041
042    protected CreateVersionPersister(final FedoraToOcflObjectIndex index) {
043        super(CreateVersionResourceOperation.class, ResourceOperationType.UPDATE, index);
044    }
045
046    @Override
047    public void persist(final OcflPersistentStorageSession session, final ResourceOperation operation)
048            throws PersistentStorageException {
049
050        final var resourceId = operation.getResourceId();
051        LOG.debug("creating new version of <{}> in session <{}>", resourceId, session);
052
053        final var archivalGroupId = findArchivalGroupInAncestry(resourceId, session);
054
055        if (archivalGroupId.isPresent() && !archivalGroupId.get().equals(resourceId)) {
056            throw new PersistentItemConflictException(
057                    String.format("Resource <%s> is contained in Archival Group <%s> and cannot be versioned directly."
058                            + " Version the Archival Group instead.", resourceId, archivalGroupId));
059        }
060
061        final var ocflMapping = getMapping(operation.getTransaction(), resourceId);
062        final var ocflObjectSession = session.findOrCreateSession(ocflMapping.getOcflObjectId());
063
064        // Touching the last modified date is necessary so that resource that do not have any outstanding changes are
065        // still versioned
066        final var headers = new ResourceHeadersAdapter(ocflObjectSession.readHeaders(resourceId.getResourceId()))
067                .asKernelHeaders();
068        ResourceHeaderUtils.touchMementoCreateHeaders(headers);
069
070        ocflObjectSession.writeHeaders(new ResourceHeadersAdapter(headers).asStorageHeaders());
071        // The version is not actually created until the session is committed
072        ocflObjectSession.commitType(CommitType.NEW_VERSION);
073    }
074
075}