001/*
002 * Copyright 2019 DuraSpace, Inc.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.fcrepo.migration.handlers.ocfl;
018
019import edu.wisc.library.ocfl.api.MutableOcflRepository;
020import org.fcrepo.storage.ocfl.OcflObjectSession;
021import org.fcrepo.storage.ocfl.OcflObjectSessionFactory;
022import org.slf4j.Logger;
023import org.slf4j.LoggerFactory;
024
025import java.nio.file.Path;
026import java.util.UUID;
027
028/**
029 * Factory for PlainOcflObjectSessions
030 *
031 * @author pwinckles
032 */
033public class PlainOcflObjectSessionFactory implements OcflObjectSessionFactory {
034
035    private static final Logger LOG = LoggerFactory.getLogger(PlainOcflObjectSessionFactory.class);
036
037    private final MutableOcflRepository ocflRepo;
038    private final Path stagingRoot;
039    private final String defaultVersionMessage;
040    private final String defaultVersionUserName;
041    private final String defaultVersionUserAddress;
042
043    private boolean closed = false;
044
045    /**
046     * @param ocflRepo the OCFL client
047     * @param stagingRoot the root staging directory
048     * @param defaultVersionMessage OCFL version message
049     * @param defaultVersionUserName OCFL version user
050     * @param defaultVersionUserAddress OCFL version user address
051     */
052    public PlainOcflObjectSessionFactory(final MutableOcflRepository ocflRepo,
053                                         final Path stagingRoot,
054                                         final String defaultVersionMessage,
055                                         final String defaultVersionUserName,
056                                         final String defaultVersionUserAddress) {
057        this.ocflRepo = ocflRepo;
058        this.stagingRoot = stagingRoot;
059        this.defaultVersionMessage = defaultVersionMessage;
060        this.defaultVersionUserName = defaultVersionUserName;
061        this.defaultVersionUserAddress = defaultVersionUserAddress;
062    }
063
064    @Override
065    public OcflObjectSession newSession(final String ocflObjectId) {
066        enforceOpen();
067
068        final var sessionId = UUID.randomUUID().toString();
069        final var session = new PlainOcflObjectSession(
070                sessionId,
071                ocflRepo,
072                ocflObjectId,
073                stagingRoot.resolve(sessionId)
074        );
075
076        session.versionAuthor(defaultVersionUserName, defaultVersionUserAddress);
077        session.versionMessage(defaultVersionMessage);
078        return session;
079    }
080
081    @Override
082    public void close() {
083        if (!closed) {
084            closed = true;
085            ocflRepo.close();
086        }
087    }
088
089    private void enforceOpen() {
090        if (closed) {
091            throw new IllegalStateException("The session factory is closed!");
092        }
093    }
094
095}