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VersionService.java
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VersionService.java
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/**
* Copyright 2013 DuraSpace, Inc.
*
* Licensed 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.fcrepo.kernel.services;
import org.fcrepo.kernel.Transaction;
import org.slf4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import javax.jcr.RepositoryException;
import javax.jcr.Session;
import static org.slf4j.LoggerFactory.getLogger;
/**
* This service exposes management of node versioning. Instead of invoking
* the JCR VersionManager methods, this provides a level of indirection that
* allows for special handling of features built on top of JCR such as user
* transactions.
* @author Mike Durbin
*/
@Component
public class VersionService extends RepositoryService {
private static final Logger logger = getLogger(VersionService.class);
protected static final String VERSIONABLE = "mix:versionable";
@Autowired
TransactionService txService;
/**
* Creates a version checkpoint for the given path if versioning is enabled
* for that node type. When versioning is enabled this is the equivalent of
* VersionManager#checkpoint(path), except that it is aware of
* TxSessions and queues these operations accordingly.
*
* @param session
* @param absPath the absolute path to the node for whom a new version is
* to be minted
* @throws RepositoryException
*/
public void checkpoint(final Session session, String absPath) throws RepositoryException {
if (session.getNode(absPath).isNodeType(VERSIONABLE)) {
logger.trace("Setting checkpoint for {}", absPath);
String txId = TransactionService.getCurrentTransactionId(session);
if (txId != null) {
Transaction tx = txService.getTransaction(txId);
tx.addPathToVersion(absPath);
} else {
session.getWorkspace().getVersionManager().checkpoint(absPath);
}
} else {
logger.trace("No checkpoint set for unversionable {}", absPath);
}
}
}