/*
* 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.clerezza.platform.graphprovider.content;
import org.apache.clerezza.platform.Constants;
import org.apache.clerezza.rdf.core.MGraph;
import org.apache.clerezza.rdf.core.UriRef;
import org.apache.clerezza.rdf.core.access.EntityAlreadyExistsException;
import org.apache.clerezza.rdf.core.access.NoSuchEntityException;
import org.apache.clerezza.rdf.core.access.TcManager;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* A utility class to rename used in snapshot versions to the naming in the first released version
*
* @author reto
*/
public class GraphNameTransitioner {
private final static Logger logger = LoggerFactory.getLogger(GraphNameTransitioner.class);
/**
* a hack to prevent double execution on the same start up process
*/
private static boolean alreadyExecuted = false;
synchronized static public void renameGraphsWithOldNames(TcManager tcManager) {
if (alreadyExecuted) {
return;
} else {
alreadyExecuted = true;
}
/*try {
//just to see that nothing bad happens
Thread.sleep(20*1000);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
}*/
final String OLD_SYSTEM_GRAPH_URI_STRING =
"http://tpf.localhost/system.graph";
final UriRef OLD_SYSTEM_GRAPH_URI =
new UriRef(OLD_SYSTEM_GRAPH_URI_STRING);
final String OLD_CONFIG_GRAPH_URI_STRING =
"http://tpf.localhost/config.graph";
final UriRef OLD_CONFIG_GRAPH_URI =
new UriRef(OLD_CONFIG_GRAPH_URI_STRING);
final String OLD_CONTENT_GRAPH_URI_STRING =
"http://tpf.localhost/content.graph";
final UriRef OLD_CONTENT_GRAPH_URI =
new UriRef(OLD_CONTENT_GRAPH_URI_STRING);
renameGraphs(tcManager, OLD_SYSTEM_GRAPH_URI, Constants.SYSTEM_GRAPH_URI);
renameGraphs(tcManager, OLD_CONFIG_GRAPH_URI, Constants.CONFIG_GRAPH_URI);
renameGraphs(tcManager, OLD_CONTENT_GRAPH_URI, Constants.CONTENT_GRAPH_URI);
renameGraphs(tcManager, new UriRef("http://zz.localhost/graph-access.graph"),
new UriRef(Constants.URN_LOCAL_INSTANCE+"/graph-access.graph"));
}
private static void renameGraphs(TcManager tcManager, UriRef oldGraphUri, UriRef graphUri) {
try {
MGraph oldMGraph = tcManager.getMGraph(oldGraphUri);
MGraph newMGraph = tcManager.createMGraph(graphUri);
logger.info("renaming "+oldGraphUri+" to "+graphUri);
newMGraph.addAll(oldMGraph);
tcManager.deleteTripleCollection(oldGraphUri);
} catch (NoSuchEntityException ex) {
} catch (EntityAlreadyExistsException ex) {
logger.warn("could not rename " + oldGraphUri + " to " +
graphUri + " because target graph already exists", ex);
}
}
}