org.apache.jackrabbit.oak.run.ResetClusterIdCommand Maven / Gradle / Ivy
/*
* 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.run;
import org.apache.jackrabbit.oak.api.CommitFailedException;
import org.apache.jackrabbit.oak.api.Type;
import org.apache.jackrabbit.oak.run.commons.Command;
import org.apache.jackrabbit.oak.spi.cluster.ClusterRepositoryInfo;
import org.apache.jackrabbit.oak.spi.commit.CommitInfo;
import org.apache.jackrabbit.oak.spi.commit.EmptyHook;
import org.apache.jackrabbit.oak.spi.state.NodeBuilder;
import org.apache.jackrabbit.oak.spi.state.NodeStore;
import com.google.common.io.Closer;
/**
* OFFLINE utility to delete the clusterId stored as hidden
* property as defined by ClusterRepositoryInfo.
*
* This utility is meant to be the only mechanism to delete
* this id and yes, it is meant to be used offline only
* (as otherwise this would correspond to breaking the
* requirement that the clusterId be stable and persistent).
*
* Target use case for this tool is to avoid duplicate
* clusterIds after a repository was cloned.
*/
class ResetClusterIdCommand implements Command {
private static void deleteClusterId(NodeStore store) {
NodeBuilder builder = store.getRoot().builder();
NodeBuilder clusterConfigNode = builder.getChildNode(
ClusterRepositoryInfo.CLUSTER_CONFIG_NODE);
if (!clusterConfigNode.exists()) {
// if it doesn't exist, then there is no way to delete
System.out.println("clusterId was never set or already deleted.");
return;
}
if (!clusterConfigNode.hasProperty(ClusterRepositoryInfo.CLUSTER_ID_PROP)) {
// the config node exists, but the clusterId not
// so again, no way to delete
System.out.println("clusterId was never set or already deleted.");
return;
}
String oldClusterId = clusterConfigNode.getProperty(ClusterRepositoryInfo.CLUSTER_ID_PROP)
.getValue(Type.STRING);
clusterConfigNode.removeProperty(ClusterRepositoryInfo.CLUSTER_ID_PROP);
try {
store.merge(builder, EmptyHook.INSTANCE, CommitInfo.EMPTY);
System.out.println("clusterId deleted successfully. (old id was " + oldClusterId + ")");
} catch (CommitFailedException e) {
System.err.println("Failed to delete clusterId due to exception: " + e.getMessage());
e.printStackTrace();
}
}
@Override
public void execute(String... args) throws Exception {
String help = "resetclusterid {||}";
Utils.NodeStoreOptions opts = new Utils.NodeStoreOptions(help).parse(args);
Closer closer = Utils.createCloserWithShutdownHook();
try {
NodeStore store = Utils.bootstrapNodeStore(opts, closer);
deleteClusterId(store);
} catch (Throwable e) {
throw closer.rethrow(e);
} finally {
closer.close();
}
}
}