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package org.apache.qpid.server.configuration.startup;/*
*
* 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.
*
*/
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import org.apache.qpid.server.configuration.ConfigurationEntry;
import org.apache.qpid.server.configuration.ConfigurationEntryStore;
import org.apache.qpid.server.model.Broker;
public abstract class StoreUpgrader
{
private static Map<String, StoreUpgrader> _upgraders = new HashMap<String, StoreUpgrader>();
// Note: don't use externally defined constants in upgraders in case they change, the values here MUST stay the same
// no matter what changes are made to the code in the future
private final static StoreUpgrader UPGRADE_1_0 = new StoreUpgrader("1.0")
{
@Override
protected void doUpgrade(ConfigurationEntryStore store)
{
ConfigurationEntry root = store.getRootEntry();
Map<String, Collection<ConfigurationEntry>> children = root.getChildren();
Collection<ConfigurationEntry> vhosts = children.get("VirtualHost");
Collection<ConfigurationEntry> changed = new HashSet<ConfigurationEntry>();
for(ConfigurationEntry vhost : vhosts)
{
Map<String, Object> attributes = vhost.getAttributes();
if(attributes.containsKey("storeType"))
{
attributes = new HashMap<String, Object>(attributes);
attributes.put("type", "STANDARD");
changed.add(new ConfigurationEntry(vhost.getId(),vhost.getType(),attributes,vhost.getChildrenIds(),store));
}
}
Map<String, Object> attributes = new HashMap<String, Object>(root.getAttributes());
attributes.put(Broker.MODEL_VERSION, "1.1");
changed.add(new ConfigurationEntry(root.getId(),root.getType(),attributes,root.getChildrenIds(),store));
store.save(changed.toArray(new ConfigurationEntry[changed.size()]));
}
};
private final static StoreUpgrader UPGRADE_1_1 = new StoreUpgrader("1.1")
{
@Override
protected void doUpgrade(ConfigurationEntryStore store)
{
ConfigurationEntry root = store.getRootEntry();
Map<String, Object> attributes = new HashMap<String, Object>(root.getAttributes());
attributes.put(Broker.MODEL_VERSION, "1.2");
ConfigurationEntry newRoot = new ConfigurationEntry(root.getId(),root.getType(),attributes,root.getChildrenIds(),store);
store.save(newRoot);
}
};
private StoreUpgrader(String version)
{
_upgraders.put(version, this);
}
public static void upgrade(ConfigurationEntryStore store)
{
StoreUpgrader upgrader = null;
while ((upgrader = _upgraders.get(store.getRootEntry().getAttributes().get(Broker.MODEL_VERSION).toString())) != null)
{
upgrader.doUpgrade(store);
}
}
protected abstract void doUpgrade(ConfigurationEntryStore store);
}
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