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/*
*
* 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.qpid.server.store;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import org.apache.qpid.server.model.ConfiguredObject;
import org.apache.qpid.server.store.handler.ConfiguredObjectRecordHandler;
public abstract class AbstractMemoryStore implements DurableConfigurationStore, MessageStoreProvider
{
private final MessageStore _messageStore = new MemoryMessageStore();
private final Class<? extends ConfiguredObject> _rootClass;
private final ConcurrentMap<UUID, ConfiguredObjectRecord> _configuredObjectRecords = new ConcurrentHashMap<UUID, ConfiguredObjectRecord>();
protected AbstractMemoryStore(final Class<? extends ConfiguredObject> rootClass)
{
_rootClass = rootClass;
}
@Override
public void create(ConfiguredObjectRecord record)
{
if (_configuredObjectRecords.putIfAbsent(record.getId(), record) != null)
{
throw new StoreException("Record with id " + record.getId() + " is already present");
}
}
@Override
public void update(boolean createIfNecessary, ConfiguredObjectRecord... records)
{
for (ConfiguredObjectRecord record : records)
{
if(createIfNecessary)
{
_configuredObjectRecords.put(record.getId(), record);
}
else
{
ConfiguredObjectRecord previousValue = _configuredObjectRecords.replace(record.getId(), record);
if (previousValue == null)
{
throw new StoreException("Record with id " + record.getId() + " does not exist");
}
}
}
}
@Override
public UUID[] remove(final ConfiguredObjectRecord... objects)
{
List<UUID> removed = new ArrayList<UUID>();
for (ConfiguredObjectRecord record : objects)
{
if (_configuredObjectRecords.remove(record.getId()) != null)
{
removed.add(record.getId());
}
}
return removed.toArray(new UUID[removed.size()]);
}
@Override
public void openConfigurationStore(ConfiguredObject<?> parent,
final boolean overwrite,
final ConfiguredObjectRecord... initialRecords)
{
for(ConfiguredObjectRecord record : initialRecords)
{
_configuredObjectRecords.put(record.getId(), record);
}
}
@Override
public void upgradeStoreStructure() throws StoreException
{
}
@Override
public void closeConfigurationStore()
{
_configuredObjectRecords.clear();
}
@Override
public void visitConfiguredObjectRecords(ConfiguredObjectRecordHandler handler) throws StoreException
{
handler.begin();
for (ConfiguredObjectRecord record : _configuredObjectRecords.values())
{
if (!handler.handle(record))
{
break;
}
}
handler.end();
}
@Override
public MessageStore getMessageStore()
{
return _messageStore;
}
@Override
public void onDelete()
{
}
}
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