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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.berkeleydb;
import java.io.File;
import java.util.concurrent.atomic.AtomicBoolean;
import com.sleepycat.je.DatabaseException;
import org.apache.log4j.Logger;
import org.apache.qpid.server.model.ConfiguredObject;
import org.apache.qpid.server.store.FileBasedSettings;
import org.apache.qpid.server.store.SizeMonitoringSettings;
import org.apache.qpid.server.store.StoreException;
import org.apache.qpid.util.FileUtils;
/**
* Implementation of a MessageStore backed by BDB JE.
*/
public class BDBMessageStore extends AbstractBDBMessageStore
{
private static final Logger LOGGER = Logger.getLogger(BDBMessageStore.class);
private final EnvironmentFacadeFactory _environmentFacadeFactory;
private final AtomicBoolean _messageStoreOpen = new AtomicBoolean();
private EnvironmentFacade _environmentFacade;
private ConfiguredObject<?> _parent;
private String _storeLocation;
private long _persistentSizeLowThreshold;
private long _persistentSizeHighThreshold;
public BDBMessageStore()
{
this(new StandardEnvironmentFacadeFactory());
}
public BDBMessageStore(EnvironmentFacadeFactory environmentFacadeFactory)
{
_environmentFacadeFactory = environmentFacadeFactory;
}
@Override
public void openMessageStore(final ConfiguredObject<?> parent)
{
if (_messageStoreOpen.compareAndSet(false, true))
{
_parent = parent;
final SizeMonitoringSettings sizeMonitorSettings = (SizeMonitoringSettings) parent;
_persistentSizeHighThreshold = sizeMonitorSettings.getStoreOverfullSize();
_persistentSizeLowThreshold = sizeMonitorSettings.getStoreUnderfullSize();
if (_persistentSizeLowThreshold > _persistentSizeHighThreshold || _persistentSizeLowThreshold < 0l)
{
_persistentSizeLowThreshold = _persistentSizeHighThreshold;
}
_environmentFacade = _environmentFacadeFactory.createEnvironmentFacade(parent);
_storeLocation = _environmentFacade.getStoreLocation();
}
}
@Override
public void closeMessageStore()
{
if (_messageStoreOpen.compareAndSet(true, false))
{
if (_environmentFacade != null)
{
try
{
_environmentFacade.close();
_environmentFacade = null;
}
catch (DatabaseException e)
{
throw new StoreException("Exception occurred on message store close", e);
}
}
}
}
@Override
public void onDelete(ConfiguredObject<?> parent)
{
if (LOGGER.isDebugEnabled())
{
LOGGER.debug("Deleting store " + _storeLocation);
}
FileBasedSettings fileBasedSettings = (FileBasedSettings)parent;
String storePath = fileBasedSettings.getStorePath();
if (storePath != null)
{
File configFile = new File(storePath);
if (!FileUtils.delete(configFile, true))
{
LOGGER.info("Failed to delete the store at location " + storePath);
}
}
_storeLocation = null;
}
@Override
public EnvironmentFacade getEnvironmentFacade()
{
return _environmentFacade;
}
@Override
protected long getPersistentSizeLowThreshold()
{
return _persistentSizeLowThreshold;
}
@Override
protected long getPersistentSizeHighThreshold()
{
return _persistentSizeHighThreshold;
}
@Override
protected Logger getLogger()
{
return LOGGER;
}
@Override
protected void checkMessageStoreOpen()
{
if (!_messageStoreOpen.get())
{
throw new IllegalStateException("Message store is not open");
}
}
@Override
protected ConfiguredObject<?> getParent()
{
return _parent;
}
@Override
public String getStoreLocation()
{
return _storeLocation;
}
}
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