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package org.apache.qpid.server.store.berkeleydb;
/*
*
* 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 org.apache.qpid.server.configuration.VirtualHostConfiguration;
import org.apache.qpid.server.connection.IConnectionRegistry;
import org.apache.qpid.server.logging.subjects.MessageStoreLogSubject;
import org.apache.qpid.server.model.VirtualHost;
import org.apache.qpid.server.stats.StatisticsGatherer;
import org.apache.qpid.server.store.DurableConfigurationStore;
import org.apache.qpid.server.store.Event;
import org.apache.qpid.server.store.EventListener;
import org.apache.qpid.server.store.MessageStore;
import org.apache.qpid.server.store.OperationalLoggingListener;
import org.apache.qpid.server.virtualhost.AbstractVirtualHost;
import org.apache.qpid.server.virtualhost.State;
import org.apache.qpid.server.virtualhost.VirtualHostConfigRecoveryHandler;
import org.apache.qpid.server.virtualhost.VirtualHostRegistry;
public class BDBHAVirtualHost extends AbstractVirtualHost
{
private BDBHAMessageStore _messageStore;
private boolean _inVhostInitiatedClose;
BDBHAVirtualHost(VirtualHostRegistry virtualHostRegistry,
StatisticsGatherer brokerStatisticsGatherer,
org.apache.qpid.server.security.SecurityManager parentSecurityManager,
VirtualHostConfiguration hostConfig,
VirtualHost virtualHost)
throws Exception
{
super(virtualHostRegistry, brokerStatisticsGatherer, parentSecurityManager, hostConfig, virtualHost);
}
protected void initialiseStorage(VirtualHostConfiguration hostConfig, VirtualHost virtualHost) throws Exception
{
_messageStore = new BDBHAMessageStore();
final MessageStoreLogSubject storeLogSubject =
new MessageStoreLogSubject(this, _messageStore.getClass().getSimpleName());
OperationalLoggingListener.listen(_messageStore, storeLogSubject);
_messageStore.addEventListener(new BeforeActivationListener(), Event.BEFORE_ACTIVATE);
_messageStore.addEventListener(new AfterActivationListener(), Event.AFTER_ACTIVATE);
_messageStore.addEventListener(new BeforeCloseListener(), Event.BEFORE_CLOSE);
_messageStore.addEventListener(new AfterInitialisationListener(), Event.AFTER_INIT);
_messageStore.addEventListener(new BeforePassivationListener(), Event.BEFORE_PASSIVATE);
VirtualHostConfigRecoveryHandler recoveryHandler = new VirtualHostConfigRecoveryHandler(this);
_messageStore.configureConfigStore(getName(),
recoveryHandler,
virtualHost);
_messageStore.configureMessageStore(getName(),
recoveryHandler,
recoveryHandler
);
}
protected void closeStorage()
{
//Close MessageStore
if (_messageStore != null)
{
//Remove MessageStore Interface should not throw Exception
try
{
_inVhostInitiatedClose = true;
getMessageStore().close();
}
catch (Exception e)
{
getLogger().error("Failed to close message store", e);
}
finally
{
_inVhostInitiatedClose = false;
}
}
}
@Override
public DurableConfigurationStore getDurableConfigurationStore()
{
return _messageStore;
}
@Override
public MessageStore getMessageStore()
{
return _messageStore;
}
private final class AfterInitialisationListener implements EventListener
{
public void event(Event event)
{
setState(State.PASSIVE);
}
}
private final class BeforePassivationListener implements EventListener
{
public void event(Event event)
{
State finalState = State.ERRORED;
try
{
/* the approach here is not ideal as there is a race condition where a
* queue etc could be created while the virtual host is on the way to
* the passivated state. However the store state change from MASTER to UNKNOWN
* is documented as exceptionally rare..
*/
getConnectionRegistry().close(IConnectionRegistry.VHOST_PASSIVATE_REPLY_TEXT);
removeHouseKeepingTasks();
getQueueRegistry().stopAllAndUnregisterMBeans();
getExchangeRegistry().clearAndUnregisterMbeans();
getDtxRegistry().close();
finalState = State.PASSIVE;
}
finally
{
setState(finalState);
reportIfError(getState());
}
}
}
private final class BeforeActivationListener implements EventListener
{
@Override
public void event(Event event)
{
try
{
initialiseModel(getConfiguration());
}
catch (Exception e)
{
throw new RuntimeException("Failed to initialise virtual host after state change", e);
}
}
}
private final class AfterActivationListener implements EventListener
{
@Override
public void event(Event event)
{
attainActivation();
}
}
private final class BeforeCloseListener implements EventListener
{
@Override
public void event(Event event)
{
if(!_inVhostInitiatedClose)
{
shutdownHouseKeeping();
}
}
}
}
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