/*
*
* 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.exchange;
import org.apache.log4j.Logger;
import org.apache.qpid.AMQException;
import org.apache.qpid.framing.AMQShortString;
import org.apache.qpid.server.exchange.ExchangeInitialiser;
import org.apache.qpid.server.queue.IncomingMessage;
import org.apache.qpid.server.store.DurableConfigurationStore;
import org.apache.qpid.server.virtualhost.VirtualHost;
import java.util.Collection;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
public class DefaultExchangeRegistry implements ExchangeRegistry
{
private static final Logger _log = Logger.getLogger(DefaultExchangeRegistry.class);
/**
* Maps from exchange name to exchange instance
*/
private ConcurrentMap<AMQShortString, Exchange> _exchangeMap = new ConcurrentHashMap<AMQShortString, Exchange>();
private ConcurrentMap<String, Exchange> _exchangeMapStr = new ConcurrentHashMap<String, Exchange>();
private Exchange _defaultExchange;
private VirtualHost _host;
public DefaultExchangeRegistry(VirtualHost host)
{
//create 'standard' exchanges:
_host = host;
}
public void initialise() throws AMQException
{
new ExchangeInitialiser().initialise(_host.getExchangeFactory(), this, getDurableConfigurationStore());
}
public DurableConfigurationStore getDurableConfigurationStore()
{
return _host.getDurableConfigurationStore();
}
public void registerExchange(Exchange exchange) throws AMQException
{
_exchangeMap.put(exchange.getName(), exchange);
_exchangeMapStr.put(exchange.getName().toString(), exchange);
}
public void setDefaultExchange(Exchange exchange)
{
_defaultExchange = exchange;
}
public Exchange getDefaultExchange()
{
return _defaultExchange;
}
public Collection<AMQShortString> getExchangeNames()
{
return _exchangeMap.keySet();
}
public void unregisterExchange(AMQShortString name, boolean inUse) throws AMQException
{
// TODO: check inUse argument
Exchange e = _exchangeMap.remove(name);
_exchangeMapStr.remove(name.toString());
if (e != null)
{
if (e.isDurable())
{
getDurableConfigurationStore().removeExchange(e);
}
e.close();
}
else
{
throw new AMQException("Unknown exchange " + name);
}
}
public void unregisterExchange(String name, boolean inUse) throws AMQException
{
unregisterExchange(new AMQShortString(name), inUse);
}
public Exchange getExchange(AMQShortString name)
{
if ((name == null) || name.length() == 0)
{
return getDefaultExchange();
}
else
{
return _exchangeMap.get(name);
}
}
public Exchange getExchange(String name)
{
if ((name == null) || name.length() == 0)
{
return getDefaultExchange();
}
else
{
return _exchangeMapStr.get(name);
}
}
/**
* Routes content through exchanges, delivering it to 1 or more queues.
* @param payload
* @throws AMQException if something goes wrong delivering data
*/
public void routeContent(IncomingMessage payload) throws AMQException
{
final AMQShortString exchange = payload.getExchange();
final Exchange exch = getExchange(exchange);
// there is a small window of opportunity for the exchange to be deleted in between
// the BasicPublish being received (where the exchange is validated) and the final
// content body being received (which triggers this method)
// TODO: check where the exchange is validated
if (exch == null)
{
throw new AMQException("Exchange '" + exchange + "' does not exist");
}
payload.enqueue(exch.route(payload));
}
}