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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.handler;
import org.apache.log4j.Logger;
import org.apache.qpid.AMQException;
import org.apache.qpid.AMQChannelException;
import org.apache.qpid.AMQConnectionException;
import org.apache.qpid.AMQUnknownExchangeType;
import org.apache.qpid.protocol.AMQConstant;
import org.apache.qpid.framing.AMQFrame;
import org.apache.qpid.framing.ExchangeDeclareBody;
import org.apache.qpid.framing.ExchangeDeclareOkBody;
import org.apache.qpid.server.exchange.Exchange;
import org.apache.qpid.server.exchange.ExchangeRegistry;
import org.apache.qpid.server.exchange.ExchangeFactory;
import org.apache.qpid.protocol.AMQMethodEvent;
import org.apache.qpid.server.protocol.AMQProtocolSession;
import org.apache.qpid.server.queue.QueueRegistry;
import org.apache.qpid.server.state.AMQStateManager;
import org.apache.qpid.server.state.StateAwareMethodListener;
import org.apache.qpid.server.registry.ApplicationRegistry;
import org.apache.qpid.server.virtualhost.VirtualHost;
public class ExchangeDeclareHandler implements StateAwareMethodListener<ExchangeDeclareBody>
{
private static final Logger _logger = Logger.getLogger(ExchangeDeclareHandler.class);
private static final ExchangeDeclareHandler _instance = new ExchangeDeclareHandler();
public static ExchangeDeclareHandler getInstance()
{
return _instance;
}
private ExchangeDeclareHandler()
{
}
public void methodReceived(AMQStateManager stateManager, AMQMethodEvent<ExchangeDeclareBody> evt) throws AMQException
{
AMQProtocolSession session = stateManager.getProtocolSession();
VirtualHost virtualHost = session.getVirtualHost();
ExchangeRegistry exchangeRegistry = virtualHost.getExchangeRegistry();
ExchangeFactory exchangeFactory = virtualHost.getExchangeFactory();
final ExchangeDeclareBody body = evt.getMethod();
if (_logger.isDebugEnabled())
{
_logger.debug("Request to declare exchange of type " + body.type + " with name " + body.exchange);
}
synchronized(exchangeRegistry)
{
Exchange exchange = exchangeRegistry.getExchange(body.exchange);
if (exchange == null)
{
if(body.passive && ((body.type == null) || body.type.length() ==0))
{
throw body.getChannelException(AMQConstant.NOT_FOUND.getCode(), "Unknown exchange: " + body.exchange);
}
else
{
try
{
exchange = exchangeFactory.createExchange(body.exchange, body.type, body.durable,
body.passive, body.ticket);
exchangeRegistry.registerExchange(exchange);
}
catch(AMQUnknownExchangeType e)
{
throw body.getConnectionException(AMQConstant.COMMAND_INVALID.getCode(), "Unknown exchange: " + body.exchange,e);
}
}
}
else if (!exchange.getType().equals(body.type))
{
throw new AMQConnectionException(AMQConstant.NOT_ALLOWED.getCode(), "Attempt to redeclare exchange: " + body.exchange + " of type " + exchange.getType() + " to " + body.type +".",body.getClazz(), body.getMethod(),body.getMajor(),body.getMinor());
}
}
if(!body.nowait)
{
// AMQP version change: Hardwire the version to 0-8 (major=8, minor=0)
// TODO: Connect this to the session version obtained from ProtocolInitiation for this session.
// Be aware of possible changes to parameter order as versions change.
AMQFrame response = ExchangeDeclareOkBody.createAMQFrame(evt.getChannelId(), (byte)8, (byte)0);
session.writeFrame(response);
}
}
}
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