/*
*
* 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.
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*/
package org.apache.qpid.server.handler;
import org.apache.log4j.Logger;
import org.apache.qpid.AMQConnectionException;
import org.apache.qpid.AMQException;
import org.apache.qpid.AMQUnknownExchangeType;
import org.apache.qpid.framing.AMQMethodBody;
import org.apache.qpid.framing.AMQShortString;
import org.apache.qpid.framing.ExchangeDeclareBody;
import org.apache.qpid.framing.MethodRegistry;
import org.apache.qpid.protocol.AMQConstant;
import org.apache.qpid.server.AMQChannel;
import org.apache.qpid.server.exchange.Exchange;
import org.apache.qpid.server.exchange.ExchangeFactory;
import org.apache.qpid.server.exchange.ExchangeRegistry;
import org.apache.qpid.server.protocol.AMQProtocolSession;
import org.apache.qpid.server.state.AMQStateManager;
import org.apache.qpid.server.state.StateAwareMethodListener;
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, ExchangeDeclareBody body, int channelId) throws AMQException
{
AMQProtocolSession session = stateManager.getProtocolSession();
VirtualHost virtualHost = session.getVirtualHost();
ExchangeRegistry exchangeRegistry = virtualHost.getExchangeRegistry();
ExchangeFactory exchangeFactory = virtualHost.getExchangeFactory();
final AMQChannel channel = session.getChannel(channelId);
if (channel == null)
{
throw body.getChannelNotFoundException(channelId);
}
final AMQShortString exchangeName = body.getExchange();
if (_logger.isDebugEnabled())
{
_logger.debug("Request to declare exchange of type " + body.getType() + " with name " + exchangeName);
}
synchronized(exchangeRegistry)
{
Exchange exchange = exchangeRegistry.getExchange(exchangeName);
if (exchange == null)
{
if(body.getPassive() && ((body.getType() == null) || body.getType().length() ==0))
{
throw body.getChannelException(AMQConstant.NOT_FOUND, "Unknown exchange: " + exchangeName);
}
else if(exchangeName.startsWith("amq."))
{
throw body.getConnectionException(AMQConstant.NOT_ALLOWED,
"Attempt to declare exchange: " + exchangeName +
" which begins with reserved prefix 'amq.'.");
}
else if(exchangeName.startsWith("qpid."))
{
throw body.getConnectionException(AMQConstant.NOT_ALLOWED,
"Attempt to declare exchange: " + exchangeName +
" which begins with reserved prefix 'qpid.'.");
}
else
{
try
{
exchange = exchangeFactory.createExchange(exchangeName == null ? null : exchangeName.intern(),
body.getType() == null ? null : body.getType().intern(),
body.getDurable(),
body.getPassive(), body.getTicket());
exchangeRegistry.registerExchange(exchange);
if (exchange.isDurable())
{
virtualHost.getMessageStore().createExchange(exchange);
}
}
catch(AMQUnknownExchangeType e)
{
throw body.getConnectionException(AMQConstant.COMMAND_INVALID, "Unknown exchange: " + exchangeName,e);
}
}
}
else if (!exchange.getTypeShortString().equals(body.getType()) && !((body.getType() == null || body.getType().length() ==0) && body.getPassive()))
{
throw new AMQConnectionException(AMQConstant.NOT_ALLOWED, "Attempt to redeclare exchange: " +
exchangeName + " of type " + exchange.getTypeShortString() + " to " + body.getType() +".",body.getClazz(), body.getMethod(),body.getMajor(),body.getMinor(),null);
}
}
if(!body.getNowait())
{
MethodRegistry methodRegistry = session.getMethodRegistry();
AMQMethodBody responseBody = methodRegistry.createExchangeDeclareOkBody();
channel.sync();
session.writeFrame(responseBody.generateFrame(channelId));
}
}
}