/*
*
* 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.exchange;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import org.apache.log4j.Logger;
import org.apache.qpid.AMQConnectionException;
import org.apache.qpid.AMQException;
import org.apache.qpid.AMQSecurityException;
import org.apache.qpid.AMQUnknownExchangeType;
import org.apache.qpid.framing.AMQShortString;
import org.apache.qpid.protocol.AMQConstant;
import org.apache.qpid.qmf.ManagementExchange;
import org.apache.qpid.server.configuration.VirtualHostConfiguration;
import org.apache.qpid.server.registry.ApplicationRegistry;
import org.apache.qpid.server.virtualhost.VirtualHost;
public class DefaultExchangeFactory implements ExchangeFactory
{
private static final Logger _logger = Logger.getLogger(DefaultExchangeFactory.class);
private Map<AMQShortString, ExchangeType<? extends Exchange>> _exchangeClassMap = new HashMap<AMQShortString, ExchangeType<? extends Exchange>>();
private final VirtualHost _host;
public DefaultExchangeFactory(VirtualHost host)
{
_host = host;
registerExchangeType(DirectExchange.TYPE);
registerExchangeType(TopicExchange.TYPE);
registerExchangeType(HeadersExchange.TYPE);
registerExchangeType(FanoutExchange.TYPE);
registerExchangeType(ManagementExchange.TYPE);
}
public void registerExchangeType(ExchangeType<? extends Exchange> type)
{
_exchangeClassMap.put(type.getName(), type);
}
public Collection<ExchangeType<? extends Exchange>> getRegisteredTypes()
{
return _exchangeClassMap.values();
}
public Collection<ExchangeType<? extends Exchange>> getPublicCreatableTypes()
{
Collection<ExchangeType<? extends Exchange>> publicTypes =
new ArrayList<ExchangeType<? extends Exchange>>();
publicTypes.addAll(_exchangeClassMap.values());
//Remove the ManagementExchange type if present, as these
//are private and cannot be created by external means
publicTypes.remove(ManagementExchange.TYPE);
return publicTypes;
}
public Exchange createExchange(String exchange, String type, boolean durable, boolean autoDelete)
throws AMQException
{
return createExchange(new AMQShortString(exchange), new AMQShortString(type), durable, autoDelete, 0);
}
public Exchange createExchange(AMQShortString exchange, AMQShortString type, boolean durable, boolean autoDelete,
int ticket)
throws AMQException
{
// Check access
if (!_host.getSecurityManager().authoriseCreateExchange(autoDelete, durable, exchange, null, null, null, type))
{
String description = "Permission denied: exchange-name '" + exchange.asString() + "'";
throw new AMQSecurityException(description);
}
ExchangeType<? extends Exchange> exchType = _exchangeClassMap.get(type);
if (exchType == null)
{
throw new AMQUnknownExchangeType("Unknown exchange type: " + type,null);
}
Exchange e = exchType.newInstance(_host, exchange, durable, ticket, autoDelete);
return e;
}
public void initialise(VirtualHostConfiguration hostConfig)
{
if (hostConfig == null)
{
return;
}
for(Object className : hostConfig.getCustomExchanges())
{
try
{
ExchangeType<?> exchangeType = ApplicationRegistry.getInstance().getPluginManager().getExchanges().get(String.valueOf(className));
if (exchangeType == null)
{
_logger.error("No such custom exchange class found: \""+String.valueOf(className)+"\"");
return;
}
Class<? extends ExchangeType> exchangeTypeClass = exchangeType.getClass();
ExchangeType<? extends ExchangeType> type = exchangeTypeClass.newInstance();
registerExchangeType(type);
}
catch (ClassCastException classCastEx)
{
_logger.error("No custom exchange class: \""+String.valueOf(className)+"\" cannot be registered as it does not extend class \""+ExchangeType.class+"\"");
}
catch (IllegalAccessException e)
{
_logger.error("Cannot create custom exchange class: \""+String.valueOf(className)+"\"",e);
}
catch (InstantiationException e)
{
_logger.error("Cannot create custom exchange class: \""+String.valueOf(className)+"\"",e);
}
}
}
}