/*
*
* 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
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package org.apache.qpid.server.exchange;
import org.apache.log4j.Logger;
import org.apache.qpid.AMQException;
import org.apache.qpid.AMQSecurityException;
import org.apache.qpid.AMQUnknownExchangeType;
import org.apache.qpid.exchange.ExchangeDefaults;
import org.apache.qpid.framing.AMQShortString;
import org.apache.qpid.server.model.UUIDGenerator;
import org.apache.qpid.server.plugin.ExchangeType;
import org.apache.qpid.server.plugin.QpidServiceLoader;
import org.apache.qpid.server.virtualhost.VirtualHost;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
public class DefaultExchangeFactory implements ExchangeFactory
{
public static final String DEFAULT_DLE_NAME_SUFFIX = "_DLE";
private static final Logger LOGGER = Logger.getLogger(DefaultExchangeFactory.class);
private static final String[] BASE_EXCHANGE_TYPES =
new String[]{ExchangeDefaults.DIRECT_EXCHANGE_CLASS,
ExchangeDefaults.FANOUT_EXCHANGE_CLASS,
ExchangeDefaults.HEADERS_EXCHANGE_CLASS,
ExchangeDefaults.TOPIC_EXCHANGE_CLASS};
private final VirtualHost _host;
private Map<String, ExchangeType<? extends Exchange>> _exchangeClassMap = new HashMap<String, ExchangeType<? extends Exchange>>();
public DefaultExchangeFactory(VirtualHost host)
{
_host = host;
@SuppressWarnings("rawtypes")
Iterable<ExchangeType> exchangeTypes = loadExchangeTypes();
for (ExchangeType<?> exchangeType : exchangeTypes)
{
String typeName = exchangeType.getType();
if(LOGGER.isDebugEnabled())
{
LOGGER.debug("Registering exchange type '" + typeName + "' using class '" + exchangeType.getClass().getName() + "'");
}
if(_exchangeClassMap.containsKey(typeName))
{
ExchangeType<?> existingType = _exchangeClassMap.get(typeName);
throw new IllegalStateException("ExchangeType with type name '" + typeName + "' is already registered using class '"
+ existingType.getClass().getName() + "', can not register class '"
+ exchangeType.getClass().getName() + "'");
}
_exchangeClassMap.put(typeName, exchangeType);
}
for(String type : BASE_EXCHANGE_TYPES)
{
if(!_exchangeClassMap.containsKey(type))
{
throw new IllegalStateException("Did not find expected exchange type: " + type);
}
}
}
@SuppressWarnings("rawtypes")
protected Iterable<ExchangeType> loadExchangeTypes()
{
return new QpidServiceLoader<ExchangeType>().atLeastOneInstanceOf(ExchangeType.class);
}
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());
return publicTypes;
}
public Exchange createExchange(String exchange, String type, boolean durable, boolean autoDelete)
throws AMQException
{
UUID id = UUIDGenerator.generateExchangeUUID(exchange, _host.getName());
return createExchange(id, exchange, type, durable, autoDelete);
}
public Exchange createExchange(UUID id, String exchange, String type, boolean durable, boolean autoDelete)
throws AMQException
{
// Check access
if (!_host.getSecurityManager().authoriseCreateExchange(autoDelete, durable, exchange, null, null, null, type))
{
String description = "Permission denied: exchange-name '" + exchange + "'";
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(id, _host, exchange, durable, autoDelete);
return e;
}
@Override
public Exchange restoreExchange(UUID id, String exchange, String type, boolean autoDelete) throws AMQException
{
return createExchange(id, exchange, type, true, autoDelete);
}
}