package org.apache.qpid.server.virtualhost;/*
*
* 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.
*
*/
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import org.apache.qpid.server.plugin.QpidServiceLoader;
import org.apache.qpid.server.plugin.VirtualHostFactory;
public class VirtualHostFactoryRegistry
{
private static Map<String, VirtualHostFactory> getFactoryMap()
{
Map<String, VirtualHostFactory> virtualHostFactories = new HashMap<String, VirtualHostFactory>();
QpidServiceLoader<VirtualHostFactory> qpidServiceLoader = new QpidServiceLoader<VirtualHostFactory>();
Iterable<VirtualHostFactory> factories = qpidServiceLoader.atLeastOneInstanceOf(VirtualHostFactory.class);
for (VirtualHostFactory virtualHostFactory : factories)
{
String type = virtualHostFactory.getType();
VirtualHostFactory factory = virtualHostFactories.put(type, virtualHostFactory);
if (factory != null)
{
throw new IllegalStateException("VirtualHostFactory with type name '" + type
+ "' is already registered using class '" + factory.getClass().getName() + "', can not register class '"
+ virtualHostFactory.getClass().getName() + "'");
}
}
return virtualHostFactories;
}
public static Collection<VirtualHostFactory> getFactories()
{
return Collections.unmodifiableCollection(getFactoryMap().values());
}
public static Collection<String> getVirtualHostTypes()
{
return Collections.unmodifiableCollection(getFactoryMap().keySet());
}
public static VirtualHostFactory getFactory(String type)
{
return getFactoryMap().get(type);
}
}