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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.model.adapter;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.UUID;
import org.apache.qpid.server.model.AccessControlProvider;
import org.apache.qpid.server.model.Broker;
import org.apache.qpid.server.plugin.AccessControlFactory;
import org.apache.qpid.server.plugin.QpidServiceLoader;
import org.apache.qpid.server.security.AccessControl;
public class AccessControlProviderFactory
{
private final Iterable<AccessControlFactory> _factories;
private Collection<String> _supportedAcessControlProviders;
public AccessControlProviderFactory(QpidServiceLoader<AccessControlFactory> accessControlFactoryServiceLoader)
{
_factories = accessControlFactoryServiceLoader.instancesOf(AccessControlFactory.class);
List<String> supportedAccessControlProviders = new ArrayList<String>();
for (AccessControlFactory factory : _factories)
{
supportedAccessControlProviders.add(factory.getType());
}
_supportedAcessControlProviders = Collections.unmodifiableCollection(supportedAccessControlProviders);
}
/**
* Creates {@link AccessControlProvider} for given ID, {@link Broker} and attributes.
* <p>
* The configured {@link AccessControlFactory}'s are used to try to create the {@link AccessControlProvider}.
* The first non-null instance is returned. The factories are used in non-deterministic order.
*/
public AccessControlProvider create(UUID id, Broker broker, Map<String, Object> attributes)
{
AccessControlProvider ac = createAccessControlProvider(id, broker, attributes);
ac.getAccessControl().onCreate();
return ac;
}
public AccessControlProvider recover(UUID id, Broker broker, Map<String, Object> attributes)
{
return createAccessControlProvider(id, broker, attributes);
}
private AccessControlProvider createAccessControlProvider(UUID id,
Broker broker, Map<String, Object> attributes)
{
for (AccessControlFactory factory : _factories)
{
AccessControl accessControl = factory.createInstance(attributes);
if (accessControl != null)
{
return new AccessControlProviderAdapter(id, broker,accessControl, attributes, factory.getAttributeNames());
}
}
throw new IllegalArgumentException("No access control provider factory found for configuration attributes " + attributes);
}
public Collection<String> getSupportedAuthenticationProviders()
{
return _supportedAcessControlProviders;
}
}
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