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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.nclient.security;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.log4j.Logger;
import org.apache.qpid.nclient.config.ClientConfiguration;
import org.apache.qpid.nclient.core.QpidConstants;
public class CallbackHandlerRegistry
{
private static final Logger _logger = Logger.getLogger(CallbackHandlerRegistry.class);
private static CallbackHandlerRegistry _instance = new CallbackHandlerRegistry();
private Map<String,Class> _mechanismToHandlerClassMap = new HashMap<String,Class>();
private String _mechanisms;
public static CallbackHandlerRegistry getInstance()
{
return _instance;
}
public Class getCallbackHandlerClass(String mechanism)
{
return _mechanismToHandlerClassMap.get(mechanism);
}
public String getMechanisms()
{
return _mechanisms;
}
private CallbackHandlerRegistry()
{
// first we register any Sasl client factories
DynamicSaslRegistrar.registerSaslProviders();
parseProperties();
}
private void parseProperties()
{
List<String> mechanisms = ClientConfiguration.get().getList(QpidConstants.AMQP_SECURITY_MECHANISMS);
for (String mechanism : mechanisms)
{
String className = ClientConfiguration.get().getString(QpidConstants.AMQP_SECURITY_MECHANISM_HANDLER + "_" + mechanism);
Class clazz = null;
try
{
clazz = Class.forName(className);
if (!AMQPCallbackHandler.class.isAssignableFrom(clazz))
{
_logger.warn("SASL provider " + clazz + " does not implement " + AMQPCallbackHandler.class +
". Skipping");
continue;
}
_mechanismToHandlerClassMap.put(mechanism, clazz);
if (_mechanisms == null)
{
_mechanisms = mechanism;
}
else
{
// one time cost
_mechanisms = _mechanisms + " " + mechanism;
}
}
catch (ClassNotFoundException ex)
{
_logger.warn("Unable to load class " + className + ". Skipping that SASL provider");
continue;
}
}
}
}
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