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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.jmx;
import static javax.management.remote.JMXConnectionNotification.CLOSED;
import static javax.management.remote.JMXConnectionNotification.FAILED;
import java.io.IOException;
import java.rmi.server.RMIClientSocketFactory;
import java.rmi.server.RMIServerSocketFactory;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import javax.management.Notification;
import javax.management.NotificationFilter;
import javax.management.NotificationListener;
import javax.management.remote.JMXConnectionNotification;
import javax.management.remote.JMXConnectorServer;
import javax.management.remote.rmi.RMIConnection;
import javax.management.remote.rmi.RMIJRMPServerImpl;
import javax.security.auth.Subject;
import org.apache.qpid.server.security.auth.AuthenticatedPrincipal;
/**
* An implementation of RMIJRMPServerImpl that caches the usernames of users as they log-on
* and makes the same available via {@link UsernameAccessor#getUsernameForConnectionId(String)}.
*
* Caller is responsible for installing this object as a {@link NotificationListener} of the
* {@link JMXConnectorServer} so the cache entries are removed as the clients disconnect.
*
*/
public class UsernameCachingRMIJRMPServer extends RMIJRMPServerImpl implements NotificationListener, NotificationFilter, UsernameAccessor
{
// ConnectionId is guaranteed to be unique per client connection, according to the JMX spec.
private final Map<String, String> _connectionIdUsernameMap = new ConcurrentHashMap<String, String>();
UsernameCachingRMIJRMPServer(int port, RMIClientSocketFactory csf, RMIServerSocketFactory ssf,
Map<String, ?> env) throws IOException
{
super(port, csf, ssf, env);
}
@Override
protected RMIConnection makeClient(String connectionId, Subject subject) throws IOException
{
final RMIConnection makeClient = super.makeClient(connectionId, subject);
final AuthenticatedPrincipal authenticatedPrincipalFromSubject = AuthenticatedPrincipal.getAuthenticatedPrincipalFromSubject(subject);
_connectionIdUsernameMap.put(connectionId, authenticatedPrincipalFromSubject.getName());
return makeClient;
}
@Override
public String getUsernameForConnectionId(String connectionId)
{
return _connectionIdUsernameMap.get(connectionId);
}
@Override
public void handleNotification(Notification notification, Object handback)
{
final String connectionId = ((JMXConnectionNotification) notification).getConnectionId();
removeConnectionIdFromCache(connectionId);
}
@Override
public boolean isNotificationEnabled(Notification notification)
{
return isClientDisconnectEvent(notification);
}
private void removeConnectionIdFromCache(String connectionId)
{
_connectionIdUsernameMap.remove(connectionId);
}
private boolean isClientDisconnectEvent(Notification notification)
{
final String type = notification.getType();
return CLOSED.equals(type) || FAILED.equals(type);
}
}
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