rmiinvokerfactoryimpl.java

来自「OpenJMS是一个开源的Java Message Service API 1.」· Java 代码 · 共 128 行

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 *    above copyright notice, this list of conditions and the
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 *    please contact [e-mail].
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 *    permission of Exoffice Technologies. Exolab is a registered
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 *
 * 5. Due credit should be given to the Exolab Project
 *    (http://www.exolab.org/).
 *
 * THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
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 * EXOFFICE TECHNOLOGIES OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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 * Copyright 2003-2005 (C) Exoffice Technologies Inc. All Rights Reserved.
 *
 * $Id: RMIInvokerFactoryImpl.java,v 1.2 2005/04/17 14:01:30 tanderson Exp $
 */
package org.exolab.jms.net.rmi;

import java.rmi.RemoteException;
import java.rmi.AccessException;
import java.rmi.server.RemoteObject;
import java.security.Principal;

import org.exolab.jms.net.connector.ManagedConnectionAcceptorListener;
import org.exolab.jms.net.connector.Authenticator;
import org.exolab.jms.net.connector.ResourceException;
import org.exolab.jms.net.uri.URIHelper;


/**
 * A factory for {@link RMIInvoker} instances.
 *
 * @author <a href="mailto:[e-mail]">Tim Anderson</a>
 * @version $Revision: 1.2 $ $Date: 2005/04/17 14:01:30 $
 */
public class RMIInvokerFactoryImpl
        extends RemoteObject implements RMIInvokerFactory {

    /**
     * The connection authenticator.
     */
    private final Authenticator _authenticator;

    /**
     * The connection acceptor that constructed this.
     */
    private final RMIManagedConnectionAcceptor _acceptor;

    /**
     * The listener to delegate accepted connections to.
     */
    private final ManagedConnectionAcceptorListener _listener;


    /**
     * Construct a new <code>RMIInvokerFactoryImpl</code>.
     *
     * @param authenticator the connection authenticator
     * @param acceptor the connection acceptor that constructed this
     * @param listener the listsner to delegate new connections to
     */
    public RMIInvokerFactoryImpl(Authenticator authenticator,
                                 RMIManagedConnectionAcceptor acceptor,
                                 ManagedConnectionAcceptorListener listener) {
        _authenticator = authenticator;
        _acceptor = acceptor;
        _listener = listener;

    }

    /**
     * Creates an authenticated invoker.
     *
     * @param principal the security principal
     * @param client    the invoker for performing invocations back to the
     *                  client
     * @param uri       the URI representing the client
     * @return an authenticated invoker
     * @throws RemoteException for any remote error
     */
    public RMIInvoker createInvoker(Principal principal, RMIInvoker client,
                                    String uri)
            throws RemoteException {
        try {
            if (!_authenticator.authenticate(principal)) {
                throw new AccessException("Failed to authenticate");
            }
        } catch (ResourceException exception) {
            throw new AccessException("Failed to authenticate", exception);
        }
        RMIInvokerImpl invoker = new RMIInvokerImpl();
        RMIManagedConnection connection =
                new RMIManagedConnection(principal, invoker, _acceptor.getURI(),
                                         client, URIHelper.parse(uri));
        _listener.accepted(_acceptor, connection);
        return invoker;
    }

}