socketmanagedconnectionfactory.java

来自「一个java方面的消息订阅发送的源码」· Java 代码 · 共 141 行

/**
 * Redistribution and use of this software and associated documentation
 * ("Software"), with or without modification, are permitted provided
 * that the following conditions are met:
 *
 * 1. Redistributions of source code must retain copyright
 *    statements and notices.  Redistributions must also contain a
 *    copy of this document.
 *
 * 2. Redistributions in binary form must reproduce the
 *    above copyright notice, this list of conditions and the
 *    following disclaimer in the documentation and/or other
 *    materials provided with the distribution.
 *
 * 3. The name "Exolab" must not be used to endorse or promote
 *    products derived from this Software without prior written
 *    permission of Exoffice Technologies.  For written permission,
 *    please contact [e-mail].
 *
 * 4. Products derived from this Software may not be called "Exolab"
 *    nor may "Exolab" appear in their names without prior written
 *    permission of Exoffice Technologies. Exolab is a registered
 *    trademark of Exoffice Technologies.
 *
 * 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
 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
 * EXOFFICE TECHNOLOGIES OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Copyright 2004-2005 (C) Exoffice Technologies Inc. All Rights Reserved.
 *
 * $Id: SocketManagedConnectionFactory.java,v 1.5 2005/04/19 12:20:52 tanderson Exp $
 */
package org.exolab.jms.net.socket;

import java.security.Principal;
import java.util.Iterator;
import java.util.List;

import org.exolab.jms.net.connector.ConnectionRequestInfo;
import org.exolab.jms.net.connector.ManagedConnection;
import org.exolab.jms.net.connector.ManagedConnectionAcceptor;
import org.exolab.jms.net.connector.ManagedConnectionFactory;
import org.exolab.jms.net.connector.ResourceException;
import org.exolab.jms.net.uri.URI;
import org.exolab.jms.net.uri.URIHelper;


/**
 * A factory for concrete {@link SocketManagedConnection} and {@link
 * SocketManagedConnectionAcceptor} instances.
 *
 * @author <a href="mailto:[e-mail]">Tim Anderson</a>
 * @version $Revision: 1.5 $ $Date: 2005/04/19 12:20:52 $
 */
public abstract class SocketManagedConnectionFactory
        implements ManagedConnectionFactory {

    /**
     * Returns a matched connection from the candidate set of connections.
     *
     * @param connections the candidate connections
     * @param principal   the security principal
     * @param info        the connection request info
     * @return the first acceptable match, or <code>null</code> if none is
     *         found
     * @throws ResourceException for any error
     */
    public ManagedConnection matchManagedConnections(List connections,
                                                     Principal principal,
                                                     ConnectionRequestInfo info)
            throws ResourceException {
        ManagedConnection result = null;

        if (info instanceof SocketRequestInfo) {
            SocketRequestInfo requestInfo = (SocketRequestInfo) info;
            URI uri = URIHelper.convertHostToAddress(requestInfo.getURI());
            URI altURI = requestInfo.getAlternativeURI();
            if (altURI != null) {
                altURI = URIHelper.convertHostToAddress(altURI);
            }

            Iterator iterator = connections.iterator();
            while (iterator.hasNext()) {
                SocketManagedConnection connection =
                        (SocketManagedConnection) iterator.next();
                if (connection.hasPrincipal(principal)) {
                    final URI remote = connection.getRemoteURI();
                    final URI local = connection.getLocalURI();
                    if (remote.equals(uri) || local.equals(uri)
                       || remote.equals(altURI) || local.equals(altURI)) {
                        result = connection;
                        break;
                    }
                }
            }
        }
        return result;
    }

    /**
     * Returns a matched connection acceptor from the candidate set of
     * acceptors.
     *
     * @param acceptors the candidate connection acceptors
     * @param info      the connection request info
     * @return the first acceptable match, or <code>null</code> if none is
     *         found
     * @throws ResourceException for any error
     */
    public ManagedConnectionAcceptor matchManagedConnectionAcceptors(
            List acceptors, ConnectionRequestInfo info)
            throws ResourceException {
        ManagedConnectionAcceptor result = null;

        if (info instanceof SocketRequestInfo) {
            Iterator iterator = acceptors.iterator();
            while (iterator.hasNext()) {
                SocketManagedConnectionAcceptor acceptor =
                        (SocketManagedConnectionAcceptor) iterator.next();
                if (info.equals(acceptor.getRequestInfo())) {
                    result = acceptor;
                    break;
                }
            }
        }
        return result;
    }
}