adminconnectionmanager.java

一个java方面的消息订阅发送的源码

/**
 * 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 2000-2005 (C) Exoffice Technologies Inc. All Rights Reserved.
 */
package org.exolab.jms.server;

import javax.jms.JMSException;
import javax.jms.JMSSecurityException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.exolab.jms.authentication.AuthenticationMgr;
import org.exolab.jms.server.AdminConnection;

/**
 * <code>AdminConnectionManager</code> is responsible for creating
 * authenticated {@link AdminConnection} instances
 *
 *  The connection manager is a singleton (at this point anyway)
 * that is accessible through the instance class method. It is also responsible
 * for holding a list of adminconnections.
 *
 * @version     $Revision: 1.2 $ $Date: 2005/03/18 04:07:02 $
 * @author      <a href="mailto:[e-mail]">Knut Lerpold</a>
 * @author      <a href="mailto:[e-mail]">Tim Anderson</a>
 * @see         AdminConnection
 */
public class AdminConnectionManager {

    /**
     * The singleton instance
     */
    private static AdminConnectionManager _instance =
        new AdminConnectionManager();

    /**
     * Construct a new <code>AdminConnectionManager</code>.
     */
    private AdminConnectionManager() {
    }

    /**
     * Returns the singleton instance of this class
     *
     * @return the singleton isntance
     */
    public static AdminConnectionManager instance() {
        return _instance;
    }

    /**
     * Create a new admin connection
     *
     * @param username the client's username
     * @param password the client's password
     * @return a new admin connection
     * @throws JMSSecurityException if the client cannot be authenticated
     * @throws JMSException if the connection cannot be created
     */
    public AdminConnection createConnection(String username, String password)
        throws JMSSecurityException, JMSException {

        if (!AuthenticationMgr.instance().validateUser(username, password)) {
            throw new JMSSecurityException("Failed to authenticate user "
                + username);
        }

        return new AdminConnection();
    }

}