/*
 * The contents of this file are subject to the terms
 * of the Common Development and Distribution License
 * (the License).  You may not use this file except in
 * compliance with the License.
 *
 * You can obtain a copy of the license at
 * https://glassfish.dev.java.net/public/CDDLv1.0.html or
 * glassfish/bootstrap/legal/CDDLv1.0.txt.
 * See the License for the specific language governing
 * permissions and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL
 * Header Notice in each file and include the License file
 * at glassfish/bootstrap/legal/CDDLv1.0.txt.
 * If applicable, add the following below the CDDL Header,
 * with the fields enclosed by brackets [] replaced by
 * you own identifying information:
 * "Portions Copyrighted [year] [name of copyright owner]"
 *
 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
 */

package javax.jms;

/** A client uses a <CODE>QueueReceiver</CODE> object to receive messages that
 * have been delivered to a queue.
 *
 * <P>Although it is possible to have multiple <CODE>QueueReceiver</CODE>s
 * for the same queue, the JMS API does not define how messages are
 * distributed between the <CODE>QueueReceiver</CODE>s.
 *
 * <P>If a <CODE>QueueReceiver</CODE> specifies a message selector, the
 * messages that are not selected remain on the queue. By definition, a message
 * selector allows a <CODE>QueueReceiver</CODE> to skip messages. This
 * means that when the skipped messages are eventually read, the total ordering
 * of the reads does not retain the partial order defined by each message
 * producer. Only <CODE>QueueReceiver</CODE>s without a message selector
 * will read messages in message producer order.
 *
 * <P>Creating a <CODE>MessageConsumer</CODE> provides the same features as
 * creating a <CODE>QueueReceiver</CODE>. A <CODE>MessageConsumer</CODE> object is
 * recommended for creating new code. The  <CODE>QueueReceiver</CODE> is
 * provided to support existing code.
 *
 * @version     1.1 February 2, 2002
 * @author      Mark Hapner
 * @author      Rich Burridge
 * @author      Kate Stout
 *
 * @see         javax.jms.Session#createConsumer(Destination, String)
 * @see         javax.jms.Session#createConsumer(Destination)
 * @see         javax.jms.QueueSession#createReceiver(Queue, String)
 * @see         javax.jms.QueueSession#createReceiver(Queue)
 * @see         javax.jms.MessageConsumer
 */

public interface QueueReceiver extends MessageConsumer
{

  /** Gets the <CODE>Queue</CODE> associated with this queue receiver.
    *
    * @return this receiver's <CODE>Queue</CODE>
    *
    * @exception JMSException if the JMS provider fails to get the queue for
    *                         this queue receiver
    *                         due to some internal error.
    */

  Queue getQueue() throws JMSException;
}