MessageAvailableConsumer


1   /**
2    *
3    * Licensed to the Apache Software Foundation (ASF) under one or more
4    * contributor license agreements.  See the NOTICE file distributed with
5    * this work for additional information regarding copyright ownership.
6    * The ASF licenses this file to You under the Apache License, Version 2.0
7    * (the "License"); you may not use this file except in compliance with
8    * the License.  You may obtain a copy of the License at
9    *
10   * http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  package org.apache.activemq;
19  
20  import javax.jms.MessageConsumer  ;
21  
22  /**
23   * An extended JMS interface that adds the ability to be notified when a 
24   * message is available for consumption using the receive*() methods
25   * which is useful in Ajax style subscription models.
26   * 
27   * @version $Revision: 1.1 $
28   */
29  public interface MessageAvailableConsumer extends MessageConsumer   {
30  
31      /**
32       * Sets the listener used to notify synchronous consumers that there is a message
33       * available so that the {@link MessageConsumer#receiveNoWait()} can be called.
34       */
35      public void setAvailableListener(MessageAvailableListener availableListener);
36  
37      /**
38       * Gets the listener used to notify synchronous consumers that there is a message
39       * available so that the {@link MessageConsumer#receiveNoWait()} can be called.
40       */
41      public MessageAvailableListener getAvailableListener();
42  }
43
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