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Java > Open Source Codes > org > apache > activemq > broker > region > QueueMessageReference


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.broker.region;
19
20 /**
21  * Queue specific MessageReference.
22  *
23  * @author fateev@amazon.com
24  * @version $Revision: 474985 $
25  */
26 public interface QueueMessageReference extends MessageReference {
27
28     public static final QueueMessageReference NULL_MESSAGE = new NullMessageReference();
29
30     public boolean isAcked();
31     
32     public void setAcked(boolean b);
33     
34     public void drop();
35  
36     public boolean isDropped();
37         
38     public boolean lock(LockOwner subscription);
39     
40     public void unlock();
41     
42     public LockOwner getLockOwner();
43 }
44
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