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1 /*
2  * Copyright 1999-2004 The Apache Software Foundation
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
12  * implied.
13  *
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17 package org.apache.excalibur.event.impl;
18
19 import org.apache.excalibur.event.DequeueInterceptor;
20 import org.apache.excalibur.event.Source;
21
22 /**
23  * The dequeue executable interface describes operations that
24  * are executed before and after elements are pulled from a
25  * queue.
26  *
27  * @author <a HREF="mailto:dev@avalon.apache.org">Avalon Development Team</a>
28  * @version $Revision: 1.4 $
29  */
30 public final class NullDequeueInterceptor implements DequeueInterceptor
31 {
32
33     /**
34      * An operation executed before dequeing events from
35      * the queue. The size of the queue is passed in so the
36      * implementation can determine to execute based on the
37      * size of the queue.
38      * @since Feb 10, 2003
39      *
40      * @param context
41      * The source from which the dequeue is performed.
42      */
43     public void before(Source context) {}
44
45     /**
46      * An operation executed after dequeing events from
47      * the queue. The size of the queue is passed in so the
48      * implementation can determine to execute based on the
49      * size of the queue.
50      * @since Feb 10, 2003
51      *
52      * @param context
53      * The source from which the dequeue is performed.
54      */
55     public void after(Source context) {}
56
57 }
58
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