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Java > Open Source Codes > org > apache > jetspeed > portal > expire > FileWatchExpire


1 /*
2  * Copyright 2000-2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16
17 package org.apache.jetspeed.portal.expire;
18
19 //java stuff
20 import java.io.IOException JavaDoc;
21
22 // Jetspeed classes
23 import org.apache.jetspeed.services.logging.JetspeedLogFactoryService;
24 import org.apache.jetspeed.services.logging.JetspeedLogger;
25
26 /**
27 Handles expiration mechanisms that expire when the file changes.
28
29 @author <a HREF="mailto:burton@apache.org">Kevin A. Burton</a>
30 @version $Id: FileWatchExpire.java,v 1.10 2004/02/23 03:24:40 jford Exp $
31 */
32 public class FileWatchExpire extends BaseExpire
33 {
34
35     /**
36      * Static initialization of the logger for this class
37      */
38     private static final JetspeedLogger logger = JetspeedLogFactoryService.getLogger(FileWatchExpire.class.getName());
39     
40     FileWatcher fw = null;
41     
42     /**
43     @see Expire#isExpired
44     
45     @author <a HREF="mailto:burton@apache.org">Kevin A. Burton</a>
46     @version $Id: FileWatchExpire.java,v 1.10 2004/02/23 03:24:40 jford Exp $
47     */
48     public boolean isExpired() {
49         
50         if ( this.fw != null ) {
51             return this.fw.hasChanged();
52         } else {
53             return false;
54         }
55         
56         
57     }
58     
59     /**
60     Set the url on which this depends. It is required that you call this
61     method before you use it.
62     */
63     public void setURL( String JavaDoc url ) {
64         try {
65             this.fw = new FileWatcher( url, this.getPortlet().getName() );
66         } catch ( IOException JavaDoc e ) {
67             logger.error("Exception", e);
68         }
69     }
70     
71     
72 }
73
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