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Java > Open Source Codes > org > apache > velocity > runtime > log > PrimordialLogSystem


1 package org.apache.velocity.runtime.log;
2
3 /*
4  * Copyright 2001,2004 The Apache Software Foundation.
5  *
6  * Licensed under the Apache License, Version 2.0 (the "License");
7  * you may not use this file except in compliance with the License.
8  * 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
19 import java.util.Vector JavaDoc;
20 import java.util.Enumeration JavaDoc;
21
22 import org.apache.velocity.runtime.RuntimeServices;
23
24 /**
25  * Pre-init logger. I believe that this was suggested by
26  * Carsten Ziegeler <cziegeler@sundn.de> and
27  * Jeroen C. van Gelderen. If this isn't correct, let me
28  * know as this was a good idea...
29  *
30  * @author <a HREF="mailto:geirm@optonline.net">Geir Magnusson Jr.</a>
31  * @version $Id: PrimordialLogSystem.java,v 1.4.4.1 2004/03/03 23:22:56 geirm Exp $
32  */
33 public class PrimordialLogSystem implements LogSystem
34 {
35     private Vector JavaDoc pendingMessages = new Vector JavaDoc();
36     private RuntimeServices rsvc = null;
37
38     /**
39      * default CTOR.
40      */
41     public PrimordialLogSystem()
42     {
43     }
44
45     public void init( RuntimeServices rs )
46         throws Exception JavaDoc
47     {
48         rsvc = rs;
49     }
50     
51     /**
52      * logs messages. All we do is store them until
53      * 'later'.
54      *
55      * @param level severity level
56      * @param message complete error message
57      */
58     public void logVelocityMessage(int level, String JavaDoc message)
59     {
60         synchronized( this )
61         {
62             Object JavaDoc[] data = new Object JavaDoc[2];
63             data[0] = new Integer JavaDoc(level);
64             data[1] = message;
65             pendingMessages.addElement(data);
66         }
67     }
68     
69     /**
70      * dumps the log messages this logger is holding into a new logger
71      */
72     public void dumpLogMessages( LogSystem newLogger )
73     {
74         synchronized( this )
75         {
76             if ( !pendingMessages.isEmpty())
77             {
78                 /*
79                  * iterate and log each individual message...
80                  */
81             
82                 for( Enumeration JavaDoc e = pendingMessages.elements(); e.hasMoreElements(); )
83                 {
84                     Object JavaDoc[] data = (Object JavaDoc[]) e.nextElement();
85                     newLogger.logVelocityMessage(((Integer JavaDoc) data[0]).intValue(), (String JavaDoc) data[1]);
86                 }
87             }
88         }
89     }
90 }
91
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