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Java > Open Source Codes > org > apache > log4j > Log4jLoggerFactory


1 /*
2  * Copyright 2001-2004 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.log4j;
18
19 import java.util.Hashtable JavaDoc;
20
21 /**
22  * This class is a factory that creates and maintains org.apache.log4j.Loggers
23  * warpping org.slf4j.Loggers.
24  *
25  * It keeps a hashtable of all created org.apache.log4j.Logger instances so that
26  * all newly created instances are not dulpicates of existing loggers.
27  *
28  * @author Sébastien Pennec
29  */
30 class Log4jLoggerFactory {
31
32   // String, Logger
33 private static Hashtable JavaDoc log4jLoggers = new Hashtable JavaDoc();
34
35   public static synchronized Logger getLogger(String JavaDoc name) {
36     if (log4jLoggers.containsKey(name)) {
37       return (org.apache.log4j.Logger) log4jLoggers.get(name);
38     } else {
39       Logger log4jLogger = new Logger(name);
40       
41       log4jLoggers.put(name, log4jLogger);
42       return log4jLogger;
43     }
44   }
45
46 }
47
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