01: /*
02: * Copyright 2001-2004 The Apache Software Foundation.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
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;
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 log4jLoggers = new Hashtable();
34:
35: public static synchronized Logger getLogger(String 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: }
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