1 package org.apache.maven.cli.logging;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 import java.io.IOException;
23 import java.net.URL;
24 import java.util.Enumeration;
25 import java.util.Properties;
26
27 import org.codehaus.plexus.util.PropertyUtils;
28 import org.slf4j.ILoggerFactory;
29
30 /**
31 * Slf4jConfiguration factory, loading implementations from <code>META-INF/maven/slf4j-configuration.properties</code>
32 * configuration files in class loader: key is the class name of the ILoggerFactory, value is the class name of
33 * the corresponding Slf4jConfiguration.
34 *
35 * @author Hervé Boutemy
36 * @since 3.1.0
37 */
38 public class Slf4jConfigurationFactory
39 {
40 public static final String RESOURCE = "META-INF/maven/slf4j-configuration.properties";
41
42 public static Slf4jConfiguration getConfiguration( ILoggerFactory loggerFactory )
43 {
44 try
45 {
46 Enumeration<URL> resources = Slf4jConfigurationFactory.class.getClassLoader().getResources( RESOURCE );
47
48 String key = loggerFactory.getClass().getCanonicalName();
49
50 while ( resources.hasMoreElements() )
51 {
52 URL resource = resources.nextElement();
53
54 Properties conf = PropertyUtils.loadProperties( resource.openStream() );
55
56 String impl = conf.getProperty( key );
57
58 if ( impl != null )
59 {
60 return (Slf4jConfiguration) Class.forName( impl ).newInstance();
61 }
62 }
63 }
64 catch ( IOException e )
65 {
66 e.printStackTrace();
67 }
68 catch ( InstantiationException e )
69 {
70 e.printStackTrace();
71 }
72 catch ( IllegalAccessException e )
73 {
74 e.printStackTrace();
75 }
76 catch ( ClassNotFoundException e )
77 {
78 e.printStackTrace();
79 }
80
81 return new BaseSlf4jConfiguration();
82 }
83 }