1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. 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,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.maven.cling.logging;
20
21 import org.codehaus.plexus.logging.Logger;
22 import org.codehaus.plexus.logging.LoggerManager;
23 import org.slf4j.ILoggerFactory;
24 import org.slf4j.LoggerFactory;
25
26 /**
27 * Use an SLF4J {@link ILoggerFactory} as a backing for a Plexus
28 * {@link LoggerManager},
29 * ignoring Plexus logger API parts that are not classical and probably not really used.
30 *
31 * @since 3.1
32 */
33 public class Slf4jLoggerManager implements LoggerManager {
34
35 private final ILoggerFactory loggerFactory;
36
37 public Slf4jLoggerManager() {
38 loggerFactory = LoggerFactory.getILoggerFactory();
39 }
40
41 @Override
42 public Logger getLoggerForComponent(String role) {
43 return new Slf4jLogger(loggerFactory.getLogger(role));
44 }
45
46 /**
47 * The logger name for a component with a non-null hint is <code>role.hint</code>.
48 * <b>Warning</b>: this does not conform to logger name as class name convention.
49 * (and what about <code>null</code> and <code>default</code> hint equivalence?)
50 */
51 @Override
52 public Logger getLoggerForComponent(String role, String hint) {
53 return (null == hint
54 ? getLoggerForComponent(role)
55 : new Slf4jLogger(loggerFactory.getLogger(role + '.' + hint)));
56 }
57
58 //
59 // Trying to give loggers back is a bad idea. Ceki said so :-)
60 // notice to self: what was this method supposed to do?
61 //
62 /**
63 * <b>Warning</b>: ignored.
64 */
65 @Override
66 public void returnComponentLogger(String role) {}
67
68 /**
69 * <b>Warning</b>: ignored.
70 */
71 @Override
72 public void returnComponentLogger(String role, String hint) {}
73
74 /**
75 * <b>Warning</b>: ignored (always return <code>0</code>).
76 */
77 @Override
78 public int getThreshold() {
79 return 0;
80 }
81
82 /**
83 * <b>Warning</b>: ignored.
84 */
85 @Override
86 public void setThreshold(int threshold) {}
87
88 /**
89 * <b>Warning</b>: ignored.
90 */
91 @Override
92 public void setThresholds(int threshold) {}
93
94 /**
95 * <b>Warning</b>: ignored (always return <code>0</code>).
96 */
97 @Override
98 public int getActiveLoggerCount() {
99 return 0;
100 }
101 }