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.cli.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 org.slf4j.ILoggerFactory} as a backing for a Plexus
28 * {@link org.codehaus.plexus.logging.LoggerManager},
29 * ignoring Plexus logger API parts that are not classical and probably not really used.
30 *
31 * @author Jason van Zyl
32 * @since 3.1
33 */
34 public class Slf4jLoggerManager implements LoggerManager {
35
36 private ILoggerFactory loggerFactory;
37
38 public Slf4jLoggerManager() {
39 loggerFactory = LoggerFactory.getILoggerFactory();
40 }
41
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 public Logger getLoggerForComponent(String role, String hint) {
52 return (null == hint
53 ? getLoggerForComponent(role)
54 : new Slf4jLogger(loggerFactory.getLogger(role + '.' + hint)));
55 }
56
57 //
58 // Trying to give loggers back is a bad idea. Ceki said so :-)
59 // notice to self: what was this method supposed to do?
60 //
61 /**
62 * <b>Warning</b>: ignored.
63 */
64 public void returnComponentLogger(String role) {}
65
66 /**
67 * <b>Warning</b>: ignored.
68 */
69 public void returnComponentLogger(String role, String hint) {}
70
71 /**
72 * <b>Warning</b>: ignored (always return <code>0</code>).
73 */
74 public int getThreshold() {
75 return 0;
76 }
77
78 /**
79 * <b>Warning</b>: ignored.
80 */
81 public void setThreshold(int threshold) {}
82
83 /**
84 * <b>Warning</b>: ignored.
85 */
86 public void setThresholds(int threshold) {}
87
88 /**
89 * <b>Warning</b>: ignored (always return <code>0</code>).
90 */
91 public int getActiveLoggerCount() {
92 return 0;
93 }
94 }